JPH1132228A - Device and method for transmission, device and method for reception, system and method for processing picture, device and method for processing image data, and medium for providing image data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the appearances of color for images the same on a transmission-side input device and on a reception-side output device. SOLUTION: RGB data outputted from a transmission-side CRT monitor 3 are converted into XYZ data by means of a profile P1 stored in a converter 11, while a visual environment converting circuit 12 corrects the XYZ data according to the visual environment on the transmission side by referring to detected signals from sensors S1 and S2 , and outputs the data as L<+> M<+> S<+> data. Another visual environment converting circuit 15 corrects the data according to the visual environment on the reception side by referring to detected signals from sensors S3 and S4 , and supplies the obtained XYZ data to a comparator 16. The comparator 16 converts the XYZ data into the RGB data by referring to a profile P4 and outputs the RGB data to a CRT monitor 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a transmitting apparatus, a transmitting method, a receiving apparatus, a receiving method, an image processing system, an image processing method, an image data processing apparatus, an image data processing method, and a providing medium. The present invention relates to a transmitting device, a transmitting method, a receiving device, a receiving method, an image processing system, an image processing method, an image data processing device, an image data processing method, and a providing medium that can match the appearance.

[0002]

2. Description of the Related Art Conventionally, devices such as a CRT monitor, a printer, a scanner, and a video camera capable of capturing or outputting an image (including, for example, printing and outputting the image on a paper and displaying the image). Image data is transmitted between devices, and an image captured by one device (input device) or displayed image is output (for example, printed on paper) by another device (output device),
In the case of displaying, for example, processing has been performed on an input device or an output device based on image data such as RGB data or CMY (K) data defined respectively. For this reason, the characteristics of the device (for example, the filter built into the device, Phosphor,
Due to differences in the characteristics of ink and the like, color shift has occurred between the image on the input device and the image on the output device.

Therefore, the color space of image data defined for each device is changed to an intermediate color space (for example, XYZ (CIE / XYZ) which is a color space defined by the CIE (International Commission on Illumination)).
Or L ^* a ^* b ^* (CIE / L ^* a ^* b ^* )), and as long as the image data is the same in this intermediate color space, the image corresponding to the image data is transferred to any device. There is a method in which even if the color is output, the color becomes the same at the colorimetric value level.

In this case, when converting the color space, for example, RGB as image data for each device and XYZ as data in an intermediate color space corresponding thereto are used, for example.
For example, a profile called a profile described in the form of a conversion table or a conversion formula is used.

[0005] This profile is used, for example, when various image data are given to a device, the color of an image output from the device is measured, or when an image with various colorimetric values is given to the device, the device is used. Is generated for each device by detecting the value of the image data obtained from, and associating the image data with the colorimetric values.

Thus, according to the profile created for the device A, for example, the RGB data defined for the device A is converted into the X data corresponding to the colorimetric value of the corresponding image.
Converted to YZ data. Therefore, by converting the XYZ data into RGB data defined for the device B using the profile created for the other device B, the device B uses the same color (colorimetric Value) is obtained.

According to the profile of the device B, the RGB data defined for the device B is converted to XYZ data corresponding to the colorimetric value of the image corresponding to the device B. Therefore, by converting the XYZ data into RGB data defined for the device A using the profile for the device A, the image of the same color (colorimetric value) as the image on the device B is generated on the device A. can get.

Here, since the data (image data) converted into the intermediate color space by the profile does not depend on the device, it is device independent color (Device Independent Color) or device independent data (Device Independent Data). Data). Hereinafter, this data is abbreviated as DIC as appropriate. Data (image data) defined for each device is stored in a device dependent color (De-
vice Dependent Color) or device dependent data (Device Dependent Data). Hereinafter, this data is abbreviated as DDC as appropriate.

FIG. 38 is a block diagram showing a configuration of an example of a conventional image processing system for exchanging image data using the above-described profile. FIG.
39 shows a data flow in the image processing system of FIG. 38.

In FIG. 38, a scanner 43 is used as an input device, and a CRT monitor 42 and a printer 4 are used.
Assuming that the output device 4 is an output device, first, the scanner 43 captures an image (captured image) drawn on paper or the like, and outputs RGB data (for example, RGB data as DDC defined by the scanner 43) corresponding to the image. ) Is generated. The RGB data is supplied to the converter 412, where the RGB data is converted into, for example, XYZ data as DIC using a profile for the scanner 43 created and stored in advance, and output to the mapping unit 414.

The mapping section 414 is configured, for example, as shown in FIG. The XYZ data from the converter 412 is converted by the conversion unit 414a into, for example, data (L ^* a ^* b ^* data) on the L ^* a ^* b ^* space, which is a visual uniform space, and is output to the mapping table 414d. . In the mapping table 414d, L ^* a ^* from the conversion unit 414a is used ^.
The b ^* data is subjected to, for example, a color reproduction area compression process.

Here, not all colors corresponding to the image data generated by the scanner 43 can be reproduced by the CRT monitor 42 or the printer 44. Therefore, in the mapping table 414d, the conversion unit 414a
The L ^* a ^* b ^* data, that is, the colors that cannot be handled by the CRT monitor 42 or the printer 44 among the colors that can be handled by the scanner 43, are the colors that can be handled by the CRT monitor 42 or the printer 44 that are closest to the colors. The compression process of the color reproduction region, which is a process of mapping each color, is performed.

The mapping table 414d includes:
When the CRT monitor 42, the scanner 43, and the printer 44 are used as an input device and an output device, the correspondence between the color reproducible area (color gamut) of the input device and the color reproduction area of the output device is stored. From 414a
When L ^* a ^* b ^* data is given as an address, the corresponding L ^* a ^* b ^* data is converted to the conversion unit 414b or 41.
4c.

The conversion unit 414b or 414c converts the L ^* a ^* b ^* data output from the mapping table 414d into XYZ data, and converts the data into XYZ data.
13 respectively.

In the converter 411, the mapping unit 41
The XYZ data as the DIC data from the conversion unit 414b (the conversion unit 414b) is used as a DDC, for example, by using a profile for the CRT monitor 42 created and stored in advance.
The data is converted into GB data and supplied to the CRT monitor 42. CRT
On the monitor 42, an image corresponding to the RGB data from the converter 411 is displayed (a display image is output).

On the other hand, in converter 413, X as DIC data from mapping section 414 (conversion section 414c) is output.
The YZ data is converted into, for example, CMY (K) data as DDC using a profile for the printer 44 created and stored in advance, and is supplied to the printer 44. In the printer 44, the CMY (K) from the converter 413
An image corresponding to the data is printed and output on a print sheet (a print image is output).

Since the CRT monitor 42 can be used not only as an output device but also as an input device in the same manner as the scanner 43, the display image, the CRT monitor 42, and the converter 41 are shown in FIGS.
1. The mapping unit 414 is connected by a two-way arrow.

As described above, the captured image captured by the scanner 43 is output by the CRT monitor 42 or the printer 44, so that the displayed image or print image has the same colorimetric value as the captured image. , The occurrence of color misregistration is prevented.

When a profile is used, the colorimetric conditions at the time of creating the profile and the viewing environment (brightness, chromaticity, background, etc. of the surrounding light) for actually observing the captured image, print image, and display image. If they differ, the visual sensitivity of the observer changes, so that the "color appearance" (Color Appearance) actually perceived by the observer also differs.

Therefore, an image which can be observed by emitting light (self-emission), such as a soft copy image such as a display image output from a CRT monitor 42 which is a self-luminous device, is displayed on the device ( In this case, the color appearance differs depending on the difference in the chromaticity point of the white point (the brightest point) of the CRT monitor 42). This is because human vision tends to adapt to both ambient light and the white point of self-luminous devices.

FIG. 41 shows a configuration example of another conventional image processing system.

In FIG. 41, an image of a predetermined document taken in by the scanner 502 is taken as RGB data as DDC data and supplied to the converter 513 of the image processing unit 511 as CMS. The converter 513 converts the input RGB data into XYZ data as DIC data, and converts the RGB data into PCS (Profile ConnectionSp
ace) 514.

Similarly, an image displayed on the CRT 501 is captured as RGB data, input to the converter 512 of the image processing unit 511, converted into XYZ data, and then supplied to the PCS 514. . The converter 512 converts the XYZ data input from the PCS 514 into RGB data, outputs the RGB data to the CRT 501, and displays the data.

The converter 515 converts the XYZ data supplied from the PCS 514 into, for example, CMY (K) data as DDC data, outputs it to the printer 503, and prints it on a predetermined print sheet.

Next, the operation will be described with reference to FIG. FIG. 42 shows that the image captured by the scanner 502 is printed by the printer 503 and the CRT is displayed.
A case in which the image is displayed on a screen 501 is shown.

That is, the RGB image data read from the original by the scanner 502 is converted into XYZ data by the converter 513 and then supplied to the PCS 514. The converter 515 converts the XYZ data input from the PCS 514 into CMY
(K) data (K (black) may not exist) and output to the printer 503. The printer 503 prints an image corresponding to the input CMY (K) data on print paper.

The converter 512 converts the XYZ data supplied from the PCS 514 into RGB data, and outputs the RGB data to the CRT 1 for display.

As described above, in this image processing system, image data dependent on the device, which is captured by a predetermined device, is once converted into image data independent of the device by the converter. And
The output-side converter again converts the data into data dependent on the device and outputs the converted data. Therefore, by adjusting the converter, the colorimetric values of the input or output images can be matched in each device.

It should be noted that the same result can be obtained wherever the conversion process is performed. That is, as shown in FIG. 43, the image data I _in and the device profile data D _in
Was supplied to the converter 602 of the image processing unit 601, wherein generating the image data I 'device independent, which is supplied to the converter 604 of the image processing section 603, in this converter 604, the device profile data D _out And the image data _Iout can be obtained.

Further, as shown in FIG.
11, the input image data I _in and the device profile data D _in are transmitted to the image processing unit 612 as they are, and the converter 61 of the image processing unit 612
3, image data I _in and device profile data D
_in , and device-independent image data I ′ is generated.
In the converter 614, the device profile data _Dout is operated to obtain the image data _Iout .

Further, as shown in FIG. 45, the image data I _in and the device profile data D _in are supplied to the converter 622 of the image processing unit 621 to generate device-independent image data I ′. The data may be supplied to the converter 623 of the unit 621, where the device profile data D _out is applied to the input image data I ′ to obtain the image data I _out . In this case, the image processing unit 624 supplies the device profile D _out to the image processing unit 621, receives the supply of the image data I _out output from the image processing unit 621, and outputs this as it is.

[0032]

By the way, for example, between two devices connected via a network,
When transmitting image information, the viewing environment in which these two devices are installed is often different from each other. Therefore, there is a problem that the color appearance (Color Appearance) of an image displayed and output in these two devices may be different.

For example, as shown in FIG.
Assume that a soft copy image is displayed on A. When the color temperature of the ambient light is 4150K (F6) and the luminance is 100 cd / m ² , the image displayed on the CRT 501A is under the same visual environment via the image processing unit 531. When supplied to another CRT 501B and displayed, the color temperature of the CRT 501A is 6500K, the luminance is 100 cd / m ² , and the color temperature of the CRT 501B is 930.
If it is 0K and the luminance is 120 cd / m ² , since the color temperature and the luminance of each CRT are different, the appearance of the image displayed on the CRT 501A does not match the appearance of the image displayed on the CRT 501B. It will be.

Conversely, as shown in FIG.
The color temperature of the RT501B is 500K and the luminance is 80 cd / m ² , and even if the CRT501B is the same,
Assuming that the color temperature of the ambient light of A is 4150K (F6), the luminance is 100 cd / m ² , the color temperature of the ambient light of CRT 501B is 6500 K (D65), and the luminance is 150 cd / m ² , The appearance of the two images does not match.

Further, as shown in FIG.
Is captured and supplied to the printer 503 to be printed as a hard copy image on print paper.
(F6), the brightness is 100 cd / m ² , the color temperature of the ambient light of the printer 503 is 6500 K (D65), and the brightness is 150 cd / m ² , the two images have the same appearance. do not do.

The present invention has been made in view of such a situation. For example, in an image processing system connected via a network, the same color appearance is realized regardless of a difference in visual environment. Is what you do. Further, it is possible to easily realize only the same color using an existing system regardless of the difference in the visual environment.

[0037]

According to a first aspect of the present invention, there is provided a transmitting apparatus comprising: input means for inputting parameters of a visual environment for observing an image input from an input device; A conversion unit that converts image data input by the input device into appearance index data corresponding to a color appearance under a visual environment in accordance with the parameter; and outputs the appearance index data output from the conversion unit via a transmission medium. Transmission means for transmitting the data.

According to a fifth aspect of the present invention, in the transmission method, an input step is performed in which parameters of a visual environment for observing an image input from an input device are input, and the input is performed according to the parameters of the visual environment input in the input step. A conversion step of converting image data input by the device into appearance index data corresponding to a color appearance under a visual environment, and a transmission step of transmitting appearance index data output from the conversion step via a transmission medium; and It is characterized by having.

According to a sixth aspect of the present invention, there is provided a computer program for use in a transmission apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium. An input step in which a parameter of a visual environment for observing an image input from is input, and according to the parameter of the visual environment input from the input step, image data input by the input device,
To provide a computer program comprising: a conversion step of converting into visual index data corresponding to a color appearance under a visual environment; and a transmitting step of transmitting, via a transmission medium, visual index data output from the conversion step. It is characterized by.

According to a seventh aspect of the present invention, there is provided the transmitting apparatus, wherein input means for inputting a parameter of a visual environment for observing an image input from the input device, and inputting in accordance with the parameter of the visual environment input from the input means. First conversion means for converting image data input by the device into appearance index data corresponding to color appearance under the visual environment, receiving means for receiving parameters of the visual environment on the receiving side, and receiving by the receiving means The index data is converted so that the color appearance of the image output by the output device on the reception side matches the color appearance of the image input from the input device according to the parameters of the viewing environment of the reception side. 2 conversion means, and transmission means for transmitting data output from the second conversion means via a transmission medium.

According to the transmission method of the present invention, the input step is a step of inputting a parameter of a visual environment for observing an image input from an input device, and the input is performed according to the parameter of the visual environment input from the input step. A first conversion step of converting image data input by the device into index data of appearance corresponding to a color appearance under a visual environment, and a receiving step of receiving parameters of a visual environment on a receiving side;
Index data such that the color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device according to the parameters of the visual environment of the receiving side received in the receiving step. And a transmission step of transmitting data output from the second conversion step via a transmission medium.

According to a ninth aspect of the present invention, there is provided a computer-readable storage medium which is a computer program used for a transmission apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium. An input step in which a parameter of a visual environment for observing an image input from is input, and according to the parameter of the visual environment input from the input step, image data input by an input device,
A first conversion step of converting into visual index data corresponding to a color appearance under the visual environment, a receiving step of receiving parameters of the visual environment of the receiving side, A second conversion step of converting the index data according to the parameter such that the color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device; Transmitting the data output from the converting step via a transmission medium.

According to a tenth aspect of the present invention, there is provided the transmitting apparatus, wherein: input means for inputting a parameter of a visual environment for observing an image input from the input device; an image input from the input device; Transmitting means for transmitting the parameters of the visual environment.

[0044] According to the transmission method of the present invention, an input step of inputting a parameter of a visual environment for observing an image input from the input device, an image input from the input device, and an input from the input step. And transmitting a parameter of the visual environment.

[0045] The providing medium according to claim 12 is a computer program used for a transmitting apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium. Computer program comprising: an input step in which a parameter of a visual environment for observing an image input from a device is input; an image input from an input device; and a transmitting step of transmitting the parameter of the visual environment input from the input step. Is provided.

According to a thirteenth aspect of the present invention, there is provided a receiving device for receiving image data transmitted from a transmitting side, and an inputting device for inputting a parameter of a visual environment for observing an image displayed and output on an output device. And, according to the parameters of the visual environment input from the input means, so that the color appearance of the image displayed and output to the output device matches the color appearance of the image input from the input device on the transmission side, Converting means for converting the image data received by the receiving means;
Output means for outputting the image data converted by the conversion means to an output device.

A receiving method according to a seventeenth aspect is a receiving step of receiving image data transmitted from a transmitting side, and an inputting step of inputting parameters of a visual environment for observing an image displayed and output on an output device. And, according to the parameters of the visual environment input from the input step, so that the color appearance of the image displayed and output to the output device matches the color appearance of the image input from the input device on the transmission side, The image processing apparatus further includes a conversion step of converting the image data received by the reception step, and an output step of outputting the image data converted by the conversion step to an output device.

[0048] The providing medium according to claim 18 receives image data input from an input device on the transmitting side, converted according to the parameters of the viewing environment on the transmitting side, and transmitted. A computer program used for a display device for displaying and outputting, wherein a receiving step of receiving image data transmitted from a transmitting side and an input step of inputting a parameter of a visual environment for observing an image displayed and output on an output device And, according to the parameters of the visual environment input from the input step, so that the color appearance of the image displayed and output to the output device matches the color appearance of the image input from the input device on the transmission side, A converting step of converting the image data received by the receiving step; and outputting the image data converted by the converting step to an output device. And providing a computer program and an output step of and output.

According to a nineteenth aspect of the present invention, there is provided the receiving apparatus, wherein input means for inputting a parameter of a visual environment for observing an image displayed and output on an output device, and a parameter of the visual environment input from the input means are transmitted to the transmitting side. It is characterized by comprising transmitting means for transmitting, receiving means for receiving image data transmitted from the transmitting side, and output means for outputting the image data received by the receiving means to an output device.

According to a twentieth aspect of the present invention, in the receiving method, an input step of inputting a parameter of a visual environment for observing an image displayed and output on an output device, and transmitting a parameter of the visual environment input from the input step to a transmitting side. The method includes a transmitting step of transmitting, a receiving step of receiving image data transmitted from the transmitting side, and an output step of outputting the image data received in the receiving step to an output device.

According to a twenty-first aspect of the present invention, there is provided an image input from an input device on a transmission side, and converted and transmitted according to parameters of a viewing environment on a transmission side and parameters of a viewing environment on a reception side. A computer program for use in a receiving device that receives data and displays and outputs the data to an output device, comprising: an input step in which a parameter of a visual environment for observing an image displayed and output to the output device is input; Transmitting the transmitted visual environment parameters to the transmitting side, receiving the image data transmitted from the transmitting side, and outputting the image data received by the receiving step to an output device. And a computer program comprising:

According to a twenty-second aspect of the present invention, a receiving device receives image data transmitted from a transmitting side and a parameter of a visual environment of the transmitting side, and responds to a parameter of a visual environment received by the receiving unit. First conversion means for converting image data into visual index data corresponding to color appearance under a visual environment, and an input for inputting visual environment parameters for observing an image displayed and output on an output device. Means, and index data such that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side in accordance with the parameters of the visual environment input from the input means. , And output means for outputting image data obtained by the second conversion means to an output device.

According to a twenty-third aspect of the present invention, there is provided a receiving method, comprising: a receiving step of receiving image data transmitted from a transmitting side and a visual environment parameter of the transmitting side; A first conversion step of converting image data into appearance index data corresponding to a color appearance under a visual environment, and inputting a visual environment parameter for observing an image displayed and output on an output device. Step, and index data such that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side according to the parameters of the visual environment input from the input step. And an output step of outputting image data obtained by the second conversion step to an output device. And wherein the door.

According to a twenty-fourth aspect of the present invention, there is provided a medium for transmitting image data transmitted from a transmission-side input device and parameters of a visual environment for observing an image input from the input device. A computer program for use in a receiving apparatus for receiving and displaying and outputting to an output device, wherein the receiving step includes receiving image data transmitted from a transmitting side and parameters of a viewing environment of the transmitting side, and receiving the data by a receiving step. A first conversion step of converting image data into appearance index data corresponding to a color appearance under the visual environment in accordance with the parameters of the visual environment, and a visual observation for observing an image displayed and output on an output device. According to the input step in which the parameters of the environment are input, and the parameters of the visual environment input from the input step,
A second conversion step of converting the index data so that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side;
And outputting the image data obtained by the converting step to an output device.

An image processing system according to claim 25 is
A first input unit for inputting a parameter of a visual environment for observing an image input from the input device by the transmitting side, and the input device inputs in accordance with a parameter of the visual environment input from the first input unit. A first conversion unit that converts image data into appearance index data corresponding to a color appearance under a visual environment, and a transmission that transmits the appearance index data output from the first conversion unit via a transmission medium. Receiving means for receiving the index data transmitted via the transmission medium, and a second parameter in which a parameter of a visual environment for observing an image displayed and output to the output device is input. According to the input means and the parameters of the visual environment input from the second input means, the color appearance of the image displayed and output on the output device is determined based on the image input from the input device on the transmission side. A second conversion unit for converting the index data received by the reception unit so as to match the appearance of the image data, and an output unit for outputting the image data converted by the second conversion unit to an output device. It is characterized by the following.

In the image processing method according to the twenty-sixth aspect, the transmitting side includes a first input step of inputting a parameter of a visual environment for observing an image, and a visual environment parameter input from the first input step. A first conversion step of converting image data input by the input device into appearance index data corresponding to a color appearance under a visual environment,
A transmitting step of transmitting, via a transmission medium, visible index data output from the first conversion step, wherein a receiving side receives the index data transmitted via the transmission medium, and an output device A second input step in which a parameter of a viewing environment for observing an image displayed and output to the input device is output to an output device according to the parameter of the viewing environment input from the second input step. A second conversion step of converting the index data received by the receiving step so that the color appearance of the image matches the color appearance of the image input from the input device on the transmission side, and a second conversion step And outputting to the output device the image data converted by the above.

According to a twenty-seventh aspect, in the providing medium, the transmitting side performs a predetermined conversion on the image input from the input device, transmits the image via the transmission medium, and
A computer program used in an image processing system for performing a predetermined conversion on an image transmitted via a transmission medium and then displaying the image on an output device, wherein the program on the transmission side is a visual environment for observing the image. A first input step in which the parameters are input, and image data input by the input device according to the parameters of the visual environment input from the first input step. And a transmitting step of transmitting the apparent index data output from the first converting step via a transmission medium, wherein the program on the receiving side is transmitted via the transmission medium. A receiving step of receiving the transmitted index data and a parameter of a visual environment for observing an image displayed and output to an output device. A second input step to be a second
According to the parameters of the visual environment input from the input step, the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device on the transmission side. A computer program comprising: a second conversion step of converting the index data received by the step; and an output step of outputting the image data converted by the second conversion step to an output device. I do.

An image processing system according to claim 28 is
A first input unit for inputting a parameter of a visual environment for observing an image input from the input device by the transmitting side, and the input device inputs according to the parameter of the visual environment input from the first input unit. First conversion means for converting image data into visual index data corresponding to color appearance under a visual environment, and receiving a visual environment parameter of a receiving side for observing an image displayed and output to an output device; A first receiving unit configured to display a color appearance of an image displayed and output on an output device according to a parameter of a visual environment received by the first receiving unit; A second conversion unit for converting the index data output from the first conversion unit so as to match the first conversion unit, and a first transmission unit for transmitting the data obtained by the second conversion unit via a transmission medium. Means, wherein the receiving side receives data transmitted via the transmission medium, and second means for outputting data received by the second receiving means to an output device. A second input unit configured to input a parameter of a viewing environment for observing an image displayed and output to the output device; and a second unit configured to transmit a parameter of the viewing environment input from the second input unit to a transmission side. 2 transmission means.

According to the image processing method of the present invention, the transmitting side inputs the parameters of the visual environment for observing the image input from the input device from the first input step and the first input step. A first conversion step of converting image data input by the input device into appearance index data corresponding to a color appearance under the visual environment in accordance with the parameters of the visual environment, and displaying and outputting the index data to an output device. A first receiving step of receiving a parameter of a viewing environment of a receiving side for observing an image to be viewed, and a color appearance of an image displayed and output on an output device according to a parameter of a viewing environment received by the receiving step. A second conversion step of converting the index data output from the first conversion step so as to match the color appearance of the image input from the input device; A first transmitting step of transmitting the data output from the second converting step via a transmission medium, wherein the receiving side receives the data transmitted via the transmitting medium; An output step of outputting data received by the receiving step 2 to an output device; a second input step of inputting a parameter of a visual environment for observing an image displayed and output to the output device; Transmitting the parameters of the visual environment input from the input step 2 to the transmitting side;
And a transmission step.

[0060] In the providing medium according to claim 30, the transmitting side performs a predetermined conversion on the image input from the input device and transmits the image via the transmission medium.
A computer program used for an image processing system that displays and outputs an image transmitted via a transmission medium to an output device, wherein a program on a transmission side includes a parameter of a visual environment for observing an image input from the input device. The image data input by the input device is converted into visual index data corresponding to the color appearance under the visual environment according to the first input step and the visual environment parameters input from the first input step. A first converting step of converting, a first receiving step of receiving a parameter of a viewing environment of a receiving side for observing an image displayed and output to the output device, and a parameter of the viewing environment received by the receiving step. Accordingly, the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device. As a second conversion step of converting the outputted index data from the first conversion step,
And a first transmission step of transmitting the data output from the second conversion step via a transmission medium. Step, an output step of outputting data received in the second receiving step to an output device, and a second parameter in which a visual environment parameter for observing an image displayed and output to the output device is input.
, And a second transmission step of transmitting the parameters of the visual environment input from the second input step to the transmission side.

An image processing system according to claim 31 is
A first input unit for inputting a parameter of a visual environment in which a transmitting side observes an image input from the input device; an image input from the input device; and a parameter of a visual environment input from the first input unit Transmitting means for transmitting the image data transmitted from the transmitting side and the parameters of the visual environment of the transmitting side, and receiving means for receiving the parameters of the visual environment received by the receiving means. A first conversion unit that converts the image data into appearance index data corresponding to a color appearance under the visual environment, and a second input unit in which parameters of a visual environment for observing an image displayed and output on an output device are input. The color appearance of the image output from the output device is input from the input device on the transmission side in accordance with the parameters of the visual environment input from the second input device and the second input device. A second conversion unit that converts the index data so as to match the color appearance of the image; and an output unit that outputs the image data obtained by the second conversion unit to an output device. I do.

The image processing method according to claim 32, wherein the transmitting side inputs a parameter of a visual environment for observing an image input from the input device, a first input step, and an image input from the input device. A transmitting step of transmitting the parameters of the visual environment input from the first input step, wherein the receiving side receives the image data transmitted from the transmitting side and the parameters of the visual environment of the transmitting side. Converting the image data into appearance index data corresponding to the color appearance under the visual environment in accordance with the visual environment parameters received in the receiving step.
, A second input step in which parameters of a visual environment for observing an image displayed and output on an output device are input, and an output device in accordance with the parameters of the visual environment input from the second input step. Is used to convert the index data so that the color appearance of the image output from the input device matches the color appearance of the image input from the input device on the transmission side.
And an output step of outputting the image data obtained by the second conversion step to an output device.

According to a third aspect of the present invention, the transmitting side transmits an image input from the input device via a transmission medium, and the receiving side transmits a predetermined image to the image transmitted via the transmission medium. A computer program for use in an image processing system that performs a conversion on a display device and displays the image on an output device. And a transmitting step of transmitting an image input from the input device and a parameter of the visual environment input from the first input step, wherein the program on the receiving side includes image data transmitted from the transmitting side. Receiving step of receiving and the parameters of the viewing environment of the transmitting side, and image data according to the parameters of the viewing environment received by the receiving step. A first conversion step of converting into index data of appearance corresponding to a color appearance under a viewing environment of a transmitting side, and a second conversion step of inputting a parameter of a viewing environment for observing an image displayed and output on an output device. According to the input step and the parameters of the visual environment input from the second input step, the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side. A computer program comprising a second conversion step of converting index data as described above and an output step of outputting image data obtained by the second conversion step to an output device.

The image data processing apparatus according to the thirty-fourth aspect converts the DDC image data into the DIC image data or the DI data.
Corresponds to first capturing means for capturing a profile for converting the image data of C into image data of DDC, second capturing means for capturing visual environment parameters, and viewing environment parameters captured by the second capturing means. And a rewriting means for rewriting the profile fetched by the first fetching means.

The image data processing method according to claim 37, wherein the DDC image data is converted into the DIC image data,
A first capturing step for capturing a profile for converting the image data of C into image data of DDC, a second capturing step for capturing the visual environment parameters, and corresponding to the visual environment parameters captured in the second capturing step. And a rewriting step of rewriting the profile fetched in the first fetching step.

A first capturing step of capturing a profile for converting DDC image data into DIC image data, or DIC image data into DDC image data, , A second capturing step of capturing the visual environment parameters, and corresponding to the visual environment parameters captured in the second capturing step,
A rewriting step of rewriting the profile captured in the first capturing step.

In the transmitting apparatus according to the first aspect, a parameter of a visual environment for observing an image input from the input device is input from the input means, and the input is performed according to the parameter of the visual environment input from the input means. The conversion unit converts the image data input by the device into appearance index data corresponding to the color appearance under the visual environment, and the transmission unit transmits the appearance index data output from the conversion unit via the transmission medium. .

For example, a parameter of a visual environment for observing an image input from a CRT monitor as an input device is input from the input means, and is input from the input means.
The conversion means converts the data output from the CRT monitor into appearance index data corresponding to the color appearance under the visual environment according to data such as the brightness of the ambient light, and the appearance index data obtained by the conversion means. Is transmitted to a transmission medium such as a network.

[0069] The transmission method according to claim 5 and claim 6.
In the providing medium described in the above, the parameters of the visual environment for observing the image input from the input device are input from the input step, and the image data input by the input device according to the parameters of the visual environment input from the input step Is converted into appearance index data corresponding to the color appearance under the visual environment, and the transmission step transmits the appearance index data output from the conversion step via the transmission medium.

For example, parameters of a visual environment for observing an image input from a CRT monitor as an input device are input from the input step, and input from the input step.
For example, the conversion step converts the data output from the CRT monitor into appearance index data corresponding to the color appearance under the visual environment in accordance with data such as the brightness of the ambient light. The transmitting step transmits the index data to a transmission medium such as a network.

In the transmitting apparatus according to the present invention, the parameters of the visual environment for observing the image input from the input device are input from the input means, and the input parameters are set according to the parameters of the visual environment input from the input means. The first conversion means converts the image data input by the device into visual index data corresponding to the color appearance under the visual environment, and the receiving means receives the parameters of the visual environment on the receiving side, and receives the parameters by the receiving means. In accordance with the parameters of the viewing environment on the receiving side, the index data is set to the second data such that the color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device. The conversion means converts the data, and the transmission means transmits the data output from the second conversion means via the transmission medium.

For example, parameters of a viewing environment for observing an image input from a CRT monitor as an input device are input from input means, and input from the input means.
The first conversion means converts the data output from the CRT monitor into appearance index data corresponding to the color appearance under the visual environment according to data such as the brightness of the ambient light, and transmitted from the receiving side. The receiving means receives the parameters of the viewing environment, and according to the parameters of the viewing environment of the receiving side received by the receiving means, the color appearance of the image output by the CRT monitor which is the output device of the receiving side is changed by the transmitting side. The index data is converted by the second conversion means so as to match the color appearance of the image input from the CRT monitor which is an input device, and the data obtained by the second conversion means is transmitted by a network or the like. Send to media.

The transmission method according to claim 8 and claim 9
In the providing medium described in the above, the parameters of the viewing environment for observing the image input from the input device are input from the input step, and the image data input by the input device according to the parameters of the viewing environment input from the input step Is converted into visual index data corresponding to the color appearance under the visual environment by the first converting step, the receiving step receives the parameters of the visual environment of the receiving side, and the receiving side receives the visual parameters of the receiving side. The second conversion step converts the index data so that the color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device, according to the parameters of the environment, The transmitting step transmits the data output from the second converting step via the transmission medium.

For example, parameters of a viewing environment for observing an image input from a CRT monitor as an input device are input from the input step, and input from the input step.
For example, the first conversion step converts RGB data output from the CRT monitor into appearance index data corresponding to the color appearance under the visual environment according to data such as the brightness of ambient light, and transmits the data from the reception side. The receiving step receives the parameters of the visual environment that has been performed, and according to the parameters of the visual environment of the receiving side received by the receiving step, the color appearance of the image output by the CRT monitor that is the output device of the receiving side, The index data is converted to the second color so that it matches the color appearance of the image input from the CRT monitor which is the input device on the transmitting side.
And the transmitting step sends the data obtained by the second converting step to a transmission medium such as a network.

In the transmitting device according to the tenth aspect,
A parameter of a viewing environment for observing an image input from the input device is input from the input unit, and the transmitting unit transmits the image input from the input device and the parameter of the viewing environment input from the input unit. For example, a visual environment parameter such as the brightness of ambient light, which is a visual environment for observing a CRT monitor as an input device, is input from an input unit, and image data input from the CRT monitor as an input device and input from the input unit. And the parameters of the visual environment
Transmission means transmits the data to a transmission medium such as a network.

In the transmission method according to the eleventh aspect and the providing medium according to the twelfth aspect, parameters of a visual environment for observing an image input from the input device are input from the input step, and are input from the input device. The transmitting step transmits the image and the parameters of the visual environment input from the input step. For example, a visual environment parameter such as the brightness of ambient light, which is a visual environment for observing a CRT monitor as an input device, is input from an input step, and image data input from a CRT monitor as an input device and input from an input step. The transmitting step transmits the set parameters of the visual environment to a transmission medium such as a network.

In the receiver according to the thirteenth aspect,
The receiving means receives the image data transmitted from the transmitting side, and the parameters of the visual environment for observing the image displayed and output on the output device are input from the input means, and are based on the parameters of the visual environment input from the input means. Thus, the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device on the transmission side,
The conversion means converts the image data received by the reception means, and the output means outputs the image data converted by the conversion means to an output device.

For example, the receiving means receives the image data transmitted from the transmitting side and outputs the image data on the receiving side.
The brightness of the ambient light, which is a parameter of the visual environment for observing the CRT monitor, is input from the input means, and according to the parameter of the visual environment input from the input means, the color appearance of the image displayed on the CRT monitor is Input device on the sending side
The conversion means converts the image data received by the reception means so as to match the color appearance of the image displayed on the CRT monitor, and converts the obtained image data to a CRT which is an output device.
Output means outputs to the monitor.

In the receiving method according to the seventeenth aspect and the providing medium according to the eighteenth aspect, the receiving step receives the image data transmitted from the transmitting side, and observes the image displayed and output on the output device. The parameters of the visual environment are input from the input step, and the color appearance of the image displayed and output on the output device is changed according to the parameters of the visual environment input from the input step. The conversion step converts the image data received by the reception step so as to match the color appearance, and the output step outputs the image data converted by the conversion step to an output device.

For example, the receiving step receives the image data transmitted from the transmitting side, and receives from the inputting step the luminance of the ambient light and the like, which are parameters of the visual environment for observing the CRT monitor as the output device on the receiving side. CRT according to the visual environment parameters input from the input step
The converting step converts the image data received by the receiving step so that the color appearance of the image displayed on the monitor matches the color appearance of the image displayed on the CRT monitor which is the input device on the transmitting side. The output step outputs the obtained image data to a CRT monitor as an output device.

In the receiver according to the nineteenth aspect,
A parameter of a visual environment for observing an image displayed and output on the output device is input from the input unit, and the transmitting unit transmits the parameter of the visual environment input from the input unit to the transmitting side, and the image transmitted from the transmitting side. The receiving means receives the data, and the output means outputs the image data received by the receiving means to an output device.

For example, parameters of a visual environment for observing an image displayed and output on a CRT monitor, which is an output device, for example, luminance of ambient light, etc., are input from the input means, and the input parameters of the visual environment are transmitted. The transmitting means transmits the image data transmitted from the transmitting side to the transmitting side, and after a predetermined correction process is performed in accordance with the parameters of the transmitted visual environment, the receiving means receives the image data transmitted from the transmitting side. The output means outputs the data to the CRT monitor.

In the receiving method according to the twentieth aspect and the providing medium according to the twenty-first aspect, parameters of a visual environment for observing an image displayed and output on the output device are input from the input step and input from the input step. The transmitting step transmits the parameters of the visual environment to the transmitting side, the receiving step receives the image data transmitted from the transmitting side, and the output step outputs the image data received by the receiving step to an output device. . For example, it is a parameter of a visual environment for observing an image displayed and output on a CRT monitor that is an output device.

For example, the luminance of the ambient light and the like are input from the input step, and the input visual environment parameters are transmitted to the transmitting side in the transmitting step. Is performed, the receiving step receives the image data transmitted from the transmitting side, and the output step outputs the received image data to the CRT monitor.

[0085] In the receiving apparatus according to the twenty-second aspect,
The receiving unit receives the image data transmitted from the transmitting side and the parameters of the viewing environment of the transmitting side, and according to the parameters of the viewing environment received by the receiving unit, the image data,
The first conversion unit converts the index data into the appearance index data corresponding to the color appearance under the visual environment, and the parameters of the visual environment for observing the image displayed and output on the output device are input from the input unit, and are input from the input unit. Depending on the parameters of the visual environment, the color appearance of the image output by the output device
The index data is converted by the second conversion means so as to match the color appearance of the image input from the input device on the transmission side, and the image data obtained by the second conversion means is output to the output device. Means output.

For example, the image data transmitted from the transmitting side and the parameters of the viewing environment of the transmitting side, for example,
The receiving means receives the brightness of the ambient light, etc., and transmits the image data according to the received visual environment parameters to the CRT on the transmitting side.
The first conversion means converts the color appearance index data corresponding to the color appearance in the viewing environment for viewing the monitor, and the ambient light of the viewing environment for viewing the image displayed and output on the CRT monitor which is the output device on the receiving side. Parameters such as brightness are input from the input means, and according to the input visual environment parameters, the color appearance of the image output by the CRT monitor as the output device is input from the CRT monitor as the input device on the transmission side. The index data is converted by the second conversion means so as to match the color appearance of the image, and the output means outputs the image data obtained by the second conversion means to a CRT monitor as an output device.

In the receiving method according to the twenty-third aspect and the providing medium according to the twenty-fourth aspect, the receiving step receives the image data transmitted from the transmitting side and the parameters of the viewing environment of the transmitting side. The first conversion step converts the image data into visual index data corresponding to the color appearance under the visual environment in accordance with the visual environment parameters received by the first step, and observes the image displayed and output on the output device. The parameters of the visual environment to be input are input from the input step, and according to the parameters of the visual environment input from the input step, the color appearance of the image output from the output device is changed to the color of the image input from the input device on the transmission side. The index data is converted by the second conversion step so as to match the appearance of the image data, and the image data obtained by the second conversion step is output to the output device. Output step Te is output.

For example, the receiving step receives the image data transmitted from the transmission side and the parameters of the viewing environment of the transmission side, and converts the image data into the CRT of the transmission side according to the received parameters of the viewing environment. The first conversion step converts the color appearance index data corresponding to the color appearance in the viewing environment for viewing the monitor, and converts the ambient light of the viewing environment for viewing the image displayed and output on the CRT monitor, which is the output device on the receiving side. Parameters such as luminance are input from the input step, and according to the input visual environment parameters, the color appearance of the image output by the CRT monitor as the output device is input from the CRT monitor as the input device on the transmission side. The index data is converted by the second conversion step so as to match the color appearance of the image to be output, and the image data obtained by the second conversion step is output to a CRT as an output device. Output step outputs to Nita.

In the image processing system according to the twenty-fifth aspect, on the transmitting side, a parameter of a visual environment for observing an image input from the input device is input from the first input means, and is input from the first input means. Image data input by the input device according to the parameters of the viewing environment
The first conversion unit converts the index data into appearance index data corresponding to the color appearance under the visual environment, and the transmission unit transmits the appearance index data output from the first conversion unit via a transmission medium. On the side, the receiving means receives the index data transmitted via the transmission medium, and the parameter of the visual environment for observing the image displayed and output to the output device is set to the second.
The color appearance of the image displayed and output on the output device is changed according to the parameter of the visual environment input from the input means of the second input means. The index data received by the receiving means is converted by the second converting means so as to match the appearance of the image data, and the image data converted by the second converting means is output to the output device by the output means.

For example, on the transmitting side, it is an input device.
Data such as, for example, the brightness of ambient light, which is a parameter of the visual environment for observing the CRT monitor, is input from the first input means, and the CRT monitor, which is an input device, is input according to the input visual environment parameter. Image data to be
The conversion means converts the appearance index data corresponding to the color appearance under the visual environment, and the transmission means transmits the obtained data via a network or the like, and the reception side has been transmitted via the network. The index data is received by the receiving means, and parameters of a visual environment for observing an image displayed and output on a CRT monitor as an output device, for example, data such as the brightness of ambient light are input from the second input means. In accordance with the input visual environment parameters, the color appearance of the image displayed and output on the CRT monitor as the output device is changed to the color appearance of the image input from the input device or the CRT monitor on the transmitting side. The received index data is converted by the second conversion means so that the index data matches the image data, and the image data converted by the second conversion means is output to the output device CR.
The output means outputs to the T monitor.

In the image processing method according to the twenty-sixth aspect and the providing medium according to the twenty-seventh aspect, on the transmitting side, parameters of a visual environment for observing an image input from the input device are input from the first input step. And according to the parameters of the visual environment input from the first input step,
The first conversion step converts the image data input by the input device into appearance index data corresponding to the color appearance under the visual environment, and transmits the appearance index data output from the first conversion step to a transmission medium. The receiving step receives the index data transmitted via the transmission medium on the receiving side, and the parameter of the visual environment for observing the image displayed and output to the output device is set to the second. The color appearance of the image displayed and output on the output device is changed according to the parameter of the visual environment input from the input step of the second input step. The index data received by the receiving step is converted by the second converting step so as to match the appearance of the image data, and the image data converted by the second converting step is converted. Output step outputs to the force devices.

For example, on the transmitting side, it is an input device.
The parameters of the visual environment for observing the CRT monitor, for example, data such as the brightness of the ambient light is input from the first input step, according to the input parameters of the visual environment,
The first conversion step converts the RGB data input by the CRT monitor, which is an input device, into appearance index data corresponding to the color appearance under the visual environment, and the transmission step transmits the obtained data via a network or the like. On the receiving side, the receiving step receives the index data transmitted via the network, and is a parameter of a visual environment for observing an image displayed and output on a CRT monitor as an output device. Data such as light intensity is the second
The color appearance of the image displayed and output on the CRT monitor as the output device is input from the input device or the CRT monitor on the transmission side according to the input visual environment parameters. The second conversion step converts the received index data so as to match the color appearance of the image, and outputs the image data converted by the second conversion step to a CRT monitor as an output device. Output.

In the image processing system according to the twenty-eighth aspect, on the transmitting side, a parameter of a visual environment for observing an image input from the input device is input from the first input means, and is input from the first input means. Image data input by the input device according to the parameters of the viewing environment
The first conversion means converts the index into visual index data corresponding to the color appearance under the visual environment, and sets the parameters of the visual environment on the receiving side for observing the image displayed and output to the output device by the first receiving means. Is received, and the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device according to the parameters of the visual environment received by the first receiving means. The second conversion means converts the index data output from the first conversion means, and the first transmission means transmits the data obtained by the second conversion means via a transmission medium. The second receiving means receives data transmitted via the transmission medium, outputs the data received by the second receiving means to an output device, and displays the data on the output device. Output image Parameters observation viewing environment is input from the second input means, second transmission means for transmitting the parameter of the input viewing environment than the second input means to the transmitting side.

For example, on the transmitting side, it is an input device.
A parameter of a viewing environment for observing an image input from the CRT monitor, for example, data such as the brightness of ambient light is input from the first input unit, and is input to the input device in accordance with the input viewing environment parameter. The first conversion means converts image data input by a certain CRT monitor into appearance index data corresponding to color appearance under a visual environment, and displays and outputs the same to a CRT monitor which is an output device on the receiving side. The first receiving means receives the parameters of the viewing environment on the receiving side for observing the image, and receives the parameters on the receiving side according to the received viewing environment parameters such as the brightness of ambient light on the receiving side. The index data output from the first conversion means is output so that the color appearance of the image displayed and output on a certain CRT monitor matches the color appearance of the image input from the CRT monitor which is the input device on the transmitting side. Data is converted by the second converting means, the obtained data is transmitted by the first transmitting means via the network, and on the receiving side, the data transmitted via the network is received by the second receiving means. Then, the output means outputs the received data to a CRT monitor which is an output device on the receiving side, and is a parameter of a visual environment for observing an image displayed and output to the output device, for example, ambient light. Data such as luminance is input from the second input means, and the input transmission parameters are transmitted to the transmission side by the second transmission means.

[0095] In the image processing method according to claim 29 and the providing medium according to claim 30, on the transmitting side, parameters of a visual environment for observing an image input from the input device are input from the first input step. And according to the parameters of the visual environment input from the first input step,
The first conversion step converts the image data input by the input device into visual index data corresponding to the color appearance under the visual environment, and the receiving side observes the image displayed and output to the output device. An environment parameter is received by a first receiving step, and a color appearance of an image displayed and output on an output device is input from an input device in accordance with the visual environment parameter received in the first receiving step. The index data output from the first conversion step is converted by the second conversion step so as to match the color appearance of the image, and the data obtained by the second conversion step is converted to the first data via the transmission medium by the first conversion step. In the transmitting step, the receiving side receives the data transmitted via the transmission medium in the receiving side, and outputs the data received in the second receiving step. The output step outputs to the device, and the parameter of the visual environment for observing the image displayed and output to the output device is input from the second input step, and the parameter of the visual environment input from the second input step Is transmitted to the transmitting side in the second transmitting step.

For example, on the transmitting side, it is an input device.
A parameter of a visual environment for observing an image input from the CRT monitor, for example, data such as brightness of ambient light is input from the first input step, and according to the input visual environment parameter, data is input by an input device. A first conversion step of converting image data input by a CRT monitor into appearance index data corresponding to color appearance under a visual environment;
The first receiving step receives the parameters of the viewing environment of the receiving side for observing the image displayed and output on the CRT monitor which is the output device of the receiving side, and receives, for example, the brightness of the ambient light of the receiving side. The color appearance of the image displayed and output on the CRT monitor, which is the output device on the receiving side, is the input device on the transmitting side, depending on the visual environment parameters such as
The index data output from the first conversion step is converted by the second conversion step so as to match the color appearance of the image input from the CRT monitor, and the obtained data is converted to the first data via the network by the first conversion step. The transmitting step transmits the data, and the receiving side transmits the data transmitted via the network to the second side.
The receiving step is received, the output step outputs the received data to a CRT monitor which is an output device on the receiving side, and is a parameter of a visual environment for observing an image displayed and output on the output device. For example, data such as the brightness of the ambient light is input from the second input step, and the input transmission environment parameters are transmitted to the transmission side in the second transmission step.

In the image processing system according to the thirty-first aspect, on the transmitting side, a parameter of a visual environment for observing an image input from the input device is input from the first input means, and the image input from the input device is input. And the viewing environment parameter input from the first input unit, and the receiving unit receives the image data transmitted from the transmitting side and the viewing environment parameter on the transmitting side on the receiving side. Then, the first conversion means converts the image data into appearance index data corresponding to the color appearance under the visual environment according to the parameters of the visual environment received by the receiving means, and the display data is output to the output device. The parameter of the visual environment for observing the image to be viewed is input from the second input means, and the output device outputs according to the parameter of the visual environment input from the second input means. The index data is converted by the second converter so that the color appearance of the image matches the color appearance of the image input from the input device on the transmitting side, and the image data obtained by the second converter is The output means outputs to the output device.

For example, on the transmitting side, it is an input device.
For example, brightness data of ambient light, which is a parameter of a visual environment for observing an image input from the CRT monitor, is input from the first input means, and image data input from the CRT monitor as an input device, and The transmission means transmits the data of the visual environment input from the input means of the transmitting means, and the receiving means receives the image data transmitted from the transmitting side and the parameters of the visual environment of the transmitting side on the receiving side, and The first conversion means converts the image data into appearance index data corresponding to the color appearance under the viewing environment of the transmitting side according to the parameters of the viewing environment received by the first conversion means. A parameter of a viewing environment for observing an image displayed and output on the CRT monitor is input from the second input means, and is a parameter of a viewing environment on the receiving side input from the second input means, for example, According to the brightness data of the light, the index data is output so that the color appearance of the image output from the CRT monitor as the output device matches the color appearance of the image input from the CRT monitor as the input device on the transmitting side. The second conversion unit converts the image data and outputs the image data obtained by the second conversion unit to a CRT monitor as an output device.

In the image processing method according to claim 32 and the providing medium according to claim 33, on the transmission side, parameters of a viewing environment for observing an image input from the input device are input from the first input step. The transmitting step transmits an image input from the input device and a parameter of the visual environment input from the first input step,
On the receiving side, the receiving step receives the image data transmitted from the transmitting side and the parameters of the viewing environment of the transmitting side,
The first conversion step converts the image data into appearance index data corresponding to the color appearance under the viewing environment according to the parameters of the viewing environment received by the receiving step,
A parameter of a visual environment for observing an image displayed and output on the output device is input from a second input step, and a color of the image output by the output device according to the visual environment parameter input from the second input step The index data is converted by the second conversion step so that the appearance of the image matches the color appearance of the image input from the input device on the transmission side, and the image data obtained by the second conversion step is output to the output device. In response, the output step outputs.

For example, on the transmitting side, it is an input device.
For example, brightness data of ambient light, which is a parameter of a visual environment for observing an image input from the CRT monitor, is input from a first input step, and image data input from a CRT monitor as an input device, and The transmitting step transmits the visual environment data input from the input step, and the receiving step receives, on the receiving side, the image data transmitted from the transmitting side and the parameters of the visual environment on the transmitting side. The first conversion step converts the image data into appearance index data corresponding to the color appearance under the viewing environment of the transmission side according to the parameters of the viewing environment received by the first conversion step, and is the output device of the reception side. A parameter of a visual environment for observing an image displayed and output on a CRT monitor is input from a second input step, and a visual ring on a receiving side input from the second input step is input. Is a parameter, for example, according to the luminance data of the ambient light is the output device
The second conversion step converts the index data so that the color appearance of the image output from the CRT monitor matches the color appearance of the image input from the CRT monitor which is the input device on the transmission side, The output step outputs the image data obtained by the conversion step to a CRT monitor as an output device.

An image data processing apparatus according to claim 34,
In the image data processing method according to claim 37, and in the providing medium according to claim 38, a profile for converting DDC image data into DIC image data corresponding to the captured visual environment parameters, or A profile for converting DIC image data to DDC image data is rewritten.

[0102]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. In order to clarify the correspondence between each means of the invention described in the claims and the following embodiments, each means is described. When the features of the present invention are described by adding the corresponding embodiment (however, an example) in parentheses after the parentheses, the result is as follows. However, of course, this description does not mean that each means is limited to those described.

The transmitting device according to the first aspect is an input means (for example, sensors S ₁ and S _{2 in} FIG. ₂ ) for inputting parameters of a visual environment for observing an image input from an input device.
Conversion means for converting image data input by the input device into appearance index data corresponding to color appearance under the visual environment in accordance with the visual environment parameters input from the input means (for example, FIG. The visual environment conversion circuit 12) and transmission means (for example, the image editing processing circuit 13 in FIG. 2) for transmitting, via a transmission medium, appearance index data output from the conversion means.

The transmitting device according to claim 7 is an input means for inputting parameters of a visual environment for observing an image input from an input device (for example, sensors S ₁ and S _{2 in} FIG. 9).
And first conversion means for converting image data input by the input device into appearance index data corresponding to color appearance under the visual environment in accordance with the parameters of the visual environment input from the input means (for example, Visual environment conversion circuit 12 in FIG. 9)
Receiving means for receiving parameters of the viewing environment of the receiving side (for example, the viewing environment conversion circuit 15 in FIG. 9), and the parameters of the viewing environment of the receiving side received by the receiving means.
Second conversion means for converting the index data so that the color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device (for example, the visual environment conversion in FIG. 9). Circuit 15) and transmission means (for example, converter 16 in FIG. 9) for transmitting data output from the second conversion means via a transmission medium.

According to a tenth aspect of the present invention, there is provided a transmitting apparatus for inputting a parameter of a visual environment for observing an image input from an input device (for example, the sensors S ₁ and S ₁ shown in FIG. 10).
S ₂ ), transmitting means for transmitting the image input from the input device, and the parameters of the visual environment input from the input means (for example, the CRT 3 in FIG. 10, the image processing unit 1-1, the sensors S ₁ , S ₂ ).

A receiving apparatus according to a thirteenth aspect of the present invention includes a receiving unit (for example, the image editing processing circuit in FIG. 2) for receiving image data transmitted from a transmitting side, and an image displayed and output on an output device. Input means for inputting parameters of the viewing environment to be observed (for example, sensors S ₃ and S _{4 in} FIG. 2)
And, according to the parameters of the visual environment input from the input means, the color appearance of the image displayed and output on the output device,
Conversion means for converting the image data received by the reception means so as to match the color appearance of the image input from the input device on the transmission side (for example, the visual environment conversion circuit 1 in FIG. 2)
5) and output means (for example, the converter 16 in FIG. 2) for outputting the image data converted by the conversion means to an output device.

According to a nineteenth aspect of the present invention, there is provided a receiving apparatus, comprising: input means (for example, sensors S ₃ and S _{4 in} FIG. 11) for inputting parameters of a visual environment for observing an image displayed and output on an output device; Transmission means (for example, sensors S ₃ and S ₄ in FIG. 11) for transmitting the parameters of the visual environment input from the means to the transmission side, and reception means (for example, FIG. 11) for receiving the image data transmitted from the transmission side. 11 converters 1
6) and output means (for example, the converter 16 in FIG. 11) for outputting the image data received by the receiving means to an output device.

The receiving apparatus according to claim 22 is a receiving means for receiving image data transmitted from the transmitting side and parameters of the viewing environment of the transmitting side (for example, the converter 11, the sensors S ₁ and S ₁ in FIG. 10). ₂ ) and first conversion means for converting image data into appearance index data corresponding to the color appearance under the visual environment in accordance with the visual environment parameters received by the receiving means (for example, FIG. A visual environment conversion circuit 12) and input means (for example, a parameter of a visual environment for observing an image displayed and output on an output device) (for example,
According to the sensors S ₃ and S ₄ ) of FIG. 10 and the parameters of the visual environment input from the input means, the color appearance of the image output from the output device is determined by the color of the image input from the input device on the transmission side. Second conversion means (for example, the visual environment conversion circuit 1 shown in FIG. 10) for converting the index data so as to match the appearance of
5) and output means for outputting the image data obtained by the second conversion means to an output device (for example, FIG.
Converter 16).

An image processing system according to claim 25,
The transmitting side receives parameters from a first input unit (for example, sensors S ₁ and S _{2 in} FIG. ₂ ) to which parameters of a visual environment for observing an image input from the input device are input. First conversion means (for example, the visual environment conversion circuit 12 shown in FIG. 2) that converts image data input by the input device into visual index data corresponding to color appearance under the visual environment in accordance with the visual environment parameters. ) And transmission means (for example, the image editing processing circuit 1 shown in FIG. 2) for transmitting, via a transmission medium, appearance index data output from the first conversion means.
3) wherein the receiving side receives the index data transmitted via the transmission medium (for example, the image editing processing circuit 14 in FIG. 2) and the image displayed and output to the output device. Second input means (for example, sensors S ₃ and S _{4 in} FIG. 2) into which parameters of a viewing environment to be observed are input.
And the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device on the transmission side according to the parameters of the visual environment input from the second input means. Thus, the second conversion means (for example, the visual environment conversion circuit 15 in FIG. 2) for converting the index data received by the reception means, and the image data converted by the second conversion means to the output device Output means for outputting (for example, the converter 16 in FIG. 2).

An image processing system according to claim 28 is
The transmitting side receives first input means (for example, sensors S ₁ and S _{2 in} FIG. 11) for inputting parameters of a visual environment for observing an image input from the input device, and input the first input means. First conversion means (for example, the visual environment conversion circuit 12 shown in FIG. 11) that converts image data input by the input device into visual index data corresponding to color appearance under the visual environment in accordance with the visual environment parameters. ) And a first receiving unit (for example, a receiving unit that receives a parameter of a viewing environment on a receiving side that observes an image displayed and output to an output device)
According to the viewing environment conversion circuit 15) of FIG. 11 and the parameters of the viewing environment received by the first receiving unit, the color appearance of the image displayed and output on the output device is changed based on the image input from the input device. The second conversion unit (for example, the visual environment conversion circuit 15 in FIG. 11) that converts the index data output from the first conversion unit so as to match the color appearance is obtained by the second conversion unit. First transmission means (for example, the viewing environment conversion circuit 15 in FIG. 11) for transmitting the transmitted data via the transmission medium, and the receiving side receives the data transmitted via the transmission medium. Receiving means (for example,
An output unit (for example, the converter 16 in FIG. 11) that outputs data received by the second receiving unit to an output device, and an image that is displayed and output to the output device. Second input means (for example, sensors S ₃ and S ₄ in FIG. 11) to which the parameters of the visual environment to be observed are input, and the parameters of the visual environment input from the second input means are transmitted to the transmitting side. (For example, sensors S ₃ and S _{4 in} FIG. 11).

The image processing system according to claim 31 is
A first input unit (for example, sensors S ₁ and S _{2 in} FIG. 10) in which parameters of a visual environment in which a transmitting side observes an image input from the input device are input; an image input from the input device; Transmission means for transmitting the parameters of the visual environment input from the first input means (for example, FIG.
A receiving unit that includes a CRT 3, an image processing unit 1-1, and sensors S ₁ and S ₂ , and the receiving side receives image data transmitted from the transmitting side and parameters of the viewing environment of the transmitting side (for example, FIG. 10 converter 11, visual environment conversion circuit 12)
And first conversion means for converting image data into appearance index data corresponding to the color appearance under the viewing environment of the transmitting side in accordance with the parameters of the viewing environment received by the receiving means (for example, FIG. And second input means (for example, the sensors S ₃ and S _{4 in} FIG. 10) for inputting the parameters of the viewing environment on the receiving side for observing the image displayed and output on the output device. The index is set so that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side in accordance with the parameters of the visual environment input from the second input means. Second conversion means for converting data (for example, the visual environment conversion circuit 15 in FIG. 10) and output means for outputting image data obtained by the second conversion means to an output device (for example, FIG. Conver Characterized in that it comprises a 16) and.

The image data processing apparatus according to the thirty-fourth aspect converts the DDC image data into the DIC image data or the DI data.
First capturing means (for example, the conversion units 32 and 33 in FIG. 24) for capturing a profile for converting the image data of C into image data of DDC, and second capturing means (for example, for capturing the visual environment parameters). Rewriting means (for example, the color shown in FIG. 24) which rewrites the profile captured by the first capturing means in accordance with the visual environment parameter input units 35 and 92 of FIG. 24 and the visual environment parameters captured by the second capturing means. Adaptation model conversion circuits 34, 9
1) is provided.

Hereinafter, an embodiment of the present invention will be described. Before that, an outline of the present invention will be described with reference to FIG.

In the present invention, for example, as shown in FIG. 1, CRT monitors 3-1 and 3- are peripheral devices (input / output devices) of a plurality of transmitting / receiving apparatuses 1 connected via a network 100. 2, scanner 2, or
The color appearance of the image input / output via the printer 4 is made to match regardless of the visual environment. That is, each transmission / reception device 1 first has the built-in profile P
By converting the DDC to DIC by ₁ to P _4, to correct the differences in appearance due to the difference in the characteristics of each peripheral device. The whiteness of the ambient light emitted from the lamp L ₁ to L ₄ chromaticity of the white point of the paper hard copy images are printed chromaticity of the white point of the CRT monitor 3-1 According to the visual environment such as chromaticity or absolute luminance, a predetermined conversion is performed on each DIC, and the color of an image input / output from each peripheral device of the transmitting / receiving device 1 connected via the network 100 is converted. Appearance is matched.

FIG. 2 is a block diagram showing a configuration example of the first embodiment of the present invention. In this image processing system (in this specification, the system means an entire device composed of a plurality of devices, means, etc.), a CRT monitor 3 as a transmitting side input device, a receiving side A CRT monitor 4 is used as an output device of the CRT. First, an image is displayed (output) by self-emission, that is, from a CRT monitor 3 displaying a soft copy image, for example, RGB data as image data corresponding to the image is displayed. Is supplied to the image processing unit 1-1 on the transmission side. And
In the image processing unit 1-1, after the image data from the CRT monitor 3 is subjected to image processing, the image data is transmitted to the receiving side via the network 101. On the receiving side, the transmitted image data is received by the image processing unit 1-2, subjected to predetermined image processing, and then output to the CRT monitor 4. On CRT monitor 4,
An image corresponding to the data from the image processing unit 1-2 is displayed and output on the screen.

The image processing section 1-1 comprises a converter 11, a viewing environment conversion circuit 12, and an image editing processing circuit 13. Converter 11 stores a profile P ₁ for the CRT monitor 3 previously created, where its profile P ₁ is referred to, the CRT monitor 3
Is converted into XYZ data as DIC and supplied to the viewing environment conversion circuit 12.

The visual environment conversion circuit 12 includes a converter 11
In addition to the XYZ data from, the outputs of the sensors S ₁ and S ₂ are supplied. Sensors S ₁ and S ₂
A viewing condition parameter (viewing condition parameter) as a numerical value indicating an environment in which the user observes the soft copy image displayed on the CRT monitor 3 (viewing environment of the CRT monitor 3).
ter) is output. That is, the sensor S ₁
Is composed of, for example, a radiation colorimeter and measures, for example, chromaticity of ambient light (for example, light of a fluorescent lamp, etc.) around the environment where the CRT monitor 3 is installed, and uses this as a visual environment parameter. It is supplied to the visual environment conversion circuit 12. The sensor S ₂ is implemented eg by a contact type sensor, a CRT monitor 3 to self-luminous, for example to measure the chromaticity and absolute white point brightness, the viewing environment conversion circuit 12 as the the viewing condition parameters Supply.

The visual environment conversion circuit 12 converts the converter 1 according to the visual environment parameters from the sensors S ₁ and S _2.
The XYZ data from No. 1 is converted to L ⁺ M ⁺ S ⁺ data (details will be described later), which are appearance index data corresponding to color appearance under the visual environment of the CRT monitor 3.

Then, the L ⁺ M ⁺ S ⁺ data is supplied to the image editing processing circuit 13. The image editing processing circuit 13 performs, for example, color gamut compression (Gamut Compression) processing or color editing (Image processing) on the L ⁺ M ⁺ S ⁺ data from the viewing environment
An image editing process such as an editing process is performed and transmitted to the network 101.

The image processing unit 1-2 on the receiving side receives the image data transmitted via the network 101,
The image editing processing circuit 14 performs the same processing as that of the above-described image editing processing circuit 13 as necessary, and outputs the obtained data to the visual environment conversion circuit 15. The visual environment conversion circuit 15 is supplied with the output signals of the sensors S ₃ and S _{4 in} addition to the L ⁺ M ⁺ S ⁺ data from the image editing processing circuit 14. Sensor S ₃ is a soft copy image CRT monitor 4 outputs (image CRT monitor 4 outputs),
A visual environment parameter is output as a numerical value corresponding to the environment (visual environment of the CRT monitor 4) observed by the user. That is, the sensor S ₃ is constituted by, for example, a radiation color luminance meter, in the surrounding environment of the CRT monitor 4 are installed light (e.g., fluorescent light), for example, by measuring the chromaticity, which Is supplied to the visual environment conversion circuit 15 as a visual environment parameter. Further, the sensor S ₄ is composed of, for example, a contact type sensor and the like, and is a self-emitting CRT monitor 4.
For example, the chromaticity and the absolute luminance of the white point are measured and supplied to the visual environment conversion circuit 15 as visual environment parameters.

[0121] In viewing environment conversion circuit 15, in accordance with the viewing condition parameters from the sensor S _3, and color appearance under optical environment of the CRT monitor 4, and color appearance under the viewing condition CRT monitor 3 is coincident As described above, the L ⁺ M ⁺ S ⁺ data supplied from the image editing processing circuit 14 is processed. Then, the data obtained as a result of the processing is converted into XYZ data as DIC data and supplied to the converter 16.

The converter 16 is prepared in advance.
Stores a profile P ₄ for the CRT monitor 4, where the reference is made to the profile P _4, XYZ data from viewing condition conversion circuit 15 is converted as DDC CRT monitor 4, for example, RGB data , CRT monitor 4.

As a result, the CRT monitor 4 on the receiving side outputs (displays) a soft-copy image having almost no difference in color appearance from the soft-copy image displayed on the CRT monitor 3 on the transmitting side.

Next, the converter 11 or the converter 1
6 each profile P _1, a method of creating P ₄ for the CRT monitor 3 for or CRT monitor 4 is stored in will be described. First, when creating a profile for the CRT monitor 3, for example, R, G, and B of RGB data output by the CRT monitor 3 are 8-bit data dr, db, d, respectively.
In the case of g, first, rgb data as data obtained by normalizing RGB data is calculated according to the following equation (1).

[0125]

(Equation 1)

Here, in equation (1), R _max ,
G _max and B _max are R, C at the white point of the CRT monitor 3.
G and B are the respective values. Also, k _{r, gain} ,
_{k g, gain, k b,} gain is, R, G, B are the respective _{gains, k r, offset, k g} , offset, k b, offset is, R,
G and B offsets. Further, γ _r ,
γ _g and γ _b correspond to the characteristics of the CRT monitor 3 and
B is a coefficient (gamma correction coefficient) for performing each gamma correction. The numerical value 255 in the equation (1) is
Image data (dr, db, dg) output from the CRT monitor 3
Is 8 bits), and when the image data output from the CRT monitor 3 is n bits,
2 ⁿ −1.

Furthermore, XYZ data as DIC data is calculated by subjecting the rgb data to primary conversion according to the following equation (2).

[0128]

(Equation 2)

Here, the matrix on the right side of the equation (2) can be calculated as a conversion matrix between the colorimetric values of the CRT monitor 3 and rgb data by using, for example, the least square method.

Then, the profile P ₁ for the CRT monitor 3
Is completed by describing the correspondence between the XYZ data in equation (2) and dr, dg, db in equation (1) in a table format. In the converter 11, in addition to allowed to store the profile P ₁ for the CRT monitor 3, which is created as described above, according to equation (1) and (2), the 8-bit output from the CRT monitor 3 XYZ data may be sequentially calculated from the data dr, dg, db.

The processing described above is performed by the CRT monitor 4
By subjecting respect, it is possible to generate a profile P ₄ for the CRT monitor 4.

When the input / output device is other than the CRT monitor, for example, when creating a profile for a printer, first, CMY (K) data is input to the printer while changing its value, and the hardware obtained as a result is obtained. Measure the color of the copied image. Then, by describing the correspondence between the colorimetric values and the input CMY (K) data in a table format, a profile for a printer is completed.

To create a profile for a scanner, first, an image having a predetermined colorimetric value is read by the scanner, and the relationship between the RGB data output in that case and the colorimetric value is measured. . By describing the correspondence between the output RGB data and the colorimetric values in a table format, a profile for a scanner can be created.

Note that, of the color reproduction areas based on the XYZ data, areas not covered by the printer are associated with color reproduction areas that can be expressed by the printer.

Next, details of image processing in the viewing environment conversion circuit 12 will be described. In the visual environment conversion circuit 12,
First, the XYZ data from the converter 11 is subjected to a correction process for a change in contrast due to the influence of ambient light. Specifically, when the brightness of the ambient light in the environment where the CRT monitor 3 is installed is large, the contrast of the soft copy image displayed on the CRT monitor 3 is reduced. This is mainly because black, that is, the darkest point floats due to reflection of ambient light incident on the tube surface of the CRT monitor 3. In general, an anti-reflection film is formed on the tube surface of the CRT monitor 3. However, as long as ambient light exists, black that can be reproduced on the CRT monitor 3 must be darker than the reflected light. Can not. Therefore, human vision is sensitive to dark colors, and if black appears, the contrast of the image is reduced.

Therefore, in order to consider the above phenomenon, as shown in the following equation, reflection of ambient light is added to the light emitted from the phosphor of the CRT monitor 3 as an offset to correct the contrast. I do. Where R _bk is the CRT
This is the reflectance of the tube surface of the monitor 3 and is usually about 1 to 5%. The subscript (CRT1) of XYZ indicates that the value is related to the CRT monitor 3, and (Ambient1)
Indicates that the value is related to the ambient light of the CRT monitor 3.

[0137]

(Equation 3)

After adding the reflection of the ambient light according to the equation (3), normalization is performed so that the maximum value of Y ′ _(CRT1) becomes “100”.

Next, the visual environment conversion circuit 12 converts the data (X'Y ') to which the contrast has been corrected by the equation (3).
Z ′) _(CRT) is converted into LMS data corresponding to a signal of a human cone, that is, LMS spatial data by the following equation.

[0140]

(Equation 4)

Here, the matrix on the right side of the above equation is a known matrix obtained by a visual experiment.

Equation (4) uses Hunt-Pointer-Esteves transform, and converts data (X'Y'Z ') _(CRT) having a flat spectral distribution into human's data. The data is converted into data corresponding to the cone signal. Note that such a conversion equation is not limited to the equation (4).

The L, M, and S data obtained by equation (4) correspond to long, medium, and short wavelength signals among the human cone signals, respectively.

The L, M, and S data obtained as described above are subjected to a process for incomplete adaptation described below to correct chromatic adaptation according to the surrounding visual environment.

Human vision changes the sensitivity of each cone to make the light source white, similar to the white balance of a video camera. That is, a process of normalizing the output signal from each cone by the value of the white point is performed. In the present embodiment, the above-described normalization is basically performed based on the von Kries adaptation rule.
Rather than using the chromaticity of the light source as it is for the white point to which human vision has adapted, two processes, (1) processing for incomplete adaptation and (2) processing for mixed adaptation, are executed. Thus, chromatic adaptation is corrected according to the surrounding visual environment.

The processing for the above (1) incomplete adaptation is as follows:
This is a correction process for the chromaticity and luminance of the whiteness of the CRT monitor 3. In other words, human vision becomes incomplete as the chromaticity of the white point of the CRT monitor 3 deviates from the light of D65 or E, and as the luminance of the adaptation point becomes lower. Therefore,
The correction according to such visual characteristics is performed by the following equation.

[0147]

(Equation 5)

By such a correction, a difference in appearance due to a difference in characteristics of the CRT monitor 3 is corrected. Here, P _L , P _M , and P _S are chromatic adaptation correction coefficients (Chromatic Adaptati) used in the Hunt model.
on Factors), which can be determined, for example, by the following equation.

[0149]

(Equation 6)

However, l _E , m _E , and s _E are defined by the following equations. In addition, Y ' _mon1 (unit: cd / m ² )
Is the sum of the absolute luminance of the actual white point of the CRT monitor 3 and the reflection of ambient light.

[0151]

(Equation 7)

Here, examples of the actual chromatic adaptation correction coefficients P _L , P _M , and P _S of the CRT monitor 3 are shown in the following table. However, CCT
(Correlated Color Temperature) indicates the color temperature of the white point of the CRT monitor 3. Such value is measured by the sensor S _2, it is supplied to the viewing environment conversion circuit 12,
According to equation (5), L _n ′ _(CRT1) , M _n ′ _(CRT1) , and S _n ′
_{(CRT1 )} is calculated.

[0153]

[Table 1]

Next, (2) correction processing for mixed adaptation is performed. The term “mixed adaptation” means that when the white point of the CRT monitor 3 is different from the white point of the ambient light, human vision partially adapts to each white point. That is, in a general office or the like, a fluorescent lamp having a color temperature (CCT) of about 4150K is used, and a color temperature of a white point of a general CRT monitor is about 9300K. There is a big gap. In such a case, human vision partially adapts to both as described above. Therefore, it is assumed that the white point to which human vision adapts is between the two, and the ratio of adaptation to the white point of the CRT monitor 3 is R
_adp (adaptation rate), while the rate of adaptation to the white point of ambient light is (1-R _adp ), and the white point to which human vision adapts is newly defined as follows. .

[0155]

(Equation 8)

Here, Y ′ _mon1 is the _sum of the absolute luminance of the white point of the CRT monitor 3 and the reflection of ambient light, and Y _sur1 is the value on the monitor display surface illuminated by ambient light. Is the absolute luminance of the perfect diffuse reflection surface arranged almost in parallel to the surface. Alternatively, it can also be obtained from the illuminance M due to room light in the direction normal to the monitor display surface at a location near the monitor display surface by the following formula.

[0157]

(Equation 9)

(L _{n (Ambient1)} , M _{n (Ambient1)} ,
S _{n (Ambient1)} ) is the _chromaticity of the ambient light at the white point, and converts the ternary stimulus value (XYZ) into the sensitivity (LMS) of the human cone using the matrix of equation (4). It can be determined by doing.

Note that Y _adp1 can be obtained by the following equation.

[0160]

(Equation 10)

Here, the adaptation rate R _adp is a coefficient that takes a predetermined real value between 0 and 1, and when this value is 1, human vision is shifted to the white point of the CRT monitor 3. 100%
It is in a state that has been adapted and is not affected by ambient light, and is conceptually the same state as when CIE / L ^* a ^* b ^* is matched. When the adaptation rate R _adp is 0, human vision adapts 100% to the white point of ambient light, and CR
This is a state that is not affected by the T monitor 3, and is conceptually equivalent to the case where CIE / XYZ is matched.

Since the luminance of the CRT monitor 3 and the luminance of the ambient light are different, here, as shown in the equation (8), the weighting coefficient (Y ' _mon1 / _Yadp1 ) ^1/3 ,
(Y _{sur 1} / Y _adp1 ) ^1/3 has been introduced. For example, CRT
When the luminance of the monitor 3 and the luminance of the ambient light are at substantially the same level, the weighting coefficient is “1”.

As described above, the visual environment conversion circuit 12
The white point of the CRT monitor 3 in the equations (5) to (7)
Actual chromaticity L_{n (CRT1)}, M_{n (CRT1)}, S_{n (CRT1)}, And
And absolute luminance Y_mon1Are sensors as visual environment parameters
S_TwoAnd the ambient light in equation (8)
Chromaticity L of the white point of_{n (Ambient1)}, M_{n (Ambient1)}, S_{n (Am
bient1)}, And absolute luminance Y_sur1Is a parameter of the visual environment
Sensor S₁Supplied from Visual environment conversion circuit 1
2 is the sensor S₁And sensor S_TwoEnvironment supplied by
Each parameter shown in equations (5) to (8) is
The CRT module is executed in the presence of ambient light by performing
Human vision when observing the image displayed on the monitor 3
Of the white point that actually adapts (hereinafter referred to as the adaptive white point)
Chromaticity L ''_{n ( CRT1)}, M ''_{n (CRT1)}, S ''_{n (CRT1)}To
You can ask.

The chromaticities L ″ _{n (CRT1)} , M ″ _{n (CRT1)} , and S ″ _{n (CRT1)} of the adaptive white point thus obtained are _expressed by
By substituting into the following von Kries's adaptation equation, the color appearance when observing the soft copy image displayed on the CRT monitor 3 in the presence of ambient light is reflected. L ⁺ M ⁺ S ⁺ data (L ⁺ , M ⁺ , S ⁺ ) as index data can be obtained.

[0165]

[Equation 11]

The visual environment conversion circuit 12 executes the processing for the incomplete adaptation and the processing for the mixed adaptation based on the above equation, corrects the color adaptation according to the surrounding visual environment, and obtains the obtained index data of the appearance. L ⁺ M ⁺ S ⁺ is output to the image editing processing circuit 13.

The L ⁺ M ⁺ S ⁺ data or L ⁺ 'M ⁺ ' S ⁺ 'data obtained as described above is
, Where the following processing is performed.

That is, the image editing processing circuit 13 firstly outputs L ⁺ M ⁺ S ^+, which is the index data of the appearance from the visual environment conversion circuit 12.
The data is converted into L ^* a ^* b ^* space data, which is a visual uniform space.

[0169]

(Equation 12)

Here, X ₀ ^* , Y ₀ ^* , Z ₀ ^* are the respective values of X ^* , Y ^* , Z ^{* at} the white point. In the above case, the respective values are “100”. Become.

Next, the image editing processing circuit 13 calculates the expression (1)
Image processing such as the above-described color gamut compression processing and color editing processing is performed on the data in the L ^* a ^* b ^* space that is the visual equivalent space obtained in 2).

After the image editing processing, the image editing processing circuit 13 converts the data in the L ^* a ^* b ^* space into the original L ⁺ M ⁺ S ⁺ space based on the above equation (12). After conversion to the data (L ⁺ , M ⁺ , S ⁺ ), the data is converted into, for example, an analog signal and transmitted to the network 101.

The data transmitted via the network 101 is received by the image editing processing circuit 14 of the image processing unit 1-2 on the receiving side, and after being subjected to the same processing as that of the image editing processing circuit 13, Are supplied to the visual environment conversion circuit 15.

Next, the visual environment conversion circuit 15 converts the L ⁺ M ⁺ S ⁺ data (L ⁺ , M ⁺ , S ⁺ ), which is the index data of appearance, into the R of the CRT monitor 4 based on the following equation. , G, B signals converted to human cone signals L _(CRT2) , M
_(CRT2) and S _(CRT2) . Note that this equation is expressed by equation (1)
1), and (CRT2) indicates that it is a parameter related to the CRT monitor 4 on the receiving side.

[0175]

(Equation 13)

It should be noted that (L ”of the matrix on the right side of the equation (13)
_{n (CRT2)} , M " _{n (CRT2)} , S" _{n (CRT2)} ) can be obtained by the following equations.

[0177]

[Equation 14]

Here, Y ′ _mon2 is the _sum of the absolute luminance of the CRT monitor 4 and the reflection of ambient light, and Y _sur2 is CR
5 shows the absolute luminance of ambient light reflected by the screen of the T monitor 4. R _adp indicates that the human vision is a CRT monitor 4
Indicates the adaptation rate indicating the rate of adaptation to the white point. L _{n (Ambient2)} , M _{n (Ambient2)} , S
_{n (Ambient2)} indicates the chromaticity of the ambient light at the white point. Note that Y _adp2 can be obtained by the following equation.

[0179]

(Equation 15)

In addition, (L ' _{n (CRT2)} , M' _{n (CRT2)} , S '
_{n (CRT2)} ) can be obtained by the following equation.

[0181]

(Equation 16)

In the above equation, p _L , p _M , and p _S are obtained by adding Y ′ _mon2 obtained by adding the absolute luminance of the white point of the CRT monitor 4 detected by the sensor S ₃ and the reflection of ambient light to the following equation. It can be obtained by substituting.

[0183]

[Equation 17]

Here, the numbers of definitions l _E , m _E and s _E can be obtained by the following equations.

[0185]

(Equation 18)

Next, the visual environment conversion circuit 15 converts the LMS data corresponding to the human cone obtained as described above, that is, the data in the LMS space, based on the following equation to obtain the DIC. X ' _(CRT2) , Y' _(CRT2) ,
Calculate Z ′ _(CRT2) . This conversion is an inverse conversion expression of Expression (4).

[0187]

[Equation 19]

Subsequently, the visual environment conversion circuit 15 performs a contrast correction process using ambient light according to the following equation.
That is, data obtained by subtracting ambient light reflected from the tube from data X ′ _(CRT2) , Y ′ _(CRT2) , and Z ′ _(CRT2) are data X _(CRT2) , Y
_(CRT2) and Z _(CRT2) .

[0189]

(Equation 20)

The data in the XYZ space obtained by the equation (20) is output to the converter 16, where it is subjected to a primary conversion based on the following equation to be converted into RGB data.

[0191]

(Equation 21)

The RGB data calculated based on the above equation is further subjected to gamma correction based on the following equation, and data dr, dg, d corresponding to the CRT monitor 4.
b.

[0193]

(Equation 22)

Note that the conversion shown in Expressions (21) and (22) may be executed by reading a device profile, as in the conversions of Expressions (1) and (2). Dr, dg, db thus obtained
The data is output to the CRT monitor 4.

Next, the converters 11 and 1 described above are used.
6, the flow of image data in the image processing unit including the viewing environment conversion circuits 12 and 15 and the image editing processing circuits 13 and 16 will be described with reference to FIG.

In this embodiment, the RGB data (D) corresponding to the soft copy image displayed on the CRT monitor 3 is displayed.
1) The CRT monitor 3 stored in the converter 11
The profile P ₁ of use, is converted to XYZ data (D2) of the CIE / XYZ is a device-independent color space.

XYZ data independent of device (D2)
Are parameters of the visual environment in which the soft copy image of the CRT monitor 3 is actually observed, that is, the sensors S ₁ and S ₂
L ⁺ M ⁺ S ⁺
It is converted to data (D3).

Next, the L ⁺ M ⁺ S ⁺ data (D3) is converted into CIE / L ^* a ^* b data (D4), which is a perceptual uniform space, by the image editing processing circuit 13, and color conversion is performed as necessary. Area compression processing, color editing processing, and the like are performed. Then, the obtained L ^* a ^* b data is converted again into L ⁺ M ⁺ S ⁺ data, and transmitted to the image processing unit 1-2 on the receiving side via a network or the like.

The image processing unit 1-2 on the receiving side receives the received
The L ⁺ M ⁺ S ⁺ data is converted into L ^* a ^* b data (D4), and the same processing as that performed in the above-described image editing processing circuit 13 is executed as necessary and obtained. Data is converted into L ⁺ M ⁺ S ⁺ data (D6), and the visual environment conversion circuit 1
5 is output.

The visual environment conversion circuit 15 refers to the parameters of the visual environment on the receiving side, ie, the outputs from the sensors S ₃ and S ₄ , and converts L ⁺ M ⁺ S ⁺ (D6) into a device-independent CIE. / XY
The data is converted into XYZ data of Z (D7) and supplied to the converter 16.

[0201] converter 16 refers to the profile P ₄ for the CRT monitor 4, the XYZ data (D7), and converts the RGB data conforming to the CRT monitor 4 (D8), outputted to the CRT monitor 4 I do.

Next, each of the CRT monitor 3 and the CRT monitor 4 when the adaptation rate R _adp in the above-described equations (8), (10), (14), and (15) is changed. The degree of matching of the actual color appearance of the soft copy image displayed in FIG.

FIG. 4 shows a configuration example of a visual evaluation experiment for determining an appropriate adaptation rate _Radp in the present embodiment.

In this example, as shown in FIG. 4A, two CRT monitors A and B are arranged in front of the subject to prevent colors other than the display image of the CRT monitor from entering the visual field.
A panel plate whose surface is covered with an achromatic imitation paper having a reflectivity of 53.3% (corresponding to N8) surrounds the sides except the upper portions of the CRT monitors A and B. In addition, simultaneous binocular septum method (SimultaneousHapl
CRT monitor A, B for observation by oscopic method)
Between them, a panel board separating them is arranged, and further, as shown in FIG. 4 (C), the chin rest (FIG. 4 (B)) so that the right and left eyes can observe different CRT monitors respectively. ) See also). Further, in order to uniformly illuminate the ambient light on the entire screen of each of the CRT monitors A and B, as described above, the panel plate is not disposed on the upper part of the side surface. In this example, an experiment using the simultaneous binocular septum method is performed on the assumption that the left and right eyes can adapt to different white points.

In this visual evaluation test, first, a fluorescent lamp (4183K, 124 cd /
Under m ² ), a natural image is displayed on the CRT monitor A having a color temperature of 6530K. Then, six patterns having different adaptation rates R _adp (R _adp = 0.
(0, 0.2, 0.4, 0.6, 0.8, 1.0) natural images are randomly combined and displayed (FIG. 4D).
Which of these two is better than CRT monitor A
The subject is determined whether or not it is close to the color appearance of the image displayed in. Such a determination method is generally called a pair comparison method.

Incidentally, two types of natural images were used, and 21 subjects (20 males and 1 female) using fluorescent lamps with ambient light of (4183K, 124 cd / m ² ). And ambient light is (3486K, 150 cd /
m ² ) using 24 fluorescent lamps (male:
23 women and one female).

FIG. 5 is a graph showing the result of statistical processing of the data obtained by the above-described visual evaluation test. The horizontal axis of this graph indicates the value of the adaptation rate R _adp , and the vertical axis indicates the psychophysical quantity. The larger this value is, the more the natural image displayed on the CRT monitor B is displayed on the CRT monitor A. This indicates that the image is similar to the natural image being displayed.

As shown in this graph, when the value of the adaptation rate R _adp is in the range of 0.4 to 0.7, the image displayed on the CRT monitor A and the CRT monitor B regardless of the ambient light. It can be seen that sufficient matching has been achieved between the image displayed in FIG. In particular, when the value of the adaptation rate _Radp is 0.6, it can be seen that more sufficient matching can be achieved. Also, when the color temperature of the illumination light decreases, the peak of the graph becomes steep, and it is more clearly shown that 0.6 is the optimum value.

As a result of such an experiment, when a value of 0.6 is used as the adaptation rate R _adp , the color appearance of the image displayed on the input device on the transmission side and the color appearance of the image displayed on the output device on the reception side are determined. It can be seen that the difference can be minimized.

According to the above-described embodiment, when image information is transmitted via the network 101, contrast correction processing, chromatic adaptation correction processing, and the like are performed in accordance with the respective viewing environments of the transmission side and the reception side. Even if the color temperature of the CRT monitors 3 and 4 and the color temperature of the ambient light are different from each other, when the same image data is transmitted, the same soft copy image appears on the transmission side and the reception side. Can be obtained.

In the above embodiment, the parameters of the visual environment are acquired by the sensors S _{1 to} S _4. For example, as shown in FIG. 6, the image processing units on the transmission side and the reception side are acquired. A parameter setting circuit 17 and a parameter setting circuit 18 may be provided for 1-1 and 1-2, respectively, and the user may operate them to set the parameters of the visual environment.

That is, the sensors S _{1 to} S ₄ provided in the first embodiment shown in FIG. 2 are excluded, and instead, the parameter setting circuit 17 and the parameter setting circuit 18 are replaced with the image processing unit 1-1. 1, 1-2, and the transmitting and receiving users may set these according to the visual environment.

In addition, for example, a setting screen as shown in FIG. 7 may be displayed on the CRT monitor 3 or the CRT monitor 4, and the parameters of the visual environment may be input on this setting screen. .

More specifically, as setting items on the setting screen, for example, the chromaticity of the room light, the brightness of the room light, and the brightness of the CRT monitor 3 or 4 can be input. It has been done. Further, as the setting contents of each setting item, for example, the chromaticity of the interior light is “fluorescent light”, “incandescent light”, “D65”, “D50”, “customization (the user can arbitrarily input a value. ) "... can be selected. The brightness of the room light can be selected from “bright”, “normal”, “dark”, “customized (user can arbitrarily input a value)”. Further, the brightness of the CRT monitor 3 or CRT monitor 4 is
"Bright", "Normal", "Dark", "Customization (the user can arbitrarily input a value)"...

When "customize" is selected as the setting content in the setting item "chromaticity of interior light", FIG.
, The user can arbitrarily input the value of the xy chromaticity point or the correlated color temperature (CCT) in the items such as “chromaticity x”, “chromaticity y”, and “correlated color temperature”. Similarly, when “customize” is selected in the setting items “brightness of interior light” and “brightness of monitor”, the brightness of each interior light and the brightness of the monitor can be input to each item.

Note that the visual environment conversion circuits 12 and 15 store parameters corresponding to each set content, and xy chromaticity points corresponding to the set content on the setting screen.
Parameters such as a correlated chromaticity point (CCT), the brightness of a room light, or the brightness of a monitor are read.

[0217] cost, according to this embodiment, it becomes possible for the user to easily set the parameters, there is no need to include a sensor S ₁ to S _4, that much device Can be reduced.

Next, a configuration example of the second embodiment of the present invention will be described. FIG. 8 is a block diagram showing a configuration example of the second embodiment of the present invention. In this figure, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof will not be repeated.

In this embodiment, the CRT monitor 4 is replaced by a printer 20 as compared with the case of FIG. The sensor S ₃ is adapted to measure the chromaticity of the white point of the print paper. Other configurations are the same as those shown in FIG.

Next, the operation of the above embodiment will be described. The operation of the image processing unit 1-1 on the transmitting side is the same as that in the case of FIG. 2 described above, and the description thereof will be omitted.

The CR output from the image editing processing circuit 13
The L ⁺ M ⁺ S ⁺ data corresponding to the soft copy image on the T monitor 3 is transmitted to the image processing unit 1-2 on the receiving side via the network 101.

In the image processing unit 1-2 on the receiving side, the image editing processing circuit 14 receives the L ⁺ M ⁺ S ⁺ data transmitted via the network 101. Image editing processing circuit 14
Performs image editing processing such as color gamut compression processing and color editing processing as in the first embodiment, and outputs the obtained data to the visual environment conversion circuit 15.

The chromaticity L of the white point of the print paper P _{out on} which the printer 20 prints an image is stored in the visual environment conversion circuit 15.
_{n (PRN), M n (} PRN), is S n _(PRN), is supplied from the sensor S ₃ as viewed parameter environment. The chromaticity L _{n (PR N)} of the white point of the print sheet _{P out, M n (PRN)} , S
_{n (PRN)} is the chromaticity L of the white point to which human vision adapts when observing a hard copy image printed on print paper.
_{n (HardCopy), M n (} HardCopy), are S n _(HardCopy).

Here, the XYZ data obtained by converting the CMY (K) data, which is the image data corresponding to the hard copy image, by the printer profile P ₄ stored in the converter 16 is described above. From equation (4), L
When further converted to MS data, data reflecting the color appearance when observing the hard copy image output from the printer 20 is L / L _{n (HardCopy)} , M /
_{Mn (HardCopy)} and S / _{Sn (HardCopy)} .

In the viewing environment conversion circuit 12 on the transmission side,
As described in the first embodiment, the CRT monitor 3
Image processing such as correction of contrast in consideration of reflection from the tube surface and correction of chromatic adaptation to human vision in the case where the brightness of ambient light changes, etc., is a soft copy displayed on the CRT monitor 3. Images and printer 20
In order to match the color appearance of the hard copy image output from the above, since the right side of the equation (11) is data reflecting the color appearance when the soft copy image is observed, the following equation ( 23) should be satisfied.

[0226]

(Equation 23)

Therefore, from equation (23), the received
L ⁺ M ⁺ S ⁺ data (L ⁺ , M ⁺ , S ⁺ ) is converted by the following equation to calculate LMS data.

[0228]

(Equation 24)

The LMS data calculated in this way is
XYZ data as DIC can be obtained by performing a linear transformation using an inverse matrix of the matrix on the right side of Expression (4). Then, the calculated XYZ data is supplied to the converter 16. In the converter 16, the profile P ₄ is referred, XYZ data is converted into a corresponding CMY (K) data to the printer 20, is outputted to the printer 20.
The printer 20 prints an image corresponding to the supplied CMY (K) data on print paper _Pout .

According to the second embodiment as described above,
Even when the viewing environments on the receiving side and the transmitting side are different from each other, the color appearance of the soft copy image displayed on the CRT 3 and the color appearance of the hard copy image output from the printer 20 can be matched with high accuracy. Become.

[0231] Incidentally, in the above embodiments, the chromaticity of the white point of the print sheet P _out detected by the sensor S _3, but to perform the correction processing based on the detected values, for example, sensor instead of S _3, the sensor S ₄ is a radiation color meter to measure the chromaticity of the ambient light in the environment to observe the hard copy image printed on the printing paper sheet P _out, observing the hard copy image measurement results Chromaticity of the white point (L _{n (HardCopy)} , M
_{n (HardCopy)} , S _{n (HardCopy)} ).

Further, instead of using the output from either the sensor S ₃ or the sensor S ₄ , the output from both the sensor S ₃ and the sensor S ₄ may be used. In that case, in the above equation (24), the sensor S
₃ and parameters of the corresponding viewing environment to the color of the white point of the print sheet P _out of the printer 20 to print an image output from the hard copy image printed on the printing paper sheet P _out output from the sensor S ₄ Considering both the parameters corresponding to the chromaticity of the ambient light in the viewing environment,
The chromaticity of the white point (L _{n (Hard Copy)} , M _{n (HardCopy)} , S
_{n (HardCopy)} ). This makes it possible to obtain more accurate chromaticity data, so that the color appearance of the soft copy image on the CRT monitor 3 and the color appearance of the hard copy image on the printer 20 can be matched with higher accuracy. .

Next, a third embodiment of the present invention will be described.

FIG. 9 is a block diagram showing a configuration example of the third embodiment of the present invention. In this figure, the same parts as those in FIG. 8 (the second embodiment) are denoted by the same reference numerals, and the description thereof is omitted.

In this embodiment, the viewing environment conversion circuit 15 and the converter 16 on the receiving side are connected to the image processing unit 1- on the transmitting side.
1 and the image editing processing circuit 14 on the receiving side is integrated with the image editing processing circuit 13 on the transmitting side. Other configurations are the same as those shown in FIG.

Next, the operation of this embodiment will be described. The RGB data output from the CRT monitor 3 on the transmission side is supplied to the converter 11, where it is converted into XYZ data as DIC and then output to the viewing environment conversion circuit 12.

The visual environment conversion circuit 12 refers to the outputs from the sensors S ₁ and S _2, and converts the input XYZ data into index data L corresponding to the color appearance under the visual environment of the CRT monitor 3. ^The data is converted to ⁺ M ⁺ S ⁺ data and output to the image editing processing circuit 13.

The image editing processing circuit 13 performs color gamut compression processing, color editing processing, and the like on the L ⁺ M ⁺ S ⁺ data from the visual environment conversion circuit 12, and converts the obtained data into a visual environment conversion circuit. 1
5 is output.

The visual environment conversion circuit 15 includes a sensor S on the receiving side.
₃ and came transmitted from the sensor S _4, with reference to the parameters of the receiving side viewing condition, the L ⁺ M ⁺ S ⁺ data output from the image editing processing circuit 13, a color under the viewing conditions of the printer 20 Is converted into XYZ data corresponding to the appearance of the image and output to the converter 16.

The converter 16 is connected to the printer 20 on the receiving side.
Profile P for printer 20 sent from
₄ and receives the XYZ data output from the visual environment conversion circuit 15 by referring to the profile P _4.
Converts to CMY (K) data as DC and
Is sent to

CM transmitted via network 101
The Y (K) data is sent to the printer 2 via the image processing unit 1-2.
0, and print paper P as a hard copy image
It is printed on _out.

According to the above-described embodiment, the transmission side performs the conversion process according to the parameters of the viewing environment on the transmission side and the reception side on the image data, and then transmits the image data via the network 101. Therefore, it is possible to simplify the device on the receiving side.

In the above embodiment, the outputs of the sensors S ₃ and S ₄ and the profile P _{4 of the} printer 20 are transmitted via a transmission medium different from the network 101. Needless to say, the data may be transmitted via 101.

Next, a fourth embodiment of the present invention will be described.

FIG. 10 is a block diagram showing a configuration example of the fourth embodiment of the present invention. In this figure, FIG.
The same parts as those of the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In this embodiment, contrary to the case of FIG. 9, converter 11 on the transmitting side and visual environment conversion circuit 12
Are moved to the image processing unit 1-2 on the receiving side, and the image editing processing circuit 14 on the receiving side is integrated into the image editing processing circuit 13 on the transmitting side. Other configurations are
This is the same as the case shown in FIG.

Next, the operation of this embodiment will be described. The RGB data output from the CRT monitor 3 on the transmitting side is transmitted from the image processing unit 1-1 to the image processing unit 1-2 on the receiving side via the network 101.

The converter 1 of the image processing section 1-2 on the receiving side
1 is the RGB transmitted through the network 101
Which receives the data, it receives the profile P ₁ of the CRT monitor 3 of the transmitting side. Then, referring to the profile P ₁ , the RGB data is converted into XYZ data as DIC and then output to the viewing environment conversion circuit 12.

The visual environment conversion circuit 12 refers to the detection signals transmitted from the sensors S ₁ and S _2, and converts the input XYZ data into a color appearance under the visual environment of the CRT monitor 3 on the transmitting side. Is converted into L ⁺ M ⁺ S ⁺ data, which is index data corresponding to, and output to the image editing processing circuit 13.

The image editing processing circuit 13 performs color gamut compression processing, color editing processing, and the like on the L ⁺ M ⁺ S ⁺ data from the visual environment conversion circuit 12, and converts the obtained data into a visual environment conversion circuit. 1
5 is output.

The viewing environment conversion circuit 15 refers to the parameters of the viewing environment on the receiving side measured by the sensors S ₃ and S ₄ and is output from the image editing processing circuit 13.
The L ⁺ M ⁺ S ⁺ data is converted into XYZ data corresponding to the color appearance under the visual environment of the printer 20 and output to the converter 16.

The converter 16 is connected to the printer 20 on the receiving side.
With reference to the profile P ₄ for the visual environment conversion circuit 15.
XYZ data output from the
The data is converted into CMY (K) data and output to the printer 20.

The printer 20 prints a hard copy image corresponding to the supplied CMY (K) data on print paper _Pout .

In the above embodiment, the RGB data output from the CRT monitor 3 on the transmitting side is transmitted via the network 101, and the receiving side performs conversion processing according to the parameters of the viewing environment on the transmitting side. Then, since the output is performed to the printer 20, it is possible to simplify the device on the transmission side.

Next, a fifth embodiment of the present invention will be described.

FIG. 11 is a block diagram showing a configuration example of the fifth embodiment of the present invention. In this figure, FIG.
The same parts as those in the third embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In this embodiment, converter 16 has been moved to the receiving side as compared with the case of FIG.
Other configurations are the same as those shown in FIG.

Next, the operation of this embodiment will be described. The RGB data output from the CRT monitor 3 on the transmission side is supplied to the converter 11, where it is converted into XYZ data as DIC and then output to the viewing environment conversion circuit 12.

The visual environment conversion circuit 12 refers to the outputs from the sensors S ₁ and S _2, and converts the input XYZ data into index data L corresponding to the color appearance under the visual environment of the CRT monitor 3. ^The data is converted into ⁺ M ⁺ S ⁺ data and output to the image editing processing circuit 13.

The image editing processing circuit 13 performs a color gamut compression process, a color editing process, and the like on the L ⁺ M ⁺ S ⁺ data from the viewing environment conversion circuit 12, and converts the obtained data into a viewing environment conversion circuit. 1
5 is output.

The visual environment conversion circuit 15 refers to the parameters of the visual environment on the receiving side transmitted from the sensors S ₃ and S ₄ and outputs the L ⁺ output from the image editing processing circuit 13.
The M ⁺ S ⁺ data is converted into XYZ data corresponding to the color appearance under the viewing environment of the printer 20 and the network 101
To the receiving side via.

Converter 1 of image processing section 1-2 on the receiving side
6, came transmitted via the network 101, receives the XYZ data which is output data from the viewing condition conversion circuit 15, with reference to the profile P ₄ for the printer 20, the XYZ data of the printer 20 DDC Is converted to CMY (K) data and supplied to the printer 20.

The printer 20 prints _out a hard copy image corresponding to the CMY (K) data supplied from the converter 16 on a print sheet _Pout .

In the above embodiment, on the transmitting side,
After performing a conversion process in accordance with the parameters of the receiving side viewing condition and the transmission side, and sent over the network 101, with reference to the printer profile P ₄ on the receiving side, CMY
(K) Since the data is converted into data, the device on the receiving side can be simplified.

In the above embodiment, the outputs of the sensors S ₃ and S ₄ and the profile P _{4 of the} printer 20 are transmitted on a transmission medium different from the network 101. Needless to say, the data may be transmitted via the Internet.

Next, a sixth embodiment of the present invention will be described.

FIG. 12 is a block diagram showing a configuration example of the sixth embodiment of the present invention. In this figure, FIG.
The same parts as those of the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In this embodiment, the converter 11 on the receiving side has been moved to the transmitting side as compared with the case of FIG. Other configurations are the same as those in FIG.

Next, the operation of this embodiment will be described. The RGB data output from the CRT monitor 3 on the transmission side is supplied to the image processing unit 1-1 on the transmission side. The image processing unit 1-1, converter 11 refers to the profile P ₁ of the CRT monitor 3, after conversion to XYZ data of RGB data as DIC, and sends to the network 101.

The viewing environment conversion circuit 12 of the image processing unit 1-2 on the receiving side has been transmitted via the network 101.
Receive XYZ data.

The visual environment conversion circuit 12 refers to the detection signal of the transmitting side detected and transmitted by the sensors S ₁ and S _2, and converts the input XYZ data to the CRT of the transmitting side.
The image data is converted into L ⁺ M ⁺ S ⁺ data, which is index data corresponding to the color appearance under the viewing environment of the monitor 3, and output to the image editing processing circuit 13.

The image editing processing circuit 13 performs a color gamut compression process, a color editing process, and the like on the L ⁺ M ⁺ S ⁺ data from the visual environment conversion circuit 12, and converts the obtained data into a visual environment conversion circuit. 1
5 is output.

The visual environment conversion circuit 15 refers to the parameters of the visual environment on the receiving side measured by the sensors S ₃ and S ₄ and is output from the image editing processing circuit 13.
The L ⁺ M ⁺ S ⁺ data is converted into XYZ data corresponding to the color appearance under the visual environment of the printer 20 and output to the converter 16.

The converter 16 is connected to the printer 20 on the receiving side.
With reference to the profile P ₄ for the visual environment conversion circuit 15.
XYZ data output from the
The data is converted into CMY (K) data and output to the printer 20.

The printer 20 prints a hard copy image corresponding to the supplied CMY (K) data on print paper _Pout .

In the above embodiment, the RGB data output from the CRT monitor 3 on the transmitting side is converted into XYZ data by the converter 11, and then transmitted via the network 101. After performing a conversion process according to the parameters of the viewing environment on the receiving side, the printer 2
Since the output is made to be 0, it is possible to simplify the device on the transmission side.

In the above embodiment, the CRT monitor 3 was used as the input device on the transmitting side, but other devices may be used. FIG. 13 shows a configuration example when the scanner 30 is used as an input device on the transmission side. In this embodiment, the same parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the CRT monitor 3 is replaced by a scanner 30 as compared with the case of FIG. The sensor S ₆ is, for example, a contact type sensor, the chromaticity of the white point of the print paper P _in measured, are made to enter the measured chromaticity viewing environment conversion circuit 12. Further, the converter 11, the profile P ₃ for the scanner 30 is stored. Other configurations are the same as those in FIG.

Next, the operation of the above embodiment will be briefly described.

The image data input from the scanner 30 on the transmitting side is supplied to the image processing section 1-1 on the transmitting side. Converter 11 of the image processing unit 11 refers to the profile P ₃ of the scanner 30 is converted into XYZ data as DIC RGB data output from the scanner 30, and outputs it to the viewing environment conversion circuit 12 . Visual environment conversion circuit 12
Refers to the visual environment data detected by the sensors S ₁ and S _2, and refers to the input XYZ data as index data corresponding to the color appearance under the visual environment of the transmitting side, L ⁺
The data is converted into M ⁺ S ⁺ data and output to the image editing processing circuit 13.

The image editing processing circuit 13 performs color gamut compression processing, color editing processing, and the like on the L ⁺ M ⁺ S ⁺ data from the viewing environment conversion circuit 12, and converts the obtained data into the network 10
Send to 1

The image editing processing circuit 14 of the image processing section 1-2 on the receiving side receives the data transmitted via the network 101, and performs color gamut compression processing and color After executing the editing process or the like, the obtained data is output to the visual environment conversion circuit 15.

The visual environment conversion circuit 15 refers to the parameters of the visual environment on the receiving side measured by the sensors S ₃ and S ₄ and is output from the image editing processing circuit 13.
The L ⁺ M ⁺ S ⁺ data is converted into XYZ data corresponding to the color appearance under the visual environment of the CRT monitor 4 and output to the converter 16.

[0284] Converter 16 is a CRT monitor 4 on the receiving side.
With reference to the profile P ₄ for the visual environment conversion circuit 15.
XYZ data output from the CRT monitor 4 as DDC
The data is converted into GB data and output to the CRT monitor 4.

The CRT monitor 4 displays and outputs a soft copy image corresponding to the supplied RGB data.

[0286] According to the above embodiment, the color appearance of the image printed on the printing paper sheet P _in the transmitting side, when transmitting the image to the receiving side reads the scanner 30, the receiving side It is possible to match the color appearance of the image displayed on the CRT monitor 4.

In the above embodiment, the visual environment conversion circuit 12 converts the input image data into L ⁺ M ⁺ S ⁺ data that does not depend on the visual environment. You may make it convert into the data of Lab format. An example of the process in that case will be described below.

First, L ⁺ M ⁺ S ⁺ data is converted into CIE / XYZ format data based on the following equation, and this is converted into (X ⁺ ,
Y ⁺ , Z ⁺ ).

[0289]

(Equation 25)

Then, the obtained (X ⁺ , Y ⁺ , Z ⁺ ) data is converted into CIE / Lab format by the following formula,
(L ⁺ , a ⁺ , b ⁺ ) are obtained.

[0291]

(Equation 26)

Here, f () is a function defined by the following equation, and a given value is converted according to a value in parentheses.

[0293]

[Equation 27]

By the above processing, (L ⁺ , M ⁺ , S
⁺ ) Data can be converted to (L ⁺ , a ⁺ , b ⁺ ) data.

On the other hand, when the (L ⁺ , a ⁺ , b ⁺ ) data is converted into the (L ⁺ , M ⁺ , S ⁺ ) data, the following processing can be executed.

That is, first, (L ⁺ ,
M ⁺ , S ⁺ ) data is converted to (X ⁺ , Y ⁺ , Z ⁺ ) data.

[0297]

[Equation 28]

Here, fy, fx and fz are defined by the following equations.

[0299]

(Equation 29)

Next, (X
⁺ , Y ⁺ , Z ⁺ ) data by the following equation (L ⁺ , M ⁺ ,
S ⁺ ) data.

[0301]

[Equation 30]

According to the above arithmetic processing, (L ⁺ ,
M ⁺ , S ⁺ ) data is generally used (L ⁺ ,
a ⁺ , b ⁺ ) data, and conversely, (L ⁺ , b ⁺ )
a ⁺ , b ⁺ ) data can be converted to (L ⁺ , M ⁺ , S ⁺ ) data. It is possible to construct a system that does not change.

[0303] Finally, as hardware for realizing the transmitting / receiving device 1 connected via the network 100, a computer-based hardware will be described as an embodiment. The transmission / reception device 1 is not limited to this embodiment. Any device capable of performing the above-described conversion of the predetermined image and transmitting / receiving the image data may be used as an analog device without using software like a computer. Circuit or TT
Digital circuits such as L, PLD, and gate arrays may be used.

FIG. 14 is a block diagram showing an example of a hardware configuration of a computer 200 as an embodiment for realizing the transmission / reception apparatus 1 of the present invention. The computer 200 is obtained by adding a sensor, a communication device, and the like for implementing the present invention to a computer currently on the market.

The CPU 201 has a function of controlling and calculating the whole of the present apparatus.
Use m or the like. The cache 202 is a high-speed storage unit that stores information in a memory that is frequently accessed by the CPU 201, and can directly increase and decrease the system by directly transmitting and receiving information to and from the CPU 201.

The system controller 203 is
1 and a circuit unit for adjusting the timing of the cache 202, the memory 204, the computer bus 209, and the PCI bus 210. For example, TRITON (4
30FX) or the like.

[0307] The memory 204 is a storage unit for writing and reading information in accordance with instructions from the CPU 201 or the system controller 203. For example, a DRAM (Dyna
micRandom Access Memory). The memory 204 is stored in the CPU 2 through the system controller 203.
01, and various resources on a computer bus 209 to store information. Of course, it is also possible to store the above-mentioned image data.

[0308] The computer bus 209 is a means for transmitting information directly connected to the CPU 201.
02, high-speed information exchange with the system controller 203 and the like is enabled. The PCI bus 210 is a means for transmitting information separated from the computer bus 209, and is connected to the system controller 203. The CPU 201 can access various resources connected to the PCI bus 210 via the system controller 203.

The external storage control unit 211
The hard disk 212 and the CD-ROM drive 213 are connected to the hard disk 212 and the CD-ROM drive 213. Write / read control is performed. For example, this connection uses SCSI or IEEE1394. The external storage device is a hard disk 212 or a CD-R.
The storage medium is not limited to the OM drive 213, and may be a writable and removable recording medium such as a floppy disk or a magneto-optical disk. Accordingly, the data for implementing the present invention, such as the image data, the visual environment parameters, and the visual index data, which perform the above-described conversion, are stored in a recording medium and transported, so that the above-described transmission and reception can be replaced. .

A keyboard / mouse control unit 214 includes a keyboard 215 and a mouse 2 serving as a pointing device.
16 is connected to the PCI bus 210, and the characters, numerical values and symbols input by the user, the movement of the mouse and the operation of the mouse button performed by the user are processed by the CPU 20 according to a predetermined sequence.
1 is transmitted. As a result, the CPU 201
Is a CRT (Cathode Ray) via the video controller 225.
The input information from the user can be received while the pointer displayed along with the image displayed on the (Tube) monitor 226 is relatively moved. Of course, input on the above-mentioned setting screen is also possible in the same manner.

The scanner / printer control unit 217 is a PCI
The bus 210 is connected to the scanner 218 and the printer 219, and controls writing and reading of image information based on an information access request via the PCI bus 210. This connection is generally a connection based on SCSI or IEEE1394. The information exchanged here is stored in the scanner 218 and the printer 219 used for the conversion between DIC and DDC in addition to the information read / input optically and the information printed / output. It is also possible to send and receive information on the characteristics of the device.

[0312] The communication control unit 220 is connected to the telephone line 222 via the modem 221 or is connected via the network communication device 223 such as a transceiver or HUB.
E802.3 (Ethernet), FDDI, ATM, or
PC connected to network 224 such as IEEE1394
Transmission and reception of information are controlled based on an information access request via the I bus 210 or an information access request of a communication destination. Of course, it is also possible to transmit and receive data for implementing the present invention, such as image data for performing the above-described conversion, visual environment parameters, and appearance index data.

The video controller 225 is connected to the PCI bus 2
10 is drawn on a video memory (not shown) in the video controller 225 based on an instruction from the CPU 201 or the like, and the content is displayed on the CRT monitor 226. Has become. Of course, it is also possible to store the above-mentioned image data in the video memory in the video controller 225. Further, device information stored in the CRT monitor 226 can be exchanged with the CRT monitor 226 as in the VESA DDC (display data channel) standard.

The CRT 226 is connected to the above-mentioned video controller 225, and displays an image drawn by the video controller 225 based on an instruction from the CPU 201 or the like. Of course, not only CRT monitor, PDP (Plas
It is also possible to use a display device such as a ma display panel or a liquid crystal display. In the present invention, the CRT monitor 226 also has a role of displaying a soft copy image in cooperation with the video controller 225, and functions as an input device of an image observed by the user on the transmission side, and Functions as an output device for an image observed by the user.

[0315] The sensor control section 227 is connected to the PCI bus 210 and various sensors 228, and detects a physical quantity such as voltage, temperature, or brightness based on an instruction from the CPU 201 or the like. In particular, as an embodiment of the present invention, it plays a role as a sensor for measuring visual environment parameters, such as chromaticity of ambient light and CRT monitor 2.
It is possible to detect chromaticity such as 26 and absolute luminance.

As described above, an example of the hardware configuration of the computer 200 has been described as an embodiment for realizing the transmission / reception apparatus 1 of the present invention.
0 and the peripheral devices operate in cooperation with each other by the program / software, and the respective units of the computer 200 and the peripheral devices share the above-described units and circuits with the CPU 201 as the center.

For example, the CRT monitor 3 as an input device on the transmitting side and the CRT monitor 4 as an output device on the receiving side in the configuration example of the first embodiment of the present invention shown in FIG. And CRT monitor 226
Plays mainly that role. The converters 11 and 16 refer to the profiles of the CRT monitors 3 and 4
Since the conversion from image data to XYZ image data or vice versa is performed, the memory 204 for storing the profile of the CRT monitor 226 and the image data and the CPU 201 for performing the calculation of the conversion process mainly play the role.

Visual environment conversion circuit 12 and visual environment conversion circuit 15
Performs conversion from XYZ image data to L ⁺ M ⁺ S ⁺ image data or vice versa in accordance with the visual environment parameters from the sensors S ₁ , S ₂ , S ₃ , and S _4. The control unit 227 and the CPU 201 mainly play a role of taking in the visual environment parameters from the sensor.
U201 mainly plays the role of performing the operation of the conversion process. Since the image editing processing circuit 12 and the image editing processing circuit 14 perform image editing processing such as color gamut compression processing and color editing processing, the memory 204 and the CPU 201 mainly play the role of performing the calculation processing of the conversion processing. . The transmission and reception to and from the network 101 by the image processing unit 1-1 and the image processing unit 1-2 are performed by the memory 204 for storing data and the communication control unit 2.
20 plays a role of controlling transmission and reception.

Of course, in the above-mentioned role assignment control, it goes without saying that the execution of the program by the CPU 201 is involved.

By realizing each configuration example of the above embodiment of the present invention on the above hardware, it is possible to construct a system in which the color appearance intended by the present invention does not change depending on the visual environment. It becomes possible. It is needless to say that the present invention is not limited to this embodiment, but any device capable of performing a predetermined image conversion operation and transmitting and receiving image data can be a transistor, an analog circuit such as an operational amplifier, a digital circuit such as a TTL, a PLD, or a gate array. May be included.

[0321] By the way, currently available CMS is ICC.
(International Color Consortium) in most cases. In the CMS, as described above, conversion processing is performed based on the device profile. Although it is possible to construct a CMS that matches the color appearance by newly constructing a unique system, it is not possible to ensure compatibility with the existing ICC CMS. That is, the existing resources cannot be used effectively. Therefore, in the following, a system for matching colors using an existing ICC CMS will be described.

FIG. 15 shows a configuration example of such an image processing system. In this system, a CRT 41 and a printer 42 are connected to an image processing unit 31 constituting a CMS. Then, the soft copy image displayed on the CRT 41 is captured and supplied to the conversion unit 32 of the image processing unit 31. The conversion unit 32
The input image data is processed based on the input profile 32A and output to the conversion unit 33. The conversion unit 33 processes the input image data based on the built-in output profile 33A,
2 is output.

The input profile 32A of the conversion unit 32 is
The data is read out by the color adaptation model conversion circuit 34 as needed, and is rewritten appropriately in response to the input from the visual environment parameter input unit 35. The input unit 35 is a GUI
Or it is constituted by a sensor or the like, for example, ambient light L ₁ of the chromaticity of the CRT 41, and data such as brightness, have been made to capture such luminance data of the white point of the CRT 41.

FIG. 16 shows a more detailed configuration example of the image processing section 31. In this configuration example, the input profile 32A converts RGB data as DDC data input from the CRT 41 into XYZ data as DIC data, and outputs it to a PCS (Profile Connection Space) 61. The PCS 61 is configured to output the input XYZ data to the conversion unit 33. The output profile 33A of the conversion unit 33 converts the input XYZ data into CMY (K) data as DDC data, outputs it to the printer 42, prints it on the print paper 43,
It is designed to output as a hard copy image.

Next, referring to the flowchart of FIG. 17, the case where the soft copy image displayed on the CRT 41 is supplied to the printer 42 via the image processing unit 31 and printed as a hard copy image on the print paper 43 Will be described.

First, in step S 1, the chromatic adaptation model conversion circuit 34
A process for reading A is executed. Then, in step S2, from among the read input profiles 32A,
A process for reading TRC (rTRC, gTRC, bTRC), _{MXYZ_mr,} and wtpt is executed.

Here, TRC is a general term for rTRC, gTRC, and bTRC. These are functions for linearizing predetermined data or conversion table data, for example, rTRC
[A] means data obtained by linearizing data A with rTRC.

M _{XYZ_mr} means a matrix represented by the following equation.

[0329]

(Equation 31)

Note that (X _{mr, red} ,
Y _{mr, red} , Z _{mr, red} ) is R media as CRT41 media.
Represents the relative tristimulus value (rXYZ) of the phosphor,
_{(X mr, green, Y mr} , green, Z mr, green) , the relative tristimulus values of the G phosphor represents _{(gXYZ), (X mr,} blu e, Y mr, blue,
Z _{mr, blue} ) represents the relative tristimulus value (bXYZ) of the B phosphor.

[0331] Further, wtpt the relative tristimulus values of the white point of CRT41 represents _{(X r, mw, Y r} , mw, Z r, mw) a.

Note that, in this specification, (X _r , Y _r ,
Z _r ) represents the relative tristimulus value. The subscript mr is me
It means dia relative and is used to indicate the relative value of media.

[0333] The input profile 32A and the output profile 33A are created based on the ICC Profile Format Specification. ICC Profile Format Specifi
The cation can be obtained by accessing the homepage of the ICC (the URL is http://www.color.org) via the Internet. In this format, as shown in FIG. 18, a header is arranged at the beginning, and the size, the CMM (Color Management Module) (software for performing color conversion processing), the version, Target device,
The color space, date and time of creation, and the like are recorded. In the tag table next to the header, a tag count indicating the number of bytes of the tag itself and a tag as a pointer indicating a position where data (tag element data) are arranged are arranged.

FIG. 19 shows such an ICC Profile Format.
5 shows a display example in the case where the content is displayed on the CRT 41 using application software for viewing the profile. As shown in the drawing, this profile includes TRC, _{MXYZ_mr} , and wtpt.

Next, proceeding to step S3 in FIG. 17, the color adaptation model conversion unit 34 takes in the visual environment parameters from the visual environment parameter input unit 35. As the visual environment parameters, the chromaticity (x _sur , y _sur ) of the ambient light L ₁ of the CRT 41 is used.
And the absolute luminance Ya _{, sur} and the absolute luminance Ya _{, mon} of the CRT 41 can be captured. In this specification, the suffix a means absolute, and the symbol with the suffix indicates an absolute value.

The suffix sur means that the symbol with the suffix represents ambient light data.
Further, the subscript mon means that the symbol with the subscript indicates data relating to a monitor (CRT).

FIG. 20 shows a display example of an input screen (GUI) for inputting visual environment parameters of the CRT 41. As shown in the figure, the user can input necessary visual environment parameters as numerical values by appropriately operating a keyboard or the like (not shown) of the visual environment parameter input unit 35.

Of course, these visual environment parameters are
It is also possible to detect with a sensor and take in the detection result.

At step S3 in FIG. 17, when the capture of the visual environment parameters is completed, the process proceeds to step S4, where the conversion process in the color adaptation model conversion circuit 34 is executed. Details of this conversion processing will be described later with reference to the flowchart in FIG.

As a result of the processing of the color adaptation model conversion circuit 34, in step S5, the readout in step S2 was performed.
Corresponding to TRC, M _{XYZ_mr} , wtpt, TRC ′, M ′ _{XYZ_mr} , wtpt ′ are obtained as data to be rewritten respectively. In step S6, the rewriting of the input profile 32A is executed using the rewriting data obtained in this manner.

As described above, the input profile 32
When rewriting of A is completed, RGB captured from CRT41
The data is referred to as XY with reference to the input profile 32A.
The data is converted into Z data and supplied to the output profile 33A via the PCS 61. And the output profile 33A
Then, the data is converted from XYZ data into CMY (K) data, output to the printer 42, and printed on the print paper 43.

In the processing example shown in FIG. 17, it is assumed that the input profile 32A in the conversion circuit 32 has been created in advance, but if the input profile 32A has not been created yet, a new Can be created. In this case, as shown in FIG. 21, the CRT 41 displays, for example, grayscale patches, RGB color patches, and white patches. Then, the sensor 71 detects the data of the patch, and supplies the detection result to the colorimeter 72. Then, the colorimeter 72 calculates the detection result to obtain TRC, _{MXYZ_mr} , and wtpt.

Each element of _{MXYZ_mr} can be obtained from the following equation. _{X mr = (X r, D50} / X a, mw) X a = (X r, D50 / X r, mw) X r Y mr = (Y r, D50 / Y a, mw) Y a = (Y r _{, D50 / Y r, mw)} Y r Z mr = (Z r, D50 / Z a, mw) Z a = (Z r, D50 / Z r, mw) Z r (32)

In the above formula, (X _a , Y _a ,
Z _a ) represents an absolute tristimulus value, (X _r , Y _r , Z _r ) represents a relative tristimulus value, and (X _{a, mw , Ya} , _mw , Z)
_{a, mw} ) is the absolute tristimulus value of white as ( _{Xr , mw} , _Yr , _mw , Z
_{r, mw} ) respectively represent relative tristimulus values of white. _{Further, (X r, D50, Y} r, D50, Z r, D50) represents the relative tristimulus values of the light source D50, specifically, (0.9642,1.
0000, 0.8249).

Next, the conversion process of the color adaptation model conversion circuit 34 in step S4 of FIG. 17 will be described with reference to the flowchart of FIG. As shown in the figure,
In this example, the input profiles 32A to TRC, M
_{XYZ_mr} and wtpt are input, and the visual environment parameter input unit 35
Ambient light L ₁ of the chromaticity (x _sur, y _sur) and a, absolute luminance Y _a of the ambient light L _{1, sur,} and absolute luminance Y _a of CRT _{41, mon} is input. What is generated and output is the update data TRC ', _{M'XYZ_mr} , wtpt' of the input profile 32A.

First, it is assumed that image data (dr, dg, db) has been generated in step S11. The data (dr, dg, db) is obtained by normalizing the values of (R, G, B) output from the CRT 41 so that the maximum values are respectively 1.

Next, in step S12, by applying the TRC read from the input profile 32A to the data (dr, dg, db) generated in step S11, (r, g, b) is expressed by the following equation. Is calculated as follows. r = rTRC [dr] 0 ≦ dr ≦ 10 0 ≦ r ≦ 1 g = gTRC [dg] 0 ≦ dg ≦ 1 0 ≦ g ≦ 1 b = bTRC [db] 0 ≦ db ≦ 1 0 ≦ b ≦ 1 (33 )

As a result, data (r, g, b) in which the relationship between the RGB data output from the CRT 41 and the light quantity is linearized is obtained.

Next, after step S13, step S13
At 14, the data (r, g, b) of step S12
From computed data _{(X 'a, Y' a} , Z 'a) a.

That is, from the data (r, g, b) linearized as shown by the equation (33), the data (X, Y,
To determine Z), the media relative tristimulus values of the RGB phosphors, as shown in the following equation, are read. rXYZ: (X _{mr, red} , Y _{mr, red} , Z _{mr, red} ) gXYZ: (X _{mr, green} , Y _{mr, green} , Z _{mr, green} ) bXYZ: (X _{mr, blue} , Y _{mr, blue} , Z _{mr, blue} ) (34)

Further, a relative tristimulus value of a white point, which is required to convert the media relative tristimulus value into an absolute tristimulus value and is represented by the following equation, is read. _{wtpt: (X r, mw,} Y r, mw, z r, mw) (35)

Here, wtpt is the white point of the CRT 41, and the above equation (35) is set as the following equation. ( _{Xr, mon} , _{Yr, mon} (= 1), _{Zr, mon} ) (36)

As a result, the absolute tristimulus value of CRT41 was Y
It can be expressed by the following equation using _{a and mon} . _{X a, mon = X r,} mon · Y a, mon Y a, mon = Y r, mon · Y a, mon (= Y a, mon) Z a, mon = Z r, mon · Y a, mon ( 37)

From the above equations (32), (36) and (37), the following equation is obtained.

[0355]

(Equation 32)

(X _{a, red} , Ya _{, red} ,
Z _{a, red} ) represents the absolute tristimulus value of the R phosphor, and (X
_{a, green} , Ya _{, green} , Za _{, green} ) represent the absolute tristimulus values of the G phosphor, and ( _{Xa, blue} , Ya _{, blue} , Za _{, blue} )
Represents the absolute tristimulus value of the B phosphor.

Therefore, the matrix represented by the absolute tristimulus values is as follows.

[0358]

[Equation 33]

Here, as shown in the following equation, the term on the right side in equation (39) is _{MXYZ_a} .

[0360]

(Equation 34)

Therefore, the absolute tristimulus values output from the CRT 41 can be expressed as follows.

[0362]

(Equation 35)

Here, M _{XYZ_a} represents a matrix for _obtaining absolute tristimulus values from (r, g, b), and (X _{a, (CRT)} , Y
_{a, (CRT)} , Z _{a, (CRT)} ) represent absolute tristimulus values output from the _CRT 41.

[0364] The suffix (CRT) indicates that the data is output from the CRT 41, and () indicates that it is a variable. Hereinafter, symbols without parentheses indicate constants.

When the luminance of the ambient light L ₁ increases, C
The contrast of the soft copy image of the RT41 decreases. This is primarily due to the floats black by reflected ambient light L ₁ onto the tube surface of the CRT 41. Usually CRT41
Although the anti-reflection film is formed on, as long as there is ambient light L _1, the black can be reproduced on the CRT 41, it is impossible to darker than the reflected light. To account for the reflected light, as shown in the following equation, the reflection component of the ambient light L ₁ is added as an offset to the light emitted from the RGB phosphors.

[0366]

[Equation 36]

[0367] R _bk represents the reflectance on the tube surface of the CRT 41,
Usually, it is a value of 1% to 5%. (X _{a , sur} , Y _{a, sur} , Z
_{a, sur)} represents the absolute tristimulus values of the ambient light L _1. (X '
_{a, (CRT)} , Y ' _{a, (CRT)} , Z' _{a, (CRT)} )
Represents the absolute tristimulus value of RT41.

The absolute tristimulus value of the ambient light L ₁ can be obtained from the visual environment parameters input from the visual environment parameter input unit 35 as follows.

[0369]

(37)

Here, (r ₀ , g ₀ , b ₀ ) is defined so that the following equation is satisfied.

[0371]

(38)

The equation (42) can be modified from the equations (41) and (44) as follows.

[0373]

[Equation 39]

Incidentally, the TRC needs to be represented by a value between 0 and 1 in the ICC Profile Format. Therefore, in order to normalize each of the maximum values of (r + r ₀ ), (g + g ₀ ), and (b + b ₀ ) to 1,
(R ', g', b ') is defined as follows. r ′ = (r + r ₀ ) / (1 + r ₀ ) g ′ = (g + g ₀ ) / (1 + g ₀ ) b ′ = (b + b ₀ ) / (1 + b ₀ ) (46)

Here, the following equation is established from the equation (33). r '= (rTRC [dr] + r 0) / (1 + r 0) g' = (gTRC [dg] + g 0) / (1 + g 0) b '= (bTRC [db] + b 0) / (1 + b 0) (47 )

Next, TRC ′ is defined as shown by the following equation. rTRC '[dr] = (rTRC [dr] + r 0) / (1 + r 0) gTRC' [dg] = (gTRC [dg] + g 0) / (1 + g 0) bTRC '[db] = (bTRC [db] + b _{0) / (1 + b 0} ) (48)

As a result, the following equation holds, and the ICC Profile Fo
The format of rmat is satisfied. r ′ = rTRC ′ [dr] 0 ≦ dr ≦ 10 0 ≦ r ′ ≦ 1 g ′ = gTRC ′ [dg] 0 ≦ dg ≦ 10 0 ≦ g ′ ≦ 1 b ′ = bTRC ′ [db] 0 ≦ db ≦ 10 ≦ b ′ ≦ 1 (49)

The following equation holds from the above equation (46). r + r ₀ = (1 + r ₀ ) · r ′ g + g ₀ = (1 + g ₀ ) · g ′ b + b ₀ = (1 + b ₀ ) · b ′ (50)

Also, _{MTCR_n} is defined as shown by the following equation.

[0380]

(Equation 40)

At this time, the above equation (45) is expressed as follows from the equations (50) and (51).

[0382]

[Equation 41]

[0383] In this equation (52), step S1 in FIG.
4 will be obtained.

Next, normalization is performed so that the maximum value of Y ′ _{a, (CRT) becomes} 1. The maximum value is _{Y'a, mon} , and this value is (5
In the expression (2), the absolute tristimulus value when r ′ = g ′ = b ′ = 1 is meant, so the following expression is established from the expression (52).

[0385]

(Equation 42)

From equation (53), Y ′ _{a, mon} is obtained. Therefore, the following equation is calculated in step S15 in FIG.

[0387]

[Equation 43]

Next, using the equation (52) (Hunt-Pointer-Estevez conversion), conversion from tristimulus values to cone signals is performed. That is, the following equation is calculated in step S16.

[0389]

[Equation 44]

Here, _MEHP is defined as shown in the following equation.

[0391]

[Equation 45]

By the way, in human vision, the signal of each cone is normalized by the value of its white point so that the light source becomes white. Therefore, in the model of this embodiment, the von Kries adaptation rule is basically used.However, the white point at which human vision is adapted may not be obtained by using the chromaticity of the light source as it is. Instead, as shown below, it is obtained from two steps of incomplete adaptation and partial adaptation.

First, the incomplete adaptation will be described.
When observing the image on CRT41, human vision is
Try to adapt to the white point of 1
Even if T41 is observed, if its white point is far from D65, human vision cannot completely adapt to the white point of CRT41. The chromaticity of the white point is D6
The further away from the 5 (or E) light source and the lower the brightness of the adaptation point, the less perfect the adaptation. Incompletely adapted white points (L' _n , _M'n ,
S ′ _n ) is obtained from the following equation. _{L 'n = L n / p} L M' n = M n / p M S 'n = S n / p S (57)

Note that p _L , p _M , p
_S is the chromatic adaptation coefficient used in Hunt's model,
It can be obtained from the following equation.

[0395]

[Equation 46]

In the above formula, Y ′_{a, mon}Is the white color of CRT41
Absolute luminance (cd / m ^Two).

In the above equation, l _E , m _E , and s _E are
It can be obtained from the following equation. l _E = 3 · L _n / (L _n + M _n + S _n ) m _E = 3 · M _n / (L _n + M _n + S _n ) s _E = 3 · S _n / (L _n + M _n + S _n ) (59) )

Note that (L _n , M _n , S _n ) is the white point of the CRT 41, ie, r ′ in the equations (52) and (54).
= G ′ = b ′ = 1, the relative tristimulus value is (X
_{r, mon} , _{Yr , mon} , _{Zr, mon} ), which is converted into a cone signal using _MEHP, and can be obtained from the following equation.

[0399]

[Equation 47]

Next, mixing adaptation will be described.
When observing the image on 41, it is rarely seen in a dark room, and in an ordinary office, it is often seen under a fluorescent lamp having a color temperature (CCT) of about 4150K. Also,
The CCT of the white point of a commonly used CG monitor is
It is about 9300K. As described above, when the white point of the CRT 41 and the surrounding color temperature are significantly different, it can be considered that human vision partially adapts to both. Therefore, the white point to which human vision is actually adapted is considered to be intermediate between the two. Therefore, the ratio (adaptation rate) of the human vision adapting to the white point of the CRT 41 is defined as R _adp, and the white point (L ″ _n ,
M " _n , S" _n ) are defined as follows.

[0401]

[Equation 48]

(L _sur , M _sur , S _sur ) is (4 _sur
When the absolute tristimulus value of the ambient light is converted into the relative tristimulus value from the expression 3), the following is obtained. _{Xr, sur} = _{Xa, sur} / Ya _{, sur Yr, sur} = Ya _{, sur} / Ya _{, sur} (= 1) _{Zr, sur} = Za _{, sur} / Ya _{, sur} (62)

Further, as a result obtained by the above equation (62),
In step S16, when the conversion into a cone signal is performed using _MEHP , the following values are obtained.

[0404]

[Equation 49]

According to the visual perception experiment, the adaptation rate R
_The most favorable results were obtained when _adp was a value between 0.4 and 0.7, especially 0.6.

Here, the following equation is obtained by substituting the adaptive white point obtained in the above two steps into the von Kries adaptation rule.

[0407]

[Equation 50]

From this equation, the calculation in step S17 is performed.

Here, M _von-K is defined as shown by the following equation.

[0410]

(Equation 51)

[0411] In step S18 in Fig. 22, the Hunt-Point
Using the er-Estevez inverse matrix transformation, the conversion from the signal of the cone to the tristimulus value is performed as shown in the following equation.

[0412]

(Equation 52)

[0413] Here, the following equation is defined.

[0414]

(Equation 53)

Next, a conversion process to media relative tristimulus values is performed according to the above equation (32). First, the following equation is obtained by substituting the adaptive white point (L " _n , M" _n , S " _n ) into equation (64).

[0416]

(Equation 54)

Further, by converting this into tristimulus values, the following equation is obtained.

[0418]

[Equation 55]

Therefore, the following equation is established.

[0420]

[Equation 56]

The following equation is defined here.

[0422]

[Equation 57]

The calculation according to the equation (70) is performed in step S19 in FIG.

The above steps S11 to S19
In summary, the image data (dr, dg, db)
The profile can be rewritten without depending on the profile, as shown in steps S21 to S23.

That is, the new rTRC ′, gTRC ′, and bTRC ′ are expressed as a function or a conversion table by (48)
It can be obtained from the equation as follows. rTRC ′ [dr] = (rTRC [dr] + r ₀ ) / (1 + r ₀ ) gTRC ′ [dg] = (gTRC [dg] + g ₀ ) / (1 + g ₀ ) bTRC ′ [db] = (bTRC [db] + b _{0) / (1 + b 0} ) (72)

R ₀ , g ₀ , and b ₀ are calculated by using Equation (43) and (44)
From the equation, it is expressed by the following equation.

[0427]

[Equation 58]

The value represented by the equation (72) is used as update data TRC ′ for the TRC of the input profile 32A.

Further, the output (r ', g',
The conversion from b ′) to the media relative tristimulus value is represented by the following equation using a chromatic adaptation model.

[0430]

[Equation 59]

The following equation is defined from the above equation.

[0432]

[Equation 60]

The following equation is defined from equation (75).

[0434]

[Equation 61]

M ′ _{XYZ_mr} shown in the equation (76) is _used as update data of the data M _{XYZ_mr} of the input profile 32A.

At this time, the media relative tristimulus values of the RGB phosphor are as follows. rXYZ ': (X' _{mr, red} , Y ' _{mr, red} , Z' _{mr, red} ) gXYZ ': (X' _{mr, green} , Y ' _{mr, green} , Z' _{mr, green} ) bXYZ ': (X' _{mr, blue} , Y ' _{mr, blue} , Z' _{mr, blue} ) (77)

Further, a new white point ICC Profile Form
Regarding the absolute tristimulus value at at (relative tristimulus value), (6
Equation 9) is as follows.

[0438]

(Equation 62)

This value is the value of wtpt of the input profile 32A.
Update data wtpt '.

As described above, the image processing unit 3 shown in FIG.
1, the input profile 32A of the conversion unit 32 is updated.

FIG. 23 shows the flow of data that changes as a result of processing in the image processing section 31. That is, as shown in FIG. 23, the RGB data D11 from the CRT 41 is
XYZ based on the input profile 32A of the conversion unit 32
It is converted to data D12. This data corresponds to the data generated in step S14 of FIG. Then, the XYZ data D12 is converted into L ⁺ M ⁺ S ⁺ data D13 based on the visual environment parameters. This data corresponds to the data generated in step S17 in FIG. And this data is further X ⁺ _mr Y ⁺ _mr Z ⁺ _mr
It is converted to data D14. This data corresponds to the data generated in step S19 in FIG. This data is the PCS (Profile Connection Space) 61 in FIG.
Is transmitted to the conversion unit 33 via

The conversion unit 33 receives this data as data D15, and receives it as data L ⁺ M ⁺ S ⁺ data D15.
Convert to 16. Further, this data is converted into XYZ data D17 in accordance with the viewing environment parameters of the printer 42, and this data is output to the output profile 33.
A is further converted into RGB data D18 in accordance with A.

The conversion units 32 and 33 shown in FIGS. 15 and 16 are substantially constituted by a computer as shown in FIG.

In the image processing system shown in FIGS. 15 and 16, the input profile 32
Although A is rewritten, it is also possible to rewrite the output profile 33A of the conversion unit 33. FIG. 24 shows a configuration example in this case.

That is, in the configuration example of FIG. 24, the chromatic adaptation model for rewriting the output profile 33A is provided in the same manner as the chromatic adaptation model conversion circuit 34 for rewriting the input profile 32A and the visual environment parameter input section 35 are provided. A model conversion circuit 91 and a visual environment parameter input unit 92 are provided. Visual environment parameter input unit 92
Performs the same operation as the visual environment parameter input unit 35,
Further, the color adaptation model conversion circuit 91 performs the same processing as that of the color adaptation model conversion circuit 34. Thereby, the output profile 33A can be updated similarly to the input profile 32A.

FIGS. 25 to 29 show the data flow in the above embodiment. FIG. 25 shows the embodiment of FIG. 2 and FIG. 26 shows the embodiment of FIG.
Corresponds to the embodiment of FIG. 10, FIG. 28 corresponds to the embodiment of FIG. 11, and FIG. 29 corresponds to the embodiment of FIG.

That is, in the system shown in FIG.
The image processing unit 11, the image data I _in, device profile data D _in, and viewing condition parameters (ambient data) V _in is input, the image processing unit 1-1,
Based on these data, image data I ″ independent of the visual environment and the device is generated, and is generated by the image processing unit 1-1.
Output to 2.

The image processing unit 1-2 receives the device profile data D _out and the surrounding environment data V _out, and the image processing unit 1-2 uses these data to
Process image data I '' to generate image data I _out ,
Output.

[0449] In the system of FIG. 26, the image processing unit 11, the image data I _in, device profile data D _in, and the surrounding environmental data V _in is inputted.
The image processing section 1-1 is also supplied with device profile data D _out and surrounding environment data V _out from the image processing section 1-2. The image processing unit 1-1 the device profile data D _in, using the ambient environmental data V _in, device profile data D _out, and the surrounding environmental data V _out, to process the image data I _in, the image data I _out Generate and output to the image processing unit 1-2. The image processing unit 1-2 supplies the image data _Iout to the output device.

[0450] In the system of FIG. 27, the image processing unit 1-1, the input image data I _in, device profile data D _in, and the surrounding environmental data V _in, to the picture processing unit 1-2 .

The image processing section 1-2 also receives device profile data D _out and ambient environment data V _out . The image processing unit 1-2, the device profile data D _{i n,} utilizes the surrounding environmental data V _in, device profile data D _out, and the surrounding environmental data V _out, to process the image data I _in, the image data I _out Generate

[0452] In the system of FIG. 28, the image processing unit 11, the image data I _in, device profile data D _in, and the surrounding environmental data V _in is inputted.
The image processing unit 1-2 receives the input surrounding environment data V _out
Is output as it is to the image processing unit 1-1. The image processing unit 1-1 utilizes the device profile data D _in, surrounding environmental data V _in, and the surrounding environmental data V _out, to process the image data I _in, and generates the image data I 'device-independent , To the image processing unit 1-2.

[0453] The image processing unit 1-2 converts the input image data I 'into the input device profile data D.
_{Using out} , the image data is converted into image data I _out and output.

[0454] In the system of FIG. 29, the image processing unit 11, the image data I _in, device profile data D _in, are inputted surrounding environmental data V _in, the image processing unit 1-1, the device profile Utilizing the data D _in , it generates device-independent image data I ′ from the image data I _in and outputs it to the image processing unit 1-2. Further, the image processing unit 11 outputs the surrounding environmental data V _in, as it is to the image processing unit 1-2.

[0455] The image processing unit 1-2 utilizes surrounding environmental data V _in, device profile data D _{ou t,} and the surrounding environmental data V _out, to process the image data I ', and generates an image data I _out ,Output.

In the image processing units 1-1 and 1-2, which data is applied to which data is input, that is, the combination of the data is arbitrary.
In the embodiment of FIGS. 9 to 12, FIG.
34 to 34, the combinations are performed.

[0457] That is, in the system of FIG. 30 (corresponding to FIG. 2 and FIG. 25), the image data I _in, device profile data D _in, the image data generated by applying the converter 11, the viewing environment conversion in the circuit 12, it is converted into the surrounding environment by referring to the data V _in, the image data I 'which does not depend on the viewing environment and the devices'.

In the image processing device 1-2, the visual environment conversion circuit 15 applies
The converter 16 converts the image data generated by applying the ambient environment data V _out into image data I _out by applying the device profile data D _out .

[0459] In the system of FIG. 31 (corresponding to FIGS. 9 and 26), the converter 11 of the image processing unit 11, the image data I _in, the image data by applying the device profile data D _in Generate And
On the image data, the viewing environment conversion circuit 12 applies the surrounding environmental data V _in. Furthermore, in the viewing condition conversion circuit 15, the output of the viewing environment conversion circuit 12, the image data generated by applying the surrounding environmental data V _{ou t,} the converter 16 applies the surrounding environmental data D _out, It is converted to image data _Iout . Therefore, in this case, the image processing unit 1-2 sets the input image data I
_out , the device profile data D _out , and the surrounding environment data V _out are simply output as they are.

[0460] In the system of FIG. 32 (corresponding to FIG. 10 and FIG. 27), the image processing unit 1-1, the input image data I _in, device profile data D _in, and the surrounding environmental data V _in, The data is output to the image processing unit 1-2 as it is. In the image processing unit 1-2, the converter 1
1 applies the device profile data D _in to the image data I _{in and} outputs the output to the visual environment conversion circuit 12. Viewing environment conversion circuit 12 subjects the image data from converter 11, and supplies the image data generated by applying the surrounding environmental data V _in, the viewing condition conversion circuit 15. The visual environment conversion circuit 15 outputs to the converter 16 image data generated by applying the surrounding environment data _Vout to the input image data. Converter 16
Is the input image data, applies the device profile data D _out, and generates the image data I _{o ut.}

In the system shown in FIG. 33 (corresponding to FIGS. 11 and 28), in the image processing section 1-1, the converter 11 generates the image data I _in by applying the device profile data D _in to the image data I _in . The output image data is output to the viewing environment conversion circuit 12. The visual environment conversion circuit 12
The input image data, by applying the surrounding environmental data V _in, and outputs the viewing condition conversion circuit 15. The viewing environment conversion circuit 15 applies the surrounding environment data V _out to the input image data, generates device-independent image data I ′, and outputs the generated image data I ′ to the image processing unit 1-2.

In the image processing section 1-2, the converter 16 applies the device profile data D _out to the input image data I ′ to generate the image data I _out.
Generate

In the system shown in FIG. 34 (corresponding to FIGS. 12 and 29), in the image processing section 1-1, the converter 11 applies the device profile data D _in to the image data I _in The device-independent image data I ′ is generated. The image data I 'is the viewing environment conversion circuit 12 of the image processing unit 1-2, using the surrounding environmental data V _in supplied from the image processing unit 11, the image data in consideration of the surrounding environment data It is converted and input to the visual environment conversion circuit 15. The visual environment conversion circuit 15 converts the input image data into the surrounding environment data V
_out is applied to generate new image data, which is output to the converter 16. The converter 16 converts the input image data into device profile data D
_out is applied to generate image data I _out .

However, as shown in FIGS. 25 to 29, the combination of the processes in the image processing units 1-1 and 1-2 is arbitrary.

[0465] For example, in the system of FIG. 30, the image processing unit 11, the image data I _in, the image data generated by applying the device profile data D _in, surrounding environmental data V _in Although so as to apply, this example, after summarizing the device profile data D _in and the surrounding environmental data V _in advance into one data, or applied to the image data I _in, the image data I _in
After applying the surrounding environmental data V _in the may be applying the device profile data D _in.

However, as in the systems shown in FIGS. 15, 16 and 24, the configuration is such that ambient environment data is applied to profile data and the profile is rewritten to a profile independent of the ambient environment. Thus, it is possible to realize a system that matches the appearance of colors using the existing ICC CMS. This example is shown in FIGS.

FIG. 35 shows an example in which the existing system shown in FIG. 43 is used. Figure in 35 systems, color adaptation model conversion circuit 802 of the image processing section 801, the device profile data D _in, by applying the surrounding environmental data V _in, device profile data D in consideration of the surrounding environment data ' It is rewritten to _in. The device profile data D _'in is supplied to the image processing unit 601 together with the image data I _in. As described with reference to FIG. 43, the converter 602 of the image processing unit 601 includes:
A CMS that supplies image data I _in and device profile data D _in to generate device-independent image data I ′ already exists. Therefore, the image processing unit 60
1, in place of the device profile data D _in, 'by supplying _in, from the converter 602, the image data I which does not depend on the viewing environment and the devices' device profile data D can generate', is output.

[0468] Similarly, in the image processing unit 803, in the color adaptation model conversion circuit 804, the device profile data D _out, rewritten in consideration of the surrounding environmental data V _out, generating a new device profile data D _'out . Then, the device profile data D ′
_out is supplied to the image processing unit 603 in FIG. 43 instead of the device profile data D _out, and the converter 604 of the image processing unit 603 outputs the device profile data D ′ to the image data I ″. _{ou t}
Is applied to generate and output image data _Iout .

FIG. 36 shows an example in which the existing system shown in FIG. 44 is used. In the system shown in FIG. 36, the image processing unit 811 uses the color adaptation model conversion circuit 8
By 12, the device profile data D _in, rewriting based on the surrounding environmental data V _in, is generating device profile data D _'in not dependent on the surrounding environmental data. Then, the device profile data D ′
The _in, the image processing unit 612 shown in FIG. 44, instead of the device profile data D _in, if to supply together with the image data I _in, the existing image processing unit 612, as in the case shown in FIG. 44 Is performed.

That is, the converter 613 supplies the image data generated by applying the device profile data D ′ _in to the image data I _in to the converter 614. The converter 614, the color adaptation model conversion circuit 814 of the image processing unit 813, device profile data D _'out of the device profile data D _out is rewritten based on the surrounding environmental data V _out is supplied. The converter 614 applies the device profile data D' _out to the image data input from the converter 613 to generate and output image data _Iout .

FIG. 37 shows an example in which the existing system shown in FIG. 45 is used. In the system of FIG. 37, the color adaptation model conversion circuit 822 of the image processing section 821, the device profile data D _in, by applying the surrounding environmental data V _in, is generating device profile data D _'in . This device profile data D ' _in
Is supplied to the image processing unit 621 shown in FIG. 45 together with the image data I _in instead of the device profile data D _in . Further, the device profile data D _out is rewritten by the color adaptation model conversion circuit 824 of the image processing unit 823 based on the surrounding environment data V _out ,
Generate device profile data D' _out . The device profile data D ' _in and D' _out are
The image processing unit 621 in FIG. 45, so as to supply in place of the device profile data D _in and D _out. As a result, the converter 622 of the existing image processing unit 621
Is the device profile data D ′ _in the image data I _in
In is applied to output to the converter 623, and the converter 623 applies the device profile data D' _out to the input image data to generate image data _Iout .

In the systems shown in FIGS. 35 to 37, if the image processing units 601, 603, 612, and 621 are constituted by, for example, personal computers or the like, the image processing units 801, 804, 811, 813, 82
1, 823 and the like can be configured by a scanner, a video camera, a printer, or the like.

In the above description, the case where the present invention is applied to the CMS of ICC has been described as an example.
It is also possible to apply to MS.

[0474] Examples of the providing medium for providing the user with the computer program for performing the above-described processing include:
In addition to recording media such as magnetic disks, CD-ROMs, and solid-state memories, communication media such as networks and satellites can be used.

[0475]

According to the transmission apparatus of the first aspect, the transmission method of the fifth aspect, and the providing medium of the sixth aspect, parameters of a visual environment for observing an image input from an input device. According to, the image data input by the input device is converted into index data of appearance corresponding to the color appearance under the visual environment, and the obtained index data of appearance is transmitted via the transmission medium. In addition, it is possible to transmit image data corrected according to the viewing environment of the transmission side to the reception side.

According to the transmitting apparatus of the present invention, the transmitting method of the present invention, and the providing medium of the ninth aspect, according to the parameters of the visual environment for observing the image input from the input device. The image data input by the input device is converted into visual index data corresponding to the color appearance under the visual environment, and according to the parameters of the visual environment on the receiving side, the image output from the output device on the receiving side is converted. The index data is converted so that the color appearance matches the color appearance of the image input from the input device, and the obtained data is transmitted through the transmission medium. It is not necessary to perform a correction process, and as a result, it is possible to simplify information processing on the receiving side.

The transmitting device according to claim 10, wherein the transmitting device is
According to the transmission method described in the above and the providing medium according to the twelfth aspect, since the image input from the input device and the input parameters of the viewing environment are transmitted,
It is not necessary to perform a correction process on the viewing environment on the transmission side, and as a result, it is possible to simplify information processing on the transmission side.

[0478] The receiving apparatus according to the thirteenth aspect, the seventeenth aspect.
According to the receiving method described in the above, and according to the providing medium described in the claim 18, the color appearance of the image displayed and output to the output device according to the input visual environment parameters, from the input device on the transmission side The received image data is converted to match the color appearance of the input image, and the converted image data is output to the output device. Correction processing can be performed on the data, and as a result, it becomes possible to display an image having the same color appearance on the transmission side and the reception side.

[0479] The receiving apparatus according to claim 19, and the twentieth aspect.
According to the receiving method described in the above, and the providing medium according to the claim 21, the parameters of the viewing environment for observing the image displayed and output on the output device are transmitted to the transmitting side, and the image data transmitted from the transmitting side Is received and the received image data is output to the output device, so that the parameters of the viewing environment of the transmission side can be transmitted to the reception side together with the image data. An image having the same color appearance as that of the image displayed on the device can be displayed on the output device on the receiving side.

[0480] The receiving apparatus according to claim 22, and claim 23.
According to the receiving method described in the above, and the providing medium described in the claim 24, receiving the image data transmitted from the transmitting side and the parameters of the viewing environment of the transmitting side, according to the received parameters of the viewing environment The image data is converted into appearance index data corresponding to the color appearance under the visual environment, and the image output from the output device is output according to the parameters of the visual environment for observing the image displayed and output on the output device. The index data is converted so that the color appearance matches the color appearance of the image input from the input device on the transmission side, and the obtained image data is output to the output device. Since it is not necessary to execute the correction process according to the visual environment in (1), the information processing on the transmission side can be simplified.

According to the image processing system of the twenty-fifth aspect, the receiving method of the twenty-sixth aspect, and the providing medium of the twenty-seventh aspect, the transmitting side is configured to observe the image input from the input device. According to the parameters of the environment, the image data input by the input device is converted into index data of appearance corresponding to the color appearance under the visual environment, and the obtained index data of appearance is transmitted via the transmission medium, On the receiving side, the index data transmitted through the transmission medium is received, and the color of the image displayed and output on the output device is determined according to the parameter of the visual environment in which the image displayed and output on the output device is observed. The received index data is converted so that the appearance of the image matches the color appearance of the image input from the input device on the transmitting side, and the converted image data is output to the output device. Since such forces, it is possible to reduce the color appearance of the image input from the input device on the transmission side, the difference in color appearance of the image output from the receiving side of the output device.

According to the image processing system described in claim 28, the image processing method described in claim 29, and the providing medium described in claim 30, the transmission side observes an image input from the input device. According to the parameters of the visual environment, the image data input by the input device is converted into visual index data corresponding to the color appearance under the visual environment,
Depending on the parameters of the viewing environment of the receiving side that observes the image displayed and output to the output device, the color appearance of the image displayed and output on the output device is the same as the color appearance of the image input from the input device. The index data is converted to match, the obtained data is transmitted via the transmission medium, and the receiving side receives the data transmitted via the transmission medium, and transmits the received data to the output device. Output
Since the parameters of the viewing environment for observing the image displayed and output on the output device are transmitted to the transmission side, the color appearance of the image input from the input device on the transmission side and the output of the reception side It is possible to reduce the difference in the color appearance of the image output from the device.

According to the image processing system described in claim 31, the image processing method described in claim 32, and the providing medium described in claim 33, on the transmitting side, the image input from the input device and the input The receiving side receives the image data transmitted from the transmitting side and the parameters of the transmitting side viewing environment, and receives the image data according to the received viewing environment parameters. Is converted into appearance index data corresponding to the color appearance under the visual environment, and the color appearance of the image output from the output device is changed according to the parameters of the visual environment for observing the image displayed and output on the output device. , Convert the index data to match the color appearance of the image input from the input device on the transmitting side,
Since the obtained image data is output to the output device, an image obtained by performing a correction process according to the viewing environment of the transmitting side and the receiving side on the receiving side is displayed. This makes it possible to reduce the difference between the color appearance of the image input from the input device on the transmission side and the color appearance of the image output from the output device on the reception side.

An image data processing apparatus according to claim 34,
According to the image data processing method according to claim 37 and the providing medium according to claim 38, a profile for converting DDC image data into DIC image data in accordance with the captured viewing environment parameters, Alternatively, since a profile for converting DIC image data to DDC image data is rewritten, it is possible to use the conventional image processing system as it is and to match different image colors.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an outline of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a first embodiment of a transmission / reception device to which the present invention has been applied.

FIG. 3 is a diagram illustrating a flow of a process according to the embodiment shown in FIG. 1;

FIG. 4 is a diagram illustrating the results of an investigation experiment on the relationship between the degree of matching of the color appearance of the soft copy image on the transmitting side and the degree of matching in the color appearance of the receiving side when the proportional adaptation coefficient _Radp is changed.

FIG. 5 is a diagram showing the results of the investigation experiment shown in FIG.

FIG. 6 is a block diagram illustrating a configuration example when a parameter setting circuit is used instead of the sensor according to the embodiment shown in FIG. 1;

FIG. 7 is a diagram illustrating a display example of a parameter setting screen.

FIG. 8 is a block diagram illustrating a configuration of a second embodiment of the transmission / reception apparatus to which the present invention has been applied.

FIG. 9 is a block diagram illustrating a configuration of a third embodiment of a transmission / reception device to which the present invention has been applied.

FIG. 10 is a block diagram illustrating a configuration of a fourth embodiment of a transmission / reception apparatus to which the present invention has been applied.

FIG. 11 is a block diagram illustrating a configuration of a fifth embodiment of a transmission / reception apparatus to which the present invention has been applied.

FIG. 12 is a block diagram illustrating a configuration of a sixth embodiment of the transmission / reception device to which the present invention has been applied.

FIG. 13 is a block diagram illustrating a configuration of a seventh embodiment of a transmission / reception apparatus to which the present invention has been applied.

FIG. 14 is a block diagram illustrating a configuration example of a computer that realizes the transmission / reception device of the present invention.

FIG. 15 is a block diagram illustrating a configuration example of an image processing system to which the present invention has been applied.

FIG. 16 is a block diagram illustrating a configuration example of an image processing system to which the present invention has been applied.

FIG. 17 is a flowchart illustrating a process of the configuration example of FIG. 16;

FIG. 18 is a diagram illustrating an ICC Profile Format.

FIG. 19 is a diagram illustrating a display example of the contents of an ICC profile format.

FIG. 20 is a diagram illustrating an example of an input screen for viewing environment parameters.

FIG. 21 is a diagram illustrating a method for measuring a color patch.

FIG. 22 is a flowchart illustrating a detailed process of step S4 in FIG. 17;

23 is a diagram illustrating data processing in the system of FIG.

FIG. 24 is a block diagram illustrating another configuration example of an image processing system to which the present invention has been applied.

FIG. 25 is a diagram for explaining a data flow of the CMS.

FIG. 26 is a diagram for explaining a data flow of the CMS.

FIG. 27 is a diagram illustrating the flow of data in the CMS.

FIG. 28 is a diagram illustrating the flow of data in the CMS.

FIG. 29 is a diagram illustrating the flow of data in the CMS.

FIG. 30 is a diagram for explaining a data flow of the CMS.

FIG. 31 is a diagram illustrating the flow of data in the CMS.

FIG. 32 is a diagram for explaining a data flow of the CMS.

FIG. 33 is a diagram illustrating the flow of data in the CMS.

FIG. 34 is a diagram for explaining a data flow of the CMS.

FIG. 35 is a diagram illustrating the flow of data in the CMS.

FIG. 36 is a diagram for explaining a data flow of the CMS.

FIG. 37 is a diagram illustrating the flow of data in the CMS.

FIG. 38 is a diagram illustrating a configuration example of a conventional image processing system.

39 is a diagram illustrating a flow of image data in the image processing system illustrated in FIG. 38.

40 is a diagram illustrating a configuration example of a mapping unit illustrated in FIG. 38.

FIG. 41 is a block diagram showing another example of the configuration of a conventional image processing system.

42 is a diagram illustrating the operation of the configuration example of FIG. 41.

FIG. 43 is a diagram illustrating the flow of data in a conventional image processing system.

FIG. 44 is a diagram illustrating a data flow in a conventional image processing system.

FIG. 45 is a diagram illustrating a data flow in a conventional image processing system.

FIG. 46 is a diagram illustrating an image between different apparatuses in the related art.

FIG. 47 is a diagram illustrating an image between different conventional devices.

FIG. 48 is a diagram illustrating an image between different apparatuses in the related art.

[Explanation of symbols]

S ₁ , S ₂ , S ₃ , S ₄ sensors, 11 converters,
12 visual environment conversion circuit, 13 image editing processing circuit,
14 image editing processing circuit, 15 visual environment conversion circuit,
16 converter, 17 parameter setting circuit, 1
8 parameter setting circuit, 20 printer, 31
Image processing unit, 32 conversion unit, 32A input profile, 33 conversion unit, 33A output profile,
34 color adaptation model conversion circuit, 35 visual environment parameter input section, 41 CRT, 42 printer, 43 print paper

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 9/64 G06F 15/66 310 9/67 H04N 1/46 Z

Claims (38)

[Claims] 1. A transmission apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a transmission environment for observing the image input from the input device is provided. Input means for inputting a parameter, and image data input by the input device in accordance with the parameter of the visual environment input from the input means, visual index data corresponding to color appearance under the visual environment A transmission device, comprising: a conversion unit that converts the data into an index; and a transmission unit that transmits the visual index data output from the conversion unit via the transmission medium. 2. The transmitting apparatus according to claim 1, wherein the input device outputs the soft copy image by emitting light by itself. 3. The image processing apparatus according to claim 2, wherein the conversion unit is one of the elements of the visual environment.
3. The transmitting apparatus according to claim 2, wherein a correction process is performed on the contrast of the soft copy image due to the influence of ambient light. 4. The image processing apparatus according to claim 1, wherein the conversion unit is one of the elements of the visual environment.
The transmitting apparatus according to claim 1, wherein a correction process for human chromatic adaptation is performed according to the luminance of ambient light. 5. A transmission method for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a visual environment for observing the image input from the input device is provided. An input step in which a parameter is input, and image data input by the input device according to a parameter of the visual environment input from the input step, an appearance index data corresponding to a color appearance under the visual environment. And a transmitting step of transmitting the appearance index data output from the converting step via the transmission medium. 6. A computer program for use in a transmission device for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein the image input from the input device is provided. An input step in which a parameter of a visual environment for observing the image is input, and in accordance with the parameter of the visual environment input from the input step, image data input by the input device is converted into a color appearance under the visual environment. A providing medium, comprising: a conversion step of converting the appearance index data into a corresponding appearance index data; and a transmission step of transmitting the appearance index data output from the conversion step via the transmission medium. . 7. A transmitting apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a transmission environment for observing the image input from the input device is provided. Input means for inputting a parameter, and image data input by the input device in accordance with the parameter of the visual environment input from the input means, visual index data corresponding to color appearance under the visual environment A first conversion unit for converting into a parameter, a reception environment parameter of the reception side, and an output device of the reception side according to the reception environment parameter received by the reception unit. Second conversion means for converting the index data so that the color appearance of the output image matches the color appearance of the image input from the input device; Transmitting apparatus comprising: a transmitting means for transmitting data output from the second conversion means through the transmission medium. 8. A transmission method for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a visual environment for observing the image input from the input device is provided. An input step in which a parameter is input, and image data input by the input device according to a parameter of the visual environment input from the input step, an appearance index data corresponding to a color appearance under the visual environment. A first conversion step of converting into the following; a receiving step of receiving a parameter of a viewing environment of a receiving side; and an output device of the receiving side according to the parameter of the viewing environment of the receiving side received in the receiving step. The index data is converted such that the color appearance of the image to be output matches the color appearance of the image input from the input device. And second conversion step, the transmission method characterized by comprising a transmission step of transmitting the data output from the second conversion step through the transmission medium. 9. A computer program for use in a transmission device for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein the image input from the input device is provided. An input step in which a parameter of a visual environment for observing the image is input, and in accordance with the parameter of the visual environment input from the input step, image data input by the input device is converted into a color appearance under the visual environment. A first conversion step of converting into a corresponding appearance index data, a receiving step of receiving a parameter of a viewing environment on a receiving side, and a parameter of the viewing environment of the receiving side received by the receiving step, The color appearance of the image output from the output device on the receiving side matches the color appearance of the image input from the input device. Providing a computer program comprising: a second conversion step of converting the index data as described above; and a transmission step of transmitting data output from the second conversion step via the transmission medium. Medium. 10. A transmitting apparatus for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a transmission environment for observing the image input from the input device is provided. A transmission apparatus comprising: input means for inputting parameters; and transmission means for transmitting the image input from the input device and the parameters of the visual environment input from the input means. 11. A transmission method for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein a visual environment for observing the image input from the input device is provided. A transmission method, comprising: an input step of inputting a parameter; and a transmission step of transmitting the image input from the input device and the parameter of the visual environment input from the input step. 12. A computer program for use in a transmission device for performing a predetermined conversion on an image input from an input device and transmitting the image via a transmission medium, wherein the image input from the input device is provided. A computer program comprising: an input step in which a parameter of a visual environment for observing the image is input; and a transmitting step of transmitting the image input from the input device and the parameter of the visual environment input from the input step. A providing medium characterized by being provided. 13. An input from an input device on a transmission side,
A receiving device that receives image data that has been transmitted in accordance with the parameters of the viewing environment of the transmitting side and that displays and outputs the image data to an output device, wherein the image data transmitted from the transmitting side is Receiving means for receiving, input means for inputting a parameter of a visual environment for observing an image displayed and output on the output device, and the output device according to the parameter of the visual environment input from the input means. Converting means for converting the image data received by the receiving means so that the color appearance of the image displayed and output matches the color appearance of the image input from the input device on the transmission side; and Output means for outputting the image data converted by the means to the output device. 14. The output device according to claim 13, wherein the output device emits the soft copy image by emitting light.
3. The receiving device according to claim 1. 15. The receiving apparatus according to claim 14, wherein the conversion unit performs a correction process on a contrast of the soft copy image due to an influence of ambient light, which is one of elements of the visual environment. 16. The receiving apparatus according to claim 13, wherein said conversion means performs a correction process for chromatic adaptation of a human in accordance with the luminance of ambient light which is one of the elements of the visual environment. 17. An input from a transmitting-side input device,
A receiving method for receiving image data that has been transmitted in accordance with a parameter of the viewing environment of the transmitting side and displaying and outputting the image data to an output device, wherein the image data transmitted from the transmitting side is A receiving step of receiving, an input step of inputting a parameter of a visual environment for observing an image displayed and output on the output device, and the output device according to the parameter of the visual environment input from the input step. A conversion step of converting the image data received by the receiving step so that the color appearance of the image output and displayed matches the color appearance of the image input from the input device on the transmission side; Outputting the image data converted by the step to the output device. . 18. An input from a transmission-side input device,
A computer program used for a receiving apparatus that receives image data that has been transmitted in accordance with a parameter of the viewing environment of the transmitting side and that displays and outputs the image data to an output device, wherein the computer program is transmitted from the transmitting side. A receiving step of receiving the image data, an input step of inputting a parameter of a visual environment for observing an image displayed and output on the output device, and, according to the parameter of the visual environment input from the input step, A conversion step of converting the image data received by the receiving step so that the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device on the transmission side. And outputting the image data converted by the conversion step to the output device. A providing medium characterized by providing a computer program comprising the same. 19. An input from a transmission-side input device,
A receiving apparatus that receives image data that has been transmitted in accordance with the parameters of the viewing environment on the transmitting side and the parameters of the viewing environment on the receiving side, and displays and outputs the output data to an output device. Input means for inputting a parameter of a visual environment for observing an image displayed and output on a device; transmitting means for transmitting a parameter of a visual environment input from the input means to the transmitting side; transmitted from the transmitting side. A receiving unit for receiving the image data, and an output unit for outputting the image data received by the receiving unit to the output device. 20. An input from a transmission-side input device,
A receiving method for receiving image data that has been converted and transmitted according to the parameters of the viewing environment of the transmitting side and the parameters of the viewing environment of the receiving side, and displaying and outputting the output data to an output device. An input step in which a parameter of a visual environment for observing an image displayed and output on the device is input, a transmitting step of transmitting the parameter of the visual environment input from the input step to the transmitting side, and transmitted from the transmitting side. A receiving step of receiving the received image data; and an output step of outputting the image data received in the receiving step to the output device. 21. An input from a transmission-side input device,
A computer program for use in a receiving apparatus that receives image data converted and transmitted according to the parameters of the viewing environment on the transmission side and the parameters of the viewing environment on the receiving side, and displays and outputs the output data to an output device. An input step of inputting a parameter of a visual environment for observing an image displayed and output on the output device; a transmitting step of transmitting a parameter of a visual environment input from the input step to the transmitting side; A computer program comprising: a receiving step of receiving the image data transmitted from the side; and an output step of outputting the image data received by the receiving step to the output device. Medium. 22. Image data transmitted from a transmission side and input from an input device on the transmission side, and a parameter of a visual environment for observing an image input from the input device are received. A receiving device for displaying and outputting the image data transmitted from the transmitting side and a parameter of a visual environment of the transmitting side; and a receiving device for receiving the visual environment received by the receiving unit. A first conversion unit configured to convert the image data into appearance index data corresponding to a color appearance under the visual environment in accordance with a parameter; and a visual environment for observing an image displayed and output on the output device. Input means for inputting a parameter; and a color appearance of an image output by the output device according to a parameter of the visual environment input from the input means. Second converting the index data to match the color appearance of the image input from the input device of the transmitting side
And an output unit for outputting the image data obtained by the second conversion unit to the output device. 23. Receiving image data input from an input device on the transmission side and parameters of a visual environment for observing an image input from the input device, transmitted from a transmission side, and transmitting the data to an output device. A receiving method of displaying and outputting the image data transmitted from the transmitting side and a parameter of a visual environment of the transmitting side; and a receiving method of the visual environment received by the receiving step. A first step of converting the image data into appearance index data corresponding to a color appearance under the visual environment in accordance with a parameter;
A conversion step; an input step in which a parameter of a visual environment for observing an image displayed and output on the output device is input; and the output device outputs in accordance with the parameter of the visual environment input from the input step. A second conversion step of converting the index data so that the color appearance of the image to be converted matches the color appearance of the image input from the input device on the transmission side, and the second conversion step. And outputting the image data to the output device. 24. Receiving image data input from an input device on the transmission side and parameters of a visual environment for observing an image input from the input device, transmitted from a transmission side, and outputting the data to an output device. A computer program used for a receiving device that displays and outputs the received image data, wherein the receiving step includes receiving the image data transmitted from the transmitting side and a parameter of a viewing environment of the transmitting side, A first method of converting the image data into appearance index data corresponding to a color appearance under the visual environment according to a parameter of the visual environment;
A conversion step; an input step in which a parameter of a visual environment for observing an image displayed and output on the output device is input; and the output device outputs in accordance with the parameter of the visual environment input from the input step. A second conversion step of converting the index data so that the color appearance of the image to be converted matches the color appearance of the image input from the input device on the transmission side, and the second conversion step. Providing an output device for outputting the output image data to the output device. 25. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. In the image processing system for performing a predetermined conversion on the image and displaying and outputting the image to an output device, the transmitting side is configured to input a parameter of a viewing environment for observing the image input from the input device. First input means, and image data input by the input device in accordance with the parameters of the visual environment input from the first input means, the visual index data corresponding to the color appearance under the visual environment And a transmitting unit that transmits the appearance index data output from the first converting unit via the transmission medium, wherein the receiving side includes: Receiving means for receiving the index data transmitted via a transmission medium; second input means for inputting a parameter of a visual environment for observing an image displayed and output to the output device; The color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device on the transmission side in accordance with the parameters of the visual environment input from the input means. A second conversion unit that converts the index data received by the reception unit; and an output unit that outputs the image data converted by the second conversion unit to the output device. Characteristic image processing system. 26. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. In the image processing method of performing a predetermined conversion on the image and displaying the image on an output device, the transmitting side includes: a first input step in which a parameter of a visual environment for observing the image is input; A first conversion for converting image data input by the input device into appearance index data corresponding to a color appearance under the visual environment in accordance with the visual environment parameters input from a first input step; And transmitting the visual index data output from the first conversion step via the transmission medium, wherein the receiving side transmits the visual index data via the transmission medium. A receiving step of receiving the sent index data, a second input step of inputting a parameter of a visual environment for observing an image displayed and output to the output device, and a second input step. According to the parameters of the input visual environment, the color appearance of the image displayed and output to the output device matches the color appearance of the image input from the input device on the transmission side, the reception Image processing, comprising: a second conversion step of converting the index data received by the step; and an output step of outputting the image data converted by the second conversion step to the output device. Method. 27. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. A computer program used in an image processing system that performs a predetermined conversion on the image and then outputs and displays the image on an output device, wherein the transmission-side program receives a parameter of a viewing environment for observing the image. A first input step, and changing the image data input by the input device according to a parameter of the visual environment input from the first input step to an appearance index corresponding to a color appearance under the visual environment. A first conversion step of converting the data into data, and a transmission step of transmitting, via the transmission medium, the appearance index data output from the first conversion step. The reception-side program comprises: a reception step of receiving the index data transmitted via the transmission medium; and a parameter of a visual environment for observing an image displayed and output on the output device. A second input step, and according to the parameters of the visual environment input from the second input step, a color appearance of an image displayed and output on the output device is output from the input device on the transmission side. A second conversion step of converting the index data received by the receiving step so as to match the color appearance of the input image; and outputting the image data converted by the second conversion step to the output device. Providing a computer program having an output step of outputting to a computer. 28. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. In the image processing system for displaying and outputting the image to an output device, the transmitting side is configured to: a first input unit configured to input a parameter of a visual environment for observing an image input from the input device; First conversion means for converting image data input by the input device into appearance index data corresponding to color appearance under the visual environment, in accordance with the parameters of the visual environment input by the means; First receiving means for receiving a parameter of a viewing environment on a receiving side for observing an image displayed and output to an output device; and the viewing environment received by the first receiving means. According to the parameter, the index data output from the first conversion unit is changed so that the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device. A second conversion unit for converting, and a first transmission unit for transmitting the data obtained by the second conversion unit via the transmission medium, wherein the reception side transmits the data via the transmission medium. Second receiving means for receiving the received data, output means for outputting the data received by the second receiving means to the output device, and display output to the output device Second input means for inputting a parameter of a visual environment for observing an image, and second transmitting means for transmitting a parameter of the visual environment input from the second input means to the transmitting side; An image processing system, characterized in that it comprises. 29. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. In the image processing method for displaying and outputting the image on an output device, the transmitting side includes: a first input step in which a parameter of a visual environment for observing an image input from the input device is input; A first conversion step of converting image data input by the input device into appearance index data corresponding to a color appearance under the visual environment, according to the parameters of the visual environment input from step; A first receiving step of receiving a parameter of a viewing environment of a receiving side for observing an image displayed and output to an output device; According to the parameters of the viewing environment, the image output from the first conversion step is output so that the color appearance of the image displayed and output to the output device matches the color appearance of the image input from the input device. A second conversion step of converting the index data, and a first transmission step of transmitting the data output from the second conversion step via the transmission medium, wherein the receiving side includes the transmission medium A second receiving step of receiving the data transmitted through the second step; an output step of outputting the data received by the second receiving step to the output device; A second input step of inputting a parameter of a visual environment for observing an image displayed and output; and a parameter of the visual environment input from the second input step. An image processing method characterized by comprising a second transmission step of transmitting to the transmitting side. 30. A transmission side performs a predetermined conversion on an image input from an input device, transmits the image via a transmission medium, and a reception side transmits the image via the transmission medium. A computer program used for an image processing system that displays and outputs the image on an output device, wherein the program on the transmission side is a first input to which a parameter of a viewing environment for observing an image input from the input device is input. And converting the image data input by the input device into appearance index data corresponding to a color appearance under the visual environment in accordance with the visual environment parameters input from the first input step. A first converting step, and a first receiving step of receiving a parameter of a viewing environment of a receiving side that observes an image displayed and output to the output device. According to the parameters of the visual environment received by the receiving step, the color appearance of the image displayed and output on the output device matches the color appearance of the image input from the input device. A second conversion step of converting the index data output from the first conversion step, and a first transmission step of transmitting the data output from the second conversion step via the transmission medium. The receiving-side program comprises: a second receiving step of receiving the data transmitted via the transmission medium; and transmitting the data received in the second receiving step to the output device. An output step of outputting; and a second input step of inputting a parameter of a visual environment for observing an image displayed and output to the output device. And a second transmission step of transmitting the parameters of the visual environment input from the second input step to the transmission side. 31. A transmission side transmits an image input from an input device via a transmission medium, and a reception side performs a predetermined conversion on the image transmitted through the transmission medium and outputs the image. In an image processing system for displaying and outputting to a device, the transmitting side includes: a first input unit configured to input a parameter of a viewing environment for observing the image input from the input device; and the input unit input from the input device. An image and the first
Transmitting means for transmitting the visual environment parameters input from the input means, wherein the receiving side receives the image data transmitted from the transmitting side and the visual environment parameters of the transmitting side. Receiving means for converting, based on the parameters of the visual environment received by the receiving means, the image data into index data of appearance corresponding to the color appearance under the visual environment of the transmitting side.
Conversion means, a second input means for inputting a parameter of a viewing environment on a receiving side for observing an image displayed and output on the output device, and a parameter for the visual environment input from the second input means. A second conversion unit that converts the index data so that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side, Output means for outputting the image data obtained by the second conversion means to the output device. 32. A transmission side transmits an image input from an input device via a transmission medium, and a reception side applies a predetermined conversion to the image transmitted through the transmission medium and outputs the image. In the image processing method of displaying and outputting to a device, the transmitting side includes: a first input step in which a parameter of a visual environment for observing the image input from the input device is input; and the input side input from the input device. An image and the first
A transmitting step of transmitting the parameters of the visual environment input from the inputting step, wherein the receiving side receives the image data transmitted from the transmitting side and the parameters of the visual environment of the transmitting side. A first conversion for converting the image data into appearance index data corresponding to a color appearance under a transmission-side visual environment in accordance with the visual environment parameters received in the receiving step. Step, a second input step in which a parameter of a visual environment for observing an image displayed and output on the output device is input, and according to the parameter of the visual environment input from the second input step, The index data is set so that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side. A second conversion step of converting the image processing method characterized by comprising an output step of an image data obtained by the second conversion step for outputting to said output device. 33. A transmission side transmits an image input from an input device via a transmission medium, and a reception side applies a predetermined conversion to the image transmitted through the transmission medium and outputs the image. A computer program used for an image processing system that displays and outputs to a device, wherein the transmission-side program includes: a first input step in which a parameter of a viewing environment for observing the image input from the input device is input; The image input from the input device;
A transmitting step of transmitting the parameters of the visual environment input from the input step of, the program of the receiving side, the image data transmitted from the transmitting side and the parameters of the visual environment of the transmitting side, A first step of converting the image data into appearance index data corresponding to a color appearance under a viewing environment of a transmission side according to a parameter of the viewing environment received in the receiving step. And a second input step in which a parameter of a visual environment for observing an image displayed and output on the output device is input. According to the parameter of the visual environment input from the second input step, So that the color appearance of the image output from the output device matches the color appearance of the image input from the input device on the transmission side. A computer program comprising: a second conversion step of converting the index data; and an output step of outputting the image data obtained by the second conversion step to the output device. Medium. 34. A first capturing means for capturing a profile for converting DDC image data into DIC image data or DIC image data into DDC image data, and a second capturing means for capturing visual environment parameters. An image data processing apparatus, comprising: a retrieving unit for rewriting a profile captured by the first capturing unit in accordance with the visual environment parameter captured by the second capturing unit. 35. The image data processing according to claim 34, wherein the second capturing unit captures the visual environment parameter input from an input screen or a sensor for inputting the visual environment parameter. apparatus. 36. The image data processing device according to claim 34, wherein the profile is a profile in an ICC profile format. 37. A first capturing step of capturing a profile for converting DDC image data to DIC image data or DIC image data to DDC image data, and a second capturing step of capturing visual environment parameters. And a rewriting step of rewriting a profile captured in the first capturing step in accordance with the visual environment parameter captured in the second capturing step. 38. A first capturing step of capturing a profile for converting DDC image data to DIC image data or DIC image data to DDC image data, and a second capturing step of capturing visual environment parameters. And a rewriting step of rewriting a profile captured in the first capturing step in accordance with the visual environment parameter captured in the second capturing step. Providing medium.