JP2006237740A - System and apparatus for processing color image, and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and apparatus for processing a color image, and a program thereof whereby a color displayed on a monitor screen can be reproduced with fidelity without using a color conversion table and profile edit software and then printed. <P>SOLUTION: The system includes: a monitor; a print section; a user information storage section; a color conversion table generating section; a storage section; and an input value conversion section. The system displays a color designated by a user on the monitor and allows the print section to print out peripheral colors. The user compares the color displayed on the monitor with the printed peripheral colors, selects a color desirably corresponded to the designated color on the screen among the printed peripheral colors, and stores the selected color to the user information storage section. The color conversion table generating section obtains a color value designated by the user and correction color values corresponding to the peripheral colors on the basis of the data stored in the user information storage section to generate a color conversion table. The input value conversion section uses the color conversion table to convert an original image on the basis of the correction value when printing the original image and provides an output of the result. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a color image processing system, a color image processing apparatus, and a program therefor, including an apparatus having a printout function such as a color electrophotographic printer, a color copying apparatus, and an ink jet printer, and an apparatus for processing image data. The present invention relates to a color image processing system having a printer driver capable of faithfully realizing color reproduction of a specific color, a color image processing apparatus, and a program thereof.

  Conventionally, RGB (red, green, blue) color systems are generally used in display devices (monitors), scanners, digital cameras, and the like. This is a method of generating colors by a technique (additive color mixture) that becomes white when RGB colors are mixed, and each RGB color is generally expressed by a numerical value of 0-255. On the other hand, the CMYK (cyan, magenta, yellow, black) color system is used for printing in a color printer or the like. This is a method of generating a color by a technique (subtractive color mixture) that becomes black when CMYK colors are mixed.

  Image data created or captured by application software, image scanners, etc. in systems such as host devices are often handled as RGB color system data, and monitors, etc., display color based on this RGB data. To do. On the other hand, the printer performs color printing by converting the RGB data into CMYK color system data. Processing of image data at the time of printing, that is, processing of conventional color data until image data is output from the host computer to the printer and colors are reproduced will be described below.

  RGB color system color image data output from the host computer is input to a color conversion processing unit in the printer. The color conversion processing unit has a color conversion table that describes the relationship between the RGB color values at the respective grid points when the color space of the RGB color system is divided into a grid and the corresponding CMYK color values. Yes. The input RGB color system color image data is converted into CMYK color system image data by referring to this color conversion table. Data other than the grid points can be obtained by performing an interpolation operation. The CMYK data thus converted becomes data for driving the print engine of the printer, and a color image is printed by controlling the amount of ink and toner according to this data.

  By the above method, the image displayed on the monitor screen by the host computer is printed on the paper surface by the printer, but the color of the image to be printed is the type of the printer, the components of the ink and pigment used by the printer, The color displayed on the screen is often different depending on various factors such as the amount of impurities, printing method, temperature, humidity, printer aging, etc. Therefore, various attempts have been made to eliminate the difference between the color displayed on the screen and the color printed on the paper by the printer, and to realize the color of the screen faithfully on the paper by the printer.

  For example, a method is known that enables the printer to faithfully reproduce the color displayed on the screen on the paper by using profile editing software or re-editing the color conversion table inside the printer. Yes. However, the use of profile editing software is often complicated and difficult for the user, and many of the profile editing software are relatively expensive. Furthermore, re-editing the color conversion table inside the printer is not easy because the data amount of the color conversion table is large and a long time is required for processing. Therefore, recently, a correction table is created by comparing the screen color with the printed color without editing the color conversion table inside the printer or using profile editing software. The method used is frequently used.

  The following Patent Document 1 (Japanese Patent Laid-Open No. 7-288704) prints patch data, which is a sample of color data, reads it using a colorimetric device, and compares this colorimetric value with the original data. Discloses a technique for generating color correction data. This color correction data is used especially in the printer driver, and when outputting image data from the host computer to the printer, the printer driver corrects the color data while referring to the color correction data, and the corrected CMYK data is sent to the printer. Send it out.

  Patent Document 2 below (Japanese Patent Laid-Open No. 2002-290753) generates several peripheral colors in which the color, saturation, and brightness are changed from predetermined representative colors and displays them on the screen. The representative color is printed using the color profile, the user compares the printed representative color with the peripheral color of the screen, selects the closest color, and uses the color conversion information of the closest color. A color printer is disclosed that performs calculations for converting the original color conversion information and reflects the adjustment information in the color profile.

  Furthermore, the following Patent Document 3 (Japanese Patent Laid-Open No. 10-285417) prints an original image displayed on a monitor by a printer, displays the printed image side by side, and the user displays two images. A technique is disclosed in which the color of the original image is adjusted to be the same as the color of the printed image while the colors are intended to be realized by the printer.

JP 7-288704 A JP 2002-290753 A Japanese Patent Laid-Open No. 10-285417

  However, in the color correction method disclosed in Patent Document 1, it is necessary to use a colorimetric device, and it is difficult for a user without a reading device to adjust the hue so as to match his or her sensitivity. In the case of the image processing system using the color correction method disclosed in Patent Documents 2 and 3, the user fixes the printed color and adjusts or selects the color of the screen. This is to perform color correction, contrary to the user's feeling that the user wants to fix the color of the screen and adjust the color of the print. Accordingly, the main objects of the present invention are (1) making it possible to faithfully reproduce and print colors displayed on the monitor screen without editing the color conversion table or color profile, and (2) printing. (3) Fix the color displayed on the screen and adjust the color to be printed so that the user can easily operate it. The color correction is performed by adopting the method to do this.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is directed to display means for displaying a predetermined setting screen or the like in the input color space, and to convert the input color space data into the output color space for printing. A color image processing system that realizes color reproduction of an original image so as to obtain a desired output result.
Display control means for displaying a color value of a predetermined input color space designated by the user and a plurality of peripheral colors thereof on the display means;
Print control means for converting the specified input color space color values and the plurality of peripheral colors into color values of an output color space by the printing means;
User information holding means for storing the color value of the designated input color space in association with one color value selected by the user from among the color values of the plurality of peripheral colors of the printed output color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Color conversion table creation means for creating a color conversion table for conversion to
Storage means for storing the color conversion table;
Input value conversion means for converting the input original image using the color conversion table and then outputting to the printing means.

  The invention according to claim 2 of the present application relates to the color image processing system according to claim 1, wherein the color conversion table creating means calculates color values of peripheral colors of color values of the designated input color space. Calculating a corrected peripheral color value reflecting a change amount between the color value of the designated input color space and the corrected color value, and detecting the color value of the peripheral color when the color value of the peripheral color is detected; A color conversion table for converting to corrected peripheral color values is created.

The invention according to claim 3 of the present application includes a display unit that displays a predetermined setting screen or the like in the input color space, and a printing unit that converts the data of the input color space into the output color space and prints it. In a color image processing apparatus that realizes color reproduction of an original image so that an output result of
Display control means for causing the display means to display color values of the input color space designated by the user;
Print control means for converting the color value of the designated input color space and a plurality of peripheral colors thereof into color values of the output color space by the printing means and printing;
User information holding means for storing the color value of the designated input color space in association with one color value selected by the user from among the color values of the plurality of peripheral colors of the printed output color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Color conversion table creation means for creating a color conversion table for conversion to
Storage means for storing the color conversion table;
Input value conversion means for converting the input original image using the color conversion table and then outputting to the printing means.

  The invention according to claim 4 of the present application relates to the color image processing apparatus according to claim 3, wherein the color conversion table creating means calculates color values of peripheral colors of color values of the designated input color space. Calculating a corrected peripheral color value reflecting a change amount between the color value of the designated input color space and the corrected color value, and detecting the color value of the peripheral color when the color value of the peripheral color is detected; A color conversion table for converting to corrected peripheral color values is created.

The invention of the program according to claim 5 of the present application comprises display means for displaying a predetermined setting screen or the like in the input color space, and printing means for converting the data of the input color space into the output color space for printing. In the computer constituting the color image processing apparatus,
Processing for displaying the color value of the input color space designated by the user on the display means;
A process of printing the color value of the designated input color space and the plurality of peripheral colors by the printing means;
A process of associating and storing one color value selected by the user from among the color values of a plurality of peripheral colors of the printed output color space to the color value of the designated input color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Processing to create a color conversion table for conversion to
A process of converting the input original image using the color conversion table and then outputting to the printing means.

  The invention according to claim 6 of the present application relates to the program according to claim 5, wherein the color conversion table further calculates a color value of a surrounding color of the color value of the specified input color space, A corrected peripheral color value that reflects the amount of change between the color value of the specified input color space and the corrected color value is calculated, and when the color value of the peripheral color is detected, this color value is calculated as the corrected peripheral color value. It is characterized by converting into.

  According to the first aspect of the present invention, since the above feature is provided, faithful color reproduction can be easily realized without re-editing the printer driver or the color conversion table inside the printer. Further, color adjustment can be performed without using a colorimetric means for measuring the color of a printed image. Furthermore, since the color displayed on the screen is fixed and color correction is performed by adjusting the color to be printed, the user's operation required for the correction work is facilitated.

  Further, in the invention according to claim 2, in the color conversion table creating means, not only the correction color value is associated with the designated color value, but the correction peripheral color is associated with the peripheral color of the designated color value, Since the relationship between the designated color value and the correction color value can be reflected, the peripheral colors of the designated color can be printed more faithfully.

  Further, in the invention according to claim 3, as in the invention according to claim 1, color image processing enabling easy faithful color reproduction without re-editing the printer driver or the color conversion table in the printer. An apparatus can be realized.

  Further, in the invention according to claim 4, in the color conversion table creating means, not only the correction color value is associated with the designated color value, but the correction peripheral color is associated with the peripheral color of the designated color value, Since the relationship between the designated color value and the correction color value can be reflected, the peripheral colors of the designated color can be printed more faithfully.

  Further, in the invention according to claim 5, similar to the invention according to claim 1, color image processing enabling easy faithful color reproduction without re-editing the printer driver or the color conversion table inside the printer. An operation program for the apparatus can be realized.

  In the invention according to claim 6, the color conversion table is designated not only by associating the correction color value with the designated color value but also by associating the correction peripheral color with the peripheral color of the designated color value. Therefore, the operation program of the color image processing apparatus that can more faithfully print the peripheral colors of the designated color can be realized.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings.

  The configuration and function of a color image processing system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram of a color image processing system of the present invention. The color image processing system includes a host computer 100, a monitor 160, and a color printer 170. The monitor 160 and the color printer 170 are each connected to the host computer 100 by a connection cable or the like. The host computer 100 includes a control unit 120, an input operation unit 130, image data 140, an image data transmission unit 150, and a printer driver 110. The control unit 120 is a CPU or the like and controls the basic operation of the host computer. In the present invention, the control unit 120 operates the printer driver 110 on the computer. The input operation unit 130 is an input device such as a keyboard and a mouse, and allows the user to input arbitrary information to the computer by operating the keyboard and mouse. It is assumed that the image data 140 is stored in the RAM of the computer and is created by another application program that operates on the host computer, or is captured in the computer by a scanner or a digital camera. The image data transmission unit 150 outputs the image data processed by the printer driver 110 to the color printer 170. The color printer 170 receives RGB color system image data from the host computer 100, converts it into CMYK data using a printer-side color conversion table or the like housed in the color printer, and converts the image onto the paper surface. To form. This printer-side color conversion table is created in advance by a printer manufacturer, and the corresponding color value is slightly different for each manufacturer.

  The printer driver 110 is stored in the hard disk or the like of the host computer 100, and is read out to the computer memory and executed by the control unit 120 when the user attempts to adjust / print an arbitrary image. The printer driver 110 includes a monitor display control unit 111, a test print data creation unit 112, a user information holding unit 113, a color conversion table creation unit 114, a storage unit 115, an input value conversion unit 116, and a data reception unit 117. The monitor display control unit 111 outputs and displays the read image data 140 and the color of the input color space designated by the user on the monitor 160 connected to the host computer. The test print data creation unit 112 generates the color of the input color space designated by the user and its peripheral color, transmits them to the image data transmission unit 150, and causes the color printer 170 to output test patch paper. The user information holding unit 113 stores the color value of the color in the input color space designated by the user and one color value selected by the user from the peripheral colors printed on the paper surface by the color printer 170. To do. Further, the user information holding unit 113 generates a peripheral color having a color value designated by the user. The color conversion table creating unit 114 calculates the color value of the input color space designated by the user and the color value of the input color space corresponding to the color value of the output color space selected by the user among the printed peripheral colors. The associated color conversion table 118 is created. Further, a corrected peripheral color corresponding to the peripheral color of the color value designated by the user is calculated and associated, and added to the color conversion table 118. The storage unit 115 stores the color conversion table 118 created by the color conversion table creation unit 114. The input value conversion unit 116 refers to the color conversion table 118 stored in the storage unit 115 for the image data 140 (RGB color system) read into the memory of the host computer 100 by the data reception unit 117. Conversion / correction is performed, and the corrected image data (RGB color system) is sent to the image data transmission unit 150 of the host computer. The image data is converted into CMYK data by a printer-side color conversion table inside the color printer 170 and output to paper or the like.

  Next, the operation of the printer driver 110 will be described in more detail with reference to FIGS. FIG. 2 shows a change designation dialog box 200 displayed on the monitor 160 when the printer driver is started up. The change designation dialog box 200 is provided with an RGB value input field 210 to be changed, and the user can input the RGB value of the color to be changed. In the change designation dialog box 200, an OK button 220 and a cancel button 230 are displayed. When confirming the input RGB values and proceeding to the next operation, the OK button 220 is selected by the input operation unit 130 of the host computer 100 such as a mouse. When the cancel button 230 is selected, this change designation can be interrupted. When the OK button 220 is selected, the user information holding unit 113 saves the color value of the input color space designated by the user and calculates the surrounding color. The method for calculating the peripheral color will be described in detail later.

  FIG. 3 shows an RGB value adjustment dialog box 300 displayed on the monitor 160. In FIG. 3, the RGB value adjustment dialog box 300 includes a designated RGB value display field 310 for displaying the RGB value of the color to be changed designated by the user in the above-described operation, and a change target color display portion for displaying the color image. 320 is displayed. A plurality of peripheral colors 330 calculated by the user information holding unit 113 and corresponding to the user-specified color are displayed below them. Each peripheral color is numbered. Further, the RGB value adjustment dialog box 300 is provided with a test print button 340 and a cancel button 350. When the test print button 340 is selected, the next operation can be performed. When the cancel button 350 is selected, the process is interrupted and the process returns to the change designation dialog box 200.

  When the test print button 340 is selected in the RGB value adjustment dialog box 300, the test print data creation unit 112 creates test patch print output data in which a plurality of colors designated by the user and their peripheral colors are arranged, and an image data transmission unit The data is sent to the color printer 170 via 150.

  FIG. 4 shows a test patch print output 400 printed by the color printer 170. In FIG. 4, the test patch print output 400 includes an uncorrected image 410 and a plurality of peripheral output colors 420. The uncorrected image 410 is realized by the color corresponding to the RGB value designated by the user, that is, the CMYK output color space, and the peripheral output color 420 is calculated by the user information holding unit 113 by the above-described operation. The peripheral color 330 in the input color space is converted by the printer side color conversion table inside the color printer 170 and output. Peripheral output colors 420 are numbered sequentially.

  FIG. 5 shows a change setting dialog box 500 displayed at the time of test patch print output. 5, the change setting dialog box 500 includes a specified RGB value display field 510 (the same as the RGB value display field 310 to be changed in FIG. 3) for displaying the RGB value specified by the user and the change color 520. (Same as the image 320 in FIG. 3) is displayed. Further, a set value input field 530, a color conversion table creation button 540, and a cancel button 550 are provided. The user compares the change color 520 displayed in the change setting dialog box 500 with the plurality of peripheral output colors 420 printed on the test patch print output 400. Then, from among the peripheral output colors 420 of the test patch print output 400, the one that feels closest to the change color 520 of the change setting dialog box 500 is selected, and the number is input to the setting value input field 530. Next, when the user selects the color conversion table creation button 540, the user information holding unit 113 stores the RGB value to be changed in association with the output color 330 selected by the user, and the color conversion table creation unit 114 is described later. The color conversion table 118 is created by the method, and the color change process is completed. When the cancel button 550 is selected, the process is interrupted and the process returns to the change designation dialog 200. Here, the user selects the closest output color 520 on the screen from the peripheral output colors 420 of the test patch print output 400, but arbitrarily selects the user's favorite color from the peripheral output colors 420. You may choose

  Next, a method of creating the color conversion table 118 in the color conversion table creation unit 114 will be described with reference to FIGS. FIG. 6 shows a peripheral color table 800 created by the test print data creation unit 112. In FIG. 6, the peripheral color table 800 includes a color value (specified RGB value) 810 of an input color space specified by the user and a peripheral RGB value 820 thereof.

  FIG. 7 shows a user information holding unit when a user selects an RGB value to be changed and a CMYK value of an output color space to be actually printed correspondingly by using the printer driver program. The user information table 850 created by 113 is shown. In FIG. 7, the user information table 850 associates a specified RGB value 860 specified by the user with an RGB peripheral color value 870 corresponding to the color value selected by the user from the peripheral output colors 420. The peripheral color value 870 of this input color space is set as a corrected RGB value.

The color conversion table creation unit 114 refers to the user information table 850 created by the user information holding unit 113 and creates the color conversion table 118 by the method described below. First, the color conversion table creation unit 114 refers to the user information table 850 to obtain a difference or change amount A between the designated RGB value 860 and the corrected RGB value 870. This amount of change A can be the distance from the position of the designated RGB value to the position of the corrected RGB value when the RGB color space is divided into a grid. Next, the RGB value at each lattice point within a certain range B around the designated RGB value is set as the peripheral RGB value, and the peripheral RGB correction value is calculated for each peripheral RGB value. The following formula 1 is used as the correction value calculation method.
Peripheral RGB correction value = {(Constant range distance B−Distance from each specified RGB value to each peripheral RGB value) / Constant range distance B} × Change A (Formula 1)

  FIG. 8 shows a correction table 850 ′ created by the color conversion table creation unit 114. The color conversion table creation unit 114 calculates Equation 1 for each peripheral RGB value at each lattice point within a certain range B, calculates the peripheral RGB correction value corresponding to each peripheral RGB value, and then A correction table 850 ′ is created. The correction table 850 ′ includes the specified RGB value 860 described above, the corrected RGB value 870 corresponding to the specified RGB value 860, the peripheral RGB value 880, and the corrected peripheral RGB correction value 890 corresponding thereto. The color conversion table 118 created in this way is stored in the storage unit 115 and is referred to when the print data is corrected.

  FIG. 9 shows an operation flow of a program in the printer driver program or application program of the present invention. This program corresponds to the monitor display control unit 111, the test print data creation unit 112, the user information holding unit 113, the color conversion table creation unit 114, and the input value conversion unit 116 in the printer driver 110, and is executed by the control unit 120. Is done. When the application program is activated by a user operation or a request from the host computer, the application program obtains an RGB value to be changed input by the user through the change designation dialog box 200 (S-910). Next, the color of the RGB value designated by the user and the surrounding color are generated and output to the monitor (S-920). Further, the color designated by the user and the peripheral color are output to the printer (S-930). The color value selected by the user is obtained by comparing the color displayed on the screen with the printed peripheral color (S-940). Next, the RGB value set by the user and the corrected RGB value corresponding to the color of the printer output selected by the user are stored in the user information holding unit 113 (S-951). Next, the peripheral color value of the RGB value set by the user is obtained, the peripheral color correction value corresponding to it is calculated, and the color conversion table 118 is created (S-952). When image data from the host computer is acquired (S-960), the RGB data of the image is converted into corrected RGB data while referring to the color conversion table 118, and the corrected RGB data is sent to the color printer 170 (S-970). ).

  As described above, according to the embodiment of the present invention, the colors displayed on the monitor screen can be faithfully reproduced and printed without editing the color conversion table or the color profile. Further, color adjustment can be performed without using a colorimetric means for measuring the color of a printed image. Furthermore, since the color displayed on the screen is fixed and the color correction is performed by adjusting the printed color, the user's operation required for the correction work is facilitated.

1 is a schematic diagram of a color image processing system in an embodiment of the present invention. It is a figure which shows the change designation | designated dialog box in the Example of this invention. It is a figure which shows the RGB value adjustment dialog box in the Example of this invention. It is a figure which shows the test print output in the Example of this invention. It is a figure which shows the change setting dialog box in the Example of this invention. It is a figure which shows the peripheral color table created by the test print data creation part in the Example of this invention. It is a figure which shows the user information table produced by the user information holding part in the Example of this invention. It is a figure which shows the correction table produced by the color conversion table preparation part in the Example of this invention. It is an operation | movement flow of the color image processing system in the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Host computer 110 ... Printer driver 111 ... Monitor display control part 112 ... Test print data creation part 113 ... User information holding part 114 ... Color conversion table creation part 115 ... Storage unit 116 ... input value conversion unit 117 ... data reception unit 118 ... color conversion table 130 ... input operation unit 140 ... image data 150 ... image data transmission unit 160 ... monitor 170 ... Color printer

Claims (6)

An original image having a display means for displaying a predetermined setting screen or the like in an input color space and a printing means for converting the data of the input color space into an output color space and printing, so that a desired output result can be obtained. In color image processing system that realizes color reproduction of
Display control means for displaying a color value of a predetermined input color space designated by the user and a plurality of peripheral colors thereof on the display means;
Print control means for converting the specified input color space color values and the plurality of peripheral colors into color values of an output color space by the printing means;
User information holding means for storing the color value of the designated input color space in association with one color value selected by the user from among the color values of the plurality of peripheral colors of the printed output color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Color conversion table creation means for creating a color conversion table for conversion to
Storage means for storing the color conversion table;
A color image processing system comprising: an input value conversion unit that converts an input original image using the color conversion table and then outputs the converted image to a printing unit.   The color conversion table creation means calculates a color value of a peripheral color of the color value of the designated input color space, and reflects the amount of change between the color value of the designated input color space and the correction color value. 2. The color according to claim 1, further comprising: generating a color conversion table that calculates a corrected peripheral color value and converts the color value into the corrected peripheral color value when the color value of the peripheral color is detected. Image processing system. A display unit for displaying a predetermined setting screen or the like in the input color space; and a printing unit for converting the data of the input color space into the output color space for printing, so that a desired output result can be obtained. In a color image processing device that realizes color reproduction,
Display control means for causing the display means to display color values of the input color space designated by the user;
Print control means for converting the color value of the designated input color space and a plurality of peripheral colors thereof into color values of the output color space by the printing means and printing;
User information holding means for storing the color value of the designated input color space in association with one color value selected by the user from among the color values of the plurality of peripheral colors of the printed output color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Color conversion table creation means for creating a color conversion table for conversion to
Storage means for storing the color conversion table;
A color image processing apparatus comprising: an input value conversion unit that converts an input original image using the color conversion table and then outputs the converted image to a printing unit.   The color conversion table creation means calculates a color value of a peripheral color of the color value of the designated input color space, and reflects the amount of change between the color value of the designated input color space and the correction color value. 4. A color conversion table according to claim 3, further comprising: generating a color conversion table for calculating a corrected peripheral color value and converting the color value to the corrected peripheral color value when the color value of the peripheral color is detected. Image processing device. A computer constituting a color image processing apparatus comprising: display means for displaying a predetermined setting screen or the like in an input color space; and printing means for converting data in the input color space into an output color space for printing.
Processing for displaying the color value of the input color space designated by the user on the display means;
A process of printing the color value of the designated input color space and the plurality of peripheral colors by the printing means;
A process of associating and storing one color value selected by the user from among the color values of a plurality of peripheral colors of the printed output color space to the color value of the designated input color space;
The color value of the input color space corresponding to the color value of the output color space selected by the user is set as a correction color value, and this color value is detected when the color value of the designated input color space is detected. Processing to create a color conversion table for conversion to
A program for converting an input original image using the color conversion table and then outputting the converted image to a printing unit.   The color conversion table further calculates a color value of a surrounding color of the color value of the designated input color space, and reflects a change amount between the color value of the designated input color space and the correction color value. 6. The program according to claim 5, wherein a correction peripheral color value is calculated, and when the color value of the peripheral color is detected, the color value is converted into the correction peripheral color value.

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