JP2009124526A - Color signal converter, image formation device, adjustment coefficient generator, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color signal converter capable of achieving color adjustment by considering the intention of a user about continuity to other surrounding colors while keeping the result of adjustment adjusting a specified color of an adjustment object to an adjustment color. <P>SOLUTION: A U13 includes: a specified color designation part 31 specifying an input color signal used as an adjustment object by a user; an output destination designation part 32 designating screen output or print output for the specified input color signal and its surrounding color signals; an adjustment color designation part 33 specifying a color after adjustment for the specified color by the user; a list designation part 34 adding a combination of the specified color and the adjustment color to a list; a storage instruction part 35 executing an instruction to store the list in an external storage device; a surrounding color designation part 36 used in specifying a correction content of color other than the specified color; and a generation/storage instruction part 37 instructing storage by generating a profile obtained by combining the content of the list by the list designation part 34 with the correction content by the surrounding color designation part 36. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a color signal conversion apparatus, an image forming apparatus, an adjustment coefficient generation apparatus, and a program.

A color adjustment device capable of performing color adjustment of a color image without generating a so-called pseudo contour and minimizing unnecessary influence on an unintended color even when the degree of adjustment to the adjustment region is large. Proposals have been made (see, for example, Patent Document 1).
The color adjustment apparatus proposed in Patent Document 1 is a designated color recording unit that stores a designated color that serves as an adjustment reference for specifying a guideline on how to perform color adjustment and an adjustment color corresponding to the designated color. And an adjustment color recording unit, and a color space coordinate conversion unit that adjusts an arbitrary color to be adjusted based on the designated color and the adjustment color by coordinate conversion in the color space. If the color to be adjusted is the same color as the specified color, the color is adjusted to the corresponding adjusted color, and even if the color is not the same as the specified color, the color that has received the adjustment standard by the specified color and the adjusted color Adjust to.

JP-A-8-287239

  Here, when adjusting peripheral colors, the user desires to give priority to continuity by allowing color change to a wide adjustment range, or to allow continuity degradation by narrowing the adjustment range. Thus, the user may wish to prioritize the minimization of the color change range.

  The present invention relates to a color signal conversion device and image capable of realizing color adjustment in consideration of a user's intention about continuity with other surrounding colors while maintaining an adjustment result of adjusting a designated color to be adjusted to an adjustment color It is an object to provide a forming apparatus, an adjustment coefficient generating apparatus, and a program.

  According to the first aspect of the present invention, first designation means for designating a designated color of an input color signal and an adjustment color to be adjusted for the designated color, and an influence degree of an adjustment result for adjusting the designated color to the adjustment color are designated. A second designating unit for designating continuity between adjacent input color signals and designating an influence range from the surroundings, and an input color signal other than the input color signal of the designated color according to the adjustment result Correction means for correcting the image, wherein the correction means interacts with the degree of influence by a weight determined according to a distance to the surrounding color signal and an influence range from the surrounding. A color signal conversion apparatus that determines an adjustment coefficient of an input color signal other than an input color signal of a color.

  According to a second aspect of the present invention, the input color signal other than the input color signal of the designated color includes a color adjustment prohibition signal that is not affected by the adjustment result. A color signal converter. The invention described in claim 3 is characterized in that the influence range from the surroundings changes in accordance with a distance from the designated color and / or a distance from the color adjustment prohibition signal. It is a color signal converter described. According to a fourth aspect of the present invention, in the color signal converting apparatus according to the first aspect, the distance to the surrounding color signal is a Euclidean distance on the input color signal.

  According to a fifth aspect of the present invention, a receiving unit that receives an input of a first color signal, and a second color signal that depends on an output device using the predetermined color of the first color signal received by the receiving unit. A conversion unit for converting, and an image forming unit that forms an image based on the second color signal converted by the conversion unit, and the predetermined profile used by the conversion unit includes a specified color to be adjusted. The adjustment coefficient of the first color signal other than the first color signal is generated, and the adjustment coefficient has a weight determined according to the distance to the surrounding first color signal and the influence range from the surroundings. An image forming apparatus obtained by interacting with a degree of influence of an adjustment result of adjusting a designated color to an adjustment color.

  According to a sixth aspect of the present invention, in the input color signal other than the input color signal of the designated color, a color adjustment prohibition signal that is not affected by the adjustment result is included. An image forming apparatus.

  According to a seventh aspect of the present invention, a first designation means for designating a designated color of an input color signal and an adjustment color to be adjusted for the designated color, and an influence degree of an adjustment result for adjusting the designated color to the adjustment color are designated. To specify the continuity between adjacent input color signals and to specify the influence range from the surroundings, the distance to the surrounding color signals, and the influence range from the surroundings. Generating means for generating an adjustment coefficient of an input color signal other than the input color signal of the designated color by causing a weight to interact with the degree of influence.

  The invention according to claim 8 is characterized in that an input color signal other than the input color signal of the designated color includes a color adjustment prohibition signal that is not affected by the adjustment result. It is an adjustment coefficient generator.

  According to the ninth aspect of the present invention, the computer has a function of designating a designated color of an input color signal and an adjustment color to be adjusted for the designated color, and an influence degree of an adjustment result for adjusting the designated color to the adjustment color. Is specified according to the function of specifying the continuity between adjacent input color signals and specifying the influence range from the surroundings, the distance to the surrounding color signals, and the influence range from the surroundings. And a function of generating an adjustment coefficient of an input color signal other than the input color signal of the designated color by causing a weight to interact with the degree of influence.

According to the first aspect, it is possible to realize the color adjustment in consideration of the user's intention about the continuity with other surrounding colors while maintaining the adjustment result of adjusting the designated color to be adjusted to the adjustment color.
According to the second aspect, it is possible to prevent a change to a signal that may be an obstacle due to the influence of the adjustment of the designated color.
According to the third aspect, it is possible to ensure continuity between adjacent input color signals as compared with the case where the present invention is not applied.
According to the fourth aspect, it is possible to specify the range of influence in a color space that can be recognized by the user.
According to the fifth aspect, it is possible to perform color adjustment image formation in consideration of the user's intention regarding continuity with other surrounding colors while maintaining the adjustment result of adjusting the designated color to be adjusted to the adjustment color. It becomes possible.
According to the sixth aspect, it is possible to prevent a change to a signal that may be an obstacle due to the influence of the adjustment of the designated color.
According to the seventh aspect, the adjustment coefficient for realizing the color adjustment in consideration of the user's intention about the continuity with other surrounding colors while maintaining the adjustment result of adjusting the designated color to be adjusted to the adjustment color. Generation is possible.
According to the eighth aspect, it is possible to prevent a change to a signal that may be an obstacle due to the influence of the adjustment of the designated color.
According to the ninth aspect, the adjustment coefficient for realizing the color adjustment in consideration of the user's intention about the continuity with other surrounding colors while maintaining the adjustment result of adjusting the designated color to be adjusted to the adjustment color. Generation is possible.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram illustrating a functional configuration of a color signal conversion apparatus 1 to which the exemplary embodiment is applied. A color signal conversion device 1 shown in FIG. 1 includes a color signal reception unit 11, a color adjustment coefficient generation unit (adjustment coefficient generation device) 12, a color adjustment processing unit 13, a color conversion coefficient storage unit 14, a color conversion processing unit 15, and a color. A signal output unit 16 is provided. Then, the color signal conversion apparatus 1 according to the present embodiment executes a color adjustment process on the input color signal to generate an output color signal.

Here, FIG. 2 is a block diagram showing an internal configuration of the color signal conversion apparatus 1 of the present embodiment. As shown in FIG. 2, when the color signal conversion apparatus 1 executes color adjustment processing, the CPU (correction means) 21 and CPU 21 are examples of arithmetic means that executes digital arithmetic processing according to a predetermined processing program. RAM 22 used as a working memory, ROM 23 as an example of a storage unit for storing processing programs executed by the CPU 21, rewritable and capable of retaining data even when power supply is interrupted and backed up by a battery In addition, a nonvolatile memory 24 as an example of a storage unit such as an SRAM or a flash memory, and an interface unit 25 that controls input / output of signals to / from each unit connected to the color signal conversion device 1 are provided.
Further, the external storage device 26 stores a processing program executed by the color signal conversion device 1, and when the color signal conversion device 1 reads this processing program, the color signal conversion device 1 of the present embodiment. The color signal conversion process is executed.

  That is, a program that realizes the functions of the color signal reception unit 11, the color adjustment coefficient generation unit 12, the color adjustment processing unit 13, the color conversion coefficient storage unit 14, the color conversion processing unit 15, and the color signal output unit 16 described above is externally provided. The data is read from the storage device 26 into the ROM 23 in the color signal conversion device 1. Then, based on the program read into the ROM 23, the CPU 21 performs various processes. As this program, for example, a program stored in a reserved area such as a hard disk or a DVD-ROM as the external storage device 26 is loaded into the ROM 23 and provided. As another providing form, there is a form provided in a state stored in the ROM 23 in advance. Further, when the rewritable ROM 23 such as an EEPROM is provided, there is a form in which only the program is provided and installed in the ROM 23 after the color signal conversion device 1 is assembled. Further, there is a form in which a program is transmitted to the color signal conversion device 1 via a network such as the Internet and installed in the ROM 23 of the color signal conversion device 1.

The color signal reception unit 11 is an example of an image signal reception unit, and a color signal (first color signal) to be processed is a device-dependent color space such as an RGB color space (first color space). Full color RGB signals (256 × 256 × 256) are received.
Generally, in a three-dimensional RGB color space, color coordinate values (R, G, B) are set in a range of R, G, B = 0 to 255, respectively. Therefore, color coordinate points (0,0,0) to (255,0,0) on the R axis, color coordinate points (0,0,0) to (0,255,0) on the G axis, and colors on the B axis The coordinate points (0, 0, 0) to (0, 0, 255) are separated by arbitrary steps (for example, 17 steps). Then, all combinations of the separated color coordinate points are created and used as grid points in the RGB color space. For example, (0,0,0), (0,16,0), (0,0,16),... Are lattice points. Then, using the 17 × 17 × 17 grid point addresses generated by the color adjustment coefficient generation unit 12 and the corresponding grid point data, the color adjustment processing unit 13 interpolates an input signal value (full color RGB signal). The color is adjusted by calculation.

  The color adjustment coefficient generation unit 12 generates a color adjustment coefficient reflecting the user's intention based on information specified by a utility having a UI (User Interface) 3 illustrated in FIG. The generated color adjustment coefficient is sent from the color adjustment coefficient generation unit 12 to the color adjustment processing unit 13.

  The color adjustment processing unit 13 uses the color coordinate values (R, G, B) of the input signal values received by the color signal receiving unit 11 as color coordinate values (R, G, B) according to the color adjustment coefficients generated by the color adjustment coefficient generating unit 12. R ', G', B ').

  The color conversion processing unit 15 is a functional unit that performs color conversion processing for converting an input color space into an output color space based on the color conversion coefficients (color conversion characteristics) stored in the color conversion coefficient storage unit 14. is there. That is, the color conversion processing unit 15 converts, for example, the RGB color space color signal acquired from the color adjustment processing unit 13 into a device-dependent color space (device-dependent color space) such as the YMCK color space. Convert to color signal. Then, the color conversion processing unit 15 transmits the image data represented by the converted color signal to the color signal output unit 16.

  The color signal conversion apparatus 1 according to the present embodiment employs a configuration example in which the color conversion processing unit 15 performs color conversion processing after the color adjustment processing unit 13 processes the color input signal with the color adjustment coefficient. However, a configuration in which the color adjustment processing unit 13 is omitted is also conceivable. That is, the color adjustment coefficient generated by the color adjustment coefficient generation unit 12 is transmitted to the color conversion coefficient storage unit 14, and after the color adjustment coefficient and the color conversion coefficient are synthesized, the color conversion processing unit 15 performs color adjustment and color adjustment. A configuration in which conversions are collectively processed is also conceivable.

FIG. 3 is a diagram illustrating an example of the UI 3 of the designated color adjustment dialog used when the designated color adjustment is performed.
The UI 3 shown in FIG. 3 includes a designated color instruction unit 31 used when the user designates an input color signal (designated color) to be adjusted, an input color signal designated by the designated color instruction unit 31 and its surroundings. An output destination instruction unit 32 that instructs screen output (patch display) or print output (patch printing) by a printer under the driver setting to be adjusted as a rectangular patch output destination for the color signal. The UI 3 also includes an adjustment color instruction unit 33 used when the user specifies an adjusted color (adjustment color) for the specified color, an instruction color by the specified color instruction unit 31, and an adjustment color by the adjustment color instruction unit 33. Used to give an instruction to add or delete a combination of the two to the list, and to give an instruction to save the list in the external storage device 26 (see FIG. 2) by the list instruction unit 34. A storage instruction unit 35. The designated color instruction unit 31 and the adjustment color instruction unit 33 constitute a first designation unit, and the peripheral color instruction unit 36 constitutes a second instruction unit.

  The UI 3 also includes a peripheral color instruction unit 36 that is used when specifying the correction content of a color (peripheral color) other than the specified color, the list content by the list instruction unit 34, and the correction content by the peripheral color instruction unit 36. And a generation / storage instruction unit 37 that generates a combined profile (color adjustment coefficient) and instructs storage.

In the designated color instruction unit 31 and the adjustment color instruction unit 33, a column for directly inputting RGB values, a column (dropper) for acquiring RGB values from patch display on the screen, and the color signal conversion device 1 are prepared in advance. A column (pallet) is provided for acquiring RGB values from the palette color.
The output destination instructing unit 32 is provided with a selection unit for selecting the display value range from small, medium, and large and changing the step size of RGB to be displayed. In addition, the peripheral color instruction unit 36 is configured to be able to specify the continuity and the adjustment range (range of influence from the surroundings) as the correction content for the peripheral color. In this embodiment, as the continuity for the peripheral color (continuity between adjacent input color signals), the degree of strength is selected and specified, and the degree of adjustment is selected as the adjustment range for the peripheral color. Specify.
Input information to the designated color instruction unit 31, output destination instruction unit 32, adjustment color instruction unit 33, list instruction unit 34, storage instruction unit 35, peripheral color instruction unit 36, and generation / storage instruction unit 37 is sent to the CPU 21. Processed.

FIG. 4 is a flowchart showing the specified color adjustment processing procedure in the color adjustment coefficient generating unit 12, and the color adjustment coefficient is generated by such a processing procedure. FIG. 5 is a diagram illustrating an example of a layout when a rectangular patch is output.
In the flowchart shown in FIG. 4, the CPU 21 receives an input color signal (color signal to be adjusted) to be adjusted designated by the designated color instruction unit 31 by the user (step 101). As the designation method, as described above, when the RGB value is directly input, there are a case where the RGB value is obtained by designating a position on the screen, and a case where the RGB value is obtained by selecting from the palette color.

  Thereafter, when the output destination instruction unit 32 recognizes that patch display or patch printing has been designated by the user, the CPU 21 identifies the designated color (input color signal) and its surrounding color (peripheral color signal). Under the conditions, the rectangular patch P shown in FIG. 5 is output (step 102). The specific condition referred to here is, for example, setting of a printer driver to be color adjusted. As for the method for determining the surrounding color signal, the method is determined based on the RGB signal method, the method for determining the color signal after conversion to a color space model such as HSL, and the printer driver setting for color adjustment. There is a method of determining the color reproduction characteristics of the printer.

  The user visually confirms the patch printing (printed matter) of the designated color and its surrounding colors in the case of a predetermined printer driver, selects a patch P that achieves a desired color reproduction, and determines an adjustment color for the designated color. . The determined adjustment color is designated by the user in the adjustment color instruction section 33. When an adjustment color is specified (step 103) and the user then instructs the list addition unit 34 to add a list, the CPU 21 receives a combination of the specified color and the adjustment color (step 104).

  Then, the CPU 21 determines whether or not the adjustment color determination for all the designated colors has been completed (step 105). That is, when the save instruction unit 35 is pressed by the user, the process proceeds to step 106, and when the user determines that color adjustment is necessary for another color and an input is made to the designated color instruction unit 31, step 101 is performed. Return to.

  When the user specifies the continuity and adjustment range for the peripheral color using the peripheral color instruction unit 36, the CPU 21 receives the specification of the continuity and the adjustment range (step 106). When the user presses the generation / saving instruction unit 37, the CPU 21 generates a color adjustment coefficient based on the information input by the user (step 107).

FIG. 6 is a diagram for explaining the processing content of the peripheral color adjustment (adjustment for signals other than the designated color).
As shown in FIG. 6, N designated color adjustment data 41 are input by the user's designation (see step 101 and step 103 in FIG. 4), and any of the N designated colors is on the grid point. If not, the color adjustment coefficient generation unit 12 creates N + α color coordinate values (designated color addresses) in the RGB color space. That is, the color adjustment coefficient generation unit 12 is based on the N designated color adjustment data (combination of designated color and adjustment color) 41 input by the user in Step 101 and Step 103 in FIG. 4 in the RGB color space. N + α designated color addresses (color coordinate values) 43 are created. More specifically, if the specified color is located on a grid point in the RGB color space, α = 0, but if it is not located on the grid point, the value of α is 1, 3 or 7, and N + α The value is 1, 2, 4 or 8.

  Further, the color adjustment coefficient generation unit 12 determines a weight width coefficient (wp) and a continuity coefficient (accw) 44 based on the continuity and adjustment range 42 set by the user in Step 106 of FIG. That is, the color adjustment coefficient generation unit 12 determines the continuity coefficient based on the continuity set by the user, and determines the weight width coefficient based on the adjustment range set by the user.

  Thereafter, the color adjustment coefficient generation unit 12 obtains a determined value 46 for each designated color address 43 using the weight width coefficient and continuity coefficient 44 and the grid point address 45 acquired in advance. Then, the color adjustment coefficient generation unit 12 generates a color adjustment table (color conversion definition table) 48 using the determined value 46 as the peripheral color adjustment data 47.

  The determined value 46 will be further described. If the designated color address 43 is on the grid point address 45, the grid point address 45 is set as the determined value 46. Further, when the designated color address 43 is not on the grid point address 45, for example, regression prediction (linear regression analysis) which is statistical processing is performed to replace the grid point address and use it as a determined value.

  The outline of the regression prediction here will be explained. From the data pair of the actual data of the input signal and the actual data of the corresponding output signal, the output signal that is the predicted value corresponding to an arbitrary input signal that is the predicted value. Is what you want. That is, the relationship between the input color signal and the output color signal is connected by a matrix so as to have a linear relationship including a constant term, and an output predicted value obtained from the actual data of a plurality of input signals using the matrix and a plurality of corresponding output values. The matrix components are determined such that the sum of squares of the values weighted by the predicted value-dependent weighting coefficient to the difference for each signal component from the actual output data of the matrix is determined, and from the input signal that is the predicted value, An output prediction value is obtained using the matrix.

7, 8 and 9 are graphs for explaining examples of peripheral color adjustment. That is, FIG. 7 is a graph showing a case where the designated color itself is adjusted, where the vertical axis represents the weight level and the horizontal axis represents the input signal value. FIG. 8 is a graph showing a case where a point (peripheral color) around the designated color is adjusted. The vertical axis represents the weight level, and the horizontal axis represents the input signal value. FIG. 9 is a graph showing an example of the result of the peripheral color adjustment, where the vertical axis is the output signal value and the horizontal axis is the input signal value.
In the graphs shown in FIGS. 7 and 8, the designated color weight (influence level and influence level) indicated by the diamond points and the distance weight (distance to the surrounding color signal and the influence range from the surroundings) indicated by the solid line. ) And the combined weight illustrated by a broken line. The designated color weight is a value that varies depending on whether each of the input signal values 0 to 256 is a designated color or a color adjustment prohibited color, and the distance weight is a designated color or a color adjustment prohibited color and surrounding points. This value is determined according to the distance. The composite weight is obtained by interacting the designated color weight and the distance weight.
In this way, in this embodiment, since a calculation is made not to how much the adjusted point affects the surroundings but to how much a certain point is affected by the surroundings, when predicting a certain point The above-mentioned various weights are calculated for all other signals.

  The distance by the distance weight is the Euclidean distance on the input color signal. That is, the distance here is not a distance on a device-independent space (for example, Lab space), but is a value calculated in the RGB color space in the present embodiment.

  Further, in the present embodiment, the interaction performed when obtaining the composite weight is a value obtained by multiplying each designated color weight of the input signal values 0 to 256 by the distance weight. Other forms are possible, such as adding distance weights.

The example shown in FIGS. 7 and 8 will be specifically described. In this example, the input signal value 48 and the input signal value 128 are designated as the designated colors. The input signal value 0 and the input signal value 256 are designated as the color adjustment prohibited colors. As described above, the input signal values 0, 48, 128, and 256 designated as the designated color or the color adjustment prohibited color have the weight level set to 5, and the other input signal values have the weight level set to 1. Is set.
More specifically, the weight levels of the input signal values 0, 48, 128, and 256 designated for the designated color or the color adjustment prohibited color are input by the user as the continuity of the peripheral color instruction unit 36 shown in FIG. Set according to the content. With such a weight level, the influence level on the peripheral color according to the adjustment result of the designated color is set. Therefore, in this embodiment, an example in which the weight level of the designated color and the color adjustment prohibited color is set to 5 is shown, and other values may be set.

  In the graph of FIG. 7, the distance weight is based on the input signal value 128, and in the graph of FIG. 8, the distance weight is based on the input signal value 96. At these reference points, the distance weight is 1, and other input signal values are set to values smaller than 1. More specifically, such a distance weight is set according to the content input by the user as the adjustment range of the peripheral color instruction unit 36 shown in FIG. For example, the user specifies whether to increase or decrease the adjustment range, and the distance weight curve changes accordingly.

  In the graph of FIG. 9, by the peripheral color adjustment already described, after the peripheral color adjustment, the designated color adjustment point is designated by the user by the adjustment color instruction unit 33 (see FIG. 3) of UI3 (see FIG. 3). The peripheral color is adjusted in accordance with the content specified by the user by the peripheral color instruction unit 36 (see FIG. 3).

FIG. 10 is a table showing the RGB values before the peripheral color adjustment, the R′G′B ′ values after the peripheral color adjustment, and the weight level. In FIG. 7 to FIG. 9 described above, one (one-dimensional) RGB value is illustrated for convenience of explanation, but specific numerical values are shown in FIG. 10 as examples of RGB values. It looks like the table.
As shown in FIG. 10, the weight level higher than the other signals is set for the signals of the designated color and the color adjustment prohibited color signal. Note that the weight level set in FIG. 10 is an example, and the color that is not changed and the color that is changed before and after the adjustment are controlled by interlocking with the designated color, the number of color adjustment prohibited colors, the adjustment range, and the like. Become.

FIG. 11 is a block diagram showing a configuration of an image forming apparatus 200 equipped with an image processing apparatus 210 that stores a color signal conversion profile (adjustment profile) generated by the color signal conversion apparatus 1 of the present embodiment.
An image forming apparatus 200 shown in FIG. 11 is, for example, a digital color printer, and an image processing apparatus 210 that performs predetermined image processing on image data input from an external device, and the overall operation of the image forming apparatus 200. And a control unit 230 for controlling, and an image forming unit 240 realized by, for example, an electrophotographic printer engine for forming an image on a recording medium based on image data composed of each color component.

The image processing apparatus 210 includes, for example, an input interface 211 that receives input of image data from an external device such as a personal computer (PC) 300, an input buffer 212 that temporarily stores image data received by the input interface 211, a PDL ( And a PDL analysis unit 213 that generates intermediate data by analyzing image data in a page description language (Page Description Language) format. In addition, the image processing apparatus 210 includes a rendering processing unit 214 that develops (renders) the intermediate data generated by the PDL analysis unit 213 into image data for printing (raster image data) expressed in an array of pixels. I have. The image processing apparatus 210 also includes an intermediate buffer 215 that is used as a work area during rendering processing in the rendering processing unit 214, a color processing unit 216 that performs color processing on the rendered image data, and color-processed image data. A screen processing unit 217 that performs screen processing on the image processing apparatus.
The color processing unit 216 of the image processing apparatus 210 stores the color signal conversion profile generated by the color signal conversion apparatus 1 of the present embodiment. The color processing unit 216 performs color processing on the image data rendered by the rendering processing unit 214 based on the stored color signal conversion profile. The image data color-processed by the color processing unit 216 is subjected to predetermined screen processing by the screen processing unit 217 and then formed on a sheet by the image forming unit 240.

FIG. 12 is a block diagram showing a configuration when each configuration of the color signal conversion apparatus 1 of the present embodiment is applied to the image forming apparatus 400 and the personal computer 500. The image forming apparatus 400 and the image processing apparatus 410 shown in FIG. 12 have the same basic configuration as the image forming apparatus 200 and the image processing apparatus 210 in FIG. The description is omitted.
A personal computer 500 shown in FIG. 12 includes a color adjustment coefficient generation unit 12 (see FIG. 1) as a utility, and a color adjustment processing unit 13 (see FIG. 1) as a printer driver. Further, the image processing apparatus 410 of the image forming apparatus 400 illustrated in FIG. 12 includes the color conversion coefficient storage unit 14 and the color conversion processing unit 15 in the color processing unit 416.

  Since the image forming apparatus 400 and the personal computer 500 are configured as described above, image data that has been subjected to color adjustment processing by the personal computer 500 is sent to the image forming apparatus 400. The color processing unit 416 of the image forming apparatus 400 performs color conversion processing.

It is a block diagram explaining the functional structure of the color signal converter with which this Embodiment is applied. It is a block diagram which shows the internal structure of the color signal converter of this Embodiment. It is a figure which shows an example of UI of the designated color adjustment dialog utilized when performing a designated color adjustment. It is a flowchart which shows the process sequence of the designated color adjustment in a color adjustment coefficient production | generation part. It is a figure which shows an example of the layout in the case of outputting a rectangular patch. It is a figure explaining the processing content of a peripheral color adjustment. It is a graph explaining the example of peripheral color adjustment. It is a graph explaining the example of peripheral color adjustment. It is a graph explaining the example of peripheral color adjustment. 7 is a table showing RGB values before peripheral color adjustment, R′G′B ′ values after peripheral color adjustment, and weight levels. 1 is a block diagram illustrating a configuration of an image forming apparatus equipped with an image processing apparatus that stores a color signal conversion profile generated by a color signal conversion apparatus according to the present embodiment. 1 is a block diagram illustrating a configuration when each configuration of a color signal conversion apparatus according to an exemplary embodiment is applied to an image forming apparatus and a personal computer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Color signal conversion apparatus, 11 ... Color signal reception part, 12 ... Color adjustment coefficient production | generation part, 13 ... Color adjustment process part, 14 ... Color conversion coefficient storage part, 15 ... Color conversion process part, 16 ... Color signal output part , 21 ... CPU, 22 ... RAM, 23 ... ROM, 24 ... nonvolatile memory, 25 ... interface unit, 26 ... external storage device, 3 ... UI, 31 ... designated color instruction unit, 32 ... output destination instruction unit, 33 ... Adjustment color instruction section 34 ... List instruction section 35 ... Save instruction section 36 ... Ambient color instruction section 37 ... Generation / storage instruction section 200,400 ... Image forming apparatus 210 ... Image processing apparatus 300,500 ... Personal Computer

Claims (9)

First designation means for designating a designated color of an input color signal and an adjustment color to be adjusted for the designated color;
Second designation means for designating continuity between adjacent input color signals by designating the degree of influence of an adjustment result for adjusting the designated color to the adjustment color, and designating an influence range from the surroundings;
Correction means for correcting an input color signal other than the input color signal of the specified color according to the adjustment result;
Including
The correction means adjusts an input color signal other than the input color signal of the specified color by causing the weight determined according to the distance to the surrounding color signal and the influence range from the surrounding to interact with the degree of influence. A color signal converter characterized by determining the color signal.   2. The color signal conversion apparatus according to claim 1, wherein an input color signal other than the input color signal of the designated color includes a color adjustment prohibition signal that is not affected by the adjustment result.   The color signal conversion apparatus according to claim 2, wherein the range of influence from the surroundings changes in accordance with a distance from the designated color and / or a distance from the color adjustment prohibition signal.   The color signal conversion apparatus according to claim 1, wherein the distance to the surrounding color signal is a Euclidean distance on the input color signal. Receiving means for receiving an input of the first color signal;
Conversion means for converting the first color signal received by the reception means into a second color signal depending on an output device using a predetermined profile;
An image forming unit that forms an image based on the second color signal converted by the conversion unit;
Including
The predetermined profile used by the conversion means is generated with an adjustment coefficient of a first color signal other than the first color signal of a designated color to be color adjusted,
The adjustment coefficient is obtained by interacting the weight determined according to the distance to the surrounding first color signal and the influence range from the surrounding with the degree of influence of the adjustment result for adjusting the designated color to the adjustment color. An image forming apparatus.   6. The image forming apparatus according to claim 5, wherein an input color signal other than the input color signal of the designated color includes a color adjustment prohibition signal that is not affected by the adjustment result. First designation means for designating a designated color of an input color signal and an adjustment color to be adjusted for the designated color;
Second designation means for designating continuity between adjacent input color signals by designating the degree of influence of an adjustment result for adjusting the designated color to the adjustment color, and designating an influence range from the surroundings;
Generation means for generating an adjustment coefficient of an input color signal other than the input color signal of the designated color by causing a weight determined according to a distance to the surrounding color signal and an influence range from the surrounding to interact with the degree of influence When,
An adjustment coefficient generating device including:   8. The adjustment coefficient generation device according to claim 7, wherein the input color signal other than the input color signal of the designated color includes a color adjustment prohibition signal that is not affected by the adjustment result. On the computer,
A function for specifying a specified color of an input color signal and an adjustment color to be adjusted with respect to the specified color;
A function for designating continuity between adjacent input color signals by designating an influence level of an adjustment result for adjusting the designated color to the adjustment color, and designating an influence range from the surroundings;
A function of generating an adjustment coefficient of an input color signal other than the input color signal of the specified color by causing a weight determined according to a distance to the surrounding color signal and an influence range from the surrounding to interact with the degree of influence; ,
A program characterized by realizing.

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