JPH08242376A - Color image transmitter, image processor, color image transmission method and image processing method - Google Patents

Abstract

PURPOSE: To transmit a color original subjected to color adjustment only for a specific color and to confirm the range of a color subjected to the color adjustment and a color density parameter by a reception side. CONSTITUTION: An operating part 111 includes a range setting part to set the range of color adjustment and an adjusting part to set the parameter of color adjustment. A gamma table 102 for reference, a gamma table 103 for color adjustment which performs the color adjustment corresponding to the parameter set by the adjusting part, an application range judging part 104 which judges whether or not color image data is the one within the range of color to be subjected to the color adjustment set by the range setting part, and a multiplexer 105 which outputs by switching selectively the gamma table 102 for reference and the gamma table 103 for color adjustment corresponding to a judged result are provided. Color adjustment information is transmitted by storing in comment information from an encoder part 106, and a header character attaching part 108 samples the color adjustment information from received comment information, and adds it to decoded reception color image data as a header character.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image transmission device, an image processing device, a color image transmission method and an image processing method.

[0002]

2. Description of the Related Art FIG. 12 shows a configuration example of a conventional color facsimile apparatus. Here, 101 is an image reading unit that reads a color document and outputs red (R), green (G), and blue (B) image signals, and 106 is an RGB reading unit.
Color signals of JPEG (Joint Photogr
JPEG that performs encoding and decoding by a baseline encoding method.
An encoding unit 107 connects and controls a line,
A line control unit for transmitting / receiving coded data, and a color space conversion unit 109 for converting an RGB image signal received from a line into a color space of cyan (C), magenta (M), and yellow (Y) of printer characteristics. , 110 are color space conversion units 109
It is a color image printing unit that prints out the CMY color image signals output from.

First, the operation during transmission will be described. The operator operates a dial key and a transmission start key (not shown) to start a transmission operation. The color image reading unit 101 reads a color original and the JPEG encoding unit 106 reads JP
Perform EG baseline encoding processing. This encoding includes raster block transform, DCT (discrete cosine transform) processing,
Quantization processing, zigzag scanning, and Huffman coding are performed in this order. Further, the coded data subjected to the JPEG baseline coding is sent to the line through the line control unit 107.

Next, the operation at the time of reception will be described. The code data received from the line is input to the JPEG encoding unit 106 via the line control unit 107. The JPEG encoding unit 106 first performs Huffman decoding, zigzag scan restoration, inverse quantization, IDCT processing, and block raster conversion in this order. In the color space conversion unit 109, RGB
The signal is converted into a CMY signal which is the color space of the printer. Finally, the color image printing unit 110 prints out the received image data and ends the receiving operation.

[0005]

In the above-mentioned conventional example, there is a problem that only the color original document and the standard gamma characteristic can be transmitted. Therefore, it was not possible to adjust the color of only a specific color and send a color original, and it was also impossible for the receiving side to check the color adjustment information about the range of the color adjusted and the color density parameter. It was

However, if only a specific color is color-adjusted, a color original can be transmitted, and the receiving side can confirm the color adjustment information about the range of the color adjusted and the color density parameter. If it is possible, it is considered that, for example, it is possible to easily faithfully reproduce the same color tone and brightness as the original transmission document on the receiving side.

In addition, the color tone is softer than the original document, pastel tone or the primary color is emphasized to be harder.
Alternatively, you can send an image with a color tone that closely matches the intention of the sender, such as emphasizing the blue of the sea and sky.The receiver that receives the color adjustment information requests the sender to change the color adjustment settings appropriately. Therefore, it is considered that the request on the receiving side can be satisfied.

The present invention has been made in view of the above points, and it is an object of the present invention to adjust the color of only a specific color to transmit a color original document, and to perform the color adjustment. A color image transmission apparatus, an image processing apparatus, a color image transmission method, and an image processing method that allow a receiving side to confirm color adjustment information about a color range and a color density parameter.

Another object of the present invention is to enable the receiving side to recognize the color adjustment made on the transmitting side.

Another object of the present invention is to notify the user of color adjustment relating to a received image.

[0011]

In order to achieve the above object, a color image transmission apparatus of the present invention includes a color adjustment range setting means for setting a color range for color adjustment, and a color setting parameter for color adjustment. Adjustment parameter setting means, color image reading means for reading a document image and outputting color image data, a standard gamma table that does not perform color adjustment on the color image data, and the color adjustment parameter for the color image data. A color adjustment gamma table for performing color adjustment according to the parameter set by the setting means, and it is determined whether or not the color image data is within the color range for performing the color adjustment set by the color adjustment range setting means. Applicable range determining means, output from the standard gamma table and the color adjusting gamma table according to the determination result of the applicable range determining means The output from the selection switch to, characterized by comprising a selection means for outputting.

Further, as a form of the color image transmission apparatus of the present invention, the color adjustment range setting means sets a range for performing color adjustment by an upper limit value and a lower limit value for each element of the color space of the color image data. It can be characterized by:

As another form of the color image transmission apparatus of the present invention, the color adjustment range setting means sets a center coordinate for performing color adjustment for each element of the color space of the color image data and a range for performing color adjustment. It is possible to set a range of colors to be color-adjusted by the radius.

In another form of the color image transmission apparatus of the present invention, the color image data for transmitting the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means is used as a header character. It can be characterized in that it comprises a sending side header character adding means for adding.

As another form, the color image transmission device of the present invention is added to the color image data for transmitting the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means. Color adjustment information transmitting means for storing in additional information and transmitting, and receiving side header character adding means for extracting the color adjustment information from the received additional information and adding it as header characters to the decoded received color image data. It can be characterized by including.

As another form of the color image transmission apparatus of the present invention, the additional information may be annotation information.

As another form of the color image transmission apparatus of the present invention, the additional information may be application attribute information.

The image processing apparatus of the present invention comprises a color adjustment range setting means for setting a color range for color adjustment, a color adjustment parameter setting means for setting color adjustment parameters, and an input means for inputting color image data. A standard gamma table that does not perform color adjustment on the color image data, and a color adjustment gamma table that performs color adjustment on the color image data according to the parameters set by the color adjustment parameter setting means, Applicable range determination means for determining whether or not the color image data is within the range of colors to be adjusted by the color adjustment range setting means, and the standard gamma according to the determination result of the applied range determination means. It is characterized by further comprising a selection means for selectively switching and outputting the output from the table and the output from the color adjusting gamma table.

As another form, the image processing apparatus of the present invention adds a header character to the color image data for outputting the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means. It can be characterized in that it further comprises a header character adding means.

Further, the image processing apparatus of the present invention is based on the color adjustment range setting means for setting the color adjustment range, the color adjustment data setting means for setting the color adjustment data, and the color adjustment range and the color adjustment data. It is characterized by including a color adjusting unit for performing color adjustment, and a transmitting unit for transmitting information indicating the adjustment range and information indicating the color adjustment data.

As another form of the image processing apparatus of the present invention, the transmitting means may provide the information indicating the adjustment range and the information indicating the color adjustment data to the header information of the image data subjected to the color adjustment. Can be transmitted as.

As another form of the image processing apparatus of the present invention, the color adjustment data may be a table.

As another form of the image processing apparatus of the present invention, the color adjustment data can be set for each color component forming the input image data.

As another form, the image processing apparatus of the present invention can further be characterized by further comprising coding means for coding the image data subjected to the color adjustment. Further, the image processing apparatus of the present invention includes a receiving unit that receives the color-adjusted image data and the color adjustment information, and an image forming unit that forms the color adjustment information on a recording medium together with an image based on the image data. It is characterized by having.

In another form of the image processing apparatus of the present invention, the color adjustment information may include information indicating a color adjustment range and a color adjustment parameter.

The color image transmission method of the present invention has a standard gamma table that does not perform color adjustment on color image data and a color adjustment gamma table that performs color adjustment on the color image data according to parameters. Then, a color adjustment range setting step of setting a color range for color adjustment, a color adjustment parameter setting step of setting the color adjustment parameter, and a color image reading step of reading a document image and outputting color image data. An applicable range determination step of determining whether or not the color image data is within a color range to be subjected to the color adjustment set in the color adjustment range setting step, and the standard use according to the determination result of the applied range determination step. A selection step of selectively switching between the output from the gamma table and the output from the gamma table for color adjustment and outputting. Characterized in that it.

The image processing method of the present invention has a standard gamma table that does not perform color adjustment on color image data and a color adjustment gamma table that performs color adjustment on the color image data according to parameters. A color adjustment range setting step of setting a color range for color adjustment, a color adjustment parameter setting step of setting the parameters of color adjustment, an input step of inputting color image data, and a step of inputting color image data to the color image data. An applicable range determination step of determining whether or not the range of colors to be subjected to the color adjustment set in the color adjustment range setting step, and an output from the standard gamma table and the color according to the determination result of the applicable range determination step A selection step of selectively switching and outputting the output from the adjustment gamma table.

Further, the image processing method of the present invention is based on a color adjustment range setting step for setting a color adjustment range, a color adjustment data setting step for setting color adjustment data, and based on the color adjustment range and the color adjustment data. It is characterized by including a color adjustment step of performing color adjustment and a transmission step of transmitting information indicating the adjustment range and information indicating the color adjustment data.

Further, the image processing method of the present invention comprises a receiving step of receiving the color-adjusted image data and the color adjustment information, and an image based on the image data, and an image forming the color adjustment information on a recording medium. And a forming step.

[0030]

In the present invention, the color adjustment range setting means (111, 2) is used.
10-227; 801-812) to set the color range for color adjustment, and the color adjustment parameter setting means (111,
201 to 209) to set the color adjustment parameters, the applicable range determining means (1
04) determines whether the color image data is in the range of colors to be adjusted by the color adjustment range setting means,
The selection means (105) selectively switches between the output from the standard gamma table (102) and the output from the color adjustment gamma table (103) according to the determination result, and outputs the selected output. At this time, the standard gamma table does not perform color adjustment on the color image data, but the color adjustment gamma table performs color adjustment on the color image data according to the parameter set by the color adjustment parameter setting means. As a result, it is possible to adjust the color of only a specific color and transmit the color original document, and thus it is possible to faithfully reproduce the same color tone and brightness as the original transmission original document on the receiving side. In addition, send an image with a tone that is more faithful to the sender's intention, such as softer tones than the original document, pastel tones, hard to emphasize the primary colors, or to emphasize the blue of the sea and sky. You can also

In a preferred embodiment of the present invention,
The transmission side header character adding means (1101) adds the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means to the color image data to be transmitted as a header character. Alternatively, the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means is stored in the color adjustment information transmitting means (106) in the additional information added to the color image data to be transmitted and transmitted. Then, the color adjustment information is extracted from the additional information received by the receiving side header character adding means (108) and added to the decoded received color image data as a header character. As a result, it is possible to adjust the color of only a specific color and send a color original document, and at the same time, it is possible to confirm the color adjustment information about the range of the color adjusted and the color density parameter on the receiving side. . As a result, for example, it is easy to faithfully reproduce the same color tone and brightness as the original transmission document on the receiving side, and furthermore, the receiving side receiving the color adjustment information requests the transmitting side to appropriately change the color adjustment setting. It is also possible to satisfy the request on the receiving side.

Further, according to the present invention, the color adjustment range and the color adjustment data are set, the color adjustment is performed based on the set color adjustment range and the color adjustment data, and the information indicating the color adjustment range and the color adjustment data are obtained. Since the information shown is transmitted, the receiving side can recognize the color adjustment made on the transmitting side. Therefore, the receiving side can make a request for color adjustment to the transmitting side based on the received image.

Further, according to the present invention, the color-adjusted image data and the color adjustment information are received, and the color adjustment information is formed together with the image based on the image data on the recording medium. By adding the color adjustment information to, the user can easily recognize the color adjustment regarding the received image. Further, it is possible to immediately recognize the correspondence between the received image and the color adjustment information.

[0034]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 shows the circuit configuration of a color facsimile apparatus as a color image transmission apparatus according to the first embodiment of the present invention. In FIG. 1, 101 is a color image reading unit for reading a color original and outputting red (R), green (G), and blue (B) image signals,
02 is a standard gamma table without color adjustment, 10
3 is an adjustment gamma table for performing color adjustment, 10
Reference numeral 4 denotes an application range determination unit that determines the range of colors for which color adjustment is to be performed. Reference numeral 105 determines whether the output from the standard gamma table 102 or the adjustment gamma table 103 is determined by the application range determination unit 104. It is a MUX (multiplexer) as a selector that switches based on the result.

Reference numeral 106 denotes a JPEG encoding unit for encoding and decoding the RGB color signals output from the MUX 105 and the line control unit according to the JPEG baseline encoding system. Reference numeral 107 denotes connection and control with a line. It is a line control unit that performs the transmission and reception of code data.

Reference numeral 108 denotes a header character addition section for performing character combination using information (including color adjustment information) added to a comment marker of JPEG code at the time of reception as a header character.
Reference numeral 9 is a color space conversion unit that converts the RGB image signal received from the line into a cyan (C), magenta (M), and yellow (Y) color space depending on the characteristics of the printer.
A color image printing unit that prints out the CMY color image signals output from the color space conversion unit 109 on a recording medium (paper). Reference numeral 111 is an operation unit for an operator to perform operations associated with color facsimile transmission, and 112 is a CPU (central processing unit) that monitors and controls the entire system.

FIG. 2 shows a part for designating a color adjustment range and a part for designating the density at the time of color adjustment, which is a part of the operation section 111. In FIG. 2, 210 is R for color adjustment.
It is an indicator showing the lower limit of (red),
Is an indicator showing the upper limit of R for color adjustment.
216 is a key for decreasing the upper limit value of R, 217 is a key for increasing the upper limit value of R, 218 is a key for decreasing the lower limit value of R, 219 is a key for increasing the lower limit value of R Is the key. Similarly, G (green)
And indicators 212-21 for B (blue)
5 and keys 220-227 are provided.

Reference numeral 201 is an indicator showing a parameter of R density adjustment when performing color adjustment. Reference numeral 204 is a key for making R light, and 205 is a key for making R dark. Similarly, for G and B, indicators 202 and 203 and adjustment keys 206 to 209 are provided.

First, the operation during transmission will be described.

The operator first operates the above-mentioned keys on the operation unit 111 to specify the range of the color for which the density is to be adjusted and the parameters of the color adjustment, and then sets the color original and sets the dial key (numeric keypad not shown). ) And the transmission start key to start the transmission operation. In response to this, the color image reading unit 101 reads the color original, and the color image data from the color image reading unit 1 is input to the standard gamma table 102, the adjustment gamma table 103, and the applicable range determination unit 104. The CPU 112 sets, as the adjustment gamma table 103, a table according to the density adjustment parameter (density adjustment value) designated by the operation unit 111. An example of this adjusting gamma table 103 is shown in FIG. The horizontal axis shows the value of the input image data to this table, and the vertical axis shows the relationship of the value of the output image data from this table. When the density adjustment value is 0, the input and output data match. The CPU 112 will select and set the curve corresponding to the specified density adjustment parameter by addressing.

The applicable range determination unit 104 determines whether the input image data is included in the color range designated by the operation unit 111, and outputs the determination result. MU
In X105, the image data output from the standard gamma table 102 and the adjustment gamma table 103 is input, and the input image data is out of the applicable range (out of the specified color range) according to the determination result of the applicable range determining unit 104. If the input image data is within the applicable range (within the designated color range), the output of the adjustment gamma table 103 is selected.

The JPEG encoding unit 106 performs JPEG baseline encoding processing. The procedure of the process is shown in FIG. The encoding in the JPEG encoding unit 106 is as shown in FIG.
Raster block conversion (step S40
1), DCT processing (step S402), quantization processing (step S403), zigzag scanning (step S)
404) and Huffman encoding (step S405) are performed in this order. Also, at the time of Huffman coding (step S40
In 5), the application range of the color adjustment and the parameter of the color adjustment when the document is read are inserted into the code data by using the COM marker added to the image data.

The format is shown in FIG. here,
COM is a marker code for comments (comments),
FFFEH (H represents a hexadecimal number. The same applies hereinafter).
L _c is the application segment length and the length is B
H. C _m1 , C _m2 , C _m3 , C _m4 , C _m5 and C _m6 are
These are the minimum value R _min , the maximum value R _max , the minimum value G _min , the maximum value G _max , the minimum value B _min , and the maximum value B _max of R of the applicable range of color adjustment, respectively. C _m7 , C _m8 and C _m9 are R, G and B color adjustment parameters R _d , G _d and B _{d, respectively.}
Is.

The code data JPEG-baseline-encoded by the JEG encoding unit 106 is further processed by the line control unit 10.
It is sent to the line through 7.

Next, the operation at the time of reception will be described. The code data received from the line is input to the JPEG encoding unit 106 via the line control unit 107. FIG. 6 shows the procedure of processing in the JPEG encoding unit 106. First, Huffman decoding (step S601), zigzag scan restoration (step S602), and dequantization (step S60).
3), the IDCT process (step S604), and the block raster conversion (step S605) are performed in this order. Further, at the time of Huffman decoding (step S601), the CO
Extract M marker data.

In the header character adding section 108, the CO
The data included in the M marker is added to the decoded image data as a header character. An example of this header character is shown in FIG. In FIG. 7, for example, "R: 60-100, +3
0 "R application range is 60-100, density adjustment is +30
It means that.

The color space conversion unit 109 converts the RGB signals into CMY signals which are the color space of the printer. Finally, the color image printing unit 110 prints out the received image data and ends the receiving operation.

In the above example, the APP _n marker which is the application attribute information may be used instead of the COM marker which is the annotation information.

(Second Embodiment) Next, a second embodiment of the present invention will be described. The circuit configuration of this embodiment is the same as that of the first embodiment shown in FIG. 1, and the operation flow is also the same as that of the first embodiment shown in FIGS. Only the points different from the first embodiment will be described below.

FIG. 8 shows the operation unit 111 of the second embodiment of the present invention.
The part that specifies the range of the above color adjustment is shown. In this example, the range of color adjustment specifies the coordinates of the center color for color adjustment. Reference numerals 801, 802, and 803 are indicators showing R, G, and B coordinate values (coordinate values of the center color for color adjustment). 805, 806, 807, 808, 80
9 and 810 are keys for decreasing the coordinate value of R (8
05), a key (806) for increasing the R coordinate value, a key (807) for decreasing the G coordinate value, a key (808) for increasing the G coordinate value, and a key (809) for decreasing the B coordinate value. , B to increase the coordinate value of B (810). Color adjustment is performed on the range of the radius r centered on the center coordinate designated as described above. Reference numeral 804 is an indicator showing the size of the radius r, 811 is a key for decreasing the radius r, and 812 is a key for increasing the radius r. If the center coordinates are (R ₀ , G ₀ , B ₀ ) and the radius is r, the color space (R, G,
B) satisfies the following expression (1).

[0052]

## EQU1 ## (R-R ₀ ) ² + (G-G ₀ ) ² + (B-B ₀ ) ² ≤r ² (1) As described above, when the range for color adjustment is designated The format of the COM marker is shown in FIG. COM
Is a comment marker code and is FFFEH. L _c is the application segment length and the length is 6. C _m1 , C _m2 , and C _m3 are the central value R ₀ of R, the central value G ₀ of G, and the central value B ₀ of B of the applicable range of color adjustment, respectively. C _m4 is the radius r.

FIG. 10 shows an example of the header characters added by the header character adding unit 108 in this example. In FIG.
(R, G, B) = (80, 90, 90) indicates that the center value of R is 80, the center value of G is 90, and the center value of B is 90.

In the above example, the APPn marker may be used instead of the COM marker as in the first embodiment.

(Third Embodiment) FIG. 11 shows a circuit configuration of the third embodiment of the present invention. The difference between FIG. 11 and FIG. 1 of the first embodiment is that the MUX 105 and the JPEG encoding unit 10 on the transmission side.
6, a header character adding unit 1101 for connecting characters for adding color adjustment information to image data to be transmitted as header characters at the time of transmission is connected. Therefore, the header character adding unit 108 of FIG. 1 on the receiving side is not necessary and is omitted. As the operation portion for specifying the color adjustment range and the density at the time of color adjustment of the operation unit 111, for example, the operation portion shown in FIG. Since the other components are the same as those in FIG. 1, the description thereof will be omitted.

At the time of transmission, prior to the processing of the JPEG encoding unit 106, the header character adding unit 1101 performs a process of adding the information of the color adjustment range and the color adjustment content to the image data to be transmitted as a header character. An example of the header character at this time is the same as that shown in FIG.

Therefore, in this example, the color adjustment information, which was used in the first embodiment by the JPEG encoding unit 106 at the time of transmission, is CO.
The process of inserting the M marker into the code data is eliminated, and the process of extracting the COM marker data and adding it to the image data as a header character at the time of reception is eliminated. Similar to the first embodiment, it becomes as shown in FIG. The contents of the other operations are the same as those of the flow shown in FIG. 4 and FIG. 6 of the first embodiment, and therefore the description thereof will be omitted.

(Fourth Embodiment) In the third embodiment, as the operation portion for specifying the color adjustment range and the density at the time of color adjustment, the operation part having the configuration shown in FIG. 2 is used. Although used, it is needless to say that the operation unit having the configuration of FIG. 8 used in the second embodiment can be used in the circuit configuration of FIG. In this case, an example of the header character is as shown in FIG. Since other points are common to the third and second embodiments, the description thereof will be omitted.

In each of the above embodiments, the range for color adjustment is only one range, but it is also possible to specify a plurality of ranges and perform different color adjustments for each range.

[0060]

As described above, according to the present invention,
The following effects can be obtained.

(1) Color adjustment can be performed only for a specific color.

(2) The color range for color adjustment can be easily set.

(3) The content of color adjustment can be notified to the receiving side by adding the color range subjected to color adjustment and the parameter of color adjustment as a header character to the image to be transmitted.

(4) By notifying the receiving side of the information about the color range after the color adjustment and the parameters of the color adjustment, and printing out as a header character at the receiving side,
The contents of the color adjustment can be notified to the recipient.

(5) As a means for notifying the receiving side of the information regarding the color range after the color adjustment and the parameter of the color adjustment, the information is easily transmitted by storing it in the annotation information added to the image data. You can

(6) As a means for notifying the receiving side of the information regarding the color range subjected to the color adjustment and the color adjustment parameter, the information is easily transmitted by storing it in the application attribute information added to the image data. be able to.

(7) By setting a color adjustment range and color adjustment data, performing color adjustment based on the setting range and data, and transmitting information indicating the color adjustment range and information indicating the color adjustment data. The color adjustment made at the transmitting side can be recognized at the receiving side. Therefore, the receiving side can make a request for color adjustment to the transmitting side based on the received image.

(8) Receiving the color-adjusted image data and the color adjustment information, together with the image based on the image data,
By forming the color adjustment information on the recording medium and adding the color adjustment information to the received image, the user can easily recognize the color adjustment relating to the received image. Further, it is possible to immediately recognize the correspondence between the received image and the color adjustment information.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of a color facsimile apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an operation portion arranged in the operation unit of FIG. 1 for specifying a range for performing color adjustment and a parameter for color adjustment.

FIG. 3 is a graph showing the content of data in the adjustment gamma table of FIG.

FIG. 4 is a diagram illustrating a J performed at the time of transmission by the JPEG encoding unit in FIG.
It is a flow chart which shows the processing procedure of PEG baseline encoding.

FIG. 5 is a format diagram showing the contents of comment markers in the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a J performed at the time of reception by the JPEG encoding unit in FIG.
It is a flow chart which shows the processing procedure of PEG baseline decoding.

FIG. 7 is a plan view showing an example of adding header characters of color adjustment information according to the first embodiment of the present invention.

FIG. 8 is a plan view showing an operating portion for designating a range for performing color adjustment and a parameter for color adjustment in the second embodiment of the present invention.

FIG. 9 is a format diagram showing the contents of a comment marker in the second embodiment of the present invention.

FIG. 10 is a plan view showing an example of adding header characters of color adjustment information according to the second embodiment of the present invention.

FIG. 11 is a block diagram showing a circuit configuration of a color facsimile apparatus according to a third embodiment of the present invention.

FIG. 12 is a block diagram showing a circuit configuration of a conventional color facsimile apparatus.

[Explanation of symbols]

101 Color Image Reading Unit 102 Standard Gamma Table 103 Adjustment Gamma Table 104 Applicable Range Determining Unit 105 Multiplexer (MUX) 106 JPEG Encoding Unit 107 Line Control Units 108, 1101 Header Character Adding Unit 109 Color Space Conversion Unit 110 Color Image printing unit 111 Operation unit 201 to 203 Indicators showing R, G, B density adjustment parameters 204 to 209 R, G, B density adjustment keys 210 to 215 R, G, B upper and lower limit values Indicators 216 to 227 Keys for adjusting the upper and lower limits of R, G and B 801 to 803 Indicators indicating the coordinate values of the central colors of R, G and B 804 Indicators indicating the size of radius r 805 to 810 Keys 811 and 812 for adjusting the coordinate values of R, G and B Radius r size Key to adjust the height

Claims (20)

[Claims] 1. A color adjustment range setting unit for setting a color range for color adjustment, a color adjustment parameter setting unit for setting color adjustment parameters, and a color image reading unit for reading an original image and outputting color image data. Means, a standard gamma table that does not perform color adjustment on the color image data, and a color adjustment gamma table that performs color adjustment on the color image data according to the parameters set by the color adjustment parameter setting means. An applicable range determining unit that determines whether or not the color image data is within a color range for which color adjustment is performed by the color adjustment range setting unit; and a standard range according to a determination result of the applicable range determining unit. It is characterized by comprising a selection means for selectively switching the output from the gamma table and the output from the color adjusting gamma table. Color image transmission device to be considered. 2. The color image according to claim 1, wherein the color adjustment range setting means sets a range for performing color adjustment with an upper limit value and a lower limit value for each element of the color space of the color image data. Transmission equipment. 3. The color adjustment range setting means sets the range of colors to be adjusted by the center coordinates for performing color adjustment and the radius of the range for performing color adjustment for each element of the color space of the color image data. The color image transmission apparatus according to claim 1, wherein the color image transmission apparatus is a color image transmission apparatus. 4. A transmission-side header character adding means for adding color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means to the color image data to be transmitted as a header character. The color image transmission device according to any one of claims 1 to 3. 5. A color adjustment information transmitting means for storing the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means in additional information added to the color image data to be transmitted and transmitting the color adjustment information. 4. The receiving side header character adding means for extracting the color adjustment information from the received additional information and adding it as a header character to the decoded received color image data. The color image transmission device according to any one of claims. 6. The color image transmission device according to claim 5, wherein the additional information is annotation information. 7. The color image transmission device according to claim 5, wherein the additional information is application attribute information. 8. A color adjustment range setting means for setting a color range for color adjustment, a color adjustment parameter setting means for setting color adjustment parameters, an input means for inputting color image data, and the color image data. A standard gamma table for which color adjustment is not performed, a color adjustment gamma table for performing color adjustment on the color image data according to the parameter set by the color adjustment parameter setting unit, and for the color image data An applicable range determination means for determining whether or not the range of colors to be subjected to the color adjustment set by the color adjustment range setting means, and an output from the standard gamma table according to the determination result of the applicable range determination means An image processing apparatus comprising: a selection unit that selectively switches and outputs the output from the color adjustment gamma table. 9. A header character adding means for adding as a header character to the color image data for outputting the color adjustment information set by the color adjustment range setting means and the color adjustment parameter setting means. The image processing apparatus according to claim 8. 10. A color adjustment range setting means for setting a color adjustment range, a color adjustment data setting means for setting color adjustment data, a color adjustment means for performing color adjustment based on the color adjustment range and the color adjustment data, An image processing apparatus comprising: a transmission unit that transmits information indicating the adjustment range and information indicating the color adjustment data. 11. The transmission means transmits the information indicating the adjustment range and the information indicating the color adjustment data as header information of the image data subjected to the color adjustment. Image processing device. 12. The image processing apparatus according to claim 10, wherein the color adjustment data is a table. 13. The image processing apparatus according to claim 10, wherein the color adjustment data is set for each color component forming the input image data. 14. The image processing apparatus according to claim 10, further comprising an encoding unit that encodes the color-adjusted image data. 15. A receiving unit for receiving color-adjusted image data and color adjustment information, and an image forming unit for forming the color adjustment information on a recording medium together with an image based on the image data. Image processing device. 16. The image processing apparatus according to claim 15, wherein the color adjustment information includes information indicating a color adjustment range and a color adjustment parameter. 17. A standard gamma table that does not perform color adjustment on color image data, and a color adjustment gamma table that performs color adjustment on the color image data according to parameters, and a color that performs color adjustment. A color adjustment range setting step for setting a range of the color adjustment parameter, a color adjustment parameter setting step for setting the color adjustment parameter, a color image reading step for reading a document image and outputting color image data, and the color image data for the color image data. An applicable range determination step of determining whether or not the range of colors to be subjected to the color adjustment set by the color adjustment range setting step, and an output from the standard gamma table and the output according to the determination result of the applicable range determination step. A selection step of selectively switching and outputting the output from the color adjustment gamma table. Over image transmission method. 18. A standard gamma table that does not perform color adjustment on color image data, and a color adjustment gamma table that performs color adjustment on the color image data according to parameters, and a color that performs color adjustment. A color adjustment range setting step for setting the range, a color adjustment parameter setting step for setting the parameters for color adjustment, an input step for inputting color image data, and a color adjustment range setting step for the color image data. An applicable range determination step of determining whether or not the set color range is to be adjusted, and an output from the standard gamma table and the output from the color adjustment gamma table according to the determination result of the applicable range determination step. An image processing method, comprising: a selection step of selectively switching and outputting the output. 19. A color adjustment range setting step of setting a color adjustment range, a color adjustment data setting step of setting color adjustment data, a color adjustment step of performing color adjustment based on the color adjustment range and the color adjustment data, And a transmitting step of transmitting information indicating the adjustment range and information indicating the color adjustment data. 20. A receiving step of receiving color-adjusted image data and color adjustment information, and an image forming step of forming the color adjustment information on a recording medium together with an image based on the image data. Image processing method.