JP6939167B2 - Image processing equipment, image forming equipment and programs - Google Patents

Description

The present invention relates to an image processing apparatus, an image forming apparatus and a program.

Patent Document 1 makes it possible to obtain a natural image by reducing the discomfort caused by a transparent image in a colored image on a watermark-printed screen by selecting a processing condition for color conversion depending on the presence or absence of a transparent image. The image processing apparatus is disclosed.

Patent Document 2 describes an analysis means for performing command analysis of a CMYK version and a transparent toner version, a generation means for generating image data of the CMYK version based on the result of command analysis by the analysis means, and a CMYK version generated by the generation means. Disclosed is a control device including an embedding means for embedding a transparent toner attribute obtained by analyzing a transparent toner plate in an attribute flag attached to each pixel of the image data.

Japanese Unexamined Patent Publication No. 2010-263322 Japanese Unexamined Patent Publication No. 2009-55601

By the way, when a special color is superimposed on a basic color, a color difference may occur depending on which attribute information is applied.
Here, the basic color is a color that is basic in forming an image, and is formed by using a YMC (yellow, magenta, cyan) or YMCK (yellow, magenta, cyan, black) developer as an example. It is the color to be used. The special color is a color formed by using a developer other than the basic color developer, and the developer other than the basic color developer includes development of gold, silver, transparent, white, orange, China red, etc. Contains the agent. The special color includes not only a color using only a special color developer but also a color obtained by adding a basic color developer to a special color developer. Further, the occurrence of a color difference means that an unnatural color difference occurs between the region where the special color and the basic color are overlapped and the region of the basic color.

An object of the present invention is to provide an image processing device, an image forming device, and a program capable of preventing the occurrence of a color step when a special color having different attribute information with respect to a basic color overlaps the front surface.

The present invention according to claim 1 is special when a receiving means for receiving image data including a basic color having attribute information and a special color and the basic color and the special color overlap in the image data received by the receiving means. An image processing apparatus having a determination means for determining which attribute information is applied based on a color type and an image value, and an image processing execution means for executing image processing according to the attribute information determined by the determination means. Is.

The present invention according to claim 2 is the image processing apparatus according to claim 1, wherein the determination means is provided with a threshold value relating to a pixel value of a special color, and further includes an adjustment means for adjusting the threshold value.

The present invention according to claim 3 is the image processing apparatus according to claim 2, further comprising a display means for displaying a color in a region where a basic color and a special color overlap.

The image according to claim 1, wherein the determination means determines which attribute information is applied based on the ratio of the amount of the developer of the special color to the amount of the developer of the basic color. It is a processing device.

According to the fifth aspect of the present invention, the determination means applies the attribute information of the special color when the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is equal to or more than a predetermined threshold value. The image processing apparatus according to claim 4, which is determined.

According to the sixth aspect of the present invention, the determination means applies the attribute information of the basic color when the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is less than a predetermined threshold. The image processing apparatus according to claim 4, which is determined.

According to the seventh aspect of the present invention, the determination means determines that when a transparent color is printed on the foreground as a special color, the attribute information of the basic color is applied regardless of the amount of the developer of the special color. Item 2. The image processing apparatus according to item 1.

The present invention according to claim 8 is the image processing apparatus according to any one of claims 1 to 7, wherein the attribute information is a character or an image, and the image processing executing means adjusts the color of the image.

The present invention according to claim 9 includes an image processing device that processes an image and an image forming device main body that forms an image processed by the image processing device on a recording medium, and the image processing device has attributes. When the receiving means for receiving the image data of the basic color and the special color having information and the basic color and the special color overlap in the image data received by the receiving means, which attribute information is used depending on the type of the special color and the pixel value. Is an image forming apparatus having a determination means for determining whether to apply the image, and an image processing execution means for executing image processing according to the attribute information determined by the determination means.

According to the tenth aspect of the present invention, when the step of receiving the image data of the basic color and the special color having the attribute information and the basic color and the special color overlap in the received image data, the type and the pixel value of the special color are overlapped. This is a program for causing a computer having a step of determining which attribute information to apply and a step of executing image processing according to the determined attribute information.

According to the present invention according to claim 1, 9 or 10, it is possible to prevent the occurrence of a color step due to a mismatch of attribute information when a special color is arranged so as to overlap the front surface of the basic color.

According to the second aspect of the present invention, in addition to the effect of the present invention according to the first aspect, the user can adjust the threshold value when applying the attribute information of the special color.

According to the third aspect of the present invention, in addition to the effect of the present invention according to the second aspect, the threshold value can be adjusted while observing the color of the region where the basic color and the special color overlap.

According to the fourth aspect of the present invention, in addition to the effect of the present invention according to the first aspect, the threshold value when the attribute information of the special color is adopted can be set by internally calculating the threshold value.

According to the present invention according to claim 5 or 6, in addition to the effect of the present invention according to claim 1, the ratio of the amount of the special color developer to the basic color developer is equal to or higher than a predetermined threshold value. It is possible to decide whether to apply the attribute of the basic color or the special color depending on whether or not there is.

According to the seventh aspect of the present invention, in addition to the effect of the present invention according to the first aspect, when a special color is printed in the foreground, the attribute information of the basic color is applied to uniformly generate a color step. Can be prevented.

According to the eighth aspect of the present invention, in addition to the effect of the present invention according to any one of the first to seventh aspects, if it is determined that the attribute of the region where the basic color and the special color overlap is an image, the color is used. Adjustments can be made.

It is a front view which shows the image forming apparatus which concerns on embodiment of this invention. It is the schematic which shows the image forming apparatus main body used in embodiment of this invention. It is a side view which shows the image forming part in the image forming apparatus used in embodiment of this invention. It is a block diagram which shows the circuit example of the server used in embodiment of this invention. It is a functional block diagram explaining the function of the server in embodiment of this invention. In the embodiment of the present invention, it is explanatory drawing which shows the tag generation when the basic color and the special color overlap. In the embodiment of the present invention, it is a flowchart which shows the processing flow when the basic color and the special color overlap. It is a flowchart which shows the processing flow in 1st Embodiment for setting a threshold value. It is a screen view which shows the preview screen for confirmation in embodiment of this invention. It is a flowchart which shows the processing flow in 2nd Embodiment for setting a threshold value.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an image forming apparatus 10 according to an embodiment of the present invention.

The image forming apparatus 10 includes a server 12, an image forming apparatus main body 14, and a post-processing apparatus 16, which are connected via a network.

The server 12 supplies the image data to be image-formed to the image forming apparatus main body 14, and controls the image forming apparatus main body 14 and the post-processing apparatus 16. A display device 17 is connected to the server 12. The display device 17 displays a setting screen by, for example, a liquid crystal display, and data can be input by a touch panel, a keyboard, or the like. Further, the server 12 is an image processing device, which receives image data, processes the received image data, and outputs the processed image data to the image forming device main body 14.

The image forming apparatus main body 14 has a recording medium supply unit 18 and an image forming unit 20.

The recording medium supply unit 18 supplies, for example, cut paper or continuous paper as a recording medium to the image forming unit 20.

The image forming unit 20 has, for example, the structure shown in FIG.
That is, the image forming unit 20 includes an intermediate transfer belt 22. Above the intermediate transfer belt 22, for example, six image forming units 24 are provided. The image forming unit 24 uses a toner selected from gold, silver, transparent, white, orange, China red, and the like as a special color developer in addition to the basic color developers of cyan, magenta, yellow, and black. It is designed to form an image. The special color developer makes it possible to exchange colors by exchanging the image forming unit 24 and the toner accommodating portion (not shown).

As shown in FIG. 3, the image forming unit 24 is, for example, a xerographic method, and includes a photoconductor drum 26, a charging device 28 as a charging means for uniformly charging the surface of the photoconductor drum 26, and a photoconductor. It is composed of a developing device 30 for developing an electrostatic latent image formed on the drum 26 and a cleaning device 32. The photoconductor drum 26 is a cylindrical image holder that holds a toner image (developer image), is uniformly charged by a charging device 28, and is an electrostatic latent image by a laser beam emitted by an optical scanning device 34. Is formed. The electrostatic latent image formed on the photoconductor drum 26 is developed with toner by the developing device 30. A primary transfer roll 36 is provided at a position facing the photosensitive drum 26 with the intermediate transfer belt 22 interposed therebetween. The toner image developed by the developing apparatus 30 is transferred to the intermediate transfer belt 22 by the primary transfer roll 36. The residual toner, paper dust, and the like adhering to the photoconductor drum 26 after the toner image transfer step are removed by the cleaning device 32.

The toner image transferred to the intermediate transfer belt 22 by the image forming unit 24 is secondarily transferred to the recording medium supplied from the recording medium supply unit 18 by the secondary transfer roll 38. The recording medium on which the image is transferred is sent to the fixing unit 40, and the image is fixed by heat and pressure, for example. The recording medium on which the image is fixed in this way is further cooled by the cooling unit 42.

As shown in FIG. 4, the server 12 described above has a CPU 48, a memory 50, a user interface 52, and a communication interface 54, which are connected via a control bus 56.

The CPU 48 executes a predetermined process based on the control program stored in the memory 50. The user interface 52 is connected to the display device 17. The display device 17 displays a preview screen and a setting screen generated from the received image data.

The communication interface 54 receives print data from a personal computer or the like connected to the network and sends the processed image data to the image forming apparatus main body 14.

FIG. 5 is a functional configuration diagram of the server 12 according to the embodiment of the present invention.
Each function may be realized by software, or a part or all of it may be realized by hardware.

The image data reception unit 58 receives a print request including reception print data described in a page description language (Page Description Language, PDL).
The image data to be accepted is not limited to PDL, and may be intermediate data.

The image analysis unit 60 analyzes the image data received by the image data reception unit 58. The analysis includes attribute information of the object (print target). The attribute information includes characters and images, but graphics may be added.

As will be described later, the determination unit 62 determines whether to provide the attribute information of either the basic color or the special color based on the threshold information acquired by the threshold information acquisition unit 64 when the basic color and the special color overlap. do.

The rasterization unit 66 divides the image data into a CMYK version and a special color version and rasterizes the image data. In the rasterization unit 66, a tag of a character or an image is attached to each pixel based on the attribute information determined by the determination unit 62.

In this embodiment, the image processing execution unit 68 does not perform any image processing on the characters, but performs, for example, color adjustment on the image, and the output unit 70 transfers the image to the image forming apparatus main body 14 described above. Output image data.

Further, the image data rasterized by the rasterization unit 66 is displayed on the display device 17 after the conversion unit 72 converts the CMYK version and the special color version into RGB.

FIG. 6 shows a state in which an image should be formed when a special color (gold or transparent) character 76 is formed on the foreground surface of an image 74 formed from CMYK together with a tag (attribute information).

For example, when the gold character 76 is formed in the foreground of the image 74, as shown in FIGS. 6 (a) and 6 (b), the tag of the character 76 is valid and the area of the character 76 is color-adjusted. The character 76 is formed without.

On the other hand, when the transparent character 78 is formed in the foreground of the image 74, the tag of the character in the foreground is invalid as shown in FIGS. 6 (c) and 6 (d), and the area of the character 76 is the image 74. The color is adjusted according to the tag of.

That is, normally, the tag of the character 78 in the foreground is valid, but in FIG. 6C, when the tag of the character 78 is valid, the area of the character 78 is processed as a character and the color is adjusted. The image is formed without. If the region of the character 78 is formed as an image without color adjustment, a color step is generated between the area and the surrounding image 74 after color adjustment. In this embodiment, the tag of the character in the foreground is invalid, and the area of the character 76 is color-adjusted according to the tag of the image 74, so that no color difference occurs.

For example, when a special color other than 0 is placed in the foreground on a pixel whose basic color CMYK ≠ (0,0,0,0), an example is as follows (the amount of developer (pixels) for each color in parentheses). (Corresponding to the value and concentration) is shown as 0 to 100%. 100% is the maximum amount of developer that can be supplied).

Example 1: Transparent color developer 0-100%
In this case, since the transparent color developer is colorless and transparent, it is used as the attribute information of the basic color regardless of the density.

Example 2: Gold developer 1%
In this case, since the appearance is the basic color itself, the attribute information of the basic color is left.

Example 3: Gold developer XX%
In this case, since gold is XX% or more that is more noticeable than the basic color in appearance, it is rewritten to the attribute information of gold.

Example 4: Silver developer YY%
Similarly, in this case as well, since silver is YY% or more that is more conspicuous than the basic color in appearance, it is rewritten to the attribute information of silver.

FIG. 7 is a flowchart showing a processing flow when the basic color and the special color overlap.
First, in step S10, it is determined whether or not the attribute information (character / image) of the overlapping portion of the basic color CMYK data and the frontmost special color developer data is different.

If it is determined in step S10 that the attribute information does not differ (is the same), the process proceeds to step S12, and the attribute information of the frontmost special color developer data is applied. On the other hand, if it is determined in step S10 that the attribute information is different, the process proceeds to step S14.

In step S14, it is determined whether or not the color of the special color developer is other than transparent. If it is determined in step S14 that the color of the special color developer is not other than transparent (transparent), the process proceeds to step S16 and the CMYK attribute information is applied.

If it is determined in step S14 that the color of the special color developer is other than transparent, the process proceeds to step S18 to determine whether the pixel value (developer amount) of the special color developer is larger than the threshold value. .. If it is determined in step S18 that the value is not greater than the threshold value (less than the threshold value), the process proceeds to step S16, and the CMYK attribute information is applied.

If it is determined in step S18 that it is larger than the threshold value (or greater than or equal to the threshold value), the process proceeds to step S12, and the attribute information of the frontmost special color developer data is applied. When the process of step S12 or step S16 is completed, the process proceeds to the next step S20, color adjustment is performed according to the attribute information to be applied, output is performed, and the process is completed.

Next, the setting of the threshold value described above will be described.
FIG. 8 is a flowchart showing a processing flow in the first embodiment for setting a threshold value.

First, in step S22, it is determined whether or not the attribute information (character / image) of the overlapping portion of the basic color CMYK data and the frontmost special color developer data is different.

If it is determined in step S22 that the attribute information does not differ (is the same), the process proceeds to step S24, and the attribute information of the frontmost special color developer data is applied. On the other hand, if it is determined in step S22 that the attribute information is different, the process proceeds to step S26.

In step S26, it is determined whether or not the color of the special color developer is other than transparent. If it is determined in step S26 that the color of the special color developer is not other than transparent (transparent), the process proceeds to step S28 and the CMYK attribute information is applied.

If it is determined in step S26 that the color of the special color developer is other than transparent, the process proceeds to step S30, and the overlapping portion of the CMYK data and the frontmost special color developer data is displayed on the preview screen of the display device 17. Display it so that it can be confirmed by the user.

FIG. 9 shows a preview screen 80 for confirmation.
The preview screen 80 includes a pixel value display unit 82, a threshold value display unit 84, and a target image display unit 86.

The pixel value display unit 82 displays pixel values of CMYK and special colors. For the special color, the pixel values of the front and back are displayed. Further, the pixel values of CMYK and the special color are displayed before and after the adjustment, respectively.

The threshold value display unit 84 displays the threshold value X for giving priority to the attribute information of the frontmost special color developer. In this embodiment, the threshold value X is displayed as the pixel value of the special color developer, but it may be displayed as a ratio to the total amount of CMYK. As an initial value, this threshold value is set to 0 so that the attribute information of the foremost special color developer is prioritized.

When the overlapping portion between the CMYK and the special color in the foreground is designated by the target image display unit 86, for example, with a mouse, the pixel value is displayed on the pixel value display unit 82.

Returning to FIG. 8, with the preview screen displayed in step S30, in the next step S32, it is determined whether or not the user wants to emphasize the tint of the frontmost special color developer. If the user wants to emphasize the tint of the frontmost special color developer, the process proceeds to step S34, and the pixel value of the displayed overlapping portion of the special color developer is set lower than the pixel value. On the other hand, if it is determined in step S32 that the user does not want to emphasize the tint of the frontmost special color developer, the process proceeds to step S36, and the pixel value of the special color developer in the overlapping portion displayed is used. Also set high.

In the next step S38, it is determined whether or not the pixel value of the special color developer data is larger than the threshold value. If it is determined in step S38 that the value is not greater than the threshold value (less than the threshold value), the process proceeds to step S28 and the CMYK attribute information is applied.

If it is determined in step S36 that it is larger than the threshold value (or greater than or equal to the threshold value), the process proceeds to step S24, and the attribute information of the frontmost special color developer data is applied. When the process of step S24 or step S28 is completed, the process proceeds to the next step S40, color adjustment is performed according to the attribute information to be applied, output is performed, and the process is completed.

FIG. 10 is a flowchart showing a processing flow in the second embodiment for setting the threshold value.

First, in step S42, it is determined whether or not the attribute information (character / image) of the overlapping portion of the basic color CMYK data and the frontmost special color developer data is different.

If it is determined in step S42 that the attribute information does not differ (is the same), the process proceeds to step S44, and the attribute information of the frontmost special color developer data is applied. On the other hand, if it is determined in step S42 that the attribute information is different, the process proceeds to step S46.

In step S46, it is determined whether or not the color of the special color developer is other than transparent. If it is determined in step S46 that the color of the special color developer is not other than transparent (transparent), the process proceeds to step S48 and the CMYK attribute information is applied.

If it is determined in step S46 that the color of the special color developer is other than transparent, the process proceeds to step S50, and the total amount of the developer of the CMYK data and the frontmost special color developer data is calculated.

In the next step S52, it is determined whether or not the total amount of toner in the special color developer data is larger than the total amount of toner in the CMYK data. If it is determined in step S52 that the total amount of the developer of the special color developer data is larger (or more) than the total amount of the developer of the CMYK data, the process proceeds to step S44 and the attribute information of the frontmost special color developer data is applied. do. On the other hand, if it is determined that the total toner amount of the special color developer data is not (less than) larger than the total toner amount of the CMYK data, the process proceeds to step S44, and the attribute information of CMYK is applied.

Specifically, the processes of steps S50 and S52 are performed as follows.
The amount of the developer is a for C, b for M, c for Y, d for K, and x for the special color ST.
If the result of the following inequality is true, the foreground attribute information is applied, and if it is false, the attribute information of CMYK data is applied.
P × (a + b + c + d) <x × 4 ... (1)
The optimum value of P is determined by verification.
As Example 1, a = 40, b = 80, c = 90, Y = 75, x = 85.
Here, when P = 1.1 is substituted into the equation (1), 313.5 <340.0, and the inequality of the equation (1) is true. Therefore, the attribute information of the special color data is prioritized.
Further, as Example 2, a = 65, b = 80, c = 90, Y = 75, x = 85.
Here, when P = 1.1 is also substituted into the equation (1), 341.0 <340.0, and the inequality in the equation (1) is false. Therefore, the attribute information of the CMYK data is prioritized.

When the process of step S44 or S48 is completed, the process proceeds to step S54, and the color is adjusted according to the attribute information to be applied and output.

In addition to the optimum setting, P may provide a priority mode in which CMYK data has priority and a special color priority mode in which special color data has priority.
Further, the value of P may be changed or corrected depending on the type of special color developer used such as gold, silver, transparent, white, orange, and China red.

In the above embodiment, the case of printing using the xerography technique has been described, but it can also be applied to other printing techniques, for example, an inkjet technique.

10 Image forming device 12 Server 14 Image forming device main body 17 Display device 48 CPU
50 Memory 52 User interface 58 Image data reception unit 60 Image data analysis unit 62 Decision unit 64 Threshold information acquisition unit 68 Image processing execution unit 74 Image 76,78 characters 80 Preview screen 82 Pixel value display unit 84 Threshold display unit 86 Target image display Department

Claims (10)

A reception means for accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Image processing execution means that executes image processing according to attribute information,
In the image data received by the receiving means, when there is a superposed area in which the basic color area and the special color area overlap, there is a determining means for determining which attribute information is applied in the superposed area. death,
The determination means is special in the superimposition region when the attribute information of the basic color in the superimposition region and the attribute information of the special color are different and the pixel value of the special color is equal to or more than a predetermined threshold value. Decide to apply the color attribute information,
When the attribute information of the basic color in the superposed area and the attribute information of the special color are different and the pixel value of the special color is less than a predetermined threshold, the attribute information of the basic color is used in the superposed area. Decide to apply,
Image processing device. A reception means for accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Image processing execution means that executes image processing according to attribute information,
In the image data received by the receiving means, when there is a superposed area in which the basic color area and the special color area overlap, there is a determining means for determining which attribute information is applied in the superposed area. death,
The determination means is a case where the attribute information of the basic color in the superimposed region and the attribute information of the special color are different, and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is equal to or higher than a predetermined threshold value. In the case of, it is decided to apply the attribute information of the special color in the superimposed area, and
When the attribute information of the basic color in the superimposed region and the attribute information of the special color are different and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is less than a predetermined threshold, the above. Decide to apply the basic color attribute information in the superimposed area,
Image processing device. It said determining means, the image processing apparatus according to claim 1, further comprising adjusting means for adjusting a threshold related to the pixel value of the special color. The image processing apparatus according to claim 3, further comprising a display means for displaying a color in an area where a basic color and a special color overlap. The image processing apparatus according to claim 1, wherein the determination means determines to apply the attribute information of the basic color regardless of the pixel value of the special color when the transparent color is printed on the foreground as the special color. The image processing apparatus according to claim 2, wherein the determination means determines to apply the attribute information of the basic color regardless of the amount of the developer of the special color when the transparent color is printed on the foreground as the special color. An image processing device that processes images and
It has an image forming apparatus main body for forming an image processed by the image processing apparatus on a recording medium, and has an image forming apparatus main body.
The image processing device is
A reception means for accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Image processing execution means that executes image processing according to attribute information,
In the image data received by the receiving means, when there is a superposed area in which the basic color area and the special color area overlap, there is a determining means for determining which attribute information is applied in the superposed area. death,
The determination means is special in the superimposition region when the attribute information of the basic color in the superimposition region and the attribute information of the special color are different and the pixel value of the special color is equal to or more than a predetermined threshold value. Decide to apply the color attribute information,
When the attribute information of the basic color in the superposed area and the attribute information of the special color are different and the pixel value of the special color is less than a predetermined threshold, the attribute information of the basic color is used in the superposed area. Decide to apply,
Image forming device. An image processing device that processes images and
It has an image forming apparatus main body for forming an image processed by the image processing apparatus on a recording medium, and has an image forming apparatus main body.
A reception means for accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Image processing execution means that executes image processing according to attribute information,
In the image data received by the receiving means, when there is a superposed area in which the basic color area and the special color area overlap, there is a determining means for determining which attribute information is applied in the superposed area. death,
The determination means is a case where the attribute information of the basic color in the superimposed region and the attribute information of the special color are different, and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is equal to or higher than a predetermined threshold value. In the case of, it is decided to apply the attribute information of the special color in the superimposed area, and
When the attribute information of the basic color in the superimposed region and the attribute information of the special color are different and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is less than a predetermined threshold, the above. Decide to apply the basic color attribute information in the superimposed area,
Image processing device. A step of accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Steps to execute image processing according to attribute information,
In the received image data, when there is a superposed region in which the basic color region and the special color region overlap, there is a step of determining which attribute information is applied in the superposed region.
When the attribute information of the basic color in the superposed area and the attribute information of the special color are different and the pixel value of the special color is equal to or more than a predetermined threshold value, the attribute information of the special color is used in the superposed area. Decided to apply,
When the attribute information of the basic color in the superposed area and the attribute information of the special color are different and the pixel value of the special color is less than a predetermined threshold, the attribute information of the basic color is used in the superposed area. Decide to apply,
A program that lets a computer run. A step of accepting image data including basic colors and special colors having attribute information which is information indicating whether the image is an image or a character,
Steps to execute image processing according to attribute information,
In the received image data, when there is a superposed region in which the basic color region and the special color region overlap, there is a step of determining which attribute information is applied in the superposed region.
When the attribute information of the basic color in the superimposed region and the attribute information of the special color are different and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is equal to or more than a predetermined threshold value, the above Decided to apply special color attribute information in the superimposed area,
When the attribute information of the basic color in the superimposed region and the attribute information of the special color are different and the ratio of the amount of the developer of the special color to the amount of the developer of the basic color is less than a predetermined threshold, the above. Decide to apply the basic color attribute information in the superimposed area,
A program that lets a computer run.

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