JP6115241B2 - Colorimeter, image processing apparatus, and colorimetric method - Google Patents

Description

  The present invention relates to a colorimeter, an image processing apparatus, a color measurement method, and the like.

  As a means for measuring the color displayed by a display device such as a liquid crystal display, there is a method using a stand-alone colorimeter or a spectrophotometer. This method is not suitable for general users because it is expensive and difficult to handle.

  Further, there is a method using a densitometer or an RGB sensor built in the display device, but this method has a lower measurement accuracy than a method using a spectrophotometer or the like. In Patent Document 1, when the display characteristic amount of a monitor is measured by an RGB sensor, the display characteristic amount of the monitor is estimated based on definition information such as the ICC profile of the monitor stored in the image generation apparatus, and the estimated display It is described that the measurement time of the sensor is changed based on the characteristic amount.

  On the other hand, there is a method of incorporating a small spectroscope such as a Fabry-Perot system in a display device. This method improves measurement accuracy and usability.

JP 2010-237350 A

  However, in a method using a spectroscope such as a Fabry-Perot system, it is necessary to perform electrical control for each wavelength to be measured due to the mechanism of the spectroscope. Therefore, as the number of wavelengths to be measured increases, the time required for measurement increases.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to shorten measurement time while maintaining measurement accuracy when performing color measurement using a Fabry-Perot spectroscope.

  A first aspect of the present invention that solves the above problem is based on a spectral sensor unit, a color patch generation unit that generates color patch image information of a color patch image output from an image processing device, and the color patch image information. And selecting a wavelength of light to be measured by the spectroscopic sensor unit based on information indicating spectral characteristics when the color patch image is output by the image processing apparatus, and measuring time of the wavelength of each selected light A measurement condition setting unit that sets the wavelength of the light and the measurement time as measurement conditions, and the spectral sensor unit that outputs the color patch image output from the image processing device based on the color patch image information. A measurement control unit that controls measurement based on the set measurement conditions, and the wavelength of each light measured by the spectroscopic sensor unit Based on the data, a colorimeter and having and a calculator for calculating the spectral characteristics and color values of the output of the image processing apparatus. In this way, the spectral characteristic of the light emitted when the color patch is displayed is specified, and the measurement by the spectroscope is performed based on the specified spectral characteristic, so that the measurement accuracy is maintained, Measurement time can be shortened.

  The measurement condition setting unit, based on information indicating the spectral characteristic when the color patch image is output by the image processing device, determines the wavelength of light that is a characteristic point of the spectral characteristic by the spectral sensor unit. The wavelength may be selected as the wavelength of light to be measured. In this way, since the characteristic wavelength is the actual measurement object, it is easy to maintain the accuracy when calculating the spectral characteristics.

  The measurement condition setting unit obtains a second derivative of the spectral characteristic based on information indicating the spectral characteristic when the color patch image is output by the image processing apparatus, and starts from a higher second derivative value. A predetermined number of wavelengths of light may be determined as the feature points. In this way, since the wavelength having a more characteristic is preferentially set as the actual measurement object, the accuracy in calculating the spectral characteristics can be maintained.

  The measurement condition setting unit obtains a second derivative of the spectral characteristic based on information indicating the spectral characteristic when the color patch image is output by the image processing apparatus, and the second derivative has a predetermined threshold value. The wavelength of the light exceeding may be determined as the feature point. In this way, the wavelength can be appropriately selected even when the spectral characteristic includes a lot of peaky portions.

  The colorimeter has a color correction information generation unit that generates color correction information used for color correction processing when the image processing apparatus outputs an image based on the color value calculated by the calculation unit. This may be a feature. In this way, color correction information used for color correction of the image processing apparatus can be generated while maintaining accuracy and shortening the time.

  A second aspect of the present invention that solves the above problem is the image processing apparatus including the colorimeter, wherein the color patch image and an output unit that outputs the image, and the image are output. And a color correction processing unit that performs color correction processing based on the color correction information. In this way, in the image processing apparatus, it is possible to shorten the generation time of the color correction information and perform color correction processing that maintains accuracy.

  A third aspect of the present invention that solves the above problem is the image processing apparatus including the colorimeter described above, wherein the color output calculated by the calculation unit is output as profile information. It is characterized by having. In this way, in the image processing apparatus, it is possible to shorten profile information generation time and output profile information maintaining accuracy.

  The image processing device may be a display device, a projection device, or a printing device. In this way, in the display device, it is possible to shorten the generation time of color correction information and profile information related to display and maintain accuracy. Further, in the projection apparatus, it is possible to shorten the generation time of color correction information and profile information related to projection and maintain accuracy. Further, in the printing apparatus, it is possible to shorten the generation time of color correction information and profile information related to printing and maintain accuracy.

  A fourth aspect of the present invention that solves the above problem is a measurement method for measuring output characteristics of an image processing apparatus using a spectroscopic sensor unit, and a color patch of a color patch image output from the image processing apparatus A color patch generation step for generating image information, and measurement by the spectral sensor unit based on information indicating spectral characteristics when the color patch image is output by the image processing device based on the color patch image information Based on the color patch image information, selecting a wavelength of light, determining a measurement time of the wavelength of each selected light, and setting the wavelength of the light and the measurement time as measurement conditions, and the color patch image information Measurement of the color patch image output from the image processing apparatus by the spectral sensor unit is performed based on the set measurement conditions. And a control step for calculating the spectral characteristics and color values of the output of the image processing device based on the wavelength data of each light measured by the spectroscopic sensor unit. And In this way, the spectral characteristic of the light emitted when the color patch is displayed is specified, and the measurement by the spectroscope is performed based on the specified spectral characteristic, so that the measurement accuracy is maintained, Measurement time can be shortened.

It is a figure which shows an example of schematic structure of the display apparatus 1 which concerns on 1st embodiment of this invention. 3 is a diagram illustrating an example of a schematic configuration of a spectroscopic unit 142. FIG. It is a figure which shows an example of a display characteristic table. It is a figure which shows an example of a measurement time table. It is a figure which shows an example of a color correction table. It is a flowchart which shows an example of the process which produces | generates color correction data. It is a figure explaining an example of the determination method of a measurement wavelength. It is a figure explaining an example of the production | generation method of color correction data. It is a flowchart which shows an example of a color correction process. It is a figure which shows an example of schematic structure of the projection apparatus 2 which concerns on 2nd embodiment of this invention. It is a figure which shows an example of schematic structure of the printing apparatus 3 which concerns on 3rd embodiment of this invention. It is a flowchart which shows an example of the process which produces | generates color correction data. It is a flowchart which shows an example of a color correction process. It is a figure explaining the example of the installation position of the spectroscopic sensor part 140 in each image processing apparatus.

<First embodiment>
A first embodiment of the present invention will be described with reference to the drawings. In the following description, the term “image” is used uniformly, but “video” can be handled in the same manner as an image.

  FIG. 1 is a diagram showing an example of a schematic configuration of a display device 1 according to the first embodiment of the present invention.

  The display device 1 is a liquid crystal display, for example. Here, the display device 1 includes a small Fabry-Perot type spectroscopic sensor. The display device 1 separates light of a color patch image displayed on a display surface such as a liquid crystal display by a spectroscopic sensor, and detects the luminance of the light having the dispersed wavelength. Further, based on the detected brightness of each wavelength, color correction data used when the display device 1 performs display based on the input image signal is generated. The display device 1 corrects the input image signal using the generated color correction data and performs display.

  In order to realize the above functions, the display device 1 includes a measurement control unit 100, a storage unit 110, a display unit 120, a signal processing unit 130, and a spectroscopic sensor unit 140. Note that the measurement control unit 100, the storage unit 110, and the spectroscopic sensor unit 140 may be components as a colorimeter built in the display device 1. The display unit 120, the signal processing unit 130, the spectroscopic sensor unit 140, the measurement control unit 100, and the storage unit 110 will be described in this order.

  The display unit 120 is a display unit such as a liquid crystal display. The display unit 120 displays an image on the display surface in accordance with the image signal output from the signal processing unit 130. The “display unit” may be called an “output unit”.

  For example, when an image signal is input from the information processing apparatus 5 such as a PC (Personal Computer), the signal processing unit 130 sets the color of the input image signal based on the color correction data stored in the color correction data storage unit 112. Correct and output to the display unit 120. Note that the signal processing unit 130 reads out the color correction data from the color correction data storage unit 112 and stores it in the internal storage device, and performs color correction using the color correction data in the storage device. Also good. The “signal processing unit” may be called a “color correction processing unit”.

  Further, when an image signal of a color patch image is input from the measurement control unit 100 or the storage unit 110, the signal processing unit 130 outputs the color patch image to the display unit 120 without performing color correction.

  The spectroscopic sensor unit 140 is a light detection device including a Fabry-Perot spectroscope. In the first embodiment, the spectroscopic sensor unit 140 is installed, for example, at a position and an orientation facing the display surface of the display unit 120 so that light from the display unit 120 can be detected.

  The spectral sensor unit 140 includes a light guide unit 141, a spectral unit 142, a light receiving unit 143, a spectral control unit 144, and a light reception control unit 145.

  For example, as shown in FIG. 14A (a diagram illustrating an example of an installation position of the spectral sensor unit 140 in the display device 1), the spectral sensor unit 140 is directed to the display surface side of the display unit 120. As shown in FIG.

  The light guide unit 141 is a member that guides light from the display unit 120 to the spectroscopic unit 142. The light guide unit 141 includes, for example, an opening (may be referred to as an aperture), and guides the light emitted from the display surface to the spectroscopic unit 142. Of course, the light guide 141 is not limited to the above-described configuration, and may include any one or two or more of components such as an opening, an optical fiber, and a lens. The optical fiber and the lens condense light emitted from the display surface and guide it to the spectroscopic unit 142.

  The spectroscopic unit 142 is a member that splits light having a specific wavelength from the light emitted from the display unit 120. FIG. 2 is a diagram illustrating an example of a schematic configuration of the spectroscopic unit 142.

  The spectroscopic unit 142 has, for example, a rectangular shape in plan view, and has a long side of, for example, 10 mm. Therefore, FIG. 2 is a cross-sectional view in which the center of the spectroscopic unit 142 is cut in the long side or short side direction. The spectroscopic unit 142 includes a fixed substrate 1421 and a movable substrate 1422. The fixed substrate 1421 and the movable substrate 1422 are each formed of, for example, various types of glass such as soda glass, crystalline glass, and quartz glass, crystal, and the like. Then, the fixed substrate 1421 and the movable substrate 1422 are integrally configured by being bonded by, for example, room temperature activation bonding.

  A fixed reflection film 1423 and a movable reflection film 1424 are provided between the fixed substrate 1421 and the movable substrate 1422. The fixed reflective film 1423 is fixed to the surface of the fixed substrate 1421 that faces the movable substrate 1422. The movable reflective film 1424 is fixed to the surface of the movable substrate 1422 that faces the fixed substrate 1421. The fixed reflective film 1423 and the movable reflective film 1424 are arranged to face each other with the gap G interposed therebetween.

  Further, between the fixed substrate 1421 and the movable substrate 1422, an electrostatic actuator 1425 for adjusting the gap G between the fixed reflective film 1423 and the movable reflective film 1424 is provided.

  The fixed substrate 1421 is formed by processing a glass substrate having a thickness of, for example, 500 μm by etching. An electrode formation groove 1426 is formed in the fixed substrate 1421 by etching. In the electrode forming groove 1426, a first electrode 1425a constituting the electrostatic actuator 1425 is formed. The first electrode 1425a is connected to the spectroscopic control unit 144 (see FIG. 1) via an electrode lead-out unit (not shown).

  The movable substrate 1422 is formed by processing a glass substrate having a thickness of, for example, 200 μm by etching. The movable substrate 1422 is formed with a second electrode 1425b constituting the electrostatic actuator 1425 that faces the first electrode 1425a via an electromagnetic gap. The second electrode 1425b is connected to the spectroscopic control unit 144 (see FIG. 1) via an electrode lead-out unit (not shown).

  The electrostatic attraction acts between the first electrode 1425a and the second electrode 1425b by the voltage output from the spectroscopic control unit 144, the gap G is adjusted, and the spectroscopic unit 142 is transmitted according to the gap interval. The transmission wavelength of light is determined. That is, by appropriately adjusting the gap interval by the electrostatic actuator 1425, the light transmitted through the spectroscopic unit 142 is determined, and the light transmitted through the spectroscopic unit 142 is received by the light receiving unit 143.

  Returning to FIG. The light receiving unit 143 is a member that detects light. The light receiving unit 143 includes, for example, a photodiode, a photo IC, or the like. When receiving the light transmitted through the spectroscopic unit 142, the light receiving unit 143 generates an electric signal (luminance value) corresponding to the intensity of the received light. Then, the light receiving unit 143 outputs the generated electric signal to the measurement control unit 100 as a light receiving signal.

  Based on the drive control signal output from the light reception control unit 145, the light reception unit 143 outputs an electrical signal accumulated according to the light intensity or the like to the measurement control unit 100. That is, the light receiving unit 143 outputs the accumulated electrical signal to the measurement control unit 100 at the timing of the drive control signal. Note that the timing of a certain drive control signal is also a timing at which accumulation of an electric signal to be output at the timing of the next drive control signal is started.

  The spectroscopic control unit 144 is a drive circuit that controls the spectroscopic unit 142. The spectroscopic control unit 144 is connected to each electrode extraction unit of the spectroscopic unit 142 and the measurement control unit 100. When a drive control signal is input from the measurement control unit 100, the spectroscopic control unit 144 outputs the drive control signal to the spectroscopic unit 142. Thereby, the drive voltage based on the drive control signal is applied between the first electrode 1425a and the second electrode 1425b via each electrode lead-out portion. Then, electrostatic attraction acts between the first electrode 1425a and the second electrode 1425b, the gap interval is adjusted, and the wavelength of the light transmitted through the spectroscopic unit 142 is determined according to the gap interval.

  The light reception control unit 145 is a drive circuit that controls the light reception unit 143. The light reception control unit 145 is connected to the light reception unit 143. When the drive control signal is input from the measurement control unit 100, the light reception control unit 145 outputs the drive control signal to the light reception unit 143. Thereby, the electrical signal accumulated in the light receiving unit 143 during the designated measurement time is output to the measurement control unit 100.

  Of course, the installation position and configuration of the spectroscopic sensor unit 140 are not limited to the above example as long as the light emitted from the display surface of the display unit 120 can be detected.

  The measurement control unit 100 performs control related to display measurement by the display device 1. The measurement control unit 100 includes a color patch generation unit 101, a measurement condition setting unit 102, a spectral characteristic calculation unit 103, a color value calculation unit 104, and a color correction data generation unit 105.

  The color patch generation unit 101 generates one or more pieces of color patch image information (may be referred to as “color image information”) used for generating color correction data, and outputs the generated information to the signal processing unit 130.

  The measurement condition setting unit 102 determines and sets measurement conditions (measurement wavelength, measurement time, etc.) for each color patch image based on the data regarding the display characteristics of the display unit 120 stored in the display characteristic storage unit 111. .

  The measurement control unit 100 controls the spectroscopic sensor unit 140 based on the measurement conditions set by the measurement condition setting unit 102. That is, the measurement control unit 100 outputs a drive control signal to the spectroscopic control unit 144 so that the light of the set measurement wavelength is transmitted by the spectroscopic unit 142, and the electric power of the accumulated light for the set measurement time. A drive control signal is output to the light reception control unit 145 so that the signal is output from the light reception unit 143.

  The spectral characteristic calculation unit 103 calculates the spectral characteristic (for example, spectral curve) of each color patch image based on the electrical signal (luminance value) of light output from the light receiving unit 143, measurement conditions, and the like, and calculates the color value. Output to the unit 104. Note that when calculating the spectral characteristics, the spectral characteristic calculation unit 103 performs gain correction, interpolation processing in the wavelength direction, and the like for the obtained luminance values of the respective wavelengths.

  The color value calculation unit 104 calculates the color value of each color patch image based on the spectral characteristics of each color patch image output from the spectral characteristic calculation unit 103 and outputs the color value to the color correction data generation unit 105. As the color value, for example, a value in an XYZ color space conforming to the CIE standard or a value in an L * a * b * color space can be used.

  The color correction data generation unit 105 is a color for causing the display unit 120 to display the color specified by the input image signal as a desired target color based on the color value of each color patch output from the color value calculation unit 104. Correction data is generated and stored in the color correction data storage unit 112.

  Data necessary for processing of the measurement control unit 100 is stored in the storage unit 110. The storage unit 110 includes a display characteristic storage unit 111 and a color correction data storage unit 112.

  The display characteristic storage unit 111 stores data relating to the display characteristics of the display unit 120. In the display characteristic storage unit 111, for example, a display characteristic table and a measurement time table are stored. These tables are stored in advance for the operation of the display device 1.

  FIG. 3 is a diagram illustrating an example of the display characteristic table. The display characteristic table is measured for each RGB value of the input image signal input to the display device 1 when the display unit 120 displays the RGB value 1111 and no color correction based on the RGB value. Data associated with spectral data 1112 representing the spectral characteristics of light is stored. For example, the light emitted from the display unit 120 is measured when the display device 1 is manufactured, and the measurement result is reflected in the display characteristic table.

  FIG. 4 is a diagram illustrating an example of a measurement time table. In the measurement time table, for each wavelength of light emitted from the display unit 120, data in which the wavelength 1113 is associated with the measurement time 1114 for measuring the wavelength is stored. In the measurement time 1114, for example, the characteristics of the photo IC included in the light receiving unit 143 (for example, the time-series change in the amount of accumulated charge when light of a certain wavelength is applied) are measured. The time for appropriately measuring the luminance value of the light is set. For example, the characteristics of the light receiving unit 143 are inspected when the display device 1 is manufactured, and the inspection result is reflected in the measurement time table.

  Note that the measurement time 1114 set in the measurement time table is a time based on the characteristics of the light receiving unit 143. Accordingly, the measurement time of the wavelength (measurement wavelength) that is the actual measurement target is determined by “measurement time 1114 corresponding to the measurement wavelength” × “coefficient corresponding to the predicted light amount of the measurement wavelength”. The coefficient corresponding to the predicted light amount of the measurement wavelength can be determined according to the predicted light amount based on the spectrum data 1112 of the display characteristic table.

  Returning to FIG. The color correction data storage unit 112 stores color correction data used for color correction. The color correction data storage unit 112 stores, for example, a color correction table.

  FIG. 5 is a diagram illustrating an example of a color correction table. In the color correction table, for each input RGB value that is an RGB value of an input image signal input to the display device 1, an input RGB value 1121 and a desired target color are displayed on the display unit 120 with the input RGB value. Data that correlates the corrected output RGB value 1122 corrected in this manner is stored.

  In addition, the structure of each table of FIGS. 3-5 is an example, and is not restricted to the structure shown in figure.

  Returning to FIG. The measurement control unit 100 and the storage unit 110 can be realized by, for example, a controller board including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. That is, the measurement control unit 100 can be realized, for example, by loading a predetermined program stored in a ROM or the like into the RAM and executing it by the CPU. The storage unit 110 can be realized, for example, when the CPU uses RAM or ROM. Of course, at least a part of the functions of the measurement control unit 100 may be realized by a dedicated circuit.

  In addition, the structure of the display apparatus 1 is not restricted to said structure. Further, the configuration of a general display device is not excluded. The configuration of the display device 1 is classified according to the main processing contents in order to make the configuration of the display device 1 easy to understand. The present invention is not limited by the way of classification and names of the constituent elements. The configuration of the display device 1 can also be classified into more components depending on the processing content. Moreover, it can also classify | categorize so that one component may perform more processes. Further, the processing of each component may be executed by one hardware or may be executed by a plurality of hardware.

  Next, processing realized by the display device 1 will be described.

  FIG. 6 is a flowchart illustrating an example of processing for generating color correction data. The color correction data generation processing flow shown in FIG. 6 is performed when, for example, the measurement control unit 100 receives a color correction instruction from the user via the input device of the display device 1 (not shown) or from the information processing device 5. To begin.

  First, the color patch generation unit 101 generates a color patch (step S10). Specifically, the color patch generation unit 101 selects an unmeasured color patch pattern from a plurality of predetermined color patch patterns, and generates color patch image information of RGB values of the selected color patch pattern. To do.

  Then, the measurement condition setting unit 102 sets the measurement conditions for the color patch image (step S20). Specifically, the measurement condition setting unit 102 is associated with the RGB value 1111 that matches the RGB value of the color patch image information generated in step S10 from the display characteristic table (see FIG. 3) of the display characteristic storage unit 111. Spectrum data 1112 obtained. If there is no matching RGB value 1111, the measurement condition setting unit 102 may select the RGB value 1111 that is closest to the RGB value of the color patch image information. If there is no matching RGB value 1111, a plurality of RGB values 1111 (in a range satisfying a predetermined condition) close to the RGB values of the color patch image information are specified, and spectrum data 1112 associated with the specified plurality of RGB values 1111. The spectral data of the color patch image may be generated by executing the interpolation process based on the above.

  Further, the measurement condition setting unit 102 determines a measurement wavelength for actual measurement based on the acquired spectrum data representing the spectral characteristics. For example, the measurement condition setting unit 102 obtains the second derivative (second derivative spectrum curve) for the spectrum curve specified from the acquired spectrum data, and selects a predetermined number of wavelengths from the one with the higher absolute value of the second derivative. Then, it is determined as a measurement wavelength for actual measurement. For example, when the second derivative spectrum curve of the original spectrum curve shown in FIG. 7 (a diagram for explaining an example of the measurement wavelength determination method) is obtained, the wavelengths having a high absolute value of the second derivative are P1 to P7. It corresponds to the wavelength of the feature point. In this way, it is possible to improve the accuracy of the interpolation process particularly when calculating the spectrum curve showing the spectral characteristics in step S50 using the wavelength corresponding to the feature point of the spectrum curve as the actual measurement object. In addition, since the wavelength with more characteristics is preferentially set as the actual measurement object, the accuracy in calculating the spectral characteristics can be maintained.

  Of course, the method of determining the wavelength for actual measurement is not limited to the above. For example, instead of selecting a predetermined number of wavelengths, the measurement condition setting unit 102 may select a wavelength having a value exceeding a predetermined threshold among the absolute values of the second derivative of the spectrum curve. In this way, for example, even when there are many peaky parts in the spectrum, the wavelength is appropriately selected, and the accuracy of the interpolation process is particularly improved when calculating the spectrum curve showing the spectral characteristics in step S50. Can do.

  In addition, the measurement condition setting unit 102 measures the measurement wavelength associated with the matching wavelength 1113 for each measurement wavelength actually measured as described above from the measurement time table (see FIG. 4) of the display characteristic storage unit 111. Time 1114 is acquired. For each measurement wavelength, a coefficient corresponding to the light amount (luminance) of the measurement wavelength is determined based on the spectrum data 1112 acquired as described above. Then, for each measurement wavelength, the product of the acquired measurement time 1114 and the coefficient corresponding to the determined light amount is calculated and set as the measurement time of each measurement wavelength.

  Then, the color patch generation unit 101 displays the color patch (step S30). Specifically, the color patch generation unit 101 outputs the color patch image information generated in step S10 to the signal processing unit 130. The signal processing unit 130 outputs the input color patch image information to the display unit 120 without performing color correction.

  Then, the measurement control unit 100 measures the color patch (Step S40). Specifically, the measurement control unit 100 sends a drive control signal to the spectroscopic control unit 144 so that light of the measurement wavelength is transmitted by the spectroscopic unit 142 for each measurement wavelength actually measured in step S20. And a drive control signal is output to the light reception control unit 145 so that the electrical signal accumulated in the measurement time for the measurement wavelength is output from the light reception unit 143.

  Then, the spectral characteristic calculation unit 103 calculates the spectral characteristic (step S50). Specifically, the spectral characteristic calculation unit 103 calculates a spectral curve indicating the spectral characteristic of the color patch image displayed in step S30 based on the electrical signal output from the light receiving unit 143 for each measurement wavelength to be measured. The data indicating the spectral characteristics is output to the color value calculation unit 104. Note that when calculating the spectral characteristics, the spectral characteristic calculation unit 103 performs gain correction, interpolation processing in the wavelength direction, and the like on the luminance value of the light indicated by the obtained electrical signal of each measurement wavelength.

  Then, the color value calculation unit 104 calculates a color value (step S60). Specifically, the color value calculation unit 104 calculates the color value of the color patch image displayed in step S30 based on the data indicating the spectral characteristics output in step S50, and the data indicating the color value is calculated. The data is output to the color correction data generation unit 105.

  Then, the color patch generation unit 101 determines whether there is an unmeasured color patch (step S70). Specifically, the color patch generation unit 101 determines whether there is an unmeasured color patch pattern from a plurality of predetermined color patch patterns. When there is an unmeasured color patch pattern (step S70: Y), the color patch generation unit 101 returns the process to step S10. On the other hand, when there is no unmeasured color patch pattern (step S70: N), the color patch generation unit 101 advances the processing to step S80.

  Then, the color correction data generation unit 105 generates color correction data (step S80). That is, the color correction data generation unit 105 generates color correction data for causing the display unit 120 to display the color specified by the input image signal with a desired target color.

  FIG. 8 is a diagram illustrating an example of a method for generating color correction data. FIG. 8 shows a change in the output value (luminance) displayed on the display unit 120 with respect to the input value (RGB value) specified by the input image signal. The measured values in the figure are specified based on the luminance data calculated in step S60. The target value in the figure is predetermined as a desired target value and stored in the storage unit 110. Note that the target value may be stored in the storage unit 110 by the measurement control unit 100 receiving a setting by the user via an input device of the display device 1 (not shown) or from the information processing device 5. .

  The color correction data generation unit 105 calculates the input value Din ′ in the measurement value so as to match the output value Dout corresponding to the input value Din in the target value. That is, a correction parameter for correcting the input value Din ′ to be output when the input value is Din is calculated. Here, the input value Din ′ is used as a correction parameter. The color correction data generation unit 105 stores the input Din in the color correction table in association with the input RGB value 1121 and the input Din ′ as the output RGB value 1122. The color correction data generation unit 105 performs such processing for each input RGB value.

  The color correction data generation unit 105 generates color correction data as described above, and ends the color correction data generation processing flow shown in FIG.

  FIG. 9 is a flowchart illustrating an example of color correction processing. The color correction processing flow illustrated in FIG. 9 is started when, for example, the signal processing unit 130 receives an instruction to start image output from the information processing apparatus 5.

  The signal processing unit 130 determines whether there is an input of an image signal (step S110). If no image signal is input (step S110: N), the signal processing unit 130 continues the determination.

  When there is an input of an image signal (step S110: Y), the signal processing unit 130 performs color correction of the input image signal (step S120). Specifically, the signal processing unit 130 acquires an output RGB value 1122 associated with the input RGB value 1121 that matches the RGB value of the input image signal from the color correction table (see FIG. 5) of the color correction data storage unit 112. To do.

  Then, the signal processing unit 130 outputs the color-corrected image signal (Step S130), and returns the process to Step S110. Specifically, the signal processing unit 130 outputs the output RGB value 1122 acquired in step S120 to the display unit 120.

  Each processing unit of the flow shown in FIGS. 6 and 9 is divided according to main processing contents in order to make the processing of the display device 1 easy to understand. The present invention is not limited by the way of dividing the processing unit or the name. The processing of the display device 1 can be divided into more processing units according to the processing content. Moreover, it can also divide | segment so that one process unit may contain many processes.

  The first embodiment of the present invention has been described above. According to the first embodiment, when color measurement is performed using a Fabry-Perot spectroscope, the measurement time can be shortened while maintaining measurement accuracy. That is, in the first embodiment, a spectral characteristic of light emitted when a color patch is displayed is specified, and measurement using a spectroscope is performed based on the specified spectral characteristic. Therefore, measurement according to the color patch can be realized, and measurement time can be shortened while maintaining measurement accuracy.

<Second embodiment>
The first embodiment relates to a display device such as a liquid crystal display, but the second embodiment relates to a projection device that projects an image on a screen or a wall (may be called a “projector”). Since the characteristic processing is the same as that of the first embodiment, a brief description will be given centering on differences from the first embodiment.

  FIG. 10 is a diagram showing an example of a schematic configuration of the projection apparatus 2 according to the second embodiment of the present invention.

  The projection apparatus 2 includes a measurement control unit 200, a storage unit 210, a projection unit 220, a signal processing unit 230, and a spectroscopic sensor unit 140. Note that the measurement control unit 200, the storage unit 210, and the spectroscopic sensor unit 140 may be components as a colorimeter built in the projection apparatus 2.

  The projection unit 220 is, for example, a main part of an LCD projector, and includes a light source lamp, a dichroic mirror, a liquid crystal panel, a prism, a lens, and the like. The “projection unit” may be called an “output unit”.

  For example, when an image signal is input from the information processing device 5, the signal processing unit 230 corrects the color of the input image signal based on the color correction data stored in the color correction data storage unit 212, and the projection unit 220. Output to the LCD panel. When the image signal of the color patch image is input, the signal processing unit 230 outputs the image signal to the projection unit 220 without performing color correction. The signal processing unit 230 reads out the color correction data from the color correction data storage unit 212, stores the color correction data in its own storage device, and performs color correction using the color correction data in the storage device. Also good.

  The spectroscopic sensor unit 140 is basically the same as that of the first embodiment. In the second embodiment, for example, the spectroscopic sensor unit 140 can detect the light reflected from the image projected from the projection unit 220 onto the projection surface, for example, the position where the light guide unit 141 faces the projection surface, and Installed in the direction.

  For example, as shown in FIG. 14B (a diagram illustrating an example of an installation position of the spectral sensor unit 140 in the projection device 2), the spectral sensor unit 140 is exposed to the outside and faces the projection direction. As described above, the projector 2 is installed inside the projector 2. In addition, the light guide part 141 is comprised including a lens, for example.

  The measurement control unit 200 performs control related to the measurement of projection by the projection device 2. The measurement control unit 200 includes a color patch generation unit 201, a measurement condition setting unit 202, a spectral characteristic calculation unit 203, a color value calculation unit 204, and a color correction data generation unit 205.

  The color patch generation unit 201 generates one or more color patch images used for creating color correction data, and outputs them to the signal processing unit 230.

  The measurement condition setting unit 202 determines and sets measurement conditions (measurement wavelength, measurement time, etc.) for each color patch image based on the data relating to the projection characteristics of the projection unit 220 stored in the projection characteristic storage unit 211. . The measurement control unit 200 controls the spectroscopic sensor unit 140 based on the measurement conditions set by the measurement condition setting unit 202.

  The spectral characteristic calculation unit 203 is basically the same as the spectral characteristic calculation unit 103 of the first embodiment.

  The color value calculation unit 204 is basically the same as the color value calculation unit 104 of the first embodiment.

  The color correction data generation unit 205 is a color for causing the projection unit 220 to project the color specified by the input image signal with a desired target color based on the color value of each color patch output from the color value calculation unit 204. Correction data is generated and stored in the color correction data storage unit 212.

  The storage unit 210 includes a projection characteristic storage unit 211 and a color correction data storage unit 212. The projection characteristic storage unit 211 stores data regarding the projection characteristics of the projection unit 220. In the projection characteristic storage unit 211, for example, a projection characteristic table and a measurement time table are stored. The color correction data storage unit 212 stores, for example, a color correction table.

  In the projection characteristic table, for each RGB value of the input image signal input to the projection device 2, the RGB value and the light measured when projected from the projection unit 220 without color correction based on the RGB value are displayed. Data associated with spectral data representing spectral characteristics is stored. Note that, for example, the light projected from the projection unit 220 is measured when the projection apparatus 2 is manufactured, and the measurement result is reflected in the projection characteristic table.

  In the measurement time table, for each wavelength of light projected by the projection unit 220, data in which the wavelength is associated with the measurement time for measuring the wavelength is stored. For the measurement time, for example, the time for appropriately measuring the luminance value of the light having the wavelength to be measured is set in consideration of the characteristics of the photo IC included in the light receiving unit 143. For example, the characteristics of the light receiving unit 143 are inspected when the projection apparatus 2 is manufactured, and the inspection result is reflected in the measurement time table.

  Note that, as in the first embodiment, the measurement time set in the measurement time table is a time based on the characteristics of the light receiving unit 143. Therefore, the measurement time of the wavelength (measurement wavelength) that is the actual measurement target is determined by “measurement time corresponding to the measurement wavelength” × “coefficient corresponding to the predicted light amount of the measurement wavelength”. A coefficient corresponding to the predicted light amount of the measurement wavelength can be determined according to the predicted light amount based on the spectrum data of the projection characteristic table.

  In the color correction table, for each input RGB value that is an RGB value of the input image signal input to the projection device 2, the input RGB value and a desired target color are projected from the projection unit 220 with the input RGB value. Is stored in association with the corrected output RGB values.

  The second embodiment of the present invention has been described above. According to the second embodiment, when performing color measurement using a spectroscope such as a Fabry-Perot method, the spectral characteristic of light emitted when a color patch is projected is specified, and the specified spectral characteristic Based on the above, measurement by a spectroscope is performed. Therefore, measurement according to the color patch can be realized, and measurement time can be shortened while maintaining measurement accuracy.

<Third embodiment>
The first embodiment and the second embodiment relate to an apparatus that emits light when displayed or projected by the apparatus itself. The third embodiment relates to a printing apparatus that prints an image on a print medium such as paper. A brief description will be given centering on differences from the first embodiment.

  FIG. 11 is a diagram illustrating an example of a schematic configuration of the printing apparatus 3 according to the third embodiment of the present invention.

  The printing apparatus 3 prints a color chart image, irradiates light on the printed color chart image, disperses the reflected light with a spectroscopic sensor, and detects the luminance value of the light having the dispersed wavelength. Further, based on the detected luminance of each wavelength, color correction data used when the printing apparatus 3 performs printing based on the input image data is generated. The printing apparatus 3 corrects the input image data using the generated color correction data and performs printing.

  In the third embodiment, for easy understanding, it is assumed that the print data (input image data) received by the printing apparatus 3 from the information processing apparatus 5 is, for example, CMYK color print data. Of course, the printing apparatus 3 may receive the RGB color print data and convert the print data into CMYK color print data by referring to an LUT (Look Up Table).

  The printing apparatus 3 includes a measurement control unit 300, a storage unit 310, a printing unit 320, a communication unit 330, a print control unit 340, and a spectroscopic sensor unit 140. Note that the measurement control unit 300, the storage unit 310, and the spectroscopic sensor unit 140 may be components as a colorimeter built in the printing apparatus 3.

  The printing unit 320 is, for example, a print engine unit such as an inkjet method, and includes an ink cartridge, a print head, a carriage, a paper feed mechanism, and the like. Of course, the printing method is not limited to the ink jet method, and may be a laser method, for example. The “printing unit” may be called an “output unit”.

  For example, the communication unit 330 receives print data from the information processing apparatus 5 and outputs the print data to the measurement control unit 300 or the storage unit 310.

  The print control unit 340 controls printing by the printing unit 320. Note that both the “print control unit” and the “print unit” may be referred to as “output unit”.

  For example, when print data is input from the communication unit 330, the print control unit 340 corrects the color of the print data based on the color correction data stored in the color correction data storage unit 312, and based on the print data. Then, data for executing printing by the printing unit 320 is generated and output to the printing unit 320. Note that the print control unit 340 reads the color correction data from the color correction data storage unit 312 and stores it in its own storage device, and performs color correction using the color correction data in the storage device. Also good. The “print control unit” may be referred to as a “color correction processing unit”.

  Further, for example, when printing a color chart image, the print control unit 340 generates data for performing printing by the printing unit 320 based on the color chart image without performing color correction, and sends the data to the printing unit 320. Output.

  The spectroscopic sensor unit 140 is basically the same as that of the first embodiment. However, in the third embodiment, for example, the spectroscopic sensor unit 140 can detect the light reflected from the image printed on the print medium by the printing unit 320, for example, the position where the light guide unit 141 faces the printing surface, and Installed in the direction.

  Further, the spectroscopic sensor unit 140 includes a light source unit 146 and a light source control unit 147 in order to detect light of an image printed on the print medium.

  For example, as shown in FIG. 14C (a diagram illustrating an example of the installation position of the spectral sensor unit 140 in the printing apparatus 3), the spectral sensor unit 140 is arranged such that the light guide unit 141 faces the printing surface of the print medium S. Installed inside the printing apparatus 3. In addition, the light guide part 141 is comprised including an opening part, for example. The light emitted from the light source unit 146 strikes the print medium S through the light guide unit 141.

  The light source unit 146 is a light source that emits white light such as a white LED. The light source unit 146 turns on / off lighting based on the drive control signal output from the light source control unit 147.

  The light source control unit 147 is a drive circuit that controls the light source unit 146. When the drive control signal is input from the measurement control unit 300, the light source control unit 147 outputs the drive control signal to the light source unit 146. Accordingly, the light source unit 146 emits white light during the designated lighting time.

  The measurement control unit 300 performs control related to the measurement of the printing result by the printing apparatus 3. The measurement control unit 300 includes a color chart generation unit 301, a measurement condition setting unit 302, a spectral characteristic calculation unit 303, a color value calculation unit 304, and a color correction data generation unit 305.

  The color chart generation unit 301 generates color chart image information (which may be referred to as “color image information”) including one or more color patches used for generating color correction data, and outputs the color chart image information to the print control unit 340. . Note that the print control unit 340 generates data for executing printing by the printing unit 320 based on the generated color chart image information, and outputs the data to the printing unit 320.

  The measurement condition setting unit 302 is configured to measure the measurement conditions (measurement wavelength, measurement time, etc.) for each color patch image included in the color chart image based on the data relating to the printing characteristics of the printing unit 320 stored in the printing characteristic storage unit 311. Determine and set.

  The print control unit 340 controls the printing unit 320 so that the spectroscopic sensor unit 140 can detect light reflected from each color patch image included in the printed color chart image when performing the measurement. For example, the position of the print medium in the paper feeding direction is adjusted. The measurement control unit 300 controls the spectroscopic sensor unit 140 based on the measurement conditions set by the measurement condition setting unit 302. That is, the measurement control unit 300 outputs a drive control signal to the light source control unit 147 so that light is emitted to each color patch image included in the color chart image on the printing surface. In addition, the measurement control unit 300 outputs a drive control signal to the spectroscopic control unit 144 so that the light of the set measurement wavelength is transmitted by the spectroscopic unit 142, and the electric power of the accumulated light for the set measurement time. A drive control signal is output to the light reception control unit 145 so that the signal is output from the light reception unit 143.

  The spectral characteristic calculation unit 303 is basically the same as the spectral characteristic calculation unit 103 of the first embodiment.

  The color value calculation unit 304 is basically the same as the color value calculation unit 104 of the first embodiment.

  The color correction data generation unit 305 prints the color specified by the input image data with a desired target color based on the color value of each color patch image included in the color chart output from the color value calculation unit 304. Thus, color correction data for printing is generated and stored in the color correction data storage unit 312.

  The storage unit 310 includes a print characteristic storage unit 311 and a color correction data storage unit 312. The print characteristic storage unit 311 stores data relating to the print characteristics of the printing unit 320. The print characteristic storage unit 311 stores, for example, a print characteristic table and a measurement time table. The color correction data storage unit 312 stores, for example, a color correction table.

  In the print characteristic table, for each CMYK value of the input image data input to the printing apparatus 3, the CMYK value and the light measured for the image printed by the printing unit 320 without color correction based on the CMYK value are displayed. Data associated with spectral data representing spectral characteristics is stored. For example, when the printing apparatus 3 is manufactured, the light of the image printed by the printing unit 320 is measured, and the measurement result is reflected in the print characteristic table.

  In the measurement time table, for each wavelength of light of an image printed by the printing unit 320, data that associates the wavelength with the measurement time for measuring the wavelength is stored. As the measurement time, for example, a time for appropriately measuring the luminance of the light having the wavelength to be measured is set in consideration of the characteristics of the photo IC included in the light receiving unit 143. The lighting time for turning on the light source unit 146 may be stored together with the measurement time of each wavelength. For example, the characteristics of the light receiving unit 143 are inspected when the printing apparatus 3 is manufactured, and the inspection result is reflected in the measurement time table.

  Note that, as in the first embodiment, the measurement time set in the measurement time table is a time based on the characteristics of the light receiving unit 143. Therefore, the measurement time of the wavelength (measurement wavelength) that is the actual measurement target is determined by “measurement time corresponding to the measurement wavelength” × “coefficient corresponding to the predicted light amount of the measurement wavelength”. The coefficient corresponding to the predicted light amount of the measurement wavelength can be determined according to the predicted light amount based on the spectrum data of the print characteristic table.

  In the color correction table, for each input CMYK value that is a CMYK value of input image data input to the printing apparatus 3, an input CMYK value and a desired target color are printed by the printing unit 320 using the input CMYK value. Is stored in association with the corrected output CMYK value.

  FIG. 12 is a flowchart illustrating an example of processing for generating color correction data. In the color correction data generation processing flow shown in FIG. 12, for example, the measurement control unit 300 receives a color correction instruction from the user via the input device of the printing device 3 (not shown) or from the information processing device 5. To begin.

  First, the color chart generation unit 301 generates a color chart (step S210). Specifically, the color chart generation unit 301 selects an unmeasured color chart pattern from a plurality of predetermined color chart patterns, and generates color chart image information of CMYK values of the selected color chart pattern. To do. Here, it is assumed that the generated color chart image information includes one color patch image information.

  Then, the measurement condition setting unit 302 sets the measurement conditions for the color chart image (step S220). Specifically, the measurement condition setting unit 302 acquires spectrum data associated with the CMYK value that matches the CMYK value of the color chart image information generated in step S210 from the print characteristic table of the print characteristic storage unit 311. . When there is no matching CMYK value, the measurement condition setting unit 302 may select the CMYK value closest to the CMYK value of the color chart image information. If there is no matching CMYK value, a plurality of CMYK values (in a range satisfying a predetermined condition) that are close to the CMYK values of the color chart image information are specified, and interpolation is performed based on spectrum data associated with the specified CMYK values. You may make it produce | generate the spectrum data of a color chart image by performing a process. Since the method for determining the measurement wavelength for actual measurement and the method for determining the measurement time for each determined measurement wavelength based on the acquired spectrum data are the same as those in the first embodiment, description thereof will be omitted.

  Then, the color chart generation unit 301 prints the color chart (step S230). Specifically, the print control unit 340 generates data for executing printing by the printing unit 320 based on the color chart image information generated in step S <b> 210 and outputs the data to the printing unit 320. Note that the print control unit 340 does not perform color correction on the color chart image information when printing a color chart image. In this way, the print control unit 340 causes the printing unit 320 to print the color chart.

  Then, the measurement control unit 300 measures the color chart (Step S240). Specifically, the print control unit 340 controls the printing unit 320 so that the light reflected from the color chart image printed in step S230 can be detected by the spectroscopic sensor unit 140, for example, the paper of the printing medium. Adjust the position in the feed direction. Then, the measurement control unit 300 outputs a drive control signal to the light source control unit 147 so that light is emitted to the color chart image on the printing surface. In addition, the measurement control unit 300 outputs a drive control signal to the spectroscopic control unit 144 so that light of the measurement wavelength is transmitted by the spectroscopic unit 142 for each measurement wavelength actually measured set in step S220. At the same time, a drive control signal is output to the light reception control unit 145 so that the electrical signal accumulated in the measurement time for the measurement wavelength is output from the light reception unit 143.

  Then, the spectral characteristic calculation unit 303 calculates the spectral characteristic (step S250). Specifically, the spectral characteristic calculation unit 303 calculates a spectral curve indicating the spectral characteristics of the color chart image printed in step S230 based on the electrical signal output from the light receiving unit 143 for each measurement wavelength to be measured. Then, data indicating spectral characteristics is output to the color value calculation unit 304. Note that when calculating the spectral characteristics, the spectral characteristic calculation unit 303 performs gain correction, interpolation processing in the wavelength direction, and the like for the luminance indicated by the obtained electrical signal of each measurement wavelength.

  Then, the color value calculation unit 304 calculates a color value (step S260). Specifically, the color value calculation unit 304 calculates the color value of the color chart image printed in step S230 based on the data indicating the spectral characteristics output in step S250, and the data indicating the color value is The data is output to the color correction data generation unit 305.

  Then, the color chart generation unit 301 determines whether there is an unmeasured color chart (step S270). Specifically, the color chart generation unit 301 determines whether there is an unmeasured color chart pattern from among a plurality of predetermined color chart patterns. When there is an unmeasured color chart pattern (step S270: Y), the color chart generation unit 301 returns the process to step S210. On the other hand, when there is no unmeasured color chart pattern (step S270: N), the color chart generation unit 301 advances the process to step S280.

  Then, the color correction data generation unit 305 generates color correction data (step S280). That is, the color correction data generation unit 305 generates color correction data for causing the printing unit 320 to print the color specified by the input image data with a desired target color. A specific method for generating color correction data is basically the same as that in the first embodiment, but will be described with reference to FIG.

  In the third embodiment, FIG. 8 represents a change in an output value (reflectance) printed by the printing unit 320 with respect to an input value (CMYK value) specified by input image data. The measured values in the figure are specified based on the reflectance data calculated in step S260. The target value in the figure is predetermined as a desired target value and stored in the storage unit 310. Note that the target value may be stored in the storage unit 310 by the measurement control unit 300 via the input device of the printing device 3 (not shown) or from the information processing device 5 and received by the user. .

  The color correction data generation unit 305 calculates the input value Din ′ in the measurement value so that it matches the output value Dout corresponding to the input value Din in the target value. That is, a correction parameter for correcting the input value Din ′ to be output when the input value is Din is calculated. Here, the input value Din ′ is used as a correction parameter. The color correction data generation unit 305 associates the input Din with the input CMYK value and associates the input Din ′ with the output CMYK value and stores them in the color correction table. The color correction data generation unit 305 performs such processing for each input CMYK value. It should be noted that interpolation processing is performed on CMYK values (output CMYK values) necessary for realizing a target color corresponding to a certain input CMYK value, based on color values that are measurement results of a plurality of other input CMYK values. You may make it obtain | require by this.

  The color correction data generation unit 305 generates color correction data as described above, and ends the color correction data generation processing flow shown in FIG.

  FIG. 13 is a flowchart illustrating an example of color correction processing. The color correction process flow illustrated in FIG. 13 is started when the print control unit 340 receives an instruction to start printing from the information processing apparatus 5, for example.

  The print control unit 340 determines whether print data has been received via the communication unit 330 (step S310). If the print data has not been received (step S310: N), the print control unit 340 continues the determination.

  If print data has been received (step S310: Y), the print control unit 340 performs color correction on the received print data (step S320). Specifically, the print control unit 340 acquires an output CMYK value associated with the input CMYK value that matches the CMYK value of the input image data (print data) from the color correction table of the color correction data storage unit 312.

  Then, the print control unit 340 generates data for executing printing by the printing unit 320 based on the print data after the color correction, outputs the data to the printing unit 320 (step S330), and returns the process to step S310. In this way, the print control unit 340 causes the printing unit 320 to print the print data.

  In the third embodiment, the CMYK value of the input image data is corrected using the color correction data. However, the present invention is not limited to such a method. For example, when the printing apparatus 3 uses an LUT that associates RGB values and CMYK values, the output CMYK values of the color correction data may be reflected in the LUT. In this way, when receiving the RGB color print data, the printing apparatus 3 can generate the color-corrected CMYK color print data by referring to the LUT and execute printing. .

  In the third embodiment, printing and measurement are performed for each color chart image including one color patch image. However, a color chart image including a plurality of color patch images is printed on, for example, one page, and then, Measurement may be performed for each color patch image.

  The third embodiment of the present invention has been described above. According to the third embodiment, when performing color measurement using a spectroscope such as a Fabry-Perot method, the spectral characteristic of light emitted from a printed color chart is specified, and based on the specified spectral characteristic Thus, measurement by a spectroscope is performed. Therefore, measurement according to the color chart can be realized, and measurement time can be shortened while maintaining measurement accuracy.

  In addition, the 1st-3rd embodiment of the above this invention intends to illustrate the summary and scope of this invention, and does not limit it. Many alternatives, modifications, and variations will be apparent to those skilled in the art.

  For example, the display device 1 according to the first embodiment outputs the color value data calculated by the color value calculation unit 104 to a connected device such as the information processing device 5 as profile information such as an ICC profile. Also good. Since the profile information is often required to have higher accuracy than the color correction data used for calibration or the like, the display device 1 may increase the number of color patches (number of measurement colors) and the number of measurement wavelengths. Similarly, the projection device 2 of the second embodiment and the printing device 3 of the third embodiment output the calculated color value data as profile information to a connected device such as the information processing device 5. Also good. In this way, in the generation of profile information such as an ICC profile, the measurement time can be shortened while maintaining measurement accuracy. Note that the function of outputting profile information may be called a “profile output unit”.

  For example, in the first to third embodiments, the measurement wavelength to be actually measured is determined from the spectrum data of the display characteristic table (projection specification table in the second embodiment, print characteristic table in the third embodiment). However, the actual measurement wavelength may be set instead of the spectrum data in the display characteristic table. In this case, the measurement condition setting unit sets the measurement wavelength in the display characteristic table as it is as the measurement condition. In this way, it is possible to omit the secondary differential calculation process and the like.

  For example, in the first embodiment, the measurement control unit 100 and the storage unit 110 are realized in the display device 1, but these functions are realized by the CPU executing a predetermined program in the information processing device 5. May be. In this case, for example, the signal processing unit 130 transmits and receives information between the information processing apparatus 5 and the spectroscopic sensor unit 140. Similarly, in the second embodiment, the measurement control unit 200 and the storage unit 210 are realized in the projection apparatus 2, but these functions are performed by the CPU executing a predetermined program in the information processing apparatus 5. It may be realized. Similarly, in the third embodiment, the measurement control unit 300 and the storage unit 310 are realized in the printing apparatus 3, but these functions are performed by the CPU executing a predetermined program in the information processing apparatus 5. It may be realized.

  For example, in the first to third embodiments, the measurement control unit 100, the storage unit 110, and the spectroscopic sensor unit 140 are realized in a measurement target device (display device, projection device, printing device). It may be realized as a colorimeter separate from the target device.

  In the first to third embodiments, a Fabry-Perot spectroscope is used, but the present invention is not limited to this method as long as it has a similar function. For example, the spectroscope may include a plurality of etalons that transmit a specific wavelength and have a mechanism for mechanically switching these etalons.

  The present invention can be applied to all image processing apparatuses such as a display apparatus having a light source device and a projection apparatus, and a printing apparatus having no light source apparatus.

1: display device, 5: information processing device, 100: measurement control unit, 101: color patch generation unit, 102: measurement condition setting unit, 103: spectral characteristic calculation unit, 104: color value calculation unit, 105: color correction data Generation unit, 110: storage unit, 111: display characteristic storage unit, 112: color correction data storage unit, 120: display unit, 130: signal processing unit, 140: spectral sensor unit, 141: light guide unit, 142: spectral unit 143: light receiving unit, 144: spectral control unit, 145: light receiving control unit,
2: projection device, 200: measurement control unit, 201: color patch generation unit, 202: measurement condition setting unit, 203: spectral characteristic calculation unit, 204: color value calculation unit, 205: color correction data generation unit, 210: storage Unit 211: projection characteristic storage unit 212: color correction data storage unit 220: projection unit 230: signal processing unit
3: printing apparatus, 300: measurement control unit, 301: color chart generation unit, 302: measurement condition setting unit, 303: spectral characteristic calculation unit, 304: color value calculation unit, 305: color correction data generation unit, 310: storage 311: Print characteristic storage unit 312: Color correction data storage unit 320: Printing unit 330: Communication unit 340: Print control unit 146: Light source unit 147: Light source control unit
1111: RGB value, 1112: Spectrum data, 1113: Wavelength, 1114: Measurement time, 1121: Input RGB value, 1122: Output RGB value,
1421: fixed substrate, 1422: movable substrate, 1423: fixed reflective film, 1424: movable reflective film, 1425: electrostatic actuator, 1425a: first electrode, 1425b: second electrode, 1426: electrode forming groove

Claims (9)

A spectroscopic sensor section;
A color patch generation unit that generates color patch image information of a color patch image output from the image processing apparatus;
Based on information indicating spectral characteristics when the color patch image is output by the image processing device based on the color patch image information, the wavelength of light to be measured by the spectral sensor unit is selected and the selected A measurement condition setting unit for determining a measurement time of each light wavelength, and setting the wavelength of the light and the measurement time as measurement conditions;
A measurement control unit for controlling measurement by the spectral sensor unit of the color patch image output from the image processing device based on the color patch image information based on the set measurement condition;
Based on the wavelength data of each light measured by the spectroscopic sensor unit, a calculation unit that calculates the spectral characteristics and color values of the output of the image processing device;
A colorimeter characterized by comprising: The colorimeter according to claim 1, wherein
The measurement condition setting unit, based on information indicating the spectral characteristic when the color patch image is output by the image processing device, determines the wavelength of light that is a characteristic point of the spectral characteristic by the spectral sensor unit. Select as the wavelength of the light to be measured,
A colorimeter characterized by that. The colorimeter according to claim 2, wherein
The measurement condition setting unit obtains a second derivative of the spectral characteristic based on information indicating the spectral characteristic when the color patch image is output by the image processing apparatus, and starts from a higher second derivative value. A predetermined number of wavelengths of light are determined as the feature points;
A colorimeter characterized by that. The colorimeter according to claim 2, wherein
The measurement condition setting unit obtains a second derivative of the spectral characteristic based on information indicating the spectral characteristic when the color patch image is output by the image processing apparatus, and the second derivative has a predetermined threshold value. A wavelength of light exceeding is determined as the feature point;
A colorimeter characterized by that. It is a colorimeter as described in any one of Claims 1-4,
A color correction information generation unit that generates color correction information used for color correction processing when the image processing apparatus outputs an image based on the color value calculated by the calculation unit;
A colorimeter comprising: An image processing apparatus comprising the colorimeter according to claim 5,
An output unit for outputting the color patch image and the image;
A color correction processing unit that performs color correction processing based on the color correction information when outputting the image;
An image processing apparatus comprising: An image processing apparatus comprising the colorimeter according to claim 5,
A profile output unit that outputs the color value calculated by the calculation unit as profile information;
An image processing apparatus comprising: The image processing apparatus according to claim 6 or 7,
A display device, a projection device, or a printing device,
An image processing apparatus. A color measurement method for measuring output characteristics of an image processing apparatus using a spectroscopic sensor unit,
A color patch generation step of generating color patch image information of a color patch image output from the image processing device;
Based on information indicating spectral characteristics when the color patch image is output by the image processing device based on the color patch image information, the wavelength of light to be measured by the spectral sensor unit is selected and the selected A measurement condition setting step for determining a measurement time of each light wavelength, and setting the wavelength of the light and the measurement time as measurement conditions;
A measurement control step for controlling measurement by the spectral sensor unit of the color patch image output from the image processing device based on the color patch image information based on the set measurement condition;
A calculation step of calculating spectral characteristics and color values of the output of the image processing device based on the wavelength data of each light measured by the spectral sensor unit;
A colorimetric method comprising:

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