JP4622880B2 - Color chart evaluation system, color chart printing apparatus, color chart colorimetry apparatus, color chart evaluation method, and color chart evaluation program - Google Patents

Description

The present invention is a color chart evaluation system, a color chart printing apparatus, a color chart color measurement device, color chart evaluation method, and a color chart evaluation program.

Conventionally, as this kind of color chart evaluation system, color patches corresponding to the attributes of the color chart (image input device) are formed on the color chart, and the color patches are color-determined to measure the color. Is known (see, for example, Patent Document 1, paragraph 0101).
According to this configuration, it is possible to determine the attributes of the color chart to be measured without manually inputting the attribute information of the color chart, so that the work can be simplified and the target image can be obtained. It was possible to prevent erroneous recognition of the input device.
JP 2001-177725 A

However, since the color of the color patch can vary greatly depending on the media on which the color chart is to be printed and the printing conditions, determining the attribute based on the color of the color patch may result in the determination of an incorrect attribute. there were. In order to prevent such misidentification, it is conceivable to increase the color difference of the color patch for specifying the attribute, but in that case, the types of color patches that can be used for specifying the attribute are reduced. . Therefore, there is a problem that the amount of information that can be specified by the combination of color patches cannot be increased, and when a large amount of information is to be specified, a large number of color patches for specifying attributes must be provided.
The present invention has been made in view of the above problems, fewer color patch number without errors can be discriminated attributes of the color chart color chart evaluation system, a color chart printing apparatus, a color chart color measurement device, color chart An object is to provide an evaluation method and a color chart evaluation program.

In order to achieve the above object, in the present invention, a color chart evaluation system includes a color chart printing apparatus and a color chart colorimetry apparatus. The color chart printing apparatus forms a color chart including a plurality of color patches with colors in a predetermined area on a recording medium. The color chart colorimetry apparatus evaluates the color chart by measuring the color patch of the color chart.

  The color chart printing apparatus includes color evaluation color patch forming means, and the color evaluation color patch forming means forms color evaluation color patches at a plurality of addresses on the recording medium. The color patch with the sample color is referred to as a color patch for color evaluation. The attribute specifying color patch forming means selects a specific address corresponding to the attribute of the color chart from the plurality of addresses where the color patch for color evaluation is formed in the color chart. Further, the attribute specifying color patch forming means forms an attribute specifying color patch which is the color patch of the same color as the color evaluation color patch formed at the specific address at a predetermined location on the recording medium. . In other words, the attribute specifying color patch having the same color as any of the color evaluation color patches is formed at a predetermined position of the color chart. The address (specific address) of the color evaluation color patch having the same color as the attribute specifying color patch corresponds to the attribute of the color chart.

  The color chart colorimetric device includes specific address acquisition means, and the specific address acquisition means measures the color of the attribute specifying color patch and the color evaluation color patch. Then, the address where the color patch for color evaluation having the same color as the attribute specifying color patch is located is searched, and the searched address is acquired as the specific address. Further, the attribute acquisition unit acquires the attribute of the color chart based on the acquired specific address. On the other hand, the color evaluation means evaluates the color measurement result of the color evaluation color patch.

  With this configuration, the color chart colorimetric device can be made to recognize the attribute of the color chart by the address of the color evaluation color patch having the same color as the attribute specifying color patch. Therefore, in the color chart colorimetry apparatus, the color evaluation color patch can be evaluated according to the attribute of the color chart. Although the absolute color of the attribute specifying color patch varies greatly depending on the recording medium on which the color chart is printed or the printing conditions, the color evaluation color patch having the same color as that of the attribute specifying color patch. The address does not fluctuate.

  That is, even if the absolute color of the attribute specifying color patch changes, the color of the color evaluation color patch printed so as to be the same color as the attribute specifying color patch also changes. Therefore, the color matching relationship between the two is not impaired by the recording medium on which the color chart is printed or the printing conditions. Therefore, the specific address acquired by the specific address acquisition means is not erroneously acquired, and the attribute of the color chart acquired based on the specific address can also be accurately acquired. In addition, since the absolute color of the attribute specifying color patch is not a problem, a sample color patch is separately formed in order to define the color of the attribute specifying color patch in order to prevent erroneous determination. This is unnecessary, and the required area of the color chart can be reduced.

  Note that the attributes of the color chart may be anything. For example, the printing condition of the color chart may be specified as an attribute based on the specific address acquired by the specific address acquisition unit. More specifically, the type of the recording medium, the printing resolution, the scanning direction of the print head, the machine information of the color chart printing apparatus, and the like may be specified as attributes.

  As an example of the attribute of the color chart, in the invention according to claim 2, the specific address unique to each color chart is selected. Thereby, the attribute acquired based on the specific address acquired by the specific address acquisition means can also be unique to each color chart. Therefore, even when a plurality of the color charts are printed, each color chart can be identified by the color chart colorimetric device. That is, the attribute itself acquired by the attribute acquisition unit may not have a meaning such as a printing condition. For example, a unique and randomly assigned ID number or the like for each color chart may be obtained as an attribute. If such an ID number is obtained as an attribute at the stage of color measurement, the color charts can be managed without being confused.

  In the invention according to claim 3, the color chart printing apparatus is provided with condition data generating means, and the condition data generating means specifies the printing conditions when each color chart is printed, and the specific specification specific to each color chart. Condition data associated with an address is generated. That is, when printing the color chart, the printing condition is acquired and the printing condition is associated with the specific address specific to the color chart. On the other hand, in the color chart colorimetric apparatus, the attribute acquisition unit acquires the condition data. Then, the printing condition corresponding to the specific address acquired by the address acquisition unit with reference to the condition data is acquired as an attribute of the color chart. In this way, even if the printing conditions are not directly recorded on the color chart, the printing conditions of the color chart can be acquired as attributes by measuring the color chart.

  Of course, the printing conditions may be directly recorded on the color chart. As a specific example, in the invention according to claim 4, the address of the color patch for color evaluation on the recording medium prints the color chart. Are associated with each printing condition. For example, the address and the printing condition are associated in advance so that the address at the upper left corner corresponds to the print resolution 1440 dpi × 1440 dpi, or the address at the upper right corner corresponds to the print resolution 720 dpi × 720 dpi. Yes. Then, the attribute specifying color patch forming unit acquires a printing condition for printing the color chart, and selects the specific address corresponding to the printing condition. For example, when the color chart is printed at 720 dpi × 720 dpi, the address in the upper right corner is selected as the specific address, and the attribute specifying color having the same color as the color evaluation color patch in the upper right corner address is selected. A patch will be formed. By doing so, it is possible to describe the printing conditions when the color chart is printed on the color chart.

  As an example of a configuration corresponding to claim 4, in the invention according to claim 5, in the color chart colorimetry device, the printing condition corresponding to the specific address acquired by the specific address acquisition unit is the color chart of the color chart. Get as an attribute. That is, the attribute acquisition unit acquires the specific address acquisition unit by referring to the correspondence relationship between the address of the color patch for color evaluation on the recording medium and each printing condition when printing the color chart. The printing conditions corresponding to the specific address can be acquired. When applied to the above-described example, if the specific address of the color evaluation color patch that is the same color as the attribute specifying color patch is the address in the upper left corner, the print resolution corresponding to the address is 1440 dpi × 1440 dpi. Is acquired as an attribute.

  By the way, the number of formation of the attribute specifying color patches is not particularly limited, and as a preferred example when a plurality of the attribute specifying color patches are formed, in the invention according to claim 6, the attribute specifying color patch is used. A plurality of the attribute specifying color patches are formed by the patch forming means. The attribute acquisition unit acquires the attributes of the color chart according to the order of the specific addresses according to the arrangement of the plurality of color patches for specifying attributes on the recording medium. That is, when a plurality of attribute specifying color patches are formed, the corresponding specific addresses can be obtained for each. Further, the attributes are acquired by arranging the specific addresses corresponding to the attribute specifying color patches in the order corresponding to the arrangement of the attribute specifying color patches on the recording medium. For example, characters are associated with each specific address, and characters at each specific address corresponding to each attribute specifying color patch are arranged in an order corresponding to the arrangement of the attribute specifying color patches on the recording medium. In addition, a sentence meaning printing conditions or the like may be configured. In this way, all attributes can be recorded in the color chart.

The technical idea relating to the color chart evaluation system described above can also be realized in individual devices constituting the color chart evaluation system. Therefore, the invention may be specified as a color chart printing apparatus and the invention may be specified as a color chart colorimetry apparatus. The technical idea relating to the color chart evaluation system described above can also be embodied in a color chart used in the color chart evaluation system, and the invention may be specified as a color chart. Furthermore, the technical idea concerning the above-described color chart evaluation system can also be grasped as an invention of a method for realizing the technical idea, and has the same operations and effects as described above.

Further, it can be realized by a color chart evaluation program that executes processing according to the above method . In addition, the idea of the invention is that the apparatus, method, and program according to the present invention may be implemented independently, or may be implemented together with other apparatuses, methods, and programs while being incorporated in a certain device. Is not limited to this, and includes various aspects, and can be changed as appropriate.

  Further, it can be provided as a recording medium on which the program of the present invention is recorded. The recording medium for this program may be a magnetic recording medium, a magneto-optical recording medium, or any recording medium that will be developed in the future. In addition, the duplication stages such as the primary duplication product and the secondary duplication product are equivalent without any question. Further, even when a part is software and a part is realized by hardware, the idea of the invention is not completely different, and a part is stored on a recording medium and is appropriately changed as necessary. It may be in the form of being read. In addition, not all functions are necessarily realized by a single program, but may be realized by a plurality of programs. In this case, what is necessary is just to make each function implement | achieve in a some computer.

Embodiments of the present invention will be described in the following order.
(1) Configuration of color chart evaluation system:
(2) Color chart printing process:
(3) Color chart evaluation process:
(4) Application examples:
(5) Modification:

(1) Configuration of color chart evaluation system:
FIG. 1 schematically shows a color chart evaluation system according to the present invention. In the figure, a client (CL) computer 10 and a plurality of printers 40, 40, 40... Constituting a color chart printing apparatus are connected to each other. On the other hand, a master (MS) computer 70 and a colorimeter 50 that constitute a color chart colorimetric apparatus are connected to each other. In the present embodiment, the color reproducibility of the plurality of printers 40 is an object of evaluation, and a color chart 60 for color chart evaluation is printed from each printer 40. Then, each color chart 60 printed is measured by the colorimeter 50, the obtained color values are taken into the computer 70, and a predetermined evaluation is performed to create correction data 90. The correction data 90 is stored in, for example, a CD-R. And the correction data 90 memorize | stored in CD-R is input into CL computer 10, and the correction | amendment with respect to each of several printers 40, 40, 40 ... is performed.

  FIG. 2 conceptually shows the hardware configuration and software configuration of the CL computer 10 and the printer 40 according to the present embodiment. The CL computer 10 includes a CPU (not shown) serving as the center of arithmetic processing, a ROM, a RAM, and the like as storage media, and executes a predetermined program using peripheral devices such as the HDD 15. An operation input device such as a keyboard 31 and a mouse 32 is connected to the computer 10 via a serial I / O 19a, and a display 33 is also connected via a video board (not shown). A printer 40a is connected via the USB I / O 19b. For the sake of simplicity, only the printer 40a among the printers 40 connected to the computer 10 is shown in FIG. A CD-ROM drive 34 capable of reading the correction data 90 stored in the CD-R is also connected to the USB I / O 19b.

  The printer 40a is provided with a mechanism in which ink cartridges filled with a plurality of colors of ink can be attached and detached for each color, and CMYK (cyan, magenta, yellow, black) ink cartridges are mounted on this mechanism. The printer 40a can combine these ink colors to form a large number of colors, thereby forming a color image such as the color chart 60 on the print medium. The printer 40a in the present embodiment is an ink jet printer, but the present invention can be applied to various printers such as a laser method in addition to the ink jet method.

  Furthermore, a configuration using four colored inks of CMYK is not essential, and various configurations such as a configuration using six colors of CMYKLcLm (light cyan, light magenta) and seven colors of CMYKLcLmDY (dark yellow) can be adopted. is there. In the computer 10, a printer driver (PRTDRV) 21, an input device driver (DRV) 22, and a display driver (DRV) 23 are incorporated in the OS 20. The display DRV 23 is a driver that controls display of a print target image, a printer property screen, and the like on the display 33, and the input device DRV 22 receives code signals from the keyboard 31 and mouse 32 input via the serial I / O 19a. A driver that receives and receives a predetermined input operation.

  The PRTDRV 21 can perform printing by performing a predetermined process on an image for which a print instruction has been made using an application program (not shown) or a predetermined color chart image. In the computer 10, printer drivers corresponding to the respective printers 40 connected in principle are installed. However, the PRTDRV 21 corresponding to the printer 40a will be described as a representative in FIG.

  The PRTDRV 21 includes a print condition setting module 21a, a print condition acquisition module 21b, an attribute specifying color patch formation module 21c, a condition data generation module 21d, an image composition module 21e, a color conversion module 21f, a halftone processing module 21g, and a print data generation module. 21h and an LUT correction module 21i. The attribute specifying color patch forming module 21c includes a specific address selecting module 21c1 and an attribute specifying area data generating module 21c2. The LUT correction module 21 i is provided for correcting a color conversion LUT 14 described later, and the other modules 21 a to 21 h are provided for printing the color chart 60. When an operation for instructing printing of the color chart 60 is performed with the keyboard 31 or the mouse 32, the PRTDRV 21 is driven. Then, the PRTDRV 21 sends data to the display DRV 23 to display a user interface (UI) screen described later on the display 33.

  The printing condition setting module 21a accepts the printing conditions of the color chart 60 input according to this UI screen. Further, when a printing instruction is accepted on the UI screen, the printing conditions are determined. The confirmed printing conditions are input to the printing condition acquisition module 21b. The printing condition acquisition module 21b acquires the printing time from the timer 20a provided in the OS 20, and also acquires the printing conditions such as the machine number unique to each printer 40 from the printer 40a via the USB I / O 19b.

  In the attribute specifying color patch forming module 21c including the specific address selecting module 21c1 and the attribute specifying area data generating module 21c2, processing for generating the attribute specifying area data 18 which is image data for forming the attribute specifying color patch is performed. Done. Each time the color chart 60 is instructed to print, the specific address selection module 21c1 generates a six-digit random number as an ID number, and selects three specific addresses corresponding to the ID number. Since the ID number is a random number, it is set uniquely for each color chart 60. In selecting three specific addresses, the color evaluation area data 17 stored in the HDD 15 is referred to.

  FIG. 3 shows the color evaluation area data 17. In the figure, color evaluation area data 17 is prepared as image data in which pixels represented by RGB gradation values are arranged, and a plurality of rectangular color evaluation color patches C are distributed in a matrix. It is arranged at a predetermined address. It should be noted that the color is constant inside each color patch C, and the RGB gradation values of the pixels belonging to the inside of each color patch are constant. In the present embodiment, a color evaluation color patch C of 10 rows × 10 columns is prepared, and 100 sample colors can be formed. Each color evaluation color patch C is associated with address numbers 00, 01, 02... 98, 99 defined by a combination of the number of rows and the number of columns. By performing printing based on the color evaluation area data 17, color evaluation color patches C having a plurality of sample colors can be listed at respective addresses on the recording medium. The sample colors are determined so as to cover the entire color gamut reproducible by the printer 40 without any deviation. Further, the color patches C of similar colors may be arranged so as to form a gradation. Note that the color evaluation area data 17 may be any data that specifies which address (address number) the color evaluation color patch C of which RGB value is arranged in, such as vector data or It may be table data.

  After generating the 6-digit ID number, the specific address selection module 21c1 acquires the color evaluation area data 17, and selects three address numbers constituting the 6-digit ID number by arranging them in order. For example, when the ID number is generated as “012345”, 01 corresponding to the first and second digits of the first address number is selected, and 23 corresponding to the third and fourth digits of the second address number. Is selected, and 45 corresponding to the fifth and sixth digits of the third address number is selected. The address corresponding to the address number selected as described above corresponds to the specific address of the present invention. Next, the attribute specific area data generation module 21c2 acquires the RGB value of the color patch C for color evaluation at a specific address. Here, since three specific addresses are selected, three sets of RGB values are acquired. In the above-described example, the RGB values of the color evaluation color patch C located at the address numbers 01, 23, and 45 are acquired. The attribute specific area data generation module 21c2 then sets the attribute specific area data 18 as image data including an attribute specifying color patch having the same RGB value as the RGB value of the color evaluation color patch corresponding to the selected specific address. Is generated.

  FIG. 4 shows the attribute specific area data 18. Similarly to the color evaluation area data 17, the attribute specifying area data 18 is also generated as image data in which pixels represented by RGB gradation values are arranged. In the attribute specifying area data 18, three attribute specifying color patches Z are formed and arranged adjacent to each other in the width direction. The leftmost attribute specifying color patch Z1 has the same RGB value as the color evaluation color patch C formed at the address number 01, and the central attribute specifying color patch Z2 is the color evaluation formed at the address number 23. The RGB value is the same as that of the color patch C, and the rightmost attribute specifying color patch Z3 has the same RGB value as the color patch C for color evaluation formed at the address number 45. That is, by printing based on the attribute specifying area data 18, an attribute specifying color patch Z having the same color as the color evaluation color patch C located at the specific address can be formed on the color chart.

  As described above, the attribute specifying color patch forming module 21c selects three specific addresses corresponding to the ID number of the color chart 60 to be printed from the addresses where the color evaluation color patch C is formed. . Then, attribute specifying area data 18 is formed so that an attribute specifying color patch Z of the same color as the color evaluation color patch C formed at the specified address can be formed at a predetermined location on the printing paper. Since the specific address is selected according to the random number as described above, unique attribute specific area data 18 is formed for each color chart. The attribute specifying area data 18 may be data specifying what RGB value attribute specifying color patch Z is arranged at which position, and may be vector data or table data specifying such information. There may be.

  The condition data generation module 21d acquires the printing conditions such as the machine number acquired by the printing condition acquisition module 21b, and also acquires the ID number randomly generated by the specific address selection module 21c1. Then, condition data 16 in which the input printing condition is associated with the ID number is generated and stored in the HDD 15.

  FIG. 5 shows the condition data 16. As shown in the figure, the condition data 16 is stored as table data in which printing conditions and ID numbers are stored in association with each other. The image composition module 21e acquires the color evaluation area data 17 and the attribute specifying area data 18 and synthesizes them. If both the color evaluation area data 17 and the attribute specifying area data 18 are RGB color system image data as in this embodiment, they can be combined by connecting the image data as they are. If the color evaluation area data 17 and the attribute specifying area data 18 are both vector data, they are drawn after being drawn. The image data that has been combined is referred to as color chart data.

  FIG. 6 shows the color chart data. In the figure, an attribute specifying area A2 in which attribute specifying color patches Z1 to Z3 are arranged in the width direction is formed above the color evaluation area A1 in which the color evaluation color patches C are arranged in a matrix. The color evaluation area data 17 is invariant image data, and each color evaluation color patch C is always arranged at a fixed position. On the other hand, the attribute specifying area data 18 is different image data for each color chart, but only the RGB values of the attribute specifying color patch Z are changed, and the positions of the attribute specifying color patches Z1 to Z3 are changed. There is no. Therefore, the position of the color patch C for color evaluation and the color patch Z for attribute specification is always constant in the combined color chart data.

  The color conversion module 21 f acquires color chart data formed by combining the color evaluation area data 17 and the attribute specifying area data 18. The color conversion module 21f is a module that converts a color system indicating the color of each pixel, and is a color ink that the printer 40a mounts the RGB color system of color chart data with reference to the color conversion LUT 14 recorded in the HDD 15 as appropriate. Is converted to the CMYK color system. The color conversion LUT 14 is a table that expresses colors by the RGB color system and the CMYK color system, associates the two, and describes the correspondence between a plurality of colors. Therefore, regarding an arbitrary color expressed in the RGB color system, if an RGB color that is a surrounding color and is defined in the color conversion LUT 14 is referred to, the CMYK color system corresponding to the arbitrary color is obtained by interpolation calculation. Color can be calculated and color system conversion can be performed.

  When the color conversion system 21f converts the color system and obtains CMYK data, the halftone processing module 21g determines the gradation value of each pixel expressed in the CMYK color system to eject / not discharge ink in each pixel. The discharge is converted into the specified halftone image data. That is, ejection / non-ejection of ink droplets is determined for each pixel in the printer 40a. Needless to say, not only ink droplet ejection / non-ejection but also the amount of ejected ink can be controlled stepwise to determine the size of the ejected ink droplet.

  The print data generation module 21h receives the halftone image data, rearranges them in the order used by the printer 40a, and generates print data in units of data used in one main scan. The print data is sequentially output to the printer 40a via the USB I / O 19b. When all the data necessary for forming an image is transferred to the printer 40a, the color chart data is recorded on the recording medium by the printer 40a. Is formed, and a color chart is created.

  The PRTDRV 21 includes an LUT correction module 21i. In the LUT correction module 21 i, correction data 90 created by the MS computer 70 is input via the CD-ROM drive 34, and the color conversion LUT 14 is corrected based on the correction data 90. At that time, the print condition to be printed is compared with the print condition attached to the correction data 90, and if the two match, the correction data 90 is used to correct the color conversion LUT14. Do. Thereby, for example, it is possible to prevent the color conversion LUT 14 from being corrected by the correction data 90 created for different aircraft, and the color reproducibility to be deteriorated. Since the color conversion LUT 14 is a table that defines CMYK data, it is possible to correct the color that is finally reproduced on the recording medium by correcting the color conversion LUT 14. The correction data 90 may be input by a medium other than the CD-R, or may be input from a server on the Internet.

FIG. 7 conceptually shows the hardware configuration and software configuration of the MS computer 70 and the colorimeter 50 according to the present embodiment. The MS computer 70 has substantially the same configuration as the CL computer 10, but is connected to the colorimeter 50 via the USB I / O 79b. The colorimeter 50 irradiates the color chart 60 with a light source having a known spectral energy, detects the reflected light by detecting reflected light, and detects the color value thereof, for example, L ^* a ^* b ^* value or XYZ. A value can be output. In the present embodiment, the colorimeter 50 is driven by the colorimeter driver 82, and the color values (L ^* a ^* b ^* values) of the color patches in the color chart 60 printed by the printers 40 and the relevant values. The coordinates of the color patch on the color chart 60 are acquired.

  The colorimeter 50 can adopt various methods. As in the present embodiment, the color chart 60 scans the color chart 60 to measure the moving distance of the color sensor 60, and the color patch C, You may employ | adopt what acquires the coordinate on the color chart 60 of Z. Further, by moving the color chart 60 on the XY stage with respect to the fixed colorimetric sensor and measuring the moving distance of the XY stage, the coordinates of the color patches C and Z on the color chart 60 are acquired. You may do. Furthermore, an area sensor or a line sensor that captures the color chart 60 and generates image data may be used to acquire the coordinates of the color patches C and Z on the color chart 60 based on the position in the image data. May be.

An evaluation program 81 for evaluating the color chart 60 is incorporated in the MS computer 70. The evaluation program 81 includes a correction data creation module 81a, a color evaluation module 81b, an attribute acquisition module 81c, and a printing condition acquisition module 81d. Has been. The attribute acquisition module 81c acquires the coordinates on the color chart 60 of the color patches C and Z described in the array data 75b by referring to the array data 75b. The array data 75b is data describing the correspondence between the color patches C (address numbers) and Z and the coordinates of the color patches C and Z on the color chart 60. As described above, since the positions of the color patches C and Z in the color chart data are constant, the array data 75b can be created in advance. The attribute acquisition module 81c scans the coordinates of the color patches C and Z in the color chart 60 of the color patches C and Z, and sequentially acquires L ^* a ^* b ^* values. As a result, L ^* a ^* b ^* values can be obtained for the color patches C and Z.

Further, the attribute acquisition module 81c searches for a color evaluation color patch C that has a color matching relationship with the attribute specifying color patch Z. Since the L ^* a ^* b ^* values are obtained for the color patches C and Z as described above, the L ^* a ^* b ^* values substantially equivalent to the L ^* a ^* b ^* values of the color patch Z for attribute specification The color evaluation color patch C may be searched. For example, the color difference ΔE between the attribute specifying color patch Z and the color evaluation color patch C is calculated, and when the color difference ΔE is below a predetermined threshold, the attribute specifying color patch Z and the color evaluation color patch C It may be determined that the same color relationship is established. Then, the address number of the color evaluation color patch C for which the color matching relationship is established is acquired from the array data 75b. The threshold value of the color difference ΔE may be a value that is smaller than the color difference ΔE between the color patches C for color evaluation of the closest colors and larger than the variation of the printer reproduction color in the entire printing paper. .0. In the above-described example, the attribute specifying color patches Z1 to Z3 are formed, and a corresponding two-digit address number can be obtained for each. The three address numbers obtained here are rearranged into 6-digit numbers according to the arrangement order of the corresponding attribute specifying color patches Z1 to Z3.

  In the example described above, the address number of the color patch for color evaluation with the same color as the rightmost attribute specifying color patch Z1 is 01, and the address number of the color patch for color evaluation with the same color as the central attribute specifying color patch Z2. Since the color chart 60 is printed so that the address number of the color patch for color evaluation of the same color as the leftmost attribute specifying color patch Z1 is 45, these address numbers are assigned the corresponding attribute specification. When the color patches Z1 to Z3 are arranged in the order of arrangement, the ID number of the color chart 60 “012345” can be restored.

  The printing condition acquisition module 81d acquires the ID number of the color chart 60 and the condition data 75c previously generated by the CL computer 10. Then, the printing condition corresponding to the ID number of the color chart 60 is acquired by referring to the condition data 75c. The condition data 75c here is the same as the condition data 16 generated by the condition data generation module 21d of the CL computer 10, and is prepared by receiving the condition data 16 from the CL computer 10 in advance. Accordingly, in the condition data 75c as well, as shown in FIG. 5, the correspondence between the ID number representing the attribute of the color chart 60 and the printing condition is defined. Conditions can be acquired. The condition data 16 is generated every time the color chart 60 is created, and a plurality of condition data 16 is stored in the HDD 75 as the condition data 75c in the MS computer 70. However, since the ID number is unique to each color chart 60, the condition data 75c that stores the printing conditions corresponding to the ID number acquired by the attribute acquisition module 81c from the plurality of condition data 75c is searched without confusion. can do.

The color evaluation module 81b compares the color measurement result (L ^* a ^* b ^* value) obtained by measuring the color patch C for color evaluation with a reference value 75a stored in the HDD 75 in advance. At this time, the reference value 75a that is referred to according to the printing condition acquired by the printing condition acquisition module 81d is selected. The comparison result between the color value obtained by measuring the color patch C for color evaluation and the reference value 75a is input to the correction data generation module 81a, and correction data 90 is generated if correction is necessary. Printing conditions are also input to the correction data creation module 81a, and correction data 90 corresponding to the printing conditions is created. The correction data 90 is output to the CDR drive 71 via the USB I / O 79 b and recorded on the CD-R by the CDR drive 71. The correction data 90 recorded on the CD-R is input to the CL computer 10 and used for correcting the color conversion LUT 14.

(2) Color chart printing process:
FIG. 8 shows the flow of the color chart printing process performed by the CL computer 10. In the figure, when a printing instruction for the color chart 60 is received by the input device DRV 22, the printing condition acquisition module 21b acquires the printing conditions in step S100. The printing condition acquisition module 21b can input data from the printing condition setting module 21a, the timer 20a, and the USB / IO 19b, and acquires predetermined printing conditions from each information source.

  FIG. 9 shows a list of print condition items acquired in step S100. In the figure, a printing machine, a printing model, printing date, printing paper, printing resolution, and color tone are acquired as printing conditions. The printing machine is acquired from the printer 40a via the USB / IO 19b, the printing date and time is acquired from the timer 20a, and the printing paper, the printing resolution, and the color tone are acquired from the printing condition acquisition module 21b. The print condition acquisition module 21b receives input of each print condition in advance using the UI screen.

  FIG. 10 shows an example of a UI screen. In the figure, a color chart printing execution button is provided at the bottom of the UI screen. When the button is clicked, the color chart printing process after step S100 is executed and the printing conditions set at this time are confirmed. To do. The determined printing condition is acquired by the printing condition acquisition module 21b. When the printing condition is acquired, the specific address selection module 21c1 generates an ID number composed of a 6-digit random number in step S110. In step S120, the print condition acquired in step S100 and the ID number generated in step S110 are input to the condition data generation module 21d, and the condition data generation module 21d displays the print condition and ID as shown in FIG. Condition data 16 associated with the number is generated and stored in the HDD 15.

  In step S130, the attribute specific area data generation module 21c2 acquires the ID number, and the 6-digit ID number is sequentially divided into 2 digits-2 digits-2 digits, and each is used as a specific address. When the ID number is “012345”, it is divided into “01”, “23”, and “45”, and each is selected as a specific address. In step S140, the RGB value of the color evaluation color patch C located at the address selected as the specific address is obtained by referring to the color evaluation area data 17. Here, since the specific addresses are selected as 01, “23” and “45”, three sets of pixels belonging to the area corresponding to the addresses “01”, “23” and “45” in the color evaluation area data 17 are selected. RGB values are acquired.

  In step S150, the attribute specific area data generation module 21c2 generates the attribute specific area data 18 having the attribute specifying color patches Z1 to Z3 having the three sets of RGB values acquired in step S140. In the attribute specifying area data 18, as shown in FIG. 4, three attribute specifying color patches Z1 to Z3 are provided, and the RGB values of the pixels belonging to the leftmost attribute specifying color patch Z1 are ID numbers. Are equal to the RGB value of the color evaluation color patch C located at the specific address “01” corresponding to the first and second digits. The RGB value of the pixel belonging to the central attribute specifying color patch Z2 is equal to the RGB value of the color evaluation color patch C located at the specific address “23” corresponding to the third and fourth digits of the ID number, The RGB values of the pixels belonging to the right attribute specifying color patch Z3 are equal to the RGB values of the color evaluation color patch C located at the specific address “45” corresponding to the fifth and sixth digits of the ID number.

  When the attribute specific area data 18 is generated, in step S160, the color evaluation area data 17 and the attribute specific area data 18 are combined to generate color chart data as shown in FIG. The synthesized color chart data is output to each module after the color conversion module 21f in step S170, and the color chart 60 based on the image data is printed by the printer 40a. The color chart 60 is obtained by reproducing the color chart data shown in FIG. 6 as it is on the printing paper, and has the same configuration as the color chart data. Therefore, illustration of the color chart 60 is omitted.

(3) Color chart evaluation process:
FIG. 11 shows the flow of color chart evaluation processing performed by the MS computer 70. In step S200, the attribute acquisition module 81c reads the array data 75b and acquires the positions of the attribute specifying color patches Z1 to Z3 stored in the array data 75b. Then, the colorimetric sensor is scanned at the positions of the attribute specifying color patches Z1 to Z3, and the color specifying of the attribute specifying color patches Z1 to Z3 is sequentially performed. Three sets of L ^* a ^* b ^* values obtained by measuring colors of the attribute specifying color patches Z1 to Z3 are stored in the RAM or the HDD 75. In step S210, the attribute acquisition module 81c reads the array data 75b and acquires the position of the color evaluation color patch C stored in the array data 75b. Then, the color measurement sensor is scanned at the position of the color evaluation color patch C, and the color evaluation color patch C is measured in order. 100 sets of L ^* a ^* b ^* values obtained by measuring the color patch C for color evaluation are also stored in the RAM or HDD 75 in association with addresses.

When the color measurement for the attribute specifying color patch Z1 to Z3 and the color evaluation color patch C is completed as described above, the color evaluation for color evaluation having the same L ^* a ^* b ^* value as that of the attribute specifying color patch Z1 in step S220. The color patch C is searched. Since the L ^* a ^* b ^* values of the attribute specifying color patch Z1 and the color evaluation color patch C have already been obtained, the attribute specifying color patch Z1 is obtained by comparing the L ^* a ^* b ^* values. The same color patch C for color evaluation can be searched. Not only does the L ^* a ^* b ^* value strictly match, but also the attribute specification for the color evaluation color patch C for which the color difference ΔE is less than 1.0 and the L ^* a ^* b ^* value of the attribute specifying color patch Z1 Color patch Z and color evaluation color patch C. This is because the color reproduced at each position in the color chart 60 may vary and allow some variation.

If a color evaluation color patch C having the same L ^* a ^* b ^* value as the attribute specifying color patch Z1 can be searched, then the color specifying Zpatches Z2 and Z3 for attribute specifying and the L ^* a ^* b ^* value are the same for color evaluation. The color patch C is similarly searched. In the printing process of the color chart 60, the color evaluation color patch C at a specific address is printed with the same RGB (CMYK) values as the attribute specifying color patches Z1 to Z3. Regarding the L ^* a ^* b ^* values obtained in this way, the color patch C for color evaluation at a specific address is relatively the same as the color patches Z1 to Z3 for attribute specification. That is, no matter what printing conditions the color chart 60 is printed, the color evaluation color patch C and the attribute specifying color patches Z1 to Z3 at a specific address are printed under the same conditions based on the same color values. The color matching relationship is universally established. Accordingly, even if the absolute L ^* a ^* b ^* values of the attribute specifying color patches Z1 to Z3 are not defined for each printing condition such as the machine number and printing paper, erroneous identification of the ID number is prevented. be able to. That is, it is not necessary to separately prepare a color patch for absolutely defining colors used in the attribute specifying color patches Z1 to Z3, and the limited space of the color chart 60 can be used effectively. .

  In step S230, the attribute acquisition module 81c acquires the addresses of the three color evaluation color patches C that are the same color as the attribute specifying color patches Z1 to Z3 as specific addresses. When the color chart 60 is printed as in the above-described example, “01”, “23”, and “45” are acquired as specific addresses here. In step S240, the attribute acquisition module 81c further restores the ID number as the attribute of the present invention based on the three specific addresses. Specifically, the ID numbers are restored by arranging the specific addresses corresponding to the attribute specifying color patches Z1 to Z3 based on the arrangement of the attribute specifying color patches Z1 to Z3 in the color chart 60, respectively. Here, since “01”, “23”, and “45” are acquired as specific addresses respectively corresponding to the attribute specifying color patches Z1 to Z3, the ID number “012345” is acquired.

  Through the above processing, the ID number indicating the attribute of the color chart 60 that has been measured by the attribute acquisition module 81c can be acquired. Since this ID number is composed of random numbers generated each time the color chart 60 is printed, it is unique to each color chart. Therefore, the attribute acquisition module 81c acquires the ID number, so that the color chart 60 can be distinguished. For example, when the same ID number as the color chart 60 previously measured is obtained, it can be determined that the same color chart 60 is measured again.

The ID number is desirably generated uniquely for each color chart 60, and is preferably a random number weighted with a condition that does not overlap with previously generated ID numbers. Further, the ID numbers may be serial numbers so that they do not overlap with previously generated ID numbers.
The ID number as in the present embodiment as a 6-digit number, by adding the order corresponding to the arrangement of the attribute specifying color patches Z1 to Z3, a unique ID number for 100 ^three color chart 60 Can be generated. Of course, by increasing the number of attribute specifying color patches Z1 to Z3, more ID numbers may be prepared. Conversely, the number of attribute specifying color patches Z1 to Z3 may be reduced. . Further, the ID numbers may be distinguished simply by a combination of specific addresses, ignoring the arrangement of the attribute specifying color patches Z1 to Z3.

In step S250, the printing condition acquisition module 81d refers to the condition data 16, and acquires the printing conditions corresponding to the ID number acquired in step S240. Since the condition data 16 defines the correspondence between the ID number representing the attribute of the color chart 60 and the printing condition, the printing condition of the color chart 60 can be acquired with reference to the condition data 16. In step S260, the color evaluation module 81b calculates the color difference between the reference value 75a stored in the HDD 75 and the L ^* a ^* b ^* value obtained in step S210, and based on the same color difference ΔE. Correction data 90 is created. At this time, the reference value 75a to be compared is selected based on each printing condition acquired in step S250. For example, when the printing paper, the printing resolution, and the color tone are different, the colors to be compared are also different, so it is necessary to select the reference value 75a corresponding to the color tone at the time of printing. By acquiring printing conditions in step S250, an appropriate reference value 75a can be selected.

  In the present embodiment, the color conversion LUT 14 is corrected by the correction data 90. However, since the color conversion LUT 14 is prepared for each color tone (APF on / off), print resolution, and printing paper, correction data 90 for correcting the color conversion LUT 14 used when the color chart 60 is printed is created. Without it, there is no point. Further, since many printers 40 are connected to the CL computer 10, it is meaningless unless correction data 90 for correcting the color conversion LUT 14 of the printer 40 that has printed the color chart 60 is created. Therefore, in step S260, the printer 40 and the color conversion LUT 14 to be corrected are specified based on the printing machine body, the printing model, the printing paper, the printing resolution, and the color tone acquired as the printing conditions obtained from the ID number of the color chart 60. Attached identification data for. By doing so, it becomes possible to correct the color conversion LUT 14 of the printer 40 used when the color chart 60 is printed without mistake.

(4) Application examples:
By applying the present invention, the printing conditions can be acquired from the color chart 60 and the correction data 90 corresponding to the printing conditions can be created without inputting the printing conditions in the MS computer 70. In other words, even if the side operating the MS computer 70 and the side operating the CL computer 10 are not closely related, it is possible to perform appropriate correction. That is, if the color chart 60 and the correction data 90 can be exchanged between the two, appropriate correction can be performed. For example, the MS computer 70 may be owned by the manufacturer of the printer 40, receive a color chart 60 from each client, and perform a service such as sending correction data 90 to each client.

  In this way, it is possible to perform appropriate correction without performing an operation of specifying a correction target from a plurality of printers 40 and color conversion LUTs 14 in each client. Further, it is not necessary to record under which printing conditions the color chart 60 is printed. Therefore, the color reproducibility as intended by the manufacturer of the printer 40 can be realized without requiring special knowledge in the printer 40 of each client. The correction data 90 may be sent using the Internet or the like.

  In addition, it is conceivable that the colorimeter 50 is owned by a printing company that performs printing in large quantities. In that case, the MS computer 70 and the colorimeter 50 may be provided at the head office of the printing company, and the color chart 60 may be output by the printer 40 at each branch. By doing so, the color reproducibility of the multiple printers 40 provided in each branch can be matched, and the same print result can be obtained in any branch. In addition, a large number of printers 40 are installed in the printer, but since the machine number can be read from the color chart 60, it is not unclear which printer 40 the correction target is.

  In the above embodiment, the CL computer 10 and the MS computer 70 are provided separately. However, a system configuration in which the functions of the CL computer 10 and the MS computer 70 are realized on the same computer may be adopted. In addition, although the color conversion LUT 14 is corrected as an example, it is only necessary to recognize the attribute of the color chart 60 that has been measured, and the correction target may be anything.

(5) Modification:
In the embodiment described above, the specific address of the color patch for color evaluation that is the same color as the attribute specifying color patch is exemplified as corresponding to the ID number. However, this specific address directly corresponds to the printing condition. May be. For example, if each address of the color evaluation area data 17 shown in FIG. 3 is defined so as to mean the printing condition as it is, the printing condition can be acquired as an attribute without passing through the ID number. Specifically, the printing condition is associated with the address of each color evaluation color patch C referred to in the color evaluation area data 17 referred to in the printing stage of the color chart 60, and the color measurement stage of the color chart 60. In the array data 75b referred to in FIG. 8, the printing conditions may be associated with the addresses of the color patches C for color evaluation.

  FIG. 12 shows an address definition table T1 in which printing conditions are associated with the addresses of the color patches C for color evaluation. In the address definition table T1, printing models are associated with addresses 00 to 09 of the color patch C for color evaluation, and printing sheets are associated with addresses 10 to 19, respectively. Further, the print resolution is associated with each of the addresses 20 to 29 of the color patch C for color evaluation. This address definition table T1 is attached in common to each of the color evaluation area data 17 and the array data 75b.

  FIG. 13 shows the flow of color chart printing processing according to this modification. In step S300, the printing condition acquisition module 21b acquires the printing conditions as in the previous embodiment. Here, it is assumed that “PX9500” is acquired as the printing model, “Superfine” is acquired as the printing paper, and “1440 dpi × 720 dpi” is acquired as the printing resolution. In step S310, the specific address selection module 21c1 refers to the address definition table T1 and acquires an address corresponding to each printing condition described above. The address “05” is acquired corresponding to the printing model “PX9500”, the address “12” is acquired corresponding to the printing paper “super fine”, and the address “25” is corresponding to the printing resolution “1440 dpi × 720 dpi”. Is acquired. The addresses “05”, “12”, and “25” acquired as described above are selected as specific addresses in the present modification.

  In step S320, the attribute specific area data generation module 21c2 refers to the color evaluation area data 17, and acquires the RGB value of the color patch C for color evaluation located at the address selected as the specific address. Here, since the specific addresses are selected as “05”, “12”, and “25”, three sets of pixels belonging to the area corresponding to the addresses “05”, “12”, and “25” in the color evaluation area data 17 are selected. RGB values are acquired. In step S330, the attribute specifying area data 18 having the attribute specifying color patches Z1 to Z3 having the three RGB values acquired in step S330 by the attribute specifying area data generation module 21c2 as in step S150 of the previous embodiment. Is generated. Thereafter, the color chart 60 is printed as in the previous embodiment. Note that it is not necessary to create the condition data 16 in this modification.

  FIG. 14 shows the flow of color chart evaluation processing according to this modification. Up to step S430, the same processing as step S230 of the previous embodiment is performed. That is, also in this modification, three specific addresses are acquired, and “05”, “12”, and “25” are acquired as specific addresses here. In step S440, referring to the address definition table T1 attached to the array data 75b, print conditions corresponding to “05”, “12”, and “25” are acquired as specific addresses. According to the address definition table T1, the printing model “PX9500” corresponding to the address “05” is acquired, the printing paper “superfine” corresponding to the address “12” is acquired, and the printing resolution corresponding to the address “25” is acquired. “1440 dpi × 720 dpi” can be acquired. In step S450, correction data 90 is created as in step S260 of the previous embodiment.

  As described above, in this modification, printing conditions can be transmitted via the color chart 60 without passing through an ID number. Further, in the above modification, the address definition table T1 in which the printing conditions are associated with the addresses of the color patches C for color evaluation is used. However, the addresses of the color patches C for color evaluation in the address definition table are used. By associating characters, it is possible to transmit unspecified information on the color chart 60.

  FIG. 15 shows an address definition table T2 in which characters are associated with the addresses of the color patches C for color evaluation. In the figure, numbers 0 to 9 and alphabets a to z are associated with the addresses of the color patches C for color evaluation. The address definition table T2 is attached in common to each of the color evaluation area data 17 and the array data 75b, as in the modification described above. For example, when the print date “February 10, 2006 9:51” is acquired as the print condition, twelve identifications corresponding to the numbers of the print date “20060200951” are referred to the address definition table T2. Addresses “2” “0” “0” “6” “0” “2” “1” “0” “0” 9 “5” 1 ”are selected, and the specific addresses“ 2 ”“ 0 ”“ The RGB value of the color evaluation color patch C located at “0” “6” “0” “2” “1” “0” “0” “9” “5” “1” is acquired from the color evaluation area data 17. Then, twelve attribute specifying color patches Z are printed on the color chart 60 with the RGB values.

  In the color measurement stage, 12 specific addresses “2” “0” “0” “6” “0” “2” “1” “0” “0” “9“ ”5” “1” are acquired. By referring to the address definition table T2, twelve numbers “2” “0” “0” “6” “0” “2” “1” “0” “0” corresponding to each specific address "9" "5" "1" can be acquired. Thereby, the printing date and time “February 10, 2006 9:51” can be restored, and the color chart 60 can be evaluated based on the printing date and time. For example, the color measurement time may be compared with the printing date to determine whether or not a sufficient drying time of the color chart 60 has elapsed. In this way, by making the address of the color patch C for color evaluation correspond to characters, unspecified information such as the serial number of the printing press can be transmitted, and the type and amount of information that can be transmitted are flexible. It can correspond to.

It is a schematic block diagram of a color chart evaluation system. It is a schematic block diagram of a color chart printing apparatus. It is a figure which shows a color evaluation area | region. It is a figure which shows an attribute specific area | region. It is a figure which shows condition data. It is a figure which shows color chart data. 1 is a schematic configuration diagram of a color chart color measurement device according to an embodiment. It is a flowchart which shows the flow of a color chart printing process. It is a table | surface which shows the item of printing conditions. It is a figure which shows UI screen. It is a flowchart which shows the flow of a color chart evaluation process. It is a figure which shows an address definition table. It is a flowchart which shows the color chart printing process concerning a modification. It is a flowchart which shows the color chart evaluation process concerning a modification. It is a figure which shows an address definition table.

Explanation of symbols

C ... Color patch for color evaluation, Z ... Color patch for attribute specification, 10 ... CL computer, 14 ... Color conversion LUT, 15 ... HDD, 16, 75c ... Condition data, 17 ... Color evaluation area data, 18 ... Attribute specification area Data, 19a ... Serial communication I / O, 19b ... USB I / O, 20 ... OS, 20a ... Timer, 21 ... PRTDRV, 21a ... Print condition setting module, 21b ... Print condition acquisition module, 21c ... For attribute specification Color patch forming module, 21c1 ... specific address selection module, 21c2 ... attribute specific area data generation module, 21d ... condition data generation module, 21e ... image composition module, 21f ... color conversion module, 21g ... halftone processing module, 21h ... printing Data generation module, 21i ... LUT correction module , 22 ... Input device DRV, 23 ... Display DRV, 31 ... Keyboard, 32 ... Mouse, 33 ... Display, 34 ... CD-ROM drive, 40 ... Printer, 50 ... Colorimeter, 60 ... Color chart, 70 ... MS computer 71 ... CDR drive, 75 ... HDD, 75b ... array data, 79b ... USB I / O, 81 ... evaluation program, 81a ... correction data creation module, 81b ... color evaluation module, 81c ... attribute acquisition module, 81d ... printing Condition acquisition module 82 ... Colorimeter driver 90 ... Correction data A1 ... Color evaluation area A2 ... Attribute specific area T1, T2 ... Address definition table

Claims (10)

In a color chart evaluation system comprising a color chart printing device for forming a color chart in which a plurality of color patches are distributed on a recording medium, and a color chart colorimetry device for evaluating the color chart by measuring the color patch.
The color chart printing apparatus is
A color evaluation color in which the color patches with sample colors are arranged in a matrix and a color evaluation color patch whose address is defined by a combination of the number of rows and the number of columns in the matrix is formed on the same recording medium Patch forming means ;
A specific address corresponding to the attribute of the color chart is selected from the addresses, and the color patch for attribute specification which is the color patch of the same color as the color patch for color evaluation formed at the specific address is recorded on the recording medium A color patch forming means for attribute identification to be formed at a predetermined location on the upper side,
The color chart colorimetric device is
Specific address acquisition means for measuring the attribute specifying color patch and the color evaluation color patch, and acquiring the specific address where the color evaluation color patch of the same color as the attribute specifying color patch is located;
Attribute acquisition means for acquiring the attribute of the color chart based on the acquired specific address;
A color chart evaluation system comprising: color evaluation means for evaluating a color measurement result of the color patch for color evaluation. The attribute specifying color patch forming means includes:
2. The color chart evaluation system according to claim 1, wherein the specific address unique to each color chart is selected. The color chart printing apparatus is
Including a condition data generating means for generating condition data in which the printing condition when each color chart is printed and the specific address unique to each color chart are associated;
The attribute acquisition means
The condition data is acquired, and the printing condition corresponding to the specific address acquired by the specific address acquisition unit with reference to the condition data is acquired as an attribute of the color chart. The described color chart evaluation system. The address on the recording medium of the color patch for color evaluation corresponds to each printing condition when printing the color chart, and
The attribute specifying color patch forming means includes:
The color chart evaluation system according to claim 1, wherein the specific address corresponding to a printing condition for printing the color chart is selected. The attribute acquisition means
5. The color chart evaluation system according to claim 4, wherein the printing condition corresponding to the specific address acquired by the specific address acquisition unit is acquired as an attribute of the color chart. The attribute specifying color patch forming means includes:
While forming multiple color patches for attribute identification,
The attribute acquisition means
6. The attribute of the color chart is acquired according to the order of the specific address corresponding to the arrangement of the plurality of color patches for specifying the attribute on the recording medium. The described color chart evaluation system. In a color chart printing apparatus that prints a color chart in which a plurality of color patches are distributed on a recording medium,
A color evaluation color patch in which the color patches with sample colors are arranged in a matrix and a color evaluation color patch whose address is defined by a combination of the number of rows and the number of columns in the matrix is formed on the recording medium. Color patch forming means ;
A specific address corresponding to the attribute of the color chart is selected from the addresses, and the color patch for attribute specification which is the color patch of the same color as the color patch for color evaluation formed at the specific address is recorded on the recording medium A color chart printing apparatus comprising: an attribute specifying color patch forming unit formed at a predetermined location on the top. In a color chart colorimetry device for evaluating a color chart in which a plurality of color patches are distributed on a recording medium,
The color patches with the sample colors are arranged in a matrix, and the color patches for color evaluation whose addresses are defined by combinations of the number of rows and the number of columns in the matrix, and formed at predetermined locations on the recording medium The color patch for attribute identification that is the above color patch is measured,
Specific address acquisition means for acquiring a specific address that is the address where the color patch for color evaluation of the same color as the color patch for attribute specification is formed;
Attribute acquisition means for acquiring the attribute of the color chart based on the acquired specific address;
A color chart colorimetric apparatus comprising color evaluation means for evaluating a colorimetric result of the color patch for color evaluation. In a color chart evaluation method comprising a color chart printing device for forming a color chart in which a plurality of color patches are distributed on a recording medium, and a color chart colorimetry device for evaluating the color chart by measuring the color patch,
In the color chart printing apparatus,
The color patches with sample colors are arranged in a matrix and a color evaluation color patch whose address is defined by a combination of the number of rows and the number of columns in the matrix is formed on the recording medium ,
A specific address corresponding to the attribute of the color chart is selected from the addresses, and the color patch for attribute specification which is the color patch of the same color as the color patch for color evaluation formed at the specific address is recorded on the recording medium While forming at a predetermined location on the top,
In the color chart colorimetric device,
Measuring the color patch for attribute specification and the color patch for color evaluation, and acquiring the specific address where the color evaluation color patch of the same color as the attribute specification color patch is located;
Acquire the attribute of the color chart based on the acquired specific address,
A color chart evaluation method characterized by evaluating a color measurement result of the color patch for color evaluation. In a color chart evaluation program that allows a computer to realize a function of evaluating a color chart in which a plurality of color patches are distributed on a recording medium,
  On the computer,
  A color evaluation color patch measured by a color chart colorimetric device and provided with a sample color is arranged in a matrix, and an address is defined by a combination of the number of rows and the number of columns in the matrix; The color measurement result with the color patch for attribute specification that is the color patch formed at a predetermined location on the recording medium is acquired,
  Specific address acquisition means for acquiring a specific address that is the address where the color patch for color evaluation of the same color as the color patch for attribute specification is formed;
  Attribute acquisition means for acquiring the attribute of the color chart based on the acquired specific address;
  A color chart evaluation program for realizing a function of color evaluation means for evaluating a color measurement result of the color patch for color evaluation.

Images