JP4803048B2 - Image processing apparatus and image processing program - Google Patents

Description

  The present invention relates to an image processing apparatus and an image processing program, and more particularly to an image processing apparatus and an image processing program for processing data in a plurality of different color spaces.

  There are situations where it is desired that the color printed on the paper by an image output device such as an MFP (Multi Function Peripherals) is a color that accurately reproduces the specific color. The MFP is a device having a plurality of functions such as a printer, a FAX, and a scanner. Here, it is assumed that the specific color is a color that is always desired to be expressed in the same color, such as a company symbol mark. Accordingly, the specific color is, for example, a color having a predetermined hue, lightness, and saturation.

  Next, when a specific color is output by the image output apparatus, a process for the user to set so that the output color becomes a color that accurately reproduces the specific color will be described.

  FIG. 14 is a diagram for explaining processing for outputting a color in which a specific color is accurately reproduced by a conventional method.

Referring to FIG. 14, the user acquires color data of specific color ORCL printed on sample paper ORP using colorimeter 200. Here, it is assumed that the color data acquired by the colorimeter 200 is expressed by L ^* a ^* b ^* values. The L ^* a ^* b ^* value data is device-independent measurement data in the CIELAB color space. The CIELAB color space is a device-independent color space. The colorimeter 200 transmits the acquired color data of the specific color ORCL to the image processing device 5000. The image processing device 5000 is, for example, a PC (Personal Computer).

  The image processing device 5000 receives the color data of the specific color ORCL. Further, the image processing device 5000 acquires an ICC profile (hereinafter also referred to as an output device ICC profile) currently held by the image output device 700 from the image output device 700. The output device ICC profile includes a lookup table (hereinafter also referred to as an output device lookup table). In the following, the lookup table is also simply referred to as LUT.

Here, the output device lookup table included in the acquired output device ICC profile is a data table indicating device-dependent color characteristics that can be expressed by the image output device 700. Here, the output device lookup table includes a plurality of color conversion data. The color conversion data included in the output device lookup table is data in which L ^* a ^* b ^* values are associated with CMYK values.

Note that the output device lookup table does not include color conversion data corresponding to each of all L ^* a ^* b ^* values in the CIELAB color space. The output device lookup table includes color conversion data corresponding to each of a plurality of L ^* a ^* b ^* values respectively corresponding to a plurality of representative colors.

Then, the image processing device 5000 uses the acquired output device lookup table to convert the color data of the specific color ORCL expressed by L ^* a ^* b ^* values into color data expressed by CMYK values (hereinafter referred to as “CMYK values”). Output device color data).

If the color conversion data corresponding to the L ^* a ^* b ^* value indicated by the color data of the specific color ORCL is present in the output device lookup table when converting the color data, the CMYK value indicated in the corresponding color conversion data Is output device color data.

On the other hand, when the color data is converted, if the color conversion data corresponding to the L ^* a ^* b ^* value indicated by the color data of the specific color ORCL is not in the output device look-up table, the image processing device 5000 will display the specific color ORCL. L ^* a ^* b ^* -CMYK interpolation calculation processing for calculating the CMYK value is performed using the L ^* a ^* b ^* value indicated by the color data and the output device lookup table.

Here, the L ^* a ^* b ^* -CMYK interpolation calculation process is a general calculation method disclosed in paragraphs 0008 to 0015 of JP 2001-333285 A (Patent Document 1), for example. is there. The value of K in CMYK is calculated by an expression similar to the expression for obtaining C described in paragraph 0014 of JP 2001-333285 A (Patent Document 1). The CMYK value calculated by the above L ^* a ^* b ^* -CMYK interpolation calculation process becomes the output device color data. Hereinafter, the technique disclosed in Japanese Patent Laid-Open No. 2001-333285 (Patent Document 1) is also referred to as a first prior art.

  Then, the image processing apparatus 5000 displays the calculated CMYK values (for example, 20, 3, 20, 2) on the display as reference values for setting specific color data.

  The user performs a printing operation using a mouse or the like (not shown) connected to the image processing apparatus 5000. Here, the printing operation is an operation for the image processing device 5000 to transmit the output device color data to the image output device 700. Here, it is assumed that the image output apparatus 700 is an MFP.

  When a printing operation is performed, the image processing device 5000 transmits output device color data to the image output device 700.

  The image output device 700 outputs the paper OUTP on which the color OUTCL is printed based on the received output device color data. The user visually compares the color OUTCL printed on the paper OUTP output from the image output device 700 with the original specific color ORCL printed on the sample paper ORP, and the color OUTCL accurately reproduces the specific color ORCL. Make sure that the color is correct (hereinafter also referred to as the exact reproduction color).

  If the color OUTCL is not an accurately reproduced color, the user changes any of the CMYK values displayed on the display by operating a keyboard or a mouse (not shown) connected to the image processing device 5000. The changed CMYK values (for example, 19, 3, 20, 2) are stored in the image processing device 5000. Then, the user performs a printing operation again.

  When a printing operation is performed, the image processing device 5000 uses the changed CMYK value as output device color data. Then, the image processing device 5000 transmits the output device color data to the image output device 700.

  The image output device 700 outputs the paper OUTP on which the color OUTCL is printed based on the received output device color data, as described above. As described above, the user confirms whether the color OUTCL is a color that accurately reproduces the specific color ORCL (accurate reproduction color).

If the color OUTCL is not an accurate reproduction color, again, as described above, the CMYK value is changed and a printing operation is performed, so that the color OUTCL accurately reproduces the specific color ORCL (accurate reproduction color). Check if it is. When the color OUTCL is an accurate reproduction color, the user uses the color data of the specific color ORCL expressed by the L ^* a ^* b ^* value acquired by the colorimeter 200 and the changed CMYK value. The operation of associating and storing in the image processing apparatus 5000 is performed with a mouse or the like.

  With the above processing, the CMYK values of the specific color ORCL can be set according to the characteristics of the image output apparatus 700. That is, color data of a specific color can be set.

  In general, image output devices such as printers and MFPs, for example, as the number of printing processes increases, the color printed on paper is more accurate even if the data of a specific color set in advance is used. There is a problem that there is a tendency that the reproduced color (accurately reproduced color) is not obtained. Further, the image output apparatus has a problem that the specific color set in advance may not be a color that accurately reproduces the specific color (accurate reproduction color) even when the environment changes. The environmental change is, for example, a change in temperature, humidity, and the like.

In order to solve the above problem, Japanese Patent Application Laid-Open No. 2006-217420 (Patent Document 2) discloses a technique for obtaining a target color with high accuracy by generating a correction patch based on a color variation state ( Hereinafter, the second prior art is also disclosed.
JP 2001-333285 A JP 2006-217420 A

  The user performs an operation for re-creating the ICC profile (hereinafter also referred to as a re-creation operation) on the image processing device 5000 in order to prevent a decrease in reproducibility of the color output from the image output device. The re-creation operation is performed, for example, when the image output apparatus performs the printing process a predetermined number of times (for example, 200 times) or when a predetermined period (for example, two months) has elapsed.

  The image processing device 5000 stores a profile creation program. The profile creation program is a program for newly creating or re-creating a lookup table included in the ICC profile. When the re-creation operation is performed, the image processing apparatus 5000 transmits a patch print instruction for printing a plurality of patches corresponding to a plurality of representative colors to the image output apparatus.

The image output apparatus outputs paper on which a plurality of patches corresponding to a plurality of CMYK values are printed in response to a patch printing instruction. Then, the image processing apparatus 5000 measures a plurality of patches printed on paper using the colorimeter 200, and a plurality of L ^* a ^* b corresponding to the plurality of patches (a plurality of CMYK values), respectively. ^{* Get} value data.

Then, the image processing apparatus 5000 that executes the profile creation program stores the data of the plurality of L ^* a ^* b ^* values so that the numerical values of the data of the plurality of L ^* a ^* b ^* values are equally spaced. Reconfigure. The image processing apparatus 5000 that executes the profile creation program calculates CMYK values respectively corresponding to the reconstructed plurality of L ^* a ^* b ^* values. With the above processing, the lookup table is recreated.

  Even if the lookup table included in the ICC profile of the image output apparatus is re-created, the CMYK values of the specific color data set in advance remain the values created based on the lookup table before the re-creation. Therefore, for example, when the image output apparatus performs the printing process a predetermined number of times (for example, 200 times) or more, the image output apparatus cannot output a color that accurately reproduces the original specific color.

  Therefore, in order to output a color that accurately reproduces the specific color, the user needs to store the data of the specific color every time the lookup table of the image output device is re-created, as described above with reference to FIG. It is necessary to reset. Therefore, even when the lookup table is re-created, there is a problem that it takes much time for the user to output a color in which the specific color is accurately reproduced by the image output apparatus. A method for solving this problem is not disclosed in the first and second prior arts.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to perform image processing that allows an image output apparatus to accurately reproduce a specific color without much effort. An apparatus and an image processing program are provided.

In order to solve the above-described problem, an image processing apparatus according to an aspect of the present invention acquires a profile that associates a device-independent first color space with a second color space that can be reproduced by the image output apparatus. The specific color is obtained by associating the acquisition unit, the first color data that is data indicating the specific color in the first color space, and the second color data that is data indicating the specific color in the second color space with the profile. A color conversion table indicating color characteristics of an image output device included in a profile and registration means for registering as data, wherein the first data in the first color space corresponds to the second data in the second color space a determination unit configured to determine whether the table changes including association with a plurality of color conversion data is data, when it is determined that the color conversion table is changed by the determining means, variable Based on the color conversion table, and a changing means for changing the second color data of the specific color data.

  Preferably, the specific color data registered by the registration means cannot be changed except by the change means.

According to another aspect of the present invention, there is provided an image processing program executed by an image processing apparatus, wherein the image processing program includes a device-independent first color space and a second color that can be reproduced by the image output device. An acquisition step of acquiring a profile that associates a space; first color data that is data indicating a specific color in the first color space; and second color data that is data indicating the specific color in the second color space. A registration step of registering as specific color data in association with a profile, a color conversion table indicating color characteristics of the image output device included in the profile, the first data in the first color space, and the second color a determining step of determining whether or not the table has been modified to include a plurality of color conversion data is data associating the second data in the space, the judgment step When the color conversion table Ri is determined to have been changed, based on the modified color conversion table, and a changing step of changing the second color data of the specific color data.

  Preferably, the specific color data registered in the registration step cannot be changed except for the change in the change step.

  The image processing apparatus according to the present invention is first color data that is data indicating a specific color in the first color space, and data that is data indicating the specific color in the second color space that can be reproduced by the image output apparatus. Two-color data is registered as specific color data in association with the profile. When it is determined that the color conversion table indicating the color characteristics of the image output apparatus has been changed, the second color data of the specific color data is changed based on the changed color conversion table. In this case, the user does not have to re-set the specific color data every time the color conversion table is changed.

  Therefore, the image output apparatus can accurately reproduce the color based on the second color data corresponding to the specific color data even if the color conversion table is changed. That is, the image processing apparatus has an effect that the specific color can be accurately reproduced by the image output apparatus without much effort.

  The image processing program according to the present invention is first color data that is data indicating a specific color in the first color space, and data that is data indicating the specific color in the second color space that can be reproduced by the image output apparatus. Two-color data is registered as specific color data in association with the profile. When it is determined that the color conversion table indicating the color characteristics of the image output apparatus has been changed, the second color data of the specific color data is changed based on the changed color conversion table. In this case, the user does not have to re-set the specific color data every time the color conversion table is changed.

  Therefore, the image processing program executed by the image processing apparatus can accurately reproduce the color based on the second color data corresponding to the specific color data even if the color conversion table is changed. In other words, the image processing program has an effect that a specific color can be accurately reproduced by the image output apparatus without much effort.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
(System configuration)
FIG. 1 is a diagram showing a configuration of an image processing system 1000 in the present embodiment. For the sake of explanation, FIG. 1 also shows the sample paper ORP and paper OUTP described in FIG.

  Referring to FIG. 1, an image processing system 1000 includes a colorimeter 200, an image processing device 500, and an image output device 700.

  The image processing apparatus 500 is a PC (Personal Computer). Note that the image processing apparatus 500 is not limited to a PC, and may be another apparatus.

  The image output device 700 is an MFP. The MFP is a device having a plurality of functions such as a printer, a FAX, and a scanner. The image output apparatus 700 is not limited to the MFP, and may be another apparatus as long as it has a function of printing characters, images, and the like on a recording medium such as paper. Note that an ICC profile 705 described later is stored in a storage unit (not shown) provided in the image output apparatus 700.

  Image processing apparatus 500 performs data communication with each of colorimeter 200 and image output apparatus 700.

(Image processing device)
Next, the image processing apparatus 500 will be described in detail.

  FIG. 2 is a block diagram showing an internal configuration of the image processing apparatus 500. 2 also shows a colorimeter 200, an image output device 700, and a recording medium 555 for explanation. A recording medium 555 stores a program 180 described later. That is, the program 180 is recorded on a medium or the like and distributed as a program product. The recording medium 555 is also distributed as a program product.

  The image processing apparatus 500 includes a display unit 530, a control unit 510, a temporary storage unit 522, and a storage unit 520.

  The display unit 530 has a function of displaying characters, images, and the like. The display unit 530 is a display device using an LCD panel (Liquid Crystal Display Panel). The display unit 530 may be another display device as long as it has a function of displaying characters, images, and the like.

  The storage unit 520 has a function of storing data in a nonvolatile manner. The storage unit 520 is accessed by the control unit 510. The storage unit 520 is a hard disk capable of storing a large amount of data. Storage unit 520 is not limited to a hard disk, and may be a medium (for example, a flash memory) that can hold data in a nonvolatile manner even when power is not supplied. The storage unit 520 stores a program 180, a profile creation program 524, which will be described later, and other various data.

  Control unit 510 has a function of performing various types of processing, arithmetic processing, and the like for each unit in image processing apparatus 500 in accordance with program 180 stored in storage unit 520. Control unit 510 is a CPU (Central Processing Unit). Control unit 510 is not limited to a CPU, and may be another circuit having an arithmetic function.

  Temporary storage unit 522 is accessed as data by control unit 510 and used as a work memory for temporarily storing data. The temporary storage unit 522 is a DRAM (Dynamic Random Access Memory). Note that the temporary storage unit 522 is not limited to a DRAM, and may be another circuit capable of storing data in a volatile manner.

  The image processing apparatus 500 further includes a VDP 532 (Video Display Processor) and a VRAM (Video Random Access Memory) 536.

The VRAM 536 has a function of temporarily storing image data.
Control unit 510 issues a drawing instruction to VDP 532 according to program 180 stored in storage unit 520. The drawing instruction is an instruction for generating an image and causing the display unit 530 to display the image.

  The VDP 532 is connected to the display unit 530. The VDP 532 reads font data, graphic data, and the like from the program 180 in the storage unit 520 in response to a drawing instruction from the control unit 510, and generates an image using the VRAM 536. The VDP 532 reads out the image data stored in the VRAM 536 and causes the display unit 530 to display an image based on the image data.

  The image processing apparatus 500 further includes an input unit 540 and a recording medium access unit 550.

  A mouse 542 and a keyboard 544 are connected to the input unit 540. The user gives an instruction to the image processing apparatus 500 using the mouse 542 or the keyboard 544. An input instruction from the mouse 542 or the keyboard 544 is transmitted to the control unit 510 via the input unit 540. Control unit 510 performs predetermined processing based on an input instruction from input unit 540. Hereinafter, the operation of the mouse 542 or the keyboard 544 by the user is also referred to as an interface operation P.

  The recording medium access unit 550 has a function of reading the program 180 from the recording medium 555 on which the program 180 is recorded. The program 180 stored in the recording medium 555 is read by the recording medium access unit 550 by the installation process of the control unit 510, and the control unit 510 stores the program 180 in the storage unit 520. The installation processing program is stored in advance in the storage unit 520, and the installation processing is performed by the control unit 510 based on the installation processing program.

  Note that the program 180 may not be installed in the storage unit 520. In this case, control unit 510 reads program 180 stored in recording medium 555 via recording medium access unit 550, and performs predetermined processing based on program 180.

  The recording medium 555 is a CD-ROM (Compact Disk Read Only Memory). The recording medium 555 is not limited to a CD-ROM, and other media capable of recording data in a nonvolatile manner, such as Blu-ray Disc (registered trademark), HD-DVD (High-Definition Digital Versatile Disc). ) (Registered trademark), DVD-ROM (Digital Versatile Disk Read Only Memory), SD memory card (registered trademark), or the like.

The image processing apparatus 500 further includes a communication unit 560 and a communication unit 562.
Communication unit 560 exchanges data with control unit 510. The communication unit 560 has a function of a communication interface that performs serial transfer based on the USB (Universal Serial Bus) 2.0 standard. Note that the standard of the communication interface for performing serial transfer is not limited to USB 2.0, and may be another standard.

  The communication unit 560 is connected to each of the colorimeter 200 and the image output device 700 via a USB cable. Therefore, the communication unit 560 can perform data communication with each of the colorimeter 200 and the image output device 700 by wire (USB cable).

  Communication unit 562 exchanges data with control unit 510. The communication unit 562 has a function of performing data communication using a wireless technology based on IEEE 802.11g, which is a wireless LAN standard. The wireless technology is not limited to the technology based on IEEE 802.11g, and may be other wireless technology. Therefore, communication unit 562 can perform data communication with network 70 wirelessly. The network 70 is an external network such as the Internet.

  The communication unit 562 further has a communication interface function using Ethernet (registered trademark). Accordingly, the communication unit 562 can perform data communication with the network 70 via, for example, a LAN cable.

  Therefore, the image processing apparatus 500 in the present embodiment can also download a program from the network 70 via the communication unit 562 and store the program in the storage unit 520. In this case, the downloaded program is the program 180.

  Control unit 510 performs predetermined processing in accordance with a program (program 180) downloaded from network 70. The download program is stored in advance in the storage unit 520, and the download process is performed by the control unit 510 based on the download program.

(Specific color settings)
Next, a process for setting a specific color (hereinafter also referred to as a specific color setting process) will be described. The specific color setting process is performed by the image processing apparatus 500. The specific color setting process is performed when there is an interface operation P for executing the specific color setting program included in the program 180.

  1 is assumed to be installed at a position where the color data of the original specific color ORCL printed on the sample paper ORP can be acquired. As described above, the sample paper ORP is printed with a color based on the color data of the original specific color ORCL.

  FIG. 3 is a flowchart of the specific color setting process. Referring to FIG. 3, in step S110, an initial image display process is performed. In the initial image display process, the control unit 510 generates the following initial image G100 using the VDP 532, and causes the display unit 530 to display the generated initial image G100. And the process of step S110 is complete | finished.

  FIG. 4 is a diagram illustrating an image displayed on the display unit 530. FIG. 4A is a diagram showing an initial image G100 as an example. With reference to FIG. 4A, numerical setting sections G111, G112, G113, G114 and button images BG170, BG180, BG190 are arranged in the initial image G100.

  The numerical value setting unit G111 is an input unit for setting a cyan value by the interface operation P. The numerical value setting unit G112 is an input unit for setting a magenta value by the interface operation P. The numerical value setting unit G113 is an input unit for setting a yellow value by the interface operation P. The numerical value setting unit G114 is an input unit for setting a black value by the interface operation P. In each of the numerical value setting sections G111, G112, G113, and G114, no numerical value is displayed in the initial state.

  The button image BG170 is a button image for performing a printing process by being pressed. The button image BG180 is a button image for registering values input to the numerical value setting units G111, G112, G113, and G114 by being pressed. The button image BG190 is a button image for ending the specific color setting process by being pressed.

Referring to FIG. 3 again, after the process of step S110, the process proceeds to step S111.
In step S111, color data acquisition processing is performed. In the color data acquisition process, control unit 510 transmits a color acquisition instruction for acquiring color data to colorimeter 200.

When the colorimeter 200 receives the color acquisition instruction, the colorimeter 200 acquires color data of the original specific color ORCL printed on the sample paper ORP. Here, it is assumed that the color data acquired by the colorimeter 200 is expressed by L ^* a ^* b ^* values. The color data of the specific color ORCL acquired by the colorimeter 200 is, for example, data indicating lightness L ^* of “83”, saturation a ^* of “−10”, and saturation b ^* of “5”. Suppose there is.

  Then, the colorimeter 200 transmits the acquired color data of the specific color ORCL to the image processing device 5000. Through this process, control unit 510 receives color data of specific color ORCL. Control unit 510 causes storage unit 520 to store the received color data of specific color ORCL. Then, the process of step S112 is performed.

  In step S112, a profile acquisition process is performed. In the profile acquisition process, control unit 510 transmits a profile acquisition request for acquiring ICC profile 705 stored in image output device 700 to image output device 700. The ICC profile 705 includes the following lookup table D100. The look-up table D100 is a data table indicating color characteristics that can be expressed by the image output apparatus 700.

FIG. 5 is a diagram illustrating a look-up table D100 as an example. Referring to FIG. 5, look-up table D100 includes 200 color conversion data as an example. Each of the 200 color conversion data is data in which L ^* a ^* b ^* values and CMYK values are associated with each other. That is, the ICC profile 705 is also a file that associates the CIELAB color space that is device-independent with the color space (CMYK color space) that is expressed by CMYK values that can be reproduced by the image output apparatus 700.

The look-up table D100 does not include color conversion data corresponding to each of all L ^* a ^* b ^* values in the CIELAB color space. Look-up table D100 includes, for example, color conversion data corresponding to each of 200 L ^* a ^* b ^* values corresponding to typical 200 colors. Each of the 200 color conversion data is data located at lattice points in the CIELAB color space, as shown in FIG. 6 below.

FIG. 6 is a diagram for explaining lattice points in the CIELAB color space. Referring to FIG. 6, the grid point is a point formed by dividing each of the L ^* axis, a ^* axis, and b ^* axis into a predetermined number in the CIELAB color space.

  Referring to FIG. 3 again, in the profile acquisition process in step S112, upon receiving the profile acquisition request, image output apparatus 700 transmits ICC profile 705 including lookup table D100 to image processing apparatus 500. With this processing, control unit 510 receives ICC profile 705 including lookup table D100. Then, the control unit 510 stores the received ICC profile 705 in the storage unit 520. Then, the process proceeds to step S113.

In step S113, color data conversion processing is performed. In the color data conversion process, the control unit 510 uses the look-up table D100 included in the ICC profile 705 to express the color data of the specific color ORCL expressed by the L ^* a ^* b ^* values as CMYK values. To color data (hereinafter also referred to as output device color data T). Here, the color data of the specific color ORCL is, for example, data indicating lightness L ^* of “83”, saturation a ^* of “−10”, and saturation b ^* of “5”.

Specifically, when the color conversion data corresponding to the L ^* a ^* b ^* value indicated by the color data of the specific color ORCL is in the lookup table D100, the control unit 510 is indicated by the corresponding color conversion data. The CMYK value is stored in the storage unit 520 as the output device color data T.

On the other hand, when there is no color conversion data corresponding to the L ^* a ^* b ^* value indicated by the color data of the specific color ORCL in the look-up table D100, the control unit 510 displays L ^* a ^* indicated by the color data of the specific color ORCL ^. Using the b ^* value and the lookup table D100, L ^* a ^* b ^* -CMYK interpolation calculation processing for calculating the CMYK value is performed.

Here, the L ^* a ^* b ^* -CMYK interpolation calculation process is a general calculation method disclosed in paragraphs 0008 to 0015 of JP-A-2001-333285, for example. Note that the value of K in CMYK is calculated by an expression similar to the expression for obtaining C described in paragraph 0014 of JP-A-2001-333285. The CMYK value calculated by the above L ^* a ^* b ^* -CMYK interpolation processing is output device color data T. Then, control unit 510 stores output device color data T in storage unit 520.

Here, it is assumed that the color conversion data corresponding to the L ^* a ^* b ^* value indicated by the color data of the specific color ORCL is not in the lookup table D100, and the L ^* a ^* b ^* -CMYK interpolation calculation process has been performed. Assume that the CMYK values indicated by the output device color data T calculated by the L ^* a ^* b ^* -CMYK interpolation calculation process are C = 20, M = 3, Y = 20, and K = 2, for example. Then, the process proceeds to step S114.

  In step S114, output device color data display processing is performed. In the output device color data display process, the control unit 510 uses the VDP 532 as a guideline value for setting the output device color data T obtained by the color data conversion process in step S113 for data of a specific color. And displayed on the display unit 530. By this processing, the following specific color setting image G100A is displayed on the display unit 530. Then, the process of step S114 ends.

  Note that the processing in steps S113 and S114 may not be performed. In this case, the user inputs a value directly to each of the numerical value setting units G111, G112, G113, and G114 by the interface operation P.

  Referring to FIG. 4 again, FIG. 4B is a diagram showing the specific color setting image G100A. Referring to FIG. 4B, the specific color setting image G100A is different from the initial image G100 in that the color display image G105 is further arranged, and each of the numerical value setting units G111, G112, G113, and G114. The CMYK value indicated by the output device color data T is displayed. Other than that, it is the same as the initial image G100, and the detailed description will not be repeated.

  The color display image G105 is an image indicating a color expressed by CMYK values indicated by the output device color data T.

Referring to FIG. 3 again, after the process of step S114, the process proceeds to step S115.
In step S115, control unit 510 determines whether there is printing operation T or not. The print operation T is an interface operation P for pressing the button image BG170. If YES in step S115, the process proceeds to step S116. On the other hand, if NO at step S115, the process proceeds to step S117. Here, assuming that there is a printing operation T, the process proceeds to step S116.

  In step S116, a printing process is performed. In the printing process, control unit 510 transmits output device color data T to image output device 700. And the process of step S116 is complete | finished.

  When receiving the output device color data T, the image output device 700 outputs the paper OUTP on which the color OUTCL is printed based on the received output device color data T.

  The user visually compares the color OUTCL printed on the paper OUTP output from the image output device 700 with the original specific color ORCL printed on the sample paper ORP, and the color OUTCL accurately reproduces the specific color ORCL. Make sure that the color is correct (hereinafter also referred to as the exact reproduction color). If the color OUTCL is not an accurately reproduced color, the user performs a CMYK change operation.

  The CMYK change operation is an interface operation P for changing the CMYK value indicated in each of the numerical value setting units G111, G112, G113, and G114. That is, the CMYK changing operation is also an operation for inputting a CMYK value different from the CMYK values shown in each of the numerical value setting units G111, G112, G113, and G114.

It progresses to step S117 after the process of step S116.
In step S117, control unit 510 determines whether there is a CMYK change operation. If YES in step S117, the process proceeds to step S118. On the other hand, if NO at step S117, the process proceeds to step S120 described later. Here, assuming that there is a CMYK change operation, the process proceeds to step S118. Here, it is assumed that only the value of C is changed from “20” to “19” by the CMYK change operation.

  In step S118, it is determined whether or not the change of the output device color data T is permitted. Specifically, control unit 510 determines whether or not the data change permission flag is on. The data change permission flag is a flag related to the change of the output device color data T. It is assumed that the data change permission flag is stored in the storage unit 520. If YES at step S118, control proceeds to step S119. On the other hand, if NO at step S118, the process proceeds to step S120 described later.

  If the data change permission flag is on, the change of the output device color data T is permitted. On the other hand, if the data change permission flag is OFF, the change of the output device color data T is not permitted. Assume that the data change permission flag is set to ON in the initial state. Therefore, in this case, YES is determined in step S118, and the process proceeds to step S119.

  In step S119, a data update process is performed. In the data update process, the control unit 510 changes the CMYK value of the output device color data T stored in the storage unit 520 to a value changed by the CMYK change operation. Here, it is assumed that the CMYK values of the changed output device color data T are C = 19, M = 3, Y = 20, and K = 2.

  The control unit 510 uses the VDP 532 to change the CMYK values indicated in the numerical value setting units G111, G112, G113, and G114 to the CMYK values of the output device color data T after the change. Further, the control unit 510 uses the VDP 532 to set the color indicated by the color display image G105 as a color expressed by the CMYK value of the output device color data T after the change. Then, the process of step S119 ends.

After the process of step S119, the process proceeds to step S120.
In step S120, control unit 510 determines whether there is a registration operation. The registration operation is an interface operation P for pressing the button image BG180. If YES in step S120, the process proceeds to step S121. On the other hand, if NO at step S120, the process at step S115 is performed again. Here, assuming that there is no registration operation, the process proceeds to step S115.

  When the user performs the above-described CMYK change operation, the user performs the print operation T again. Thereby, it determines with YES in step S115, and progresses to step S116.

  In step S116, the same processing as described above is performed, and thus detailed description will not be repeated. By this processing, the changed output device color data T (C = 19, M = 3, Y = 20, K = 2) is transmitted to the image output device 700.

  When receiving the changed output device color data T, the image output device 700 outputs paper OUTP on which the color OUTCL is printed based on the changed output device color data.

  As described above, the user confirms whether the color OUTCL is a color that accurately reproduces the specific color ORCL (accurate reproduction color).

  When the color OUTCL is not an accurately reproduced color, the user changes the CMYK value again by the CMYK change operation as described above. Thereby, control unit 510 performs the process of step S119 described above again. Then, the user performs the printing operation T again. Thereby, control unit 510 performs the process of step S116 described above again. As a result, the image output device 700 again outputs the paper OUTP on which the color OUTCL is printed based on the changed output device color data. The user repeatedly performs the CMYK changing operation and the printing operation T until the color OUTCL becomes a color that accurately reproduces the specific color ORCL (accurately reproduced color).

  When the color OUTCL is an accurately reproduced color, the user performs the registration operation described above. Thereby, in step S120, it determines with YES and progresses to step S121.

In step S121, a data registration process is performed. In the data registration process, the control unit 510 generates the following specific color data D110 that associates the color data of the specific color ORCL with the output device color data T. As described above, the color data of the specific color ORCL is, for example, data indicating lightness L ^* of “83”, saturation a ^* of “−10”, and saturation b ^* of “5”. The output device color data T is data indicating C = 19, M = 3, Y = 20, and K = 2.

FIG. 7 is a diagram illustrating specific color data D110 as an example.
Referring again to FIG. 3, in the data registration process, an ICC profile 705 in which the generated specific color data D110 is associated with the lookup table D100 is generated. That is, the ICC profile 705 includes specific color data D110 and a lookup table D100. Then, the control unit 510 transmits the generated ICC profile 705 to the image output apparatus 700. And the process of step S121 is complete | finished.

  In the data registration process in step S121 described above, the control unit 510 includes the specific color data D110 in the ICC profile 705. However, instead of including the specific color data D110 in the ICC profile 705, the control unit 510 causes the storage unit 520 of the image processing apparatus 500 to store the specific color data D110 and the ICC profile 705 in association with each other. The specific color data D110 and the ICC profile 705 may be registered in the image processing apparatus 500.

  Upon receiving the ICC profile 705, the image output apparatus 700 replaces the currently stored ICC profile 705 with the received ICC profile 705. By this processing, the image output device 700 stores the ICC profile 705 including the specific color data D110 and the lookup table D100.

It progresses to step S124 after the process of step S121.
In step S124, control unit 510 sets the data change permission flag stored in storage unit 520 to OFF. Then, the process proceeds to step S126.

  In step S126, control unit 510 determines whether or not there is an end operation. The end operation is an interface operation P for pressing the button image BG190. If YES in step S126, the specific color setting process ends. On the other hand, if NO at step S126, the process at step S115 is performed again.

  Here, it is assumed that the user performs a CMYK change operation. In this case, the process proceeds to step S118 by the process of step S117 described above.

  In step S118, since the data change permission flag is off, it is determined as NO and the process proceeds to step S119. That is, once the registration operation is performed, the value of the output device color data T cannot be changed by user input.

  Thus, even if the user mistakenly performs the CMYK change operation after the registration operation is performed, the output device color data T is not changed. Therefore, unintended change of the output device color data T due to a user's erroneous operation can be prevented.

(Re-create lookup table)
Next, a process for recreating a lookup table included in an ICC profile stored in the image output apparatus 700 in order to prevent a decrease in reproducibility of colors output from the image output apparatus 700 will be described. As described above, the lookup table is a data table indicating color characteristics that can be expressed by the image output apparatus 700. Here, it is assumed that the lookup table before being recreated is the lookup table D100.

  The lookup table is re-created when, for example, the image output apparatus 700 performs the printing process a predetermined number of times (for example, 200 times) or more.

  The storage unit 520 of the image processing apparatus 500 stores the profile creation program 524 as described above. The profile creation program 524 is a program for newly creating or re-creating a lookup table.

  The re-creation of the lookup table is performed by a re-creation operation performed on the image processing apparatus 500 by the user. The re-creation operation is an interface operation P for executing the profile creation program 524.

  When there is a re-creation operation, the control unit 510 of the image processing apparatus 500 executes the profile creation program 524 and performs the following LUT re-creation processing based on the profile creation program 524.

  In the LUT re-creation process, first, the control unit 510, for example, issues a patch print instruction for printing a plurality of patches respectively corresponding to 200 CMYK values respectively corresponding to typical 200 colors, to the image output apparatus 700. Send to. Here, the data of the 200 CMYK values are, for example, data in which at least one CMYK value is equally spaced. That is, some of the 200 CMYK values are data having values that increase the C value by a predetermined value (for example, “10”), for example.

  The image output apparatus 700 outputs paper on which 200 patches corresponding to 200 CMYK values are printed in response to the patch printing instruction.

The control unit 510 transmits to the colorimeter 200 a color measurement instruction for measuring the color of 200 patches printed on paper. The colorimeter 200 measures 200 patches printed on paper in accordance with a color measurement instruction, thereby 200 color data (L ^* a ^* b ^* ) respectively corresponding to 200 CMYK values ^. Value). Then, the colorimeter 200 transmits the acquired 200 color data (L ^* a ^* b ^* values) to the image processing apparatus 500. By this processing, control unit 510 acquires 200 color data (L ^* a ^* b ^* values).

The control unit 510 uses the 200 CMYK values and the acquired 200 color data (L ^* a ^* b ^* values) to generate 200 color data (L ^* a ^* b ^* values) in the lookup table D100 of FIG. 200 CMYK values corresponding to L ^* a ^* b ^* values) are performed. The 200 pieces of color data (L ^* a ^* b ^* values) in the lookup table D100 in FIG. 5 are data located at the lattice points in FIG. 6 as described above.

  The arithmetic processing is processing performed based on a general profile creation program. With the above processing, the lookup table D100 becomes the following lookup table D100A.

FIG. 8 is a diagram showing a look-up table D100A as an example. Referring to FIG. 8, look-up table D100A has a different CMYK value corresponding to each of 200 L ^* a ^* b ^* values compared to look-up table D100 of FIG. Other than that, it is the same as lookup table D100, and therefore detailed description will not be repeated.

  In the LUT re-creation process, control unit 510 transmits look-up table D100A to image output device 700.

  When the image output apparatus 700 receives the lookup table D100A, the image output apparatus 700 replaces the lookup table D100 included in the ICC profile 705 with the lookup table D100A. Thereby, the ICC profile 705 includes the specific color data D110 and the lookup table D100A.

  Thus, the LUT re-creation process ends. In this case, the lookup table D100A is a data table indicating color characteristics that can be expressed by the current image output apparatus 700.

(Process when re-creating lookup table)
Next, a process (hereinafter also referred to as “re-creation process”) that is performed when a lookup table indicating color characteristics that can be expressed by the image output apparatus 700 is re-created will be described. The re-creation process is performed by the image processing apparatus 500. The re-creation process is a process performed independently of other processes. Further, it is assumed that the re-creation process is a process that is automatically executed when the image processing apparatus 500 is powered on, for example.

FIG. 9 is a flowchart of the re-creation process.
Referring to FIG. 9, in step S210, it is determined whether or not the lookup table stored in image output apparatus 700 has been changed. Specifically, control unit 510 determines whether or not the look-up table stored in image output apparatus 700 has been changed by the aforementioned LUT re-creation process. As described above, the LUT re-creation process is a process for re-creating a lookup table indicating color characteristics that can be expressed by the image output apparatus 700.

  If YES in step S210, the process proceeds to step S212. On the other hand, if NO at step S210, the process at step S210 is performed again. Here, it is assumed that the look-up table stored in the image output apparatus 700 has been changed by the above-described LUT re-creation process, and the process proceeds to step S212.

  In step S212, profile acquisition processing is performed. In the profile acquisition process, the control unit 510 transmits a profile acquisition request for acquiring the ICC profile 705 currently stored in the image output apparatus 700 to the image output apparatus 700. It is assumed that the ICC profile 705 includes the specific color data D110 in FIG. 7 and the lookup table D100A in FIG.

  Upon receiving the profile acquisition request, the image output device 700 transmits an ICC profile 705 including specific color data D110 and a lookup table D100A to the image processing device 500. With this processing, control unit 510 receives ICC profile 705 including specific color data D110 and lookup table D100A. Then, the control unit 510 stores the received ICC profile 705 in the storage unit 520. Then, the process proceeds to step S213.

In step S213, the control unit 510 selects color conversion data indicating the L ^* a ^* b ^* value indicated by the specific color data D110 in FIG. 7 among the 200 color conversion data indicated by the received lookup table D100A. It is determined whether or not there is. If YES in step S213, the process proceeds to step S214. On the other hand, if NO at step S213, the process proceeds to step S224 described later. Here, assuming that there is color conversion data indicating the L ^* a ^* b ^* value indicated in the specific color data D110, the process proceeds to step S214.

In step S214, data setting processing A is performed. In the data setting process A, the control unit 510 sets the color conversion data indicating the L ^* a ^* b ^* value indicated by the specific color data D110 in FIG. 7 out of the 200 color conversion data indicated by the lookup table D100A. The CMYK value shown is replaced with the CMYK value of the specific color data D110. By this processing, the specific color data D110 becomes the following specific color data D110A.

FIG. 10 is a diagram illustrating specific color data D110A as an example.
Referring to FIG. 9 again, in data setting process A, control unit 510 generates ICC profile 705 in which specific color data D110A is associated with lookup table D100A. That is, the ICC profile 705 includes specific color data D110A and a lookup table D100A. Then, the control unit 510 transmits the generated ICC profile 705 to the image output apparatus 700. Then, the process of step S210 is performed again.

  Upon receiving the ICC profile 705, the image output apparatus 700 replaces the currently stored ICC profile 705 with the received ICC profile 705. With this processing, the image output device 700 stores the ICC profile 705 including the specific color data D110A and the lookup table D100A.

Next, processing when there is no color conversion data indicating the L ^* a ^* b ^* value shown in the specific color data D110 of FIG. 7 among the 200 color conversion data shown in the lookup table D100A will be described. In this case, NO is determined in step S213, and the process proceeds to step S224.

In step S224, a data setting process B is performed. In the data setting process B, the control unit 510 uses the L ^* a ^* b ^* value indicated by the specific color data D110 and the lookup table D100A to calculate the LMY ^* a ^* b ^* − for calculating the CMYK value. CMYK interpolation calculation processing is performed.

Here, the L ^* a ^* b ^* -CMYK interpolation calculation process is a general calculation method disclosed in paragraphs 0008 to 0015 of JP-A-2001-333285, for example. Note that the value of K in CMYK is calculated by an expression similar to the expression for obtaining C described in paragraph 0014 of JP-A-2001-333285.

The control unit 510 replaces the CMYK value calculated by the L ^* a ^* b ^* -CMYK interpolation calculation process with the CMYK value of the specific color data D110 in FIG. By this processing, it is assumed that the specific color data D110 becomes, for example, the specific color data D110A of FIG.

The calculation of the CMYK values is not limited to the L ^* a ^* b ^* -CMYK interpolation calculation process, but may be another calculation method. Another calculation method may be, for example, a triangular pyramid interpolation calculation process. Triangular pyramid interpolation calculation processing includes L ^* a ^* b ^* values indicated by the specific color data D110 and data corresponding to two points in the vicinity of the L ^* a ^* b ^* values indicated by the specific color data D110 in the lookup table D100A. Is used to calculate the CMYK value.

  Then, control unit 510 generates ICC profile 705 in which specific color data D110A is associated with lookup table D100A. That is, the ICC profile 705 includes specific color data D110A and a lookup table D100A. Then, the control unit 510 transmits the generated ICC profile 705 to the image output apparatus 700. Then, the process of step S210 is performed again.

  Upon receiving the ICC profile 705, the image output apparatus 700 replaces the currently stored ICC profile 705 with the received ICC profile 705. With this processing, the image output device 700 stores the ICC profile 705 including the specific color data D110A and the lookup table D100A.

  As described above, in the present embodiment, even if the lookup table indicating the color characteristics that can be expressed by the image output apparatus 700 is re-created (changed), the specific color data corresponding to the lookup table is The color is changed to specific color data (for example, specific color data D110A) based on the changed look-up table (for example, look-up table D100A).

  Therefore, when the image processing apparatus 500 causes the image output apparatus 700 to print a specific color, the image output apparatus 700 performs print processing using the changed specific color data (for example, the specific color data D110A). The specific color can be accurately reproduced. That is, the image processing apparatus 500 has an effect that the image output apparatus 700 can accurately reproduce a specific color. The image processing apparatus 500 performs the various processes described above according to the program 180. That is, the program executed by the image processing apparatus 500 has an effect that the image output apparatus 700 can accurately reproduce a specific color.

  Further, once the user performs a registration operation for storing the specific color data in the image output apparatus 700, the specific color data is automatically changed every time the lookup table is re-created. Therefore, once the user sets the specific color data, it is not necessary to set the specific color data again even if the lookup table is re-created.

  As a result, the image output device 700 can accurately reproduce a specific color without much effort.

  In this embodiment, the ICC profile 705 is managed by the image output apparatus 700. However, the ICC profile 705 may be managed by the image processing apparatus 500.

<Second Embodiment>
In the first embodiment, the processing of the image processing system 1000 in which one image output apparatus 700 is connected to one image processing apparatus 500 has been described. In the present embodiment, processing of an image processing system in which a plurality of image output devices 700 are connected to one image processing device 500 will be described.

(System configuration)
FIG. 11 is a diagram showing a configuration of an image processing system 1000A in the present embodiment. For the sake of explanation, FIG. 11 also shows the sample paper ORP and paper OUTP described in FIG.

  Referring to FIG. 11, image processing system 1000A is different from image processing system 1000 in FIG. 1 in that a plurality of image output devices 700 are included. Other than that, it is similar to the image processing system 1000, and therefore, detailed description will not be repeated.

  Note that the configuration of the image processing apparatus 500 is the same as that described in the first embodiment, and thus detailed description thereof will not be repeated.

(Specific color settings)
The specific color setting is realized by the image processing apparatus 500 performing a process similar to the specific color setting process of FIG. 3 described above on each of the plurality of image output apparatuses 700. Will not repeat. By this processing, the ICC profile 705 including the specific color data and the lookup table is stored in each of the plurality of image output apparatuses 700. Here, it is assumed that the specific color data stored in each of the plurality of image output apparatuses 700 is different data. Assume that the lookup tables stored in each of the plurality of image output apparatuses 700 are different tables.

(Re-create lookup table)
Regarding the re-creation of the lookup table, the same processing as the LUT re-creation processing described in the first embodiment is performed between the image processing apparatus 500 and each of the plurality of image output apparatuses 700. The explanation is not repeated. With this processing, in each of the plurality of image output devices 700, an ICC profile 705 including specific color data and a lookup table recreated by the LUT recreation processing (hereinafter also referred to as a recreated lookup table) is stored. Is done. Here, it is assumed that the specific color data stored in each of the plurality of image output apparatuses 700 is different data. Also, it is assumed that the re-created lookup table stored in each of the plurality of image output apparatuses 700 is a different table.

(Process when re-creating lookup table)
Next, in at least one image output device 700 among the plurality of image output devices 700, processing that is performed when a lookup table indicating color characteristics that can be expressed by the image output device 700 is recreated (hereinafter referred to as “replay”). Will be described. The re-creation process A is performed by the image processing apparatus 500. The re-creation process A is a process performed independently of other processes. Further, it is assumed that the re-creation process A is a process that is automatically executed when the image processing apparatus 500 is powered on, for example.

  FIG. 12 is a flowchart of the re-creation process A. Referring to FIG. 12, the process with the same step number as in FIG. 9 is performed in the same way as the process of FIG. 9 described in the first embodiment, and therefore detailed description will not be repeated.

  In step S210A, it is determined whether or not a lookup table stored in at least one of the plurality of image output devices 700 has been changed.

  Specifically, the control unit 510 determines whether or not a lookup table stored in at least one of the plurality of image output devices 700 has been changed by the above-described LUT re-creation processing. Is done.

  If YES in step S210A, the process proceeds to step S212A. On the other hand, if NO at step S210A, the process at step S210A is performed again. Here, for example, assuming that the lookup table stored in each of the three image output apparatuses 700 is changed by the same process as the LUT re-creation process described above, the process proceeds to step S212. Note that the lookup tables (re-created lookup tables) stored in each of the three image output apparatuses 700 are different tables.

  In this case, the processes of steps S212, S213, S214, and S224 described in FIG. 9 are performed for each of the three image output devices 700. Note that the processing in steps S212, S213, S214, and S224 is the same as that described with reference to FIG. 9, and therefore detailed description will not be repeated.

  By performing the above processing, the specific color data stored in each of the three image output devices 700 is changed to the specific color data corresponding to the re-created lookup table. Note that the changed specific color data stored in each of the three image output apparatuses 700 is different data.

  As described above, in the present embodiment, when the lookup table is re-created in each of the plurality of image output devices 700, the specific color data stored in each of the plurality of image output devices 700 is reproduced. The specific color data corresponding to the created lookup table is changed.

Therefore, even in the image processing system 1000A including one image processing apparatus 500 and a plurality of image output apparatuses 700, the same effect as that of the first embodiment can be obtained. That is, there is an effect that a specific color can be accurately reproduced in each of the plurality of image output apparatuses 700 without much effort.
(Function block diagram)
FIG. 13 is a functional block diagram of control unit 510 in the first and second embodiments. Referring to FIG. 13, control unit 510 includes an acquisition unit 511, a registration unit 512, a determination unit 514, and a change unit 516.

  The acquisition unit 511 acquires a profile that associates a first device-independent color space (CIELAB color space) with a second color space (CMYK color space) that can be reproduced by the image output apparatus. The registration unit 512 specifies the first color data, which is data indicating the specific color in the first color space, and the second color data, which is data indicating the specific color in the second color space, in association with the profile. Register as color data.

  The determination unit 514 determines whether or not the color conversion table indicating the color characteristics of the image output apparatus 700 included in the profile has been changed.

  When the determination unit 514 determines that the color conversion table has been changed, the changing unit 516 changes the second color data of the specific color data based on the changed color conversion table.

  Note that all or part of the acquisition unit 511, the registration unit 512, the determination unit 514, and the change unit 516 included in the control unit 510 may be configured by hardware.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the structure of the image processing system in this Embodiment. It is the block diagram which showed the internal structure of the image processing apparatus. It is a flowchart of a specific color setting process. It is a figure which shows the image displayed on a display part. It is a figure which shows the look-up table as an example. It is a figure for demonstrating the lattice point in CIELAB color space. It is a figure which shows the specific color data as an example. It is a figure which shows the look-up table as an example. It is a flowchart of the process at the time of re-creation. It is a figure which shows the specific color data as an example. It is a figure which shows the structure of the image processing system in this Embodiment. It is a flowchart of the process A at the time of re-creation. It is a functional block diagram of the control part in 1st and 2nd embodiment. It is a figure for demonstrating the process for outputting the color which reproduced the specific color correctly by the conventional method.

Explanation of symbols

  70 network, 180 program, 200 colorimeter, 500 image processing device, 510 control unit, 520 storage unit, 530 display unit, 700 image output device, 1000, 1000A image processing system.

Claims (4)

An acquisition unit that acquires a profile that associates a first color space that is device-independent with a second color space that can be reproduced by the image output apparatus;
First color data, which is data indicating a specific color in the first color space, and second color data, which is data indicating the specific color in the second color space, are associated with the profile, and the specific color Registration means for registering as data;
A color conversion table indicating color characteristics of the image output device included in the profile , wherein the first data in the first color space is associated with the second data in the second color space. Determining means for determining whether or not the table including a plurality of color conversion data has been changed;
An image processing apparatus comprising: a changing unit that changes the second color data of the specific color data based on the changed color conversion table when the determining unit determines that the color conversion table has been changed.   The image processing apparatus according to claim 1, wherein the specific color data registered by the registration unit cannot be changed except by a change by the changing unit. An image processing program executed by the image processing apparatus,
The image processing program includes:
An acquisition step of acquiring a profile associating a first device-independent color space with a second color space that can be reproduced by the image output apparatus;
First color data, which is data indicating a specific color in the first color space, and second color data, which is data indicating the specific color in the second color space, are associated with the profile, and the specific color A registration step to register as data,
A color conversion table indicating color characteristics of the image output device included in the profile , wherein the first data in the first color space is associated with the second data in the second color space. A determination step of determining whether or not the table including a plurality of color conversion data has been changed;
An image processing program comprising: a changing step of changing the second color data of the specific color data based on the changed color conversion table when it is determined that the color conversion table has been changed by the determining step. The image processing program according to claim 3 , wherein the specific color data registered in the registration step cannot be changed except for the change in the change step.

Images