JP2010109752A - Color processing apparatus and method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To match impressions of colors of an image in a plurality of environments where various illuminations or various devices are combined. <P>SOLUTION: In the color processing apparatus, a partial matching point in observing a source-side image and a partial matching point in observing a destination-side image from a device profile of a source-side device and a device profile of a destination-side device are calculated (S702). On the basis of the partial matching points, a color appearance model profile of the source-side device and a color appearance model profile of the destination-side device are generated (S703). The device profile and the color appearance model profile of the source-side device are added to image data (S707) and the image data, to which the device profile and the color appearance have been added, are supplied to another color processing apparatus (S709). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to color processing between different image viewing environments.

  In recent years, desktop publishing (DTP) and computer graphics (CG) technologies have been developed, and color management technology for managing the colors of images displayed on monitors and printed images has become important.

  For example, in CG, there are cases where a CG creation / editing operation is performed while observing a color image displayed on a monitor, and then a manuscript to be submitted is confirmed using a color printer. Here, it is desired that there is a perceptual match between the color image displayed on the monitor and the image printed by the color printer. Color management technology is indispensable for realizing such a demand.

  As a color management technique, a color management system (CMS) using an ICC color profile defined by the International Color Consortium (ICC) is generally used. This CMS defines a device independent color space (PCS) for color matching. Then, on the PCS, color management is realized using a source profile that defines color conversion from the device color space to the PCS and a destination profile that defines color conversion from the PCS to the device color space. PCS is sometimes called a “hub color space”.

  Color conversion is performed as follows based on two types of color profiles, a source profile and a destination profile. First, a color signal value in a device color space suitable for a device that supplies an input image (hereinafter referred to as an input device) is converted into a PCS color signal value by a source profile. Then, the PCS color signal value is converted into a color signal in a device color space suitable for an image output destination device (hereinafter, output device) by the destination profile.

  According to such CMS, color management of monitors and printers used in CG, proof color management in DTP, etc. can be widely and flexibly supported. For example, in CG, a color profile that describes the characteristics of a monitor is specified as a source profile, and a color profile that describes the characteristics of a printer is specified as a destination profile. By specifying the color profile in this way, it is possible to achieve perceptual matching between the desired image and the output image of the printer.

  Furthermore, the ICC color profile is a format that also supports the CIECAM02 and CIECAM97s chromatic adaptation models specified by the International Commission on Illumination (CIE). Can be built. In particular, in color matching between a monitor and a printer, this mechanism can be applied to set a white point in consideration of partial adaptation to obtain more perceptually consistent color reproduction (see Patent Document 1).

  According to color matching considering partial adaptation, color matching between different devices under one illumination is possible. However, the color appearance of an image color-matched between different devices under a certain illumination is different from the color appearance of an image color-matched between different devices under a different illumination.

  One reason for this is that the color reproduction characteristics of the display device differ due to differences in device characteristics or changes in the appearance of object colors in response to changes in illumination. Another reason is that the state of visual adaptation may change according to changes in illumination or color reproduction characteristics.

  As described above, when an image color-matched between different devices under a certain illumination is evaluated in combination with a plurality of illuminations and devices, the color impression is different between the combinations. Therefore, for example, when CG editing / confirmation work is performed across a plurality of environments, there is a problem that the color impression varies depending on the environment.

JP 2000-148979

  An object of the present invention is to match the color impression of an image in a plurality of environments in which various lights and various devices are combined.

  The present invention has the following configuration as one means for achieving the above object.

  In the color processing according to the present invention, the partial adaptation point when observing the source-side image and the destination-side image from the device profile of the source-side device and the device profile of the destination-side device are used. A partial adaptation point is calculated, and based on the partial adaptation point, a color appearance model profile of the source device and a color appearance model profile of the destination device are generated, and the device profile of the source device The color appearance model profile is added to image data, and the image data with the device profile and the color appearance added is supplied to another color processing apparatus.

  In addition, image data is input, a device profile and a color appearance model profile added to the image data are extracted, a partial adaptation point for observing the monitor image from the monitor device profile and the printer device profile, and the A partial adaptation point for observing the image of the printer is calculated, and based on the partial adaptation point, a color appearance model profile of the monitor and a color appearance model profile of the printer are generated, and the extracted device profile and color appearance model Set the profile to the source side profile, set the device profile and color appearance model profile of the monitor to the destination side profile, and add color to the image data. Generating image data subjected to color conversion based on the appearance model, setting the extracted device profile and color appearance model profile as the source side profile, and setting the device profile and color appearance model profile of the printer to the destination side And generating image data obtained by performing color conversion on the image data based on the color appearance model.

  ADVANTAGE OF THE INVENTION According to this invention, the impression of the color of an image can be matched in the some environment where various illumination and various devices were combined.

  Hereinafter, color processing according to an embodiment of the present invention will be described in detail with reference to the drawings.

[System configuration]
FIG. 1 is a block diagram illustrating a configuration example of a color matching system according to an embodiment.

  A network 1101 connects image processing apparatuses (color processing apparatuses) 1102 to 1104 and a server 1105 to each other. The server 1105 functions as a network management server and file server. In other words, the server 1105 manages information when each image processing apparatus connects to the network 1101 by the dynamic host configuration protocol (DHCP), and stores and manages data files shared between the image processing apparatuses 1102 to 1104. Do. Under the management of the server 1105, the image processing apparatuses 1102 to 1104 exchange data files via the network 1101, and display and print images, respectively.

[Device configuration]
FIG. 2 is a block diagram illustrating a configuration example of each of the image processing apparatuses 1102 to 1104.

  The CPU 101 executes an operating system (OS) and various programs stored in the ROM of the main memory 102 and the hard disk drive (HDD) 105 using the RAM of the main memory 102 as a work memory. Each component is controlled via a system bus 114 such as a PCI (peripheral component interconnect) bus. Further, various programs including an image processing application, a printer driver, and a color management module described later are executed.

  The CPU 101 accesses the HDD 105 via the system bus 114 and the serial ATA interface (SATA I / F) 103. In addition, a network 1101 such as a local area network (LAN) is accessed via the network I / F 104.

  In the following description, it is assumed that image processing applications, image data, device profiles of various devices, and the like are read from the HDD 105, but they can also be read from the server 1105 on the network 1101.

  Further, the CPU 101 displays a user interface and processing result of processing to be described later on the monitor 107 via the graphic accelerator 106, and inputs user instructions via the keyboard 111 and mouse 112 connected to the keyboard / mouse controller 110. .

  Further, the CPU 101 outputs the image data to the printer 109 via a USB (Universal Serial Bus) controller 108, and prints an image instructed by the user, for example.

[Image processing application]
The user operates the keyboard 111 and the mouse 112 to instruct execution of the image processing application (image processing AP). In response to this instruction, the CPU 101 executes the image processing AP stored in the HDD 105. The image processing AP (CPU 101) instructs the graphic accelerator 106 to draw a dialog, and the dialog 301 is displayed on the monitor 107.

  FIG. 3 is a diagram showing an example of a dialog 301 provided by the image processing AP.

  The user presses a “host mode” selection button 302 or a “client mode” selection button 303 in the dialog 301.

Host Mode When the user presses the “Host Mode” selection button 302 in the dialog 301, the image processing AP displays an application window 401 for the host mode on the monitor 107.

  FIG. 4 is a view showing an example of an application window 401 for the host mode.

  The user operates the pull-down menu 402 of the application window 401 to instruct image file setting. In response to this instruction (including designation of image data stored in the HDD 105), the image processing AP loads the image data stored in the HDD 105 into the RAM of the main memory 102. Then, the image processing AP instructs the graphic accelerator 106 to draw the image data, and the image represented by the image data is displayed in the image window 403 of the application window 401.

  When the user operates the pull-down menu 402 of the application window 401 to instruct profile setting, the image processing AP displays a profile setting dialog 501 on the monitor 107.

  FIG. 5 is a diagram showing an example of a profile setting dialog 501 provided by the image processing AP.

  The user operates a profile setting dialog 501 to set a device profile necessary for color conversion. The user designates a device profile in which the color reproduction characteristics of the monitor 107 are described by the pull-down menu 502, and designates a device profile in which the color reproduction characteristics of the printer 109 are described by the pull-down menu 503. When the device profile setting is completed, the user presses a setting end button 504. When the setting end button 504 is pressed, the image processing AP sets the designated device profile for color conversion processing described later.

  Although details will be described later, the device profile specified by the profile setting dialog 501 is appropriately created based on the illumination of the environment in which the image processing apparatuses 1102 to 1104 are installed.

  When the user operates the pull-down menu 402 of the application window 401 to instruct image conversion printing, the image processing AP performs color conversion processing described later on the image data held in the RAM of the main memory 102. Then, the printer 109 prints an image based on the image data after the color conversion process.

  After executing the image conversion printing, the image processing AP generates image data for sharing by adding the device profile of the monitor and the color appearance model profile to the image data stored in the RAM of the main memory 102, and temporarily stores it in the HDD 105 or the like. Store. Thereafter, when the user operates the pull-down menu 402 of the application window 401 to instruct image transmission, the image processing AP transmits image data for sharing to the server 1105 via the network I101. Details of the color appearance model profile (CAM profile) will be described later.

  The user instructs the image transmission when the user wants to share the color appearance of the image with another user (image processing apparatus). When it is desired to share with a specific user (image processing apparatus), the image data for sharing may be directly transmitted to the image processing apparatus without going through the server 1105. That is, the image processing AP and the server 1105 function as a supply unit that supplies a processing target image to another image processing apparatus.

Client Mode When the user presses the “Client Mode” selection button 303 in the dialog 301, the image processing AP displays an application window 601 for client mode on the monitor 107.

  FIG. 6 shows an example of an application window 601 for the client mode.

  The user operates the pull-down menu 602 of the application window 601 to instruct acquisition of an image file. In response to this instruction (including designation of image data stored in the server 1105), the image processing AP loads the image data stored in the server 1105 into the RAM of the main memory 102. Then, the image processing AP instructs the graphic accelerator 106 to draw the image data, and the image represented by the image data is displayed in the image window 603 of the application window 601.

  Note that “image conversion” in the pull-down menu 602 cannot be initially selected, but can be selected by acquiring an image file.

  When the user operates the pull-down menu 602 of the application window 601 to instruct profile setting, the image processing AP displays a profile setting dialog 501 shown in FIG. Therefore, the user can set the device profiles of the monitor 107 and the printer 109 as in the host mode.

  When the user operates the pull-down menu 602 of the application window 601 to instruct image conversion, the image processing AP performs color conversion processing described later on the image data held in the RAM of the main memory 102. Then, an image based on the image data after the color conversion process is displayed on the image window 603 and printed by the printer 109.

[Color matching processing in host mode]
FIG. 7 is a flowchart for explaining the color matching processing in the host mode. This processing is executed by the image processing AP when image conversion printing is instructed.

  The image processing AP acquires the monitor device profile designated by the dialog 501 as the source device profile and the printer device profile as the destination device profile (S701). The device profile data structure will be described later.

  Next, the image processing AP calculates a partial adaptation point based on the acquired device profile (S702).

First, the image processing AP acquires the monitor device white point Wm (Xm, Ym, Zm) from the monitor device profile, and the printer device white point Wp (Xp, Yp, Zp) from the printer device profile. Based on these white point values, chromaticity coordinates in the xy coordinate system are obtained. Here, it is assumed that the xy coordinate of the device white point of the monitor is w _m (x _m , y _m ), and the xy coordinate of the device white point of the printer is w _p (x _p , y _p ). Subsequently, the chromaticity coordinates of the partial adaptation points in the xy coordinates are calculated for each of the monitor observation and the print observation by the following expression.
x _am = (2x _m + x _p ) / 3
y _am = (2y _m + y _p ) / 3
x _ap = (x _m + 2x _p ) / 3… (1)
y _ap = (y _m + 2y _p ) / 3
Where w _am (x _am , y _am ) is the chromaticity coordinate of the partial adaptation point during monitor observation,
w _ap (x _ap , y _ap ) is the chromaticity coordinate of the partial adaptation point during print observation.

FIG. 9 is a diagram showing the relationship between the chromaticity coordinates w _m and w _p of the device white point and the chromaticity coordinates w _am and w _ap of the partial adaptation point.

Subsequently, the image processing AP calculates the XYZ coordinates of the partial adaptation point from the calculated chromaticity coordinates according to the following equation.
X _am = Ym × x _am / y _am
Y _am = Ym
Z _am = Ym × (1-x _am -y _am ) / y _am
X _ap = Yp × x _ap / y _ap … (2)
Y _ap = Yp
Z _ap = Yp × (1-x _ap -y _ap ) / y _ap
Where W _am (X _am , Y _am , Z _am ) is a partial adaptation point during monitor observation,
W _ap (X _ap , Y _ap , Z _ap ) is a partial adaptation point during print observation.

Next, the image processing AP generates a source CAM profile for monitoring and a destination CAM profile for printer based on the calculated partial adaptation points W _am and W _ap (S703). The data structure of the CAM profile will be described later.

  Next, the image processing AP loads image data to be processed into the RAM of the main memory 102 from the directory of the HDD 105 or server 1105 designated by the user (S704). Then, color matching processing, which will be described later, is performed on the image data using the source-side and destination-side device profiles and the CAM profile, and an image based on the processed image data is printed on the printer 109 (S705).

  Next, the image processing AP causes the monitor 107 to display an image based on the image data that has not been subjected to the color matching process and is stored in the RAM of the main memory 102 (S706). Then, shared image data is stored by adding the source-side device profile (monitor device profile) and the source-side CAM profile to the image data not subjected to the color matching processing held in the RAM of the main memory 102 (S707). ). The data structure of the image data for sharing will be described later.

  The monitor image and the print image obtained in this way are images with the same color appearance by color matching processing.

  Next, the image processing AP determines whether or not the user has instructed image transmission by operating the pull-down menu 402 of the application window 401 (S708), and when image transmission is instructed, the image data for sharing is stored in the server. It transmits to 1105 (S709).

Device Profile FIG. 8 is a diagram showing an example data structure of a device profile.

  The device profile includes a 4-byte tag ID, an enumeration of 12-byte information values following the tag ID, and colorimetric value data. Although FIG. 8 shows the offset address in the file, the profile describes tag ID, information value, and colorimetric value data. In FIG. 8, tag IDs are expressed by keywords, but the actual description is a 4-byte numerical value corresponding to each keyword.

  The tag “Profiler Version” is a character string indicating the type and version of the profile, and is always placed at the top of the profile.

  The tag “Device Type” indicates the type of device, information value “0” is printer, “1” is monitor, “2” is projector, “3” is DSC (digital still camera), “4” is scanner. Show. A tag “Model Name” is a character string representing a model name.

  A tag “Device Modeling” indicates a representation model of device characteristics. The information value “0” indicates that the subsequent colorimetric value data is based on a three-dimensional lookup table (3DLUT), “1” indicates a gamma matrix model, and “2” indicates a three-dimensional polynomial model. The arrangement of 3DLUT data is described, for example, in the ICC Profile specification issued by ICC. A three-dimensional polynomial model is described in, for example, US Patent Publication No. 2007/0058223.

The tag “Number of Data” indicates the total number of XYZ values described in the colorimetric value data. In the example of FIG. 8, since the colorimetric value data is based on 3DLUT, a hexadecimal number 2D9 indicating the number of grid points 9 ³ = 729 is described.

  The tag “Data Head” indicates the description start address of the colorimetric value data. In the colorimetric value data, each XYZ value is described in single precision floating point in the order of X, Y, and Z.

CAM profile FIG. 10 is a diagram showing an example of the data structure of a CAM profile.

  The CAM profile is composed of a 4-byte tag ID and a list of 12-byte information values following the tag ID. FIG. 10 shows the offset address in the file, but the profile describes the tag ID and information value. In FIG. 10, the tag ID is expressed by a keyword, but the actual description is a 4-byte numerical value corresponding to each keyword.

  The tag “Profiler Version” is a character string indicating the type and version of the profile, and is always placed at the top of the profile.

  The tag “Adopted White” indicates an adaptation white point, and the adaptation white point is described in the order of X, Y, and Z in single precision floating point. That is, the adaptive white point calculated in step S702 is described as the information value of the tag “Adopted White”.

  The tag “Degree of Adaptation” indicates the rate of incomplete adaptation, and the rate of incomplete adaptation is described in single precision floating point. The information value “−1” indicates that the ratio of incomplete adaptation is automatically calculated.

  The tag “Luminance of Adapting Visual Field” indicates the luminance value of the adaptive visual field, and the luminance value of the adaptive visual field is described in single precision floating point. In general, the luminance value of the adaptive visual field describes a value that is 20% of the average luminance value of the double visual field.

  The tag “Background” indicates the background luminance, and the background luminance describes a relative value with respect to white in a single precision floating point. In general, the background luminance is described as 20 as a percentage of the average luminance of the ten-degree field of view.

  The tag ID and the information value are described in detail in the CIECAM02 specification defined by CIE.

[Image Data for Sharing] FIG. 11 shows an example of the data structure of image data for sharing.

  The image data for sharing includes a 4-byte tag ID, an enumeration of 12-byte information values following the tag ID, image data, and profile data. Although FIG. 11 shows the offset address in the file, the tag ID, information value, image data, and profile data are described in the image data. In FIG. 11, the tag ID is expressed by a keyword, but the actual description is a 4-byte numerical value corresponding to each keyword.

  The tag “Compression” represents the compression format of the image data. The information value “0” indicates uncompressed, “1” indicates JPEG compression, and “2” indicates run-length compression.

  The tag “Image Width” indicates the horizontal width of the image, and the tag “Image Height” indicates the vertical length of the image.

  The tag “Image Data Head” indicates the description start address of the image data. In the example of FIG. 11, the image data is described in an uncompressed manner based on the value of the tag “Compression” based on “0”.

  A tag “Profile Data Head” indicates a description start address of profile data. Profile data is described in a structure in which a device profile is followed by a CAM profile. The device profile and the CM profile can be separated by detecting a tag “Profile Version” or the like.

[Color matching process in client mode]
FIG. 12 is a flowchart for explaining the color matching process in the client mode. This process is executed by the image processing AP when an image conversion is instructed.

  The image processing AP loads image data to be processed from the directory of the server 1105 designated by the user into the RAM of the main memory 102 (S1201). Note that the image data to be processed is image data for sharing generated by another image processing apparatus in image conversion printing in the host mode.

  Next, the image processing AP extracts and separates the device profile and the CAM profile from the image data held in the RAM of the main memory 102 (S1202). That is, the profile data is extracted from the head address indicated by the information value of the tag “Profile Data Head” of the image data, and then the tag “Profiler Version” is detected to separate the device profile from the CAM profile. These profiles are used as source-side profiles in the processing described later.

  Next, the image processing AP acquires the device profile of the monitor and the device profile of the printer designated by the dialog 501 (S1203). These device profiles are used as destination-side profiles in the processing described later.

  Next, the image processing AP calculates partial adaptation points at the time of monitor observation and print observation based on the device profile acquired at step S1203 in the same manner as the host mode processing (S702) (S1204). Then, as in the host mode processing (S703), a monitor CAM profile and a printer CAM profile are generated based on the calculated partial adaptation points (S1205).

  Next, the image processing AP sets the device profile and CAM profile extracted from the image data as the source profile. Further, the monitor device profile acquired in step S1203 and the monitor CAM profile generated in step S1204 are set as the destination profile (S1206). Then, color matching processing described later is performed on the image data held in the RAM of the main memory 102, and an image based on the processed image data is displayed on the monitor 107 (S1207). In other words, display image data is generated.

  Next, the image processing AP sets the device profile and CAM profile extracted from the image data as the source profile. Further, the printer device profile acquired in step S1203 and the printer CAM profile generated in step S1204 are set as the destination side profile (S1208). Then, color matching processing, which will be described later, is performed on the image data held in the RAM of the main memory 102, and an image based on the processed image data is printed on the printer 109 (S1209). In other words, image data for printing is generated.

  The monitor image and the print image obtained in this manner are images with the same color appearance by color matching processing in which the color reproduction characteristics of devices in other environments are set to the color reproduction characteristics on the source side. The impression matches the color impression in other environments.

[Color matching processing]
FIG. 13 is a flowchart for explaining color matching processing (S705, S1206, S1208).

  The image processing AP acquires pixel values (RGB values) in raster order from the image data stored in the RAM of the main memory 102 (S1301), and converts the acquired pixel values into XYZ values based on the device profile on the source side (S1302). ).

  Next, the image processing AP forward-converts the XYZ values into JCh values based on a color appearance model (for example, CIECAM02) (S1303). The adaptive white point given to the color appearance model is a value of the adaptive white point described in the source-side CAM profile.

  Next, the image processing AP performs color gamut mapping of the pixel value converted into the JCh space based on the device profile on the destination side (S1304).

  Next, based on the color appearance model, the image processing AP reversely converts the JCh values mapped in the color gamut into XYZ values (S1305). The adaptive white point given to the color appearance model is the value of the adaptive white point described in the destination CAM profile.

  Next, the image processing AP converts the XYZ values into device values (for example, RGB values) based on the device model on the destination side, and stores them in a predetermined area of the RAM of the main memory 102 (S1306). Steps S1301 to S1306 are repeated until the color conversion is performed on all the pixels of the image data based on the determination in step S1307.

  FIG. 14 is a flowchart for explaining the color gamut mapping (S1304).

  The image processing AP acquires the Jch value (S1401), and determines whether the acquired Jch value is within or outside the color gamut of the destination device (internal / external determination) (S1402). If it is out of the color gamut, the Jch value on the surface of the color gamut of the destination device having the smallest distance of the same hue as the acquired Jch value is calculated (S1403). In other words, the acquired Jch value is mapped onto the color gamut surface. Note that the mapping (S1403) is not performed in the color gamut. The acquired or calculated JCh value is output as a color gamut mapping result (S1404).

[Calculation method of colorimetric values described in profile]
The color profile describes colorimetric values of color patches determined by a device characteristic expression model. The color measurement value of the color patch is calculated as follows.

First, a device profile for a display device based on an object color such as a printer is as follows. The XYZ value for the spectral reflectance Ri (λ), which is the i-th profile value, is the measured value S (λ) of the spectral distribution of illumination, and the twice field XYZ color matching function x (λ) y (λ) z λ) is calculated by the following equation.
Xi = ∫S (λ) Ri (λ) x (λ) dλ
Yi = ∫S (λ) Ri (λ) y (λ) dλ (3)
Zi = ∫S (λ) Ri (λ) z (λ) dλ
The integration range is a visible light range.

A device profile for a display device such as a monitor based on the light source color is as follows. The XYZ value for the spectral radiance Ri (λ), which is the i-th profile value, is calculated by the following equation using the twice-field XYZ color matching function x (λ) y (λ) z (λ).
Xi = ∫Ri (λ) x (λ) dλ
Yi = ∫Ri (λ) y (λ) dλ (4)
Zi = ∫Ri (λ) z (λ) dλ
The integration range is a visible light range.

  Thus, the color reproduction characteristic of one device in the first environment under the first illumination is set to the color reproduction characteristic of the source-side device for color matching in the second environment under the second illumination, Color matching is performed in the second environment. As a result, the color impression of the image color-matched between different devices in the first environment can be matched with the color impression of the same image color-matched between different devices in the second environment.

  Therefore, it is possible to match color impressions in multiple environments where various lighting and various devices are combined, for example, depending on the environment when editing / checking CG across multiple environments. Can solve problems with different impressions.

[Other embodiments]
Note that the present invention can be applied to a system constituted by a plurality of devices (for example, a computer, an interface device, a reader, a printer, etc.), but an apparatus (for example, a copier, a facsimile machine, a control device) composed of a single device. Etc.).

  Another object of the present invention is to supply a recording medium or a recording medium recording a computer program for realizing the functions of the above embodiments to a system or apparatus. This can also be achieved by the computer (CPU or MPU) of the system or apparatus executing the computer program. In this case, the software read from the recording medium itself realizes the functions of the above embodiments, and the computer program and the computer-readable recording medium storing the computer program constitute the present invention. .

  Further, the above functions are not only realized by the execution of the computer program. That is, according to the instruction of the computer program, the operating system (OS) and / or the first, second, third,... This includes the case where the above function is realized.

  The computer program may be written in a memory of a device such as a function expansion card or unit connected to the computer. That is, it includes the case where the CPU of the first, second, third,... Device performs part or all of the actual processing according to the instructions of the computer program, thereby realizing the above functions.

  When the present invention is applied to the recording medium, the recording medium stores a computer program corresponding to or related to the flowchart described above.

A block diagram showing a configuration example of a color matching system of an embodiment, Block diagram showing a configuration example of each image processing device, The figure which shows an example of the dialog which image processing AP provides, Figure showing an example of an application window for host mode The figure which shows an example of the dialog for the profile setting which image processing AP provides, An example of an application window for client mode, A flowchart for explaining color matching processing in the host mode; An example of device profile data structure It is a figure which shows the relationship between the chromaticity coordinate of a device white point, and the chromaticity coordinate of a partial adaptation point. An example of the data structure of a CAM profile The figure which shows the data structure example of the image data for sharing, A flowchart for explaining color matching processing in the client mode; A flowchart for explaining color matching processing; It is a flowchart explaining a color gamut mapping.

Claims (9)

Calculation means for calculating a partial adaptation point when observing the source-side image and a partial adaptation point when observing the destination-side image from the device profile of the source-side device and the device profile of the destination-side device When,
Generating means for generating a color appearance model profile of the source side device and a color appearance model profile of the destination side device based on the partial adaptation points;
Adding means for adding the device profile of the source device and the color appearance model profile to image data;
A color processing apparatus comprising: a supply unit configured to supply image data to which the device profile and the color appearance are added to another color processing apparatus.   2. The color processing apparatus according to claim 1, further comprising color processing means for performing color conversion based on a color appearance model on the image data using the device profile and the color appearance model profile.   3. The color processing apparatus according to claim 2, further comprising control means for displaying an image based on the image data on a monitor and causing a printer to print an image based on the color-converted image data. Input means for inputting image data;
Extraction means for extracting a device profile and a color appearance model profile added to the image data;
A calculation means for calculating a partial adaptation point when observing the image of the monitor and a partial adaptation point when observing the image of the printer from the device profile of the monitor and the device profile of the printer;
Generating means for generating a color appearance model profile of the monitor and a color appearance model profile of the printer based on the partial adaptation points;
The extracted device profile and color appearance model profile are set as a source-side profile, the monitor device profile and color appearance model profile are set as a destination-side profile, and the image data is based on a color appearance model. Display color processing means for generating converted image data;
The extracted device profile and color appearance model profile are set as the source-side profile, the printer device profile and color appearance model profile are set as the destination-side profile, and the color appearance model is added to the image data. And a color processing means for printing that generates color-converted image data based on the above.   Further, a control means for causing an image based on the image data color-converted by the display color processing means to be displayed on a monitor, and causing the printer to print an image based on the image data color-converted by the printing color processing means. 5. The color processing apparatus according to claim 4, further comprising: Calculating a partial adaptation point when observing the source side image and a partial adaptation point when observing the destination side image from the device profile of the source side device and the device profile of the destination side device;
Generating a color appearance model profile of the source device and a color appearance model profile of the destination device based on the partial adaptation points;
Adding the device profile of the source device and the color appearance model profile to image data;
A color processing method comprising: supplying image data to which the device profile and the color appearance are added to another color processing apparatus. Enter the image data,
Extracting the device profile and color appearance model profile added to the image data,
Calculating a partial adaptation point when observing the image of the monitor and a partial adaptation point when observing the image of the printer from the device profile of the monitor and the device profile of the printer,
Generating a color appearance model profile of the monitor and a color appearance model profile of the printer based on the partial adaptation points;
The extracted device profile and color appearance model profile are set as a source-side profile, the monitor device profile and color appearance model profile are set as a destination-side profile, and the image data is based on a color appearance model. Generate converted image data,
The extracted device profile and color appearance model profile are set as the source-side profile, the printer device profile and color appearance model profile are set as the destination-side profile, and the color appearance model is added to the image data. A color processing method comprising: generating image data subjected to color conversion based on the method.   6. A non-transitory computer-readable storage medium storing a program for controlling a computer device to function as each unit of the color processing device according to claim 1.   9. A computer-readable recording medium on which the program according to claim 8 is recorded.

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