JP2016074110A - Image processing apparatus and image processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform decorative printing emphasizing a decorative part and a non-decorative part.SOLUTION: The image processing device acquires image data and decorative region data that indicates a decorative region of an image that the image data indicates; performs color conversion processing different between a region corresponding to the decorative region and a region not corresponding to the decorative region, of the image data; and outputs color material data in which glossiness is imparted to the region corresponding to the decorative region of color-converted image data.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an image processing apparatus and an image processing method used for image formation using a clear color material.

  In recent years, an ink jet recording apparatus using clear (transparent) ink and an electrophotographic recording apparatus using clear (transparent) toner have been proposed. For example, there is a method of expressing various objects such as a watermark, an eye catch, a security mark, etc. by a decoration provided with clear toner or clear ink. In such decorations, it is preferable that the degree of decoration can be freely selected depending on the user's intention, such as making it conspicuous or not conspicuous.

  Patent Document 1 discloses a technique for forming a region where the glossiness is partially lowered or a region where the glossiness is partially increased with respect to the surrounding glossiness according to a user instruction. According to Patent Document 1, it is possible to make the decorative part stand out or not stand out depending on the glossiness.

JP 2011-150158 A

  However, the difference in glossiness is not the only factor that makes the decorative part stand out or stand out. For example, the color difference is also a factor. Since the apparatus described in Patent Document 1 focuses only on the gloss level, there remains room for the decorative portion to be more noticeable.

  The image processing apparatus according to the present invention includes an acquisition unit that acquires image data, decoration area data indicating a decoration area among images indicated by the image data, an area corresponding to the decoration area of the image data, and the decoration Color conversion means for performing different color conversion processing in an area not corresponding to the area, and output means for outputting color material data in which glossiness is given to an area corresponding to the decoration area in the color-converted image data It is characterized by having.

  According to the present invention, not only a difference in glossiness but also a color difference is generated, so that decorative printing in which the decorative portion and the non-decorative portion are more emphasized is possible.

FIG. 4 is a diagram illustrating image data and decoration area data used in the description of the first embodiment. 1 is a block diagram illustrating a configuration of a print system according to Embodiment 1. FIG. 3 is a block diagram of a decoration process according to Embodiment 1. FIG. 3 is a flowchart of a decoration process according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating a multi-pass printing method of color inks used in the description of Example 1. 6 is a diagram illustrating a clear ink multi-pass printing method used in the description of Embodiment 1. FIG. FIG. 10 is a block diagram illustrating a configuration of a print system according to a second embodiment. 6 is a flowchart of color separation according to Embodiment 2. FIG.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. In addition, the structure shown in the following Examples is only an example, and this invention is not limited to the structure shown in figure.

Example 1
In the first embodiment, an image forming apparatus equipped with clear ink will be described as an example. An example in which clear ink forms an image to be further recorded on an area where a color material is recorded in a predetermined area will be described.

(Decoration area data)
In this embodiment, separately from the image data, decoration area data in which whether or not each pixel is a decoration area is used. FIG. 1A is a diagram illustrating an example of image data, and FIG. 1B is a diagram illustrating an example of decoration area data for the image data in FIG. This decoration area data is 1-bit data indicating whether it is a decoration area. That is, the decoration area data is data in which each pixel has a 1-bit attribute value that defines whether or not it is a decoration area. In the example of FIG. 1B, the decoration area data is data in which the star object in the image data of FIG. 1A is defined as a decoration area and other than the stars are not decoration areas.

(Outline of image processing system)
FIG. 2 is a block diagram illustrating an internal configuration of a host device (PC) 10 and an inkjet image forming apparatus (inkjet recording apparatus) 20 that constitute the image processing system according to the present embodiment.

  The ink jet recording apparatus 20 has four color inks that combine the basic colors of cyan (C), magenta (M), yellow (Y), and black (K). In addition to these four colors, there is also clear ink (Cl), which is a colorless (transparent) ink, and printing is performed with a total of five inks. For this purpose, a recording head 211 for ejecting these five colors of ink is provided.

  Examples of programs that operate on the operating system of the host device 10 include an application 201 and a printer driver. The host device has a CPU, ROM, RAM, HDD, etc. (not shown), and the CPU functions as each functional unit shown in FIG. 2 by executing a program read from the ROM or HDD to the RAM.

  The application 201 executes processing for generating image data to be printed by the printer and processing for generating decoration area data. The decoration area data is generated in response to a predetermined area of the image data being designated by the user via a graphical user interface (GUI), for example. The image data to be printed can be taken into the PC via various media. The PC can take in, for example, JPEG format image data captured by a digital camera using a CF card. Also, for example, TIFF format image data read by a scanner or image data stored in a CD-ROM can be captured. Furthermore, image data on the web can be captured via the Internet. These captured image data are displayed on the monitor of the PC, and are edited and processed via the application 201. For example, RGB image data represented by R, G, B signals of the sRGB standard is generated. . Then, the RGB image data and the decoration area data are transferred to the printer driver in accordance with a printing instruction.

  The printer driver functions as each processing unit of the decoration processing unit 202, the color matching unit 203, the color separation unit 204, the γ correction unit 205, the halftoning unit 206, and the print data generation unit 207, and executes each process.

  The decoration processing unit 202 converts RGB image data based on the decoration area data. The decoration area data and the RGB image data are data input and acquired from the host device. Details will be described later.

  The color matching unit 203 performs color gamut mapping. The color matching unit 203 performs data conversion for converting the 8-bit RGB data output from the decoration processing unit 202 into RGB data in the color gamut of the printer used for printing. At this time, data conversion is performed using a three-dimensional LUT and an interpolation operation for mapping the color gamut reproduced by the R, G, B signals of the sRGB standard into the color gamut reproduced by the ink jet printer. The 8-bit RGB data is data in which each color data of R, G, B is composed of 8 bits.

  The color separation unit 204 performs processing for obtaining color separation data (CMYKCl data) corresponding to a combination of inks that reproduce colors represented by the RGB data, based on the RGB data to which the color gamut is mapped by the color matching unit 203. . This process is performed by using an interpolation operation together with the three-dimensional LUT, as in the color matching. The output is 8 bits for each color, and color material data using a value corresponding to the color material amount of each color material of C, M, Y, K, and Cl is output. At that time, referring to the decoration area data, if the pixel to be processed is a non-decoration area, the CL data is set to 0, and if the pixel to be processed is a decoration area, the CL data is output as 1. By this process, the clear ink is applied to the decoration area, and the clear ink is not applied to the non-decoration area.

  The γ correction unit 205 performs gradation value conversion of each color data of the color separation data obtained by the color separation unit 204. Specifically, by using a one-dimensional LUT corresponding to the gradation characteristics of each color ink of the inkjet printer, conversion is performed so that the color separation data is linearly associated with the gradation characteristics of the inkjet printer. Since the clear ink is transparent, no γ correction is performed on the color material amount of the clear ink.

  The halftoning unit 206 converts the 8-bit data output from the γ correction unit 205 into 4-bit data and outputs it. This 4-bit image data is index data for indicating an arrangement pattern in the dot arrangement patterning process in the ink jet printer. The quantization process used when converting 8-bit data into 4-bit data can be performed by, for example, an error diffusion method or a threshold process using a dither matrix. Further, the C, M, Y, K, and CL signals may be quantized with a correlation.

  In the present specification, “pixel” is a minimum unit that can express gradation, and image processing of multi-bit multi-value data (processing such as color matching, color separation, γ correction, and halftoning). This is the smallest unit of interest. In this connection, the “image data” in the above color matching, color separation, and γ correction processing represents a set of pixels to be processed, and each pixel contains 8-bit gradation values. It is. In addition, the “pixel value” in the halftoning process represents the value of the pixel to be processed, and the pixel value including the 8-bit gradation value includes the 4-bit gradation value. It is converted into a pixel value (index data). In halftoning, one pixel corresponds to a pattern composed of 2 × 4 squares, for example, and each square in the one pixel is defined as an area. This “area” is a minimum unit in which dot on / off is defined.

  Finally, the print data generation unit 207 generates print data obtained by adding print control information to the 4-bit print image data (index data) output from the halftoning unit 206. Note that the processing of the application 201 and the printer driver described above is performed by the CPU according to these programs. At this time, the program is read from the ROM or hard disk and used, and the RAM is used as a work area when executing the processing.

  The inkjet recording apparatus 20 includes a configuration of a dot arrangement patterning processing unit 208, a mask data conversion processing unit 209, a head drive circuit 210, and a recording head 211.

  The dot arrangement patterning processing unit 208 performs dot arrangement for each pixel corresponding to an actual print image according to a dot arrangement pattern corresponding to 4-bit index data (tone value information) that is print image data. In the halftoning described above, the number of levels is reduced from 256-level multi-value density information (8-bit data) to 9-level tone value information (4-bit data). However, recording by the ink jet printer is binary information indicating whether or not to record ink. Accordingly, the dot arrangement patterning processing unit 208 assigns a dot arrangement pattern to each pixel represented by 4-bit data of levels 0 to 8 that is an output value of the halftoning process result, thereby allowing a plurality of pixels within one pixel to be assigned. Define dot on / off for each area. That is, whether or not to form dots in each of a plurality of areas in a pixel is defined, and binary ejection data of “1” or “0” is arranged in each area in one pixel.

  A mask data conversion processing unit 209 performs mask processing on the 1-bit ejection data obtained by the dot arrangement patterning processing unit 208. In other words, ejection data for each scan is generated to complete printing of a scanning area having a predetermined width by the recording head 211 by a plurality of scans. At this time, mask processing is performed so that clear ink is finally discharged. That is, the mask data conversion processing unit 209 generates ejection data in which the clear ink is the outermost surface on the paper surface with respect to other inks. Details of the mask process will be described later.

  The ejection data C, M, Y, and Cl for each scan is sent to the head drive circuit at an appropriate timing, whereby the recording head 211 is driven and each ink is ejected according to the ejection data. Note that the above-described dot arrangement patterning processing unit 208 and mask data conversion processing unit 209 in the ink jet printer use dedicated hardware circuits for them, and are executed under the control of a CPU constituting a control unit (not shown). . Note that these processes may be performed by the CPU according to a program, and the above processes may be executed by, for example, a printer driver in the PC.

  In the description of the halftoning and print data generation, the description has been made on the assumption that the processing is performed by the printer driver installed in the host device, but the present invention is not limited to this. The configuration may be such that halftoning is performed inside the printer. Subsequently, each process according to the present embodiment will be described in more detail.

(Decoration processing)
First, the decoration process will be described. Here, the pixel value of the input image is converted so that the clear ink portion and the non-clear ink portion are more emphasized.

FIG. 3 is a block diagram for explaining a functional configuration of the decoration processing unit 202. A pixel value input unit 301 selects a pixel value of a target pixel to be processed one by one from image data configured by arranging a plurality of pixels, and inputs an input pixel value. The decoration area data input unit 302 selects a pixel at a position corresponding to the target pixel from decoration area data configured by arranging a plurality of pixels, and inputs an attribute value of the pixel. The decoration area determination unit 303 determines whether or not the target pixel being processed is a decoration area based on the attribute value of the pixel of the input decoration area data. For example, a pixel with an attribute value of 0 is determined not to be a decoration area, and a pixel with an attribute value of 1 is determined to be a decoration area. If the target pixel is a decorative ^region, L ^* a * ^{b *} calculation unit 304 calculates the ^L * ^a * ^{b *} values from the input pixel values in the known CIE ^L * ^a * ^{b *} color system L ^* Output to addition processing unit 305. L ^* addition processor 305 of the inputted ^L * ^a * ^{b *} values, by adding a predetermined ^{L *} value in the ^{L *} value indicating the brightness, and calculates a summed ^L * ^a * ^{b *} value And output to the RGB calculator 306. The RGB calculation unit 306 calculates the RGB value of the sRGB standard from the added L ^* a ^* b ^* value. The output unit 307 outputs the RGB values as output image data pixel by pixel to the color matching unit 203. Note that the output unit 307 outputs the pixel value (RGB value) input to the pixel value input unit 301 to the color matching unit 203 when the target pixel is not a decoration region.

  FIG. 4 is a flowchart for explaining the operation of the decoration processing unit 202. The processing shown in FIG. 4 is realized by the CPU executing a program stored in a ROM or HDD (not shown) and read out to the RAM.

  When the process is started, the pixel value input unit 301 inputs the pixel value of the target pixel of the image data in step S401. Next, in step S402, the decoration area data input unit 302 inputs a pixel attribute value corresponding to the target pixel in the decoration area data. In step S403, the decoration area determination unit 303 determines whether or not the target pixel of the image data is a decoration area with reference to the attribute value of the pixel corresponding to the target pixel of the input decoration area data. If it is a decoration area, the process proceeds to step S404, and if it is not a decoration area, the process proceeds to step S407.

^L * ^a * ^{b *} calculation unit 304 a pixel value of the image data input in step S401 from (RGB value) using the following equation to calculate the ^L * ^a * ^{b *} values in step S404.

Here, X ₀ , Y ₀ , and Z ₀ are the tristimulus values (reference white color) of the perfect diffuse reflection surface under standard light. As the standard light, for example, a D50 light source is used.

Next, in step S405, the L ^* addition processing unit 305 performs addition processing on the value of L ^* among the L ^* a ^* b ^* values calculated in step S404 using the following expression.

Here, the addition value ΔL ^* can take an arbitrary value, and is assumed to be a value such as 5, for example, in this embodiment. The larger this value is, the more the color difference is emphasized.

In step S406, the RGB calculation unit 306 calculates the RGB value by substituting the a ^* b ^* value calculated in step S404 and the L ^* value added in step S405 into the following equation.

  In step S407, the output unit 307 outputs the pixel value (RGB value) calculated in step S406 or the pixel value input in S401 if NO in step S403.

  In step S408, it is determined whether or not the processing in steps S401 to S407 has been performed with all pixels as the target pixel. If the process has not been performed for all the pixels, the process returns to step S401. If the process has been performed, the decoration process ends.

Here, an example of increasing the L ^* value indicating brightness has been described, but it is also possible to increase the a ^* b ^* value indicating saturation by the same processing. In that case, in the process of step S405, the value of a * b * is multiplied by k as shown in the following equation.

Here, the proportionality constant k can be an arbitrary value. For example, in this embodiment, it is assumed that the proportionality constant k is 1.05. The color difference is enhanced as the value increases. Furthermore, you may perform the process which raises a brightness and saturation simultaneously. Further, the addition value ΔL ^* and the constant constant k may be specified by the user. By performing the processing as described above, among the image data input in the decoration processing unit 202, image data with increased brightness or saturation is output from the decoration processing unit 202 for the decoration region.

(Mask data conversion processor)
Next, processing of the mask data conversion processing unit 209 in the inkjet recording apparatus 20 will be described. The mask data conversion processing unit 209 converts 1-bit ejection data generated by the dot arrangement patterning processing unit 208 into ejection data (mask data) for each scan.

  It should be noted that the presence / absence of dots for each area in each pixel on the recording medium is determined by processing in the dot arrangement patterning processing unit 208. Therefore, in the first place, if the generated binary ejection data is directly input to the drive circuit of the printhead, it is possible to print a desired image on the print medium. On the other hand, in an ink jet recording apparatus, a multi-pass recording method is employed in order to reduce image quality degradation that may occur due to variations in ink droplet ejection characteristics among individual nozzles, variations in transport accuracy of recording media, and the like. . Therefore, recording by the multipass method in this embodiment will be described.

  FIG. 5 is a diagram for explaining a multi-pass printing method of color ink, and schematically shows a print head and a print pattern. In the color ink, the mask patterns corresponding to the fifth nozzle group are all white and recording is not performed. The patterns recorded by the nozzle groups are complementary to each other. When all the patterns of the first to fourth nozzle groups are overlapped, the recording of the area corresponding to the 4 × 4 area is completed.

  Each pattern shows a process in which an image is completed by repeating scanning. Each time scanning by each nozzle group is completed, the recording medium is conveyed by the width of the nozzle group in the direction of the arrow. Therefore, in a predetermined recording area of the recording medium (an area corresponding to the width of each nozzle group), the first color ink image is completed by four scans. The number of scans required to complete an image of a predetermined recording area is referred to as the pass number. As described above, the formation of the predetermined recording area by a plurality of scans using a plurality of nozzle groups has the effect of reducing image quality degradation that may occur due to variations in individual nozzles and variations in the conveyance accuracy of the recording medium. is there.

  FIG. 6 is a diagram for explaining a multi-pass printing method for clear ink, and schematically shows a print head and a print pattern. The clear ink is recorded by scanning the fifth nozzle group that is not used in the color ink by the mask pattern. Although an example in which clear ink is recorded by the last one scan has been described here, the mask pattern for clear ink is not limited to this. Any mask pattern may be used as long as the clear ink is recorded on the outermost surface of the recording medium. For example, the sixth nozzle group may be a mask pattern in which clear ink is further recorded by a plurality of scans.

  The mask data conversion processing unit 209 takes an AND (logical product) of the 1-bit ejection data generated by the dot arrangement patterning processing unit 208 and the mask pattern of FIG. 5 and the mask pattern of FIG. Each mask data is generated. If the mask data is generated in this manner, the clear ink becomes the uppermost layer recording on the recording medium, so that the clear ink can be applied.

  As described above, according to the present embodiment, not only a difference in glossiness but also a color difference is produced between the decorative portion and the non-decorative portion in the same plane of the output object. Decorative printing with more emphasized parts and non-decorated parts becomes possible.

  In this embodiment, the example in which the decoration processing unit 202 is provided before the color matching unit 203 has been described. However, the decoration processing unit 202 may be provided after the color matching unit 203.

(Example 2)
In the first embodiment, the example in which the image data of the decoration area is corrected has been described. However, the color separation process may be changed between the decoration area and the non-decoration area. Therefore, in the second embodiment, an apparatus that performs color separation using different color separation tables for the decoration area and the non-decoration area will be described. In addition, it demonstrates concisely centering on a different point from Example 1. FIG. Therefore, the same components in the above-described drawings will be described with the same reference numerals.

  FIG. 7 is a block diagram illustrating an internal configuration of a host apparatus (PC) and an inkjet image forming apparatus (inkjet recording apparatus) that configure the print system according to the second embodiment. In the second embodiment, a color separation unit 704 is provided. The color separation unit 704 is configured to be able to refer to the decoration table 712 and the non-decoration table 713. Both the decoration table 712 and the non-decoration table 713 are look-up tables (LUTs) used for color separation processing. The decoration table 712 is a table that is referred to when the target pixel is a pixel in the decoration area, and the non-decoration table 713 is a table that is referred to when the target pixel is a pixel in the non-decoration area. In the second embodiment, the decoration processing unit 202 is not included.

  The color separation unit 704 inputs 8-bit RGB data and decoration area data from the color matching unit 203. First, the color separation unit 704 starts processing using the upper left pixel on the image as a target pixel, and then proceeds while switching the target pixel one pixel at a time in the right direction. When the processing is completed up to the right end of the uppermost end, the target pixel is moved to the left end pixel of the next lower pixel row. Processing operations are advanced in this order, and the processing ends at the lower right pixel on the image.

  FIG. 8 is a diagram illustrating a flowchart of the color separation unit 704 in the present embodiment.

  When the processing is started, in step S801, the color separation unit 704 inputs the pixel value of the target pixel in the image data (RGB data) in which the color gamut mapping is performed by the color matching unit 203. In step S <b> 802, the color separation unit 704 inputs an attribute value of a pixel corresponding to the target pixel in the decoration area data. In step S803, the color separation unit 704 determines whether the target pixel is a decoration region based on the attribute value input in step S802. If it is a decoration area, the process proceeds to step S804, and if it is not a decoration area, the process proceeds to step S805.

In step S804, the color separation unit 704 performs color separation based on the decoration table 712 for the pixel of interest. This color separation is a process of color-separating RGB data, to which color gamut mapping has been performed, into color separation data (CMYKCl data) corresponding to a combination of inks. In step S804, the pixel value of the target pixel input in step S801 is color-separated. At this time, interpolation is performed together using a decoration table 712 corresponding to a combination of inks that reproduces a color whose brightness is higher than the color represented by the RGB pixel value by ΔL ^* value. That is, each grid point of the decoration table 712 is generated so as to reproduce a color that is lighter by ΔL ^* than the color represented by the corresponding grid point of the non-decoration table 713. The output is 8 bits for each color, and a value corresponding to the color material amount of each color material of C, M, Y, K, and Cl is output.

  On the other hand, in step S805, the color separation unit 704 performs color separation based on the non-decoration table 713 for the target pixel. In step S805, unlike step S804, the non-decoration table 713 is used to perform interpolation calculation together. The output is 8 bits for each color, and values corresponding to the color material amounts of the C, M, Y, and K color materials are used.

  In step S806, the color separation unit 704 outputs the pixel value (color material value) for which the color separation amount has been determined in step S804 or step S805. In the non-decoration region, 0 is output as Cl.

  In step S807, the color separation unit 704 determines whether or not the processing in steps S801 to S806 has been performed on all pixels as the target pixel. If the process has not been performed for all the pixels, the process returns to step S801. If the process has been performed, the color separation process ends.

  As described above, in the second embodiment, the decoration table and the non-decoration table are prepared as the tables used for the color separation, so that the difference between the decoration part and the non-decoration part is emphasized during the color separation process. Can be performed.

(Other examples)
In Example 1 and Example 2, as an example in which a color difference occurs between the decorative part and the non-decorative part, an example in which the saturation, brightness, or both of the decorative part is increased has been described. The present invention is not limited to this example as long as a color difference occurs in the decorative portion. Specifically, a process of lowering the saturation, lightness, or both of the decorative portions instead of increasing them may be used. Or you may change the saturation of a non-decoration part, the brightness, or both, without changing the saturation or the brightness of a decoration part. That is, it may be a process of increasing or decreasing the saturation and / or lightness of the non-decoration portion without changing the saturation or lightness of the decoration portion. Even with such processing, a color difference can be generated between the decorative portion and the non-decorative portion, so that decorative printing in which the decorative portion and the non-decorative portion are more emphasized is possible.

  In the second embodiment, an example in which the color difference is generated between the decorative portion and the non-decorative portion in the color separation processing has been described. However, the color difference may be generated in another processing such as halftoning.

  Further, in the first and second embodiments, the method of applying the clear ink as an example of the method of applying the clear ink as described above is described as an example of the method of applying the clear ink in the subsequent pass in the multi-pass method. Any method can be used as long as it can be cleared.

  Further, in Example 1 and Example 2, the process of not applying the clear ink to the non-decorated portion was performed. However, if there is a difference in glossiness between the decorative portion and the non-decorated portion, the non-decorated portion is somewhat The clear ink may be applied. In addition, as an example of a glossiness imparting method for imparting a difference in glossiness, an example using clear ink has been described, but another method that does not use clear ink may be used.

  The image forming apparatus is described as an ink jet apparatus, but is not limited thereto. For example, an electrophotographic printing apparatus using clear toner may be used. Further, although an example in which color conversion processing such as color matching and color separation processing is performed in the host device has been described, color conversion processing may be performed in the image forming apparatus.

  The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

201 Application 202 Decoration Processing Unit 203 Color Matching Unit 204 Color Separation Unit 205 γ Correction Unit 206 Half Toning Unit 207 Print Data Generation Unit

Claims (14)

Acquisition means for acquiring image data and decoration area data indicating a decoration area of the image indicated by the image data;
Color conversion means for performing different color conversion processing between an area corresponding to the decoration area of the image data and an area not corresponding to the decoration area;
An image processing apparatus comprising: output means for outputting color material data in which glossiness is imparted to an area corresponding to the decoration area in the color-converted image data.   The color conversion means performs the color conversion processing so that the lightness of an arbitrary color in an area corresponding to the decoration area is different from the lightness of the arbitrary color in an area not corresponding to the decoration area. Item 8. The image processing apparatus according to Item 1.   The color conversion means performs the color conversion processing so that the lightness of an arbitrary color in an area corresponding to the decoration area is higher than the lightness of the arbitrary color in an area not corresponding to the decoration area. The image processing apparatus according to claim 2.   The color conversion means performs the color conversion processing so that the lightness of an arbitrary color in an area corresponding to the decoration area is lower than the lightness of the arbitrary color in an area not corresponding to the decoration area. The image processing apparatus according to claim 2.   The color conversion unit performs the color conversion processing so that the saturation of an arbitrary color in an area corresponding to the decoration area is different from the saturation of the arbitrary color in an area not corresponding to the decoration area. The image processing apparatus according to any one of claims 1 to 4.   The color conversion means performs the color conversion processing so that the saturation of an arbitrary color in an area corresponding to the decoration area is higher than the saturation of the arbitrary color in an area not corresponding to the decoration area. The image processing apparatus according to claim 5, wherein:   The color conversion means performs the color conversion process so that the saturation of an arbitrary color in an area corresponding to the decoration area is lower than the saturation of the arbitrary color in an area not corresponding to the decoration area. The image processing apparatus according to claim 5, wherein:   8. The color conversion unit according to claim 1, wherein the color conversion unit performs the color conversion process by mapping the image data to a color gamut of a printing unit to which the output unit outputs the color material data. The image processing apparatus according to any one of claims.   8. The color conversion unit according to claim 1, wherein the color conversion unit performs the color conversion process by color-separating the image data into color material data output from the output unit. 9. Image processing device.   The color conversion unit performs the color separation using a decoration table and a non-decoration table prepared in advance, and the lightness or saturation indicated by each grid point of the decoration table corresponds to a grid point corresponding to the non-decoration table. The image processing apparatus according to claim 9, wherein the image processing apparatus is different from lightness or saturation indicated by. A printing apparatus that performs printing using color material data output from the output unit of the image processing apparatus according to any one of claims 1 to 10,
A printing apparatus comprising: a gloss imparting unit that imparts gloss to a region corresponding to the decoration region by overlaying a colorless color material on a colored color material. Acquisition means for acquiring image data and decoration area data indicating a decoration area of the image indicated by the image data;
Color conversion means for performing different color conversion processing between an area corresponding to the decoration area of the image data and an area not corresponding to the decoration area;
An image processing system comprising: glossiness imparting means for imparting glossiness to an area corresponding to the decoration area in the color-converted image data. An acquisition step of acquiring image data and decoration area data indicating a decoration area among images indicated by the image data;
A color conversion step of performing different color conversion processing between an area corresponding to the decoration area of the image data and an area not corresponding to the decoration area;
And an output step of outputting color material data in which glossiness is given to an area corresponding to the decoration area in the color-converted image data. An acquisition step of acquiring image data and decoration area data indicating a decoration area among images indicated by the image data;
A color conversion step of performing different color conversion processing between an area corresponding to the decoration area of the image data and an area not corresponding to the decoration area;
A glossiness imparting step for imparting glossiness to an area corresponding to the decoration area in the color-converted image data.

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