JP5963511B2 - Data processing apparatus, data processing method and program thereof - Google Patents

Description

  The present invention relates to a data processing apparatus, a data processing method, and a program for performing data processing of colorimetric values obtained by irradiating a patch image with light and measuring reflected light from the patch image.

  The colorimetric device obtains a colorimetric value by irradiating light from a light source onto a patch image to be measured and measuring reflected light from the patch image (see Patent Document 1). Patent Document 1 describes that a light source having a spectrum covering the entire visible light is used. However, for example, in the case of a color measuring device configured with emphasis on low cost and space saving for mounting in a printing apparatus such as a printer, a light source having a relatively low unit price may be employed. For example, white LED for lighting equipment has a large production volume and a relatively low unit price.

JP 2004-245931 A

  However, when a white LED for lighting equipment is used as the light source of the color measuring device, it is designed not to emit light in the short wavelength region for insect repellent and durability, so the spectral reflectance on the short wavelength side is 0. %. Therefore, a highly accurate color measurement result cannot be obtained.

  The present invention has been made in view of the above problems, and obtains a highly accurate colorimetric result from spectral reflectance measured by irradiating light including a part of the visible wavelength range. An object of the present invention is to provide a data processing apparatus, a data processing method, and a program thereof.

An aspect of the present invention that solves the above problem is that the patch image printed on the recording medium is irradiated with light in a part of the wavelength range of visible light from the light source of the measurement unit, and the measurement is performed. a first obtaining unit that acquire a spectral reflectance measured by parts, the patch image of a first color material structure on the recording medium, the wavelength range of the measurement unit of the light source and the wavelength region of the part is not irradiated and irradiating light including bets, a second acquisition unit configured to obtain a reference spectral reflectance from the storage unit obtained by previously measured by colorimeter other than the measuring unit, the spectral reflectance measured by the measuring section And an adjustment means for specifying an adjustment value based on a reference spectral reflectance of the partial wavelength range, and a patch image having the same color material configuration as the first color material configuration among the printed patch images, light source radiation of the adjustment value and the measuring section Based on the reference spectral reflectance of no wavelength region, were identified by the interpolation means and the spectral reflectance and the interpolation means measured by said measuring unit for identifying the spectral reflectance in a wavelength region that is not measured by the measuring section the using the spectral reflectance in a wavelength region that is not measured by the measuring section, lying in a data processing apparatus according to claim comprising: a generating means for generating an interpolated spectral reflectance of the printed patch image.

  According to the present invention, from the spectral reflectance measured by irradiating light including a part of the visible light wavelength range, the spectral reflectance of the wavelength range other than the part of the wavelength range is high. There is an effect that an accurate color measurement result can be obtained.

FIG. 3 is an image diagram illustrating a state in which color measurement is performed using a printer including the color measuring device according to the first embodiment. 1 is a block diagram illustrating a configuration of an image processing system according to a first embodiment. 5 is a flowchart illustrating patch image colorimetry processing of the print system according to the first embodiment. It is a figure which shows the example of the prescription | regulation patch image which concerns on Embodiment 1. FIG. It is a figure which shows the example of the reference value of the spectral reflectance of the prescription | regulation patch image which concerns on Embodiment 1. FIG. 6 is a flowchart illustrating an operation for calculating a spectral reflectance of a prescribed patch image according to the first embodiment. 6 is a flowchart illustrating an operation of predicting a spectral reflectance of a patch image other than the specified patch image according to the first embodiment.

(Embodiment 1)
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an image diagram illustrating a state in which color measurement is performed using a printer incorporating a colorimeter.

  As shown in FIG. 1, the printer according to this embodiment includes a carriage 103 including a recording head for forming a patch image 102 on a sheet 101, and a sensor 104 provided on a side surface of the carriage 103. The carriage 103 forms a patch image 102 on the paper 101 by ejecting ink from the recording head while scanning the paper 101 left and right. The sensor 104 is a colorimeter, which irradiates a patch image printed on the paper 101 with light in a predetermined wavelength range and measures its spectral reflectance to measure a CIE L * a * b * value. A color value can be obtained.

  Here, the configuration of the image processing system according to the present embodiment will be described with reference to FIG. FIG. 2A is a first example of the image processing system according to the present embodiment.

  As shown in FIG. 2A, the image processing system according to the present embodiment includes a personal computer (hereinafter also referred to as “PC”) 201, and a printer 207 including a carriage 103 and a sensor 104. The PC 201 and the printer 207 are connected via an interface such as a network, USB, or local bus. This image processing system can form an image on a recording medium such as paper 101 by performing image processing for converting color data in a device-independent space into color material color data by a known method. In this first example, the PC 201 functions as the data processing apparatus of the present invention.

  The PC 201 includes a UI 202, a CPU (Central Processing Unit) 203, a work memory 204, a storage device 205, and a data input / output device 206. As shown below, a printer 207 is used as an information processing device. Various processes are performed with respect to the control.

  An operation unit 202 (also simply referred to as “UI”) serving as a user interface includes an input device such as a keyboard and a mouse and a display device such as a display. When image processing is executed, input processing by the user and display to the user are performed. Process.

  The CPU 203 executes control processing according to a program stored in the storage device 205, for example, a spectral reflectance interpolation processing program or a color prediction processing program described later.

  The work memory 204 is used as a work area when the CPU 203 performs control processing.

  The storage device 205 stores a system program, print target data created by the PC 201, various image processing parameters necessary for printing, a patch image to be described later, a reference spectral reflectance, and the like. Examples of the storage device 205 include a hard disk and a flash ROM. Further, the storage device 205 measures the configuration of the color material (ink, etc.) constituting the patch image and irradiates the specified patch image with light in a certain wavelength range (light including a wavelength range that cannot be emitted by the sensor 104). Spectral reflectance (hereinafter also referred to as reference spectral reflectance) is stored. Here, the configuration of the color material constituting the patch image is, specifically, patch image data (hereinafter also referred to as a specified patch) data in which the combination of color materials and the ratio thereof are specified in advance. This reference spectral reflectance is stored for each patch image and for each type of recording medium (paper or the like). In addition, this reference spectral reflectance is obtained by irradiating the spectral reflectance of the prescribed patch image with a colorimeter other than the sensor 104 in advance, specifically, light including a wavelength region other than the wavelength region of the sensor 104, It can be obtained by measuring with a colorimeter capable of measuring the spectral reflectance. Further, when the ideal value of the spectral reflectance of the prescribed patch image is known, it may be used.

  The data input / output device 206 is a portable data storage device represented by a CD or USB memory or a data communication device represented by a LAN card, and is used as an interface when inputting print target data.

  The printer 207 includes a data transfer unit 208, a printer control unit 209, an image processing unit 210, a printing unit 211, and a measuring unit 212, and performs printing using print data sent from the PC 201. Device. The print data here includes image data, image processing parameters, and printer control data. The printer control data includes control information of the measurement unit 212 when the patch image is colorimetrically processed.

  The data transfer unit 208 extracts image data and image processing parameters from the print data sent from the PC 201 and sends them to the image processing unit 210 and sends printer control data to the printer control unit 209. The printer control unit 209 controls the operation of the printer 207 including the measurement unit 212 according to the printer control data sent from the data transfer unit 208. The image processing unit 210 performs image processing such as color conversion and halftoning using the image data and image processing parameters sent from the data transfer unit 208, and sends the result to the printing unit 211.

  The printing unit 211 prints the processing result sent from the image processing unit 210 by ejecting ink using the recording head of the carriage 103. In this printer 207, the printing operation can be executed by a known method used in an ink jet printer, an electrophotographic printer, or the like, and is not a feature of the present invention. Therefore, detailed description thereof is omitted here.

  As described above, the printer 207 illustrated in FIG. 2A includes the measurement unit 212 that can measure the spectral reflectance of the printed patch image. In FIG. 2A, the measurement unit 212 is built in the printer 207, but the measurement unit 212 is not limited to a dedicated measurement device built in the printer, and a commercially available measurement device is directly connected to the printer 207. Alternatively, it may be connected via a network or the like.

  The measurement unit 212 includes a sensor that can measure the spectral reflectance. This sensor measures the spectral reflectance of the printed patch image, and obtains a colorimetric value such as a CIEL * a * b * value based on the spectral reflectance. Note that the sensor 104 in FIG. Then, the measurement unit 212 measures the spectral reflectance of the patch image printed by the printer 207 in accordance with an instruction from the printer control unit 209 and returns the result to the PC 201 via the printer control unit 209.

  The measuring unit 212 includes a light source that irradiates light onto a recording medium on which a patch image is printed. The light source of the measurement unit 212 according to the present embodiment irradiates light including a part of the visible light wavelength range.

  On the other hand, as described above, the storage device 205 irradiates the prescribed patch image with light including a wavelength range other than the wavelength range of light emitted from the light source of the measurement unit 212 (hereinafter also referred to as the wavelength range of the light source). The measured spectral reflectance is stored as a reference spectral reflectance.

  Here, the reference spectral reflectance is obtained by irradiating and measuring light including a wavelength region other than the wavelength region of the light source. The reference spectral reflectance is preferably obtained by irradiating and measuring light including the entire wavelength range of visible light. However, the reference spectral reflectance is not limited to light in a narrow wavelength range including a wavelength range other than the wavelength range of the light source. What was obtained by irradiating and measuring may be used. For example, the reference spectral reflectance may be obtained by irradiating light including a wavelength range shorter than the wavelength range of the light source, and includes a wavelength range longer than the wavelength range of the light source. What was obtained by irradiating light may be sufficient and both of these may be provided. Further, as described above, the reference spectral reflectance may be measured by irradiating light including a wavelength range other than the wavelength range of the light source, but at least a part of the wavelength range of the light source may be measured. It is preferable that it is measured by irradiating light containing it. As a reference spectral reflectivity, not only the wavelength range other than the wavelength range of the light source but also the one obtained by irradiating and measuring light including a wide wavelength range among the light source wavelength ranges is narrow among the light sources. Since the accuracy of the adjustment value to be described later is improved as compared with the case of providing the light obtained by irradiating and measuring the light including the wavelength region, it is possible to obtain a more accurate spectral reflectance. Furthermore, as a reference spectral reflectance, in the case of providing the light obtained by irradiating and measuring light in a wide wavelength region of visible light, by irradiating and measuring light in a narrow wavelength region of visible light A more accurate spectral reflectance can be obtained than when the obtained one is provided.

  In this embodiment, it is assumed that the light source of the measurement unit 212 emits light in the wavelength range of 420 nm to 700 nm, and the storage device 205 is a reference obtained by irradiating the prescribed patch image with light in the wavelength range of 380 nm to 730 nm. The spectral reflectance was stored in advance. Note that the measurement unit 212 measures the spectral reflectance in the same wavelength range as the light source.

  In this image processing system, print target data such as documents and images processed by various software can be printed. That is, the print target data processed by the print software in the PC 201 and the image processing parameters corresponding to the print settings can be selected from the storage device 205 and output to the printer 207 as print job data for printing.

  When the user instructs the start of color measurement processing of the patch image from the UI 202, the patch image is transmitted to the printer 207 and printed. Thereafter, the spectral reflectance is measured by the measurement unit 212 of the printer 207. As will be described in detail later, the measurement result can be converted into a predetermined colorimetric value by a predetermined method, and the converted result can be presented to the user via the UI 202 or the data input / output device 206.

  FIG. 2B shows a configuration of a second example of the image processing system according to the present embodiment.

  The printer 308 includes a calculation unit 301, an image processing unit 309, a printing unit 310, and a measurement unit 311. The printer 308 is connected to an external host PC 307 via a network or the like.

  The printer 308 includes an arithmetic unit 301 having the same function as the PC 201 having the first configuration. The arithmetic unit 301 includes a UI 302, a CPU 303, a work memory 304, a storage device 305, and a data input / output device 306. The CPU 303 has the same function as the CPU 203 described above. The calculation unit 301 performs the same operation as the PC 201 described above and controls the measurement unit 311.

  The data input / output device 306 is a data communication device represented by a LAN card. The data input / output device 306 is used as an interface when receiving print target data and an execution command for patch colorimetry processing from another host PC 307. FIG. 2B shows an example in which the data input / output device 306 is connected to the host PC 307 as an interface. However, data is input / output from a portable storage device represented by a CD or USB memory. It is good also as a structure.

  The UI 302 has the same function as the UI 202 described above, the work memory 304 has the same function as the work memory 204 described above, and the storage device 305 has the same function as the storage device 205 described above. The image processing unit 309 has the same function as the image processing unit 210 described above, the printing unit 310 has the same function as the printing unit 211 described above, and the measurement unit 311 includes the measurement unit 212 described above. Has the same function. Therefore, these descriptions are omitted.

  In the image processing system shown in FIG. 2B, the host PC 307 may not be used for color measurement. For example, if printing target data and color measurement results are input / output via a portable storage device, and normal print execution and patch color measurement processing commands are specified from the UI 302, the processing can be completed only by the printer 308. it can. In this second example, the printer 308 functions as the data processing apparatus of the present invention.

  Here, the color measurement process of the present embodiment will be described with reference to FIGS.

  First, FIG. 3 is a flowchart showing patch image colorimetry processing according to the present embodiment. Note that the patch image colorimetric processing is the same in both configurations of the image processing system of the first example and the image processing system of the second example described above. Therefore, unless otherwise specified, the image processing of the first example is performed. This will be described using the system.

  First, in step 301, the operator gives an instruction to execute the patch image colorimetry process on the UI 202. At this time, the operator designates a patch image to be measured. The operator can select a specified patch as a patch image for colorimetry, or can create an original patch image with a specified color material configuration and select both of these. You can also choose. When creating an original patch image and selecting it, not only the original patch image specified by the operator but also the patch image necessary for color prediction is included in the specified patch, or it is necessary for color prediction in advance. The color measurement of the patch image must be completed. The operator can also specify the color measurement result format (spectral reflectance, CIE L * a * b *, CIE XYZ, optical density, etc.). In the present embodiment, description will be made assuming that the spectral reflectance is designated as the color measurement result.

  In step 302, a test chart is prepared for printing. Specifically, first, image data of a patch image, image processing parameters for printing a patch image, and control data for patch image measurement are read from the storage device 205 into the work memory 204. Examples of the image data of the patch image include image data of a prescribed patch as shown in FIG. Next, print job data is generated from the read data and transferred to the data transfer unit 208.

  In step 303, the printer control unit 209 sets image processing parameters in the image processing unit 210 and performs image processing. In the case of the image processing system of the second example, the calculation unit 301 sets image processing parameters in the image processing unit 309 and performs image processing.

  In step 304, the data subjected to the image processing in step 303 is printed on the recording medium by the printing unit 211.

  In step 305, the spectral reflectance for each predetermined wavelength region of the printed patch image is measured by the measurement unit 212, and the result is stored in the storage device 205.

  In step 306, from the spectral reflectance of the patch image measured in step 305, the spectral reflectance in the wavelength region that is not actually measured for the patch image having the same color material configuration as the specified patch is interpolated using the means described later. .

  In step 307, it is determined whether or not the color measurement target patch designated in step 301 is only a patch image having the same color material configuration as the specified patch. If the patches to be measured are only patch images having the same color material configuration, the process proceeds to step 309. If a patch image having a color material configuration different from the color material configuration of the prescribed patch is included as a measurement target, the process proceeds to step 308.

  In step 308, the spectral reflectance is predicted for a patch image having a color material configuration different from the color material configuration of the prescribed patch, in other words, for a patch image having an original color material configuration. Although details will be described later, the original color is determined based on the color prediction method described later from the measured spectral reflectance of the patch image measured in step 305 and the spectral reflectance of the patch image calculated by interpolation in step 306. Predict and interpolate the spectral reflectance of the patch image consisting of the material composition.

  In step 309, the interpolated spectral reflectance of the patch image is calculated from the spectral reflectance interpolated in step 306 and the spectral reflectance calculated by prediction and interpolation in step 308 as necessary. Then, it is converted into a colorimetric value in the format specified in step 301 by a known method. The obtained colorimetric value is presented to the user via the UI 202 or the data input / output device 206, and the process is terminated.

  When printing with the printer 207, the PC 201 performs color calibration of each ink color of the print data to be printed based on the spectral reflectance calculated in step 308 or the converted colorimetric value. Instruct to print.

  FIG. 4 is an example of the specified patch image according to the present embodiment. The prescribed patch is preferably configured to include a patch necessary for processing. For example, when color prediction is performed, it is preferable that the specified patch is configured to include a patch image necessary for calculation of color prediction. When a general Yule-Nielsen and Neugebauer method is used for color prediction, a patch image obtained by combining a primary color of a printer color material and an N-order color obtained by mixing a plurality of color materials is used as a specified patch. On the other hand, in the color prediction, as shown in Japanese Patent No. 04131204, when the method of predicting the N-order color from only the spectral reflectance of the primary color is used, only the primary color patch image is used as the specified patch. Is possible. Note that processing that uses only primary colorimetric values, such as general calibration, omits interpolation by color prediction, which will be described later, by including all patches necessary for processing in the specified patch. be able to.

  A method for holding a reference value (also referred to as “reference spectral reflectance”) of the spectral reflectance of the specified patch image will be described with reference to FIG. FIG. 5 is an example of the reference value of the spectral reflectance of the specified patch image according to the first embodiment. The reference spectral reflectance is obtained by irradiating light including a predetermined wavelength range, specifically, a wavelength range other than the wavelength range of the light emitted from the light source, and measuring accurately. In the present embodiment, the reference spectral reflectance is obtained by measuring by irradiating light in a wavelength range wider than the wavelength range of the light emitted by the light source included in the sensor 104. The value of the reference spectral reflectance in FIG. 5 is a reflection ratio when the irradiated light is 1. The reference spectral reflectance is stored in the storage device 205 in association with the combination of color materials constituting the patch image and the ratio thereof. In this embodiment, since ink is used as the color material, the reference spectral reflectance is stored in the storage device 205 in association with the ink component ratio.

  Here, the method for interpolating the spectral reflectance of the patch in step 306 will be described with reference to FIG. FIG. 6 is a flowchart showing the operation of Step 306 of FIG. 3, that is, the operation of interpolating the spectral reflectance of a patch having the same color material configuration as the specified patch.

  First, in step 601, the CPU 203 acquires the reference spectral reflectance of the specified patch image from the storage device 205. This specified patch image is created with the same color material composition ratio as at least a part of the data (image) printed in step 304. At this time, the reference spectral reflectance is preferably a spectral reflectance of a prescribed patch image created on the same recording medium as the recording medium used in step 304.

In step 602, the CPU 203 calculates an adjustment value from the actually measured spectral reflectance and the reference spectral reflectance. Specifically, the ratio between the measured spectral reflectance and the corresponding reference spectral reflectance is obtained for each predetermined wavelength, and the adjustment value is calculated by averaging these ratios. In the present embodiment, a spectral reflectance R _m (λ) of 420 nm to 700 nm measured by the measuring unit 212 is acquired every 40 nm, and the corresponding reference spectral reflectance R _r (λ) is calculated using the following equation: The adjustment value A is calculated by averaging the ratios.

In step 603, the CPU 203 interpolates the spectral reflectance of the wavelength (wavelength not actually measured) that cannot be acquired from the measurement unit 212 from the adjustment value and the reference spectral reflectance. Specifically, the spectral reflectance of wavelengths not measured is interpolated by multiplying the reference spectral reflectance of wavelengths not measured by the adjustment value A calculated in step 602. In the present embodiment, as shown in the following equation, the adjustment value A calculated in step 602 is set to the reference spectral reflectance R _r (λ) of wavelengths (380 nm to 410 nm, 710 nm to 730 nm) that cannot be acquired by the measurement unit 212. Multiply each. Thereby, the spectral reflectance R′m (λ) of the wavelength that cannot be acquired by the measurement unit 212 is calculated.

In step 604, the spectral reflectance R _m (λ) of 420 nm to 700 nm measured by the measurement unit 212 and the spectral reflectance R′m (λ) calculated in step 603 are combined to form the same color material structure as that of the specified patch. The interpolated spectral reflectance of the patch image consisting of This interpolated spectral reflectance is stored in the storage device 205.

  Here, a method for predicting the spectral reflectance of a patch image (hereinafter also referred to as “another patch image”) having a color material configuration different from that of the prescribed patch image will be described with reference to FIG. FIG. 7 is a flowchart showing the operation of Step 308 of FIG. 3, that is, the operation of predicting the spectral reflectance of another patch image.

  First, in step 701, the CPU 203 acquires information on the color material configuration of another patch image that is the measurement target input in step 301 of FIG. The color material configuration information used at this time may be directly input by the user, or the image processing parameters stored in the storage device 205 of the image processing system are the color data of the device-independent space input by the user. It may be obtained by using and converting.

  In step 702, the CPU 203 obtains the spectral reflectance of the patch image necessary for color prediction from the interpolated spectral reflectance of the patch image stored in the storage device 205 in step 604 of FIG. The necessary patch image referred to here depends on the color prediction algorithm as described above, and may be a patch image in which the primary color of the printer color material and the N-order color obtained by mixing a plurality of color materials are combined. For example, there may be only a primary color patch image.

In step 703, the interpolated spectral reflectance of the patch image having the same color material configuration as the specified patch acquired in step 702 is used, and the CPU 203 uses the spectral prediction formula to determine the spectral reflectance R _p (λ) of other patch images. Predict. The color prediction method can be executed by the above-described Yule-Nielsen, Neugebauer method or a method as disclosed in Japanese Patent No. 04131204. Since this color prediction method is not a feature of the present invention, detailed description thereof is omitted.

In step 704, an adjustment value B is calculated from the actually measured spectral reflectance and the predicted spectral reflectance R _p (λ) predicted in step 703. Specifically, the adjustment value B is calculated by the same method as step 602 in FIG. 6 except that the predicted spectral reflectance R _p (λ) is used instead of the reference spectral reflectance R _r (λ).

In step 705, the spectral reflectance of a wavelength (wavelength not actually measured) that cannot be acquired from the measurement unit 212 is interpolated from the adjustment value B and the predicted spectral reflectance R _p (λ). Specifically, it is the same as step 603 in FIG. 6 except that the predicted spectral reflectance R _p (λ) is used instead of the reference spectral reflectance R _r (λ) and the adjustment value B is used instead of the adjustment value A. The spectral reflectance R ′ _m (λ) is calculated by the method. In the present embodiment, spectral reflectances R ′ _m (λ) of 380 nm to 410 nm and 710 nm to 730 nm are calculated.

In step 706, the CPU 203 combines the spectral reflectance R _m (λ) of 420 nm to 700 nm measured by the measuring unit 212 and the spectral reflectance R ′ _m (λ) calculated in step 705, to generate another patch image. Obtain the predicted and interpolated spectral reflectance. This predicted / interpolated spectral reflectance is stored in the storage device 205.

  As described above, the reference spectral reflection measured in advance by irradiating the patch image created using the color material used in the color measuring device on the recording medium with light including a wavelength region other than the actually measured wavelength region. By using the rate, it is possible to obtain a colorimetric value with high accuracy even if measurement is performed by irradiating light in a narrow wavelength region. Specifically, an adjustment value is calculated based on the reference spectral reflectance measured in advance by irradiating light including a wavelength range other than the actually measured wavelength range and the actually measured spectral reflectance, and the spectrum in the wavelength range not being measured is calculated. By performing the reflectance interpolation, the colorimetric value can be obtained with high accuracy. That is, according to the present invention, even when a colorimetric device using a light source that irradiates light in a wavelength region that is insufficient for colorimetry, for example, a wavelength region in a part of visible light, is highly accurate. A colorimetric value can be obtained.

(Other embodiments)
Although each embodiment has been described above, the basic configuration of the present invention is not limited to that described above.

  As described above, the reference spectral reflectance is preferably the spectral reflectance of the specified patch image created on the same recording medium as the recording medium used in step 304, but is not limited thereto. is not. For example, a predetermined value corresponding to the type of the recording medium is added to the reference spectral reflectance of the specified patch image created on the recording medium different from the recording medium used in step 304, and the desired The reference spectral reflectance of the recording medium may be obtained.

In the above-described embodiment, the spectral reflectance R _m (λ) measured by the measurement unit 212 is obtained every 40 nm to obtain an adjustment value. However, the adjustment value is not limited thereto, and is obtained, for example, every 20 nm or every 60 nm. May be. In the above-described embodiment, the ratio between the measured spectral reflectance and the corresponding reference spectral reflectance is obtained for each predetermined wavelength, and the adjustment value is calculated by averaging the ratios. "Wavelength range" does not have to match completely. For example, when the difference in wavelength from the measured spectral reflectance is small (for example, 10 nm or less), it is determined as the corresponding reference spectral reflectance, and the ratio between the measured spectral reflectance and the corresponding reference spectral reflectance is calculated. You may ask for it.

  In the above-described embodiment, the reference spectral reflectance stored in the storage device 205 of the PC 201 is acquired. However, the present invention is not limited to this. For example, the reference spectral reflectance may be acquired from a storage device on the network via the network, or the reference spectral reflectance held by another printer may be acquired.

  In the embodiment described above, an original patch image having a color material configuration different from that of the specified patch can be selected and measured, but the present invention is not limited to this. In the case of a colorimetric device that measures only a patch image having the same color material configuration as that of the specified patch, a configuration for determining whether the color measurement target is only a patch image having the same color material configuration as that of the specified patch or performing color prediction May not be provided.

  The data processing apparatus of the present invention can be applied to apparatuses and systems that perform colorimetric processing of a colorimetric apparatus, and can also be applied to image processing systems and other systems other than those described above.

  Moreover, this embodiment is implement | achieved also by performing the following processes. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (CPU, MPU, etc.) of the system or apparatus reads and executes the program. It is processing to do. Further, the program may be executed by one computer or may be executed in conjunction with a plurality of computers. Moreover, it is not necessary to implement all of the above-described processing by software, and part or all of the processing may be implemented by hardware.

101 Paper 102 Patch 103 Carriage 104 Colorimetric sensor 201 PC
202,302 UI
203, 303 CPU
204, 304 Work memory 205, 305 Storage device 206, 306 Data input / output device 207, 308 Printer 208 Data transfer unit 209 Printer control unit 210, 309 Image processing unit 211, 310 Printing unit 212, 311 Measurement unit 301 Calculation unit 307 Host PC

Claims (9)

The patch image printed on a recording medium, by irradiating the light of some wavelength region from among the wavelength range of visible light from the measurement unit of the light source, get the spectral reflectance measured by the measuring unit first 1 acquisition means;
A patch image of a first color material structure on the recording medium, by irradiating the light source of the wavelength region and the measurement portion of the part and a wavelength region not irradiated, colorimetry other than the measurement unit a second obtaining unit configured to obtain a reference spectral reflectance from the storage unit obtained by previously measured by vessels,
Adjusting means for specifying an adjustment value based on the spectral reflectance measured by the measurement unit and the reference spectral reflectance of the partial wavelength range ;
For a patch image having the same color material configuration as the first color material configuration among the printed patch images, based on the adjustment value and a reference spectral reflectance in a wavelength region that is not irradiated by the light source of the measurement unit , Interpolation means for identifying spectral reflectance in a wavelength range not measured by the measurement unit;
Using the spectral reflectance in a wavelength region that is not measured by the measuring unit identified by the spectral reflectance and the interpolation means measured by said measuring unit, generating for generating interpolated spectral reflectance of the printed patch image Means,
A data processing apparatus comprising: The data processing apparatus according to claim 1,
If the printed patch image includes a second patch images of different second color material constituting the said first coloring material structure, the third acquisition means for acquiring color material structure of the second patch image,
Color predicting means for predicting the spectral reflectance of the second patch image based on the interpolated spectral reflectance generated by the generating means and the color prediction formula;
Second adjustment means for specifying a second adjustment value based on the spectral reflectance measured by the measurement unit and the spectral reflectance predicted by the color prediction means;
Second interpolation means for specifying spectral reflectance in a wavelength region that is not measured by the measurement unit based on the second adjustment value and the predicted spectral reflectance;
Second generation means for generating an interpolated spectral reflectance of the second patch image using the spectral reflectance measured by the measurement unit and the spectral reflectance specified by the second interpolation means;
A data processing apparatus comprising: 3. The data processing device according to claim 1, wherein the adjustment unit is a ratio between a spectral reflectance measured by the measurement unit and a reference spectral reflectance of a wavelength corresponding to the spectral reflectance measured by the measurement unit. A data processing device that specifies an adjustment value for each predetermined wavelength based on The data processing device according to any one of claims 1 to 3, further comprising the storage unit .   5. The data processing apparatus according to claim 1, wherein the second acquisition unit acquires the reference spectral reflectance for each type of recording medium. 6. The data processing device according to claim 1, further comprising a measurement unit.   7. The data processing apparatus according to claim 1, further comprising a printing unit that prints the patch image on a recording medium. The patch image printed on a recording medium, by irradiating the light of some wavelength region from among the wavelength range of visible light from the measurement unit of the light source, get the spectral reflectance measured by the measuring unit first 1 acquisition process;
A patch image of a first color material structure on the recording medium, by irradiating the light source of the wavelength region and the measurement portion of the part and a wavelength region not irradiated, colorimetry other than the measurement unit a second acquisition step of acquiring reference spectral reflectance from the storage unit obtained by previously measured by vessels,
An adjustment step for specifying an adjustment value based on the spectral reflectance measured by the measurement unit and the reference spectral reflectance of the partial wavelength range ;
For a patch image having the same color material configuration as the first color material configuration among the printed patch images, based on the adjustment value and a reference spectral reflectance in a wavelength region that is not irradiated by the light source of the measurement unit , An interpolation step for identifying spectral reflectance in a wavelength region not measured by the measurement unit ;
Using said spectral reflectance in the wavelength region that is not measured by the measuring unit identified Oite the spectral reflectance and the interpolation step was measured by the measurement unit, generates a interpolated spectral reflectance of the printed patch image Generating process to
A data processing method comprising: A program for executing the data processing method according to claim 8 by a computer.

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