WO2020179629A1 - Système d'étalonnage, dispositif d'étalonnage et programme - Google Patents

Système d'étalonnage, dispositif d'étalonnage et programme Download PDF

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Publication number
WO2020179629A1
WO2020179629A1 PCT/JP2020/008081 JP2020008081W WO2020179629A1 WO 2020179629 A1 WO2020179629 A1 WO 2020179629A1 JP 2020008081 W JP2020008081 W JP 2020008081W WO 2020179629 A1 WO2020179629 A1 WO 2020179629A1
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Prior art keywords
measurement
combination
correction coefficient
color
spectral
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PCT/JP2020/008081
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English (en)
Japanese (ja)
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浩大 永井
聡史 出石
幹夫 上松
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コニカミノルタ株式会社
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Priority to JP2021504026A priority Critical patent/JP7459863B2/ja
Priority to CN202080017772.XA priority patent/CN113518903B/zh
Publication of WO2020179629A1 publication Critical patent/WO2020179629A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors

Definitions

  • the present invention relates to a calibration system, a calibration device, and a program used for calibrating a stimulus-type colorimeter including at least three color channels.
  • a stimulus value type measurement in which a sensor receives light whose wavelength is selected by an optical filter, such as a color luminance meter having a spectral responsivity similar to a color matching function, and the stimulus value according to the light intensity is used as the measurement value.
  • the color apparatus has a measurement error due to a difference between the spectral response of the colorimeter formed by the spectral characteristics of the optical filter or the sensor and the target spectral response such as a color matching function.
  • a coefficient for correcting the measured value as shown in the following formula (1) is calculated, and the measured value is calculated by the correction coefficient.
  • a correction technique is known (for example, Patent Document 1 and Patent Document 2).
  • P * S * CM1 P * CMF (1)
  • P is a matrix that is the individual spectral values of the emission spectrum of the target light source
  • S is a matrix that is the individual spectral values of the spectral sensitivity of the filter of the measuring instrument
  • CMF is the standard defined by CIE1931.
  • a matrix that is each spectrum value of the spectrum evaluation function of, CM1 represents a calibration matrix (correction coefficient).
  • the spectral radiation characteristic (spectral data) of the measurement target is measured by a color measurement device (also referred to as a spectrophotometer) by a spectrocolorimetry method, and the stimulation value type
  • the spectral responsivity of the color measuring device is measured in advance.
  • the correction coefficient CM1 is calculated from the spectral responsivity of the filter measuring instrument and the spectral radiation characteristic of the measurement object, and the actual measurement value of the filter measuring instrument is corrected by the correction coefficient to obtain a correct measurement value.
  • Patent Documents 1 and 2 do not consider a combination of a spectroscopic measuring device that measures the spectral radiation characteristic of a measurement target and a filter measuring device that uses an optical filter. Further, the spectral radiation characteristic of the measurement target depends on the measurement position, the measurement angle, and the like. That is, the correction coefficient CM1 exists for each of a plurality of combinations including the spectral radiation characteristics of the reference object to be measured, the filter measuring device, and various parameters that cause errors. Therefore, in order to calculate an appropriate correction coefficient CM1 and perform highly accurate calibration, it is necessary to select an optimum combination from a plurality of combinations. Not shown.
  • the measurement object or the spectroscopy measurement device will be changed. Spectral radiation characteristics and the like must be measured every time, which is inefficient and requires time for calibration work.
  • the present invention has been made in view of such a technical background, and when measuring an object to be measured with a stimulus value type colorimeter including at least three color channels, different measurement conditions are used. Another object of the present invention is to provide a calibration system, a calibration device, and a program that can perform highly accurate calibration easily and efficiently.
  • the first color measuring device is used when calibrating a storage means that stores a plurality of combination information in which radiation characteristics are associated and combined in advance and the first color measuring device that has measured a measurement object.
  • the optimum combination of the first color measuring device, the object to be measured, and the spectral radiation characteristics of the object to be measured is obtained.
  • Discrimination means for discriminating from among the plurality of combination information stored in the storage means, spectral radiation characteristics of the measurement object included in the combination discriminated by the discrimination means, and the measurement result A calibration system including: a calibration unit that corrects a measurement value obtained by the first color measurement device based on a spectral responsivity of the first color measurement device. (2) The calibration system according to item 1, wherein the combination information is stored in advance in the storage unit as a table.
  • Each combination in the combination information includes information for specifying the measurement position, and the discrimination means determines the optimum combination based on the measurement position of the first color measuring device used for the measurement.
  • Each combination in the combination information includes information for specifying the measurement angle, and the discrimination means determines the optimum combination based on the measurement angle of the first color measuring device used for the measurement.
  • Each combination in the combination information includes information on the measurement environment, and the discrimination means determines the optimum combination based on the measurement environment of the first color measuring device used for the measurement.
  • the calibration system according to any one of 4.
  • the determination unit determines the spectral emission characteristic. 6.
  • the storage unit stores an initial value table of weights for determining a combination of measurement objects having similar spectral radiation characteristics.
  • a correction coefficient based on the spectral radiation characteristic of the measurement object and the spectral responsivity of the first color measurement device used for measurement is set as a first correction coefficient, and a measurement value by the first measurement device is set as a first correction coefficient.
  • the correction coefficient for calibrating to the value obtained by the measuring device 2 is the second correction coefficient and the correction coefficient for associating the first correction coefficient with the second correction coefficient is the third correction coefficient.
  • the combination stored in the storage means includes the third correction coefficient, and the calibration means calculates the first correction coefficient, and the calculated first correction coefficient, and The second correction coefficient is calculated from the third correction coefficient included in the combination determined by the determination means, and the measured value is corrected using the calculated second correction coefficient.
  • the calibration system according to any one of 8.
  • the first color measuring device is used when calibrating a storage means that stores a plurality of combination information in which radiation characteristics are associated and combined in advance and the first color measuring device that has measured a measurement object.
  • a calibration device comprising: a calibration unit that corrects a measurement value obtained by the first color measurement device based on a spectral responsivity of the first color measurement device.
  • One or a plurality of first identification information for specifying one or a plurality of stimulus value type first color measuring devices each including at least three color channels, and one or a plurality of them.
  • One or a plurality of second identification information for specifying one measurement object, and the spectrum of the measurement object measured by the second color measurement device by one or a plurality of spectrocolorimetry methods can communicate with an external database device having a storage means for pre-storing a plurality of combined information in association with each other, and the calibration of the first color measuring device that has measured the measurement object can be performed.
  • the first color measuring device, the measuring object, and the measuring object that have been measured based on the first identification information of the first color measuring device and the second identification information of the measurement object are measured.
  • Discriminating means for discriminating the optimum combination of spectral radiation characteristics of the objects from among the plurality of combination information stored in the storage means, and the measuring object contained in the combination discriminated by the discriminating means.
  • a calibration device including a calibration means for correcting a measured value by the first color measuring device based on the spectral radiation characteristics of the above and the spectral response of the first color measuring device in which the measurement is performed.
  • Each combination in the combination information includes information for specifying the measurement position, and the discrimination means determines the optimum combination based on the measurement position of the first color measuring device used for the measurement.
  • the calibrator according to any one of 13 to 15.
  • Each combination in the combination information includes information for specifying the measurement angle, and the discriminating means determines the optimum combination based on the measurement angle of the first color measuring device used for the measurement.
  • the calibration device according to any one of 13 to 16.
  • Each combination in the combination information includes information on the measurement environment, and the determination means determines the optimum combination based on the measurement environment of the first color measuring device used for the measurement.
  • the calibrator according to any one of 17.
  • the determination means determines the spectral emission characteristic. 19.
  • the calibration device according to any one of items 13 to 18 above, which determines a combination of measurement objects that are similar to each other from the combination information.
  • the calibration device (20) The calibration device according to item 19, wherein the storage means stores an initial value table of weights for discriminating a combination of measurement objects having similar spectral radiation characteristics.
  • the calibration device (20) The calibration device according to the above item 19 or 20, wherein a user can input an evaluation of the combination determined by the determination means.
  • a correction coefficient based on the spectral radiation characteristic of the measurement object and the spectral responsivity of the first color measurement device used for measurement is set as a first correction coefficient, and a measurement value by the first measurement device is set as a first correction coefficient.
  • the correction coefficient for calibrating to the value obtained by the measuring device 2 is the second correction coefficient and the correction coefficient for associating the first correction coefficient with the second correction coefficient is the third correction coefficient.
  • the combination stored in the storage means includes the third correction coefficient, and the calibration means calculates the first correction coefficient, and the calculated first correction coefficient, and The second correction coefficient is calculated from the third correction coefficient included in the combination determined by the determination means, and the measured value is corrected using the calculated second correction coefficient.
  • 21. The calibrator according to any one of 21.
  • (23) The calibration device according to any one of items 13 to 22, wherein the spectral responsivity of the first color measurement device is stored in the first color measurement device.
  • the third identification information for identifying the second colorimetric device is combined with the first identification information, the second identification information, and the spectral radiation characteristic in association with each other.
  • the calibrator according to any one of the preceding paragraphs 13 to 24.
  • One or a plurality of first identification information for specifying one or a plurality of stimulus value type first color measuring devices each including at least three color channels, and one or a plurality of them.
  • One or a plurality of second identification information for specifying one measurement object, and the spectrum of the measurement object measured by the second color measurement device by one or a plurality of spectrocolorimetry methods.
  • the computer of the calibrating device When calibrating the first color measuring device in which the measurement object is measured, the computer of the calibrating device provided with the storage means for storing a plurality of combination information in which the radiation characteristics are associated and combined in advance is used. Based on the first identification information of the first color measurement device and the second identification information of the measurement target, the first color measurement device that performed the measurement, the measurement target, and the spectral emission of the measurement target A determination step of determining an optimum combination of characteristics from among the plurality of combination information stored in the storage means, and a spectral radiation characteristic of the measurement target included in the combination determined by the determination step. And a calibration step of correcting a measurement value by the first color measurement device based on the spectral responsivity of the first color measurement device that has performed the measurement.
  • the first colorimetric measurement is performed on a computer of a calibration device that is capable of communicating with an external database device that includes a storage unit that stores in advance a plurality of pieces of combination information whose emission characteristics are associated with each other.
  • the first color measuring device and the measuring object are measured based on the first identification information of the first color measuring device and the second identification information of the measurement object.
  • one or more for specifying one or more stimulus value type first colorimetric devices including at least three color channels, respectively.
  • Individual first identification information, one or more second identification information for identifying one or more measurement objects, each spectral responsivity of the first color measuring device, and A plurality of pieces of combination information in which the spectral radiation characteristics of the measurement target measured by the second colorimetric apparatus using one or a plurality of spectrocolorimetric methods are associated and combined are stored in advance in the storage unit. Then, when calibrating the first color measurement device that has measured the measurement target, the measurement is performed based on the first identification information of the first color measurement device and the second identification information of the measurement target.
  • the optimum combination of the first colorimetric device, the measurement object, and the spectral emission characteristic of the measurement object that has been determined is determined from among the plurality of combination information stored in the storage unit, and the determined combination is determined.
  • the value measured by the first color measuring device is corrected based on the spectral radiation characteristics of the included object to be measured and the spectral response of the first color measuring device in which the measurement is performed.
  • the optimum combination corresponding to the first color measuring device actually used and the measurement object is selected from the plurality of combinations stored in advance in the storage means, and is included in the selected combination. Since the spectrophotometric characteristics are used for calibration of the first colorimeter, even if the first colorimeter used for measurement or the object to be measured changes, highly accurate calibration adapted to the conditions can be easily performed. be able to. In addition, it is not necessary to measure the spectral radiation characteristics of the measurement object and the spectral response of the filter measuring instrument each time calibration is performed, and it is not necessary to calculate the correction coefficient from the measurement results. it can.
  • the discriminating means can discriminate the optimum combination from the table of combination information stored in the storage means.
  • the optimum combination can be determined in consideration of the measurement position of the first measuring device, so that more accurate calibration can be performed. it can.
  • the optimum combination can be determined in consideration of the measurement angle of the first measuring device, so that more accurate calibration can be performed. it can.
  • the optimum combination can be determined in consideration of the information on the measurement environment of the first measuring device, so that more accurate calibration is performed. be able to.
  • the spectral radiation characteristic A combination of similar measurement objects is determined from the combination information.
  • the user can input the evaluation of the determined combination, so that the input evaluation can be referred to when determining the optimum combination.
  • the first correction coefficient is a correction coefficient based on the spectral emission characteristic of the measurement target and the spectral responsivity of the first color measurement device used for the measurement.
  • a correction coefficient for calibrating the measurement value of the first measurement device to a value obtained by the second measurement device is used as a second correction coefficient, and the first correction coefficient and the second correction coefficient are associated with each other.
  • the correction coefficient is the third correction coefficient
  • the combination stored in the storage unit includes the third correction coefficient. Therefore, the first correction coefficient is calculated and the calculated first correction coefficient is calculated.
  • the second correction coefficient can be calculated from the correction coefficient and the third correction coefficient included in the determined combination, and the measured value can be corrected using the calculated second correction coefficient.
  • the spectral responsivity of the first color measurement device can be called from the first color measurement device.
  • the spectral responsivity of the first color measurement device can be called from the storage means.
  • the combination information includes the third identification information for identifying the second color measurement device, the first identification information, and the second identification information. And because it is combined in association with the spectrophotometric characteristics, if the user holds a second colorimeter identified by this third identification, then this second colorimeter is used again. It is possible to perform processing such as measuring the spectral radiation characteristic of the measurement object and performing correction based on the result.
  • the optimum combination corresponding to the first color measuring device actually used and the measurement object is selected from a plurality of combinations stored in advance in the storage means. Since the spectral radiation characteristics included in the selected combination are used for the calibration of the first color measurement device, even if the first color measurement device or the measurement target used for the measurement is changed, the condition is adapted. Highly accurate calibration can be performed easily and efficiently. Moreover, since the storage means is provided in an external database device different from the calibration device, the combination information can be centrally managed by the database device, and the calibration device can connect to the database device to store necessary information when necessary. Can be obtained.
  • one or a plurality of first colorimetric devices for specifying one or a plurality of stimulus value type first colorimetric devices each including at least three color channels.
  • the spectral emission characteristics of the measurement object measured by the second colorimetric device according to the spectrocolorimetric method are measured by the computer of the calibration device including a storage unit that stores in advance a plurality of pieces of combination information associated with each other.
  • the optimum combination of the first color measuring device, the measurement object, and the spectral radiation characteristic of the measurement object is discriminated from a plurality of combination information stored in the storage unit, and is included in the discriminated combination. It is possible to execute a process of correcting the measured value by the first color measuring device based on the spectral radiation characteristics of the object to be measured and the spectral response of the first color measuring device in which the measurement is performed.
  • one or a plurality of first colorimetric devices for specifying one or a plurality of stimulus value type first colorimetric devices each including at least three color channels.
  • Identification information, and one or more second identification information for specifying one or more measurement objects, and one or more second color measurement device using a spectral colorimetric method.
  • the measurement of the measured object is performed on a computer of a calibrator that can communicate with an external database device equipped with a storage means that stores a plurality of combination information in which the spectral radiation characteristics of the measured object are associated and combined in advance.
  • the first color measurement measurement is performed based on the first identification information of the first color measurement device and the second identification information of the measurement target.
  • the optimum combination of the device, the measurement object, and the spectral radiation characteristic of the measurement object is determined from a plurality of pieces of combination information stored in the storage unit, and the measurement object included in the determined combination is determined.
  • the process of correcting the measured value by the first color measuring device can be executed based on the spectral radiation characteristics and the spectral response of the first color measuring device in which the measurement is performed.
  • (A) is a diagram showing a relationship of correction coefficients at the time of factory shipment
  • (B) is a diagram showing a relationship of correction coefficients at the time of user use.
  • 7 is a flowchart for explaining still another operation of the calibration device in the calibration system shown in FIG. 1. It is a figure which shows an example of a neural network.
  • (A)-(C) is a figure for demonstrating the difference of a spectrum shape when comparing two measurement objects (display panels). It is a figure which shows an example of the initial value table of a weight. It is a figure which shows the structure of the calibration apparatus which concerns on other embodiment of this invention. It is a figure for demonstrating the basic calibration method.
  • FIG. 1 is a diagram showing a schematic configuration of a calibration system according to an embodiment of the present invention.
  • This calibration system includes a first color measurement device 2 that measures an object to be measured 1, and a calibration device 3 that receives measurement data from the first color measurement device 2 and calibrates the first color measurement device 2. And a database server 4.
  • a display panel such as a liquid crystal is exemplified as the measurement object 1, but the measurement object 1 is not limited to the display panel.
  • the first color measurement device 2 is a stimulus value type color measurement device that receives light whose wavelength is selected by an optical filter or the like with a sensor and uses a stimulus value according to the light intensity as a measurement value. Contains color channels. That is, it has three or more filters having different spectral transmissibility and three or more sensors for converting the light received through the filters into the corresponding measurement signals.
  • the first color measuring device is also referred to as a filter measuring device.
  • the calibration device 3 is composed of a personal computer, and includes a CPU 31, a RAM 32, a non-volatile memory 33 such as a hard disk, and a functional unit including a measurement unit 34, a determination unit 35, a calibration unit 36, and a communication unit 37.
  • the CPU 31 centrally controls the entire calibration device 3, and the RAM 32 provides a work area when the CPU 31 operates according to an operation program stored in the nonvolatile memory 33 or the like.
  • the non-volatile memory 33 stores the operation program of the CPU 31 and various data.
  • various data measurement data that is raw data (raw data) of the object to be measured acquired from the filter measuring device 2, filter measuring device ID that is identification information for specifying the filter measuring device 2, There is a spectral responsivity of the filter measuring device 2.
  • the measuring unit 34 acquires the measurement data from the filter measuring device 2, and also acquires the filter measuring device ID and the spectral responsivity.
  • the acquired measurement data, filter measuring device ID, and spectral responsivity are stored in the nonvolatile memory 33 as described above.
  • a measurement object ID also referred to as a display type
  • the measurement object ID is acquired based on, for example, user input.
  • the filter measuring instrument ID and the like may also be acquired based on the user input.
  • the discriminating unit 35 selects the optimum combination of the filter measuring device 2 used for the actual measurement and the measurement object 1 from the combination information stored in the database server 4. Although it is determined, this point will be described later.
  • the calibration unit 36 calibrates the filter measuring device 2 by using the spectral radiation characteristics of the measurement object 1 included in the optimum combination determined by the discrimination unit 35.
  • the communication unit 37 is a communication interface for connecting the calibration device 3 to the database server 4 and the filter measuring device 2 via the network 5.
  • the database server 4 is composed of a personal computer or the like, has a storage unit 41, and holds a plurality of combination information for performing calibration of the filter measuring instrument 2 as a combination table in the storage unit 41.
  • the filter measuring instrument 2 has a measurement error due to the difference between the spectral responsivity and the target spectral responsivity such as the color matching function. It is desirable to calibrate the filter measuring instrument 2 by calculating the correction count and correcting the measured value by using the information on the spectral response rate and the spectral radiation characteristic of the object 1 to be measured.
  • a plurality of filter measuring devices 2 of different types, a plurality of measurement objects 1 of different types, and a second color measuring device (hereinafter, also referred to as a spectroscopic measuring device) 5 by a spectrocolorimetric method are provided.
  • the spectral radiation characteristic of the measuring object 1 is measured in advance by the spectroscopic measurement device 5.
  • the spectral response of the filter measuring device 2 is also measured.
  • the measurement object 1 and the filter measuring instrument 2 are given a measurement object ID (display type) and a filter measuring instrument ID for identifying them, but in this embodiment, as a desirable embodiment.
  • the spectroscopic measuring instrument 5 is also given a spectroscopic measuring instrument ID. Then, the obtained spectral radiation characteristic, the ID of the spectroscopic measuring instrument 5 that measured the spectral radiation characteristic, the ID of the filter measuring instrument 2, and the ID of the measuring object 1 are associated with each other and stored in the database server 4 as a combination table. It is stored in the section 41 and saved.
  • FIG. 2 shows an example of a combination table stored and saved in the database server 4.
  • the filter measuring device ID the measurement target ID (Display Type), the spectroscopic measuring device ID, and the spectral radiation characteristic are stored in association with each other.
  • the spectral responsivity of each filter measuring instrument 2 may be defined in this table in association with the filter measuring instrument ID, the measurement object ID, the spectroscopic measuring instrument ID, etc. It may be stored in the container 2 itself.
  • the filter measuring instrument 2 when the filter measuring instrument 2 is shipped from the factory, the filter measuring instrument 2, various measuring objects 1 and various spectroscopic measuring instruments 5 are combined to measure the spectral radiation characteristics of the measuring object 1, and the results are shown.
  • the filter measuring device ID, the measurement object ID, and the spectroscopic measuring device ID are stored as combination information in the storage unit 41 of the database server 4 as a combination table.
  • the spectral response of the filter measuring device 2 is also measured and stored in the filter measuring device 2 itself, or stored in the combination table of the database server 4 in association with the filter measuring device ID. By repeating this, a large amount of combination information is stored in the database server.
  • the user measures the measurement object 1 using the shipped filter measuring device 2, but the measuring unit 34 of the calibration device 3 acquires the measurement data, the filter measuring device ID, and the spectral responsivity from the filter measuring device 2.
  • the display type of the measuring object 1 is acquired by user input or the like (step S01).
  • the determination unit 35 of the calibration device 3 accesses the database server 4 via the network and acquires the combination information from the combination table of the database server 4 (step S01).
  • the determination unit 35 further compares the acquired combination information with the filter measurement device ID and display type acquired by the measurement unit 34, and determines a combination in which the filter measurement device ID and the display type match from the combination information. (Step S01). Then, the spectroscopic measurement device 5 and the spectroscopic radiation characteristic indicated by the spectroscopic measurement device ID included in the determined combination are the optimum spectroscopic measurement device corresponding to the filter measurement device 2 and the measurement target 1 that are actually used. 5 and the spectroscopic radiation characteristics are determined (step S01).
  • the filter measuring instrument ID is a and the display type is a circle number 1
  • the spectroscopic measuring instrument ID is determined to be A and the spectral radiation characteristic is determined to be ⁇ .
  • the calibration unit 36 calculates a correction coefficient (corresponding to the first correction coefficient) CM1 using the determined spectral radiation characteristic and the spectral responsivity of the filter measuring device 2 (step S02), and the calculated correction is performed.
  • the measurement data (Raw data) is corrected using the coefficient CM1 (step S03).
  • a plurality of combinations of the spectral radiation characteristics of the filter measuring device 2, the measuring object 1, the spectroscopic measuring device 5, and the measuring object 1 are stored in association with the database server 4 in advance. From the combination information, the optimum combination corresponding to the actually used filter measuring device 2 and the measurement object 1 is selected, and the spectral radiation characteristics included in the selected combination are corrected when the filter measuring device 2 is calibrated. Since it is used for calculating the coefficient, even if the filter measuring device 2 or the measuring object 1 used for the measurement is changed, or the user does not hold the optimum spectroscopic measuring device 5, the accuracy suitable for the conditions can be obtained. High calibration can be done easily and efficiently.
  • the combination information includes the spectroscopic measurement device ID for specifying the spectroscopic measurement device 5
  • the user holds the spectroscopic measurement device 5 specified by this spectroscopic measurement device ID.
  • the spectral radiation characteristic of the measurement object 1 may be measured again using the spectroscopic measurement device 5, and the correction coefficient CM1 may be calculated based on the result.
  • the spectral emission characteristic since the spectral emission characteristic has already been obtained, it is possible to perform calibration with high traceability.
  • a large number of pieces of combination information defined in the combination table shown in FIG. 2 are associated with the filter measuring instrument ID, the display type of the measurement object 1, the spectroscopic measuring instrument ID, and the spectral radiation characteristic, respectively. It was the one that was done.
  • the spectral radiation characteristics are measured in advance by changing the measurement position on the measurement object 1 under various combinations, and information for specifying the measurement position is displayed as shown in the combination table of FIG. Is also held in the combination table in association with the filter measuring device ID, display type, spectroscopic measuring device ID, and spectral radiation characteristic.
  • the measuring unit 34 of the calibration device 3 acquires the measurement data, the filter measuring device ID, and the spectral responsivity from the filter measuring device 2, and Information on the measurement position and the display type are acquired by user input or the like (step S11).
  • the determination unit 35 of the calibration device 3 accesses the database server 4 via the network and acquires the combination information from the combination table of the database server 4 (step S11).
  • the determination unit 35 further compares the acquired combination information with the filter measurement device ID, the display type, and the measurement position acquired by the measurement unit 34, and the filter measurement device ID, the display type, and the measurement position are selected from the combination information. A matching combination is determined (step S11). Then, the spectroscopic measuring instrument 5 and the spectral radiation characteristics indicated by the spectroscopic measuring instrument ID included in the determined combination are optimally spectroscopically measured corresponding to the filter measuring instrument 2 and the measurement object 1 used for the measurement. It is determined as the device 5 and the spectroscopic radiation characteristics (step S11).
  • the filter measuring instrument ID is a
  • the display type is a circle number 1
  • the measuring position is the measuring position 1
  • the spectroscopic measuring instrument ID is determined to be A and the spectral radiation characteristic is determined to be ⁇ .
  • the calibration unit 36 calculates the correction coefficient CM1 using the determined spectral radiation characteristic and the spectral responsivity of the filter measuring device 2 (step S12), and corrects the measurement data using the calculated correction coefficient CM1. Yes (step S13).
  • the combination information stored in advance in the database server 4 also includes information for specifying the measurement position, so that the optimum combination is determined in consideration of the measurement position. And more accurate calibration can be done.
  • the correction coefficient CM1 differs not only with the measurement position on the measurement object but also with the measurement angle, it is not possible to perform highly accurate calibration if the measurement angles are different.
  • the measurement position in the measurement object 1 is changed under various combinations to perform the measurement in advance, and the measurement position and the measurement angle are specified as shown in the combination table of FIG.
  • the information for doing so is also stored in the combination table in association with the filter measuring device ID, the display type, the spectroscopic measuring device ID, and the spectral radiation characteristic.
  • the measuring unit 34 of the calibration device 3 acquires the measurement data, the filter measuring device ID, and the spectral responsivity from the filter measuring device 2, and Information on the measurement position and the measurement angle and the display type are acquired by user input or the like (step S21).
  • the determination unit 35 of the calibration device 3 accesses the database server 4 via the network and acquires the combination information from the combination table of the database server 4 (step S21).
  • the determination unit 35 further compares the acquired combination information with the filter measurement device ID, the display type, the measurement position, and the measurement angle acquired by the measurement unit 34, and from the combination information, the filter measurement device ID, the display type, A combination in which the measurement position and the measurement angle match is determined (step S21). Then, the spectroscopic measuring instrument 5 and the spectral radiation characteristics indicated by the spectroscopic measuring instrument ID included in the determined combination are optimally spectroscopically measured corresponding to the filter measuring instrument 2 and the measurement object 1 used for the measurement. It is determined as the device 5 and the spectroscopic radiation characteristics (step S21).
  • the filter measuring device ID is a
  • the display type is circled number 1
  • the measuring position is measuring position 1
  • the measuring angle is ⁇
  • the spectroscopic measuring device ID is determined to be A
  • the spectral radiation characteristic is determined to be ⁇ .
  • the calibration unit 36 calculates the correction coefficient CM1 using the determined spectral radiation characteristic and the spectral response of the filter measuring device 2 (step S22), and corrects the measurement data using the calculated correction coefficient CM1. Yes (step S23).
  • the combination information stored in advance in the database server 4 includes information for specifying the measurement angle as well as the measurement position, the measurement angle is also taken into consideration. The optimal combination can be determined, and more accurate calibration can be performed.
  • the combination table may include only information about the measurement angle, not both the measurement position and the measurement angle.
  • Value[Spectrometer] is a matrix that is the individual stimulus values obtained from the spectroscopic data
  • Value[Filter type measuring instrument]] is a matrix that is the individual stimulus values of the measurement data (Raw data) obtained by the filter measuring instrument.
  • CM2 be the calibration matrix (second correction factor)
  • Value [Spectrometer] CM2 * Value [Filter type measuring instrument]] ⁇ ⁇ ⁇ (2) It is represented by.
  • the first correction described above is performed.
  • the coefficient (CM1) and the above second correction coefficient (CM2) do not completely match.
  • CM1 and CM2' represent the first and second correction coefficients when the user is actually using the filter measuring instrument.
  • the third correction coefficient (CM3) may be obtained by the ratio of the first correction coefficient (CM1) and the second correction coefficient (CM2) as in the following formula (4).
  • CM2' CM1' * (CM2 / CM1)) ⁇ (4)
  • ID identification information
  • ID Information on the spectral radiation characteristic and further the third correction coefficient (CM3) are associated with each other and held as a combination table.
  • the ID of the filter measurement device 2 and the ID of the measurement object 1 which are being used are measured by the measurement unit 34 of the calibration device 3 by the acquired measurement data (Raw Data) and set and hold. Then, a combination that matches the filter measuring device ID and the measurement object ID is determined from the combination information, and the spectroscopic measuring device ID, the spectral radiation characteristic, and the third correction coefficient (CM3) included in the combination are determined. To do.
  • the first correction coefficient (CM1′) is calculated from the spectral responsivity of the filter measuring device 2 and the spectral radiation characteristic, and from the first correction coefficient (CM1′) and the third correction coefficient (CM3).
  • the second correction coefficient (CM2′) is derived from the expression (3) or the expression (4), and the measurement value is corrected using the second correction coefficient (CM2′).
  • an ID that is identification information is attached to the filter measuring device 2 and the measuring object 1, and the spectral responsivity of each filter measuring device 2 and the measuring device information and the spectrum used for measuring each measuring object 1 Information on the radiation characteristics is set (associated) with each of these IDs and held as a combination table. Then, as shown in the flowchart of FIG. 10, at the time of actual measurement, the temperature, the humidity, the place, and the external light (measurement) obtained by the external environment measuring device 6 provided integrally with or separately from the calibration device 3 are measured.
  • Measurement environment information such as (illuminance of place), external electric field magnetic field, vibration of measuring instrument, cleanliness of measurement place, stability of power supply, and ID of worker involved in measurement.
  • the user may add the measurement environment information (measurement environment parameters) to the combination table read by the determination unit 35. 10 is the same as the flowchart of FIG. 5 except that the measurement environment information (measurement environment parameters) is stored as a set with the measurement data. Detailed description is omitted.
  • the measured value is uniquely changed from the measured value of each lot or each measuring device accumulated in the database server 4, or Failure prediction may be performed in advance by finding a lot or a measuring instrument that changes linearly.
  • a combination in which the IDs of the filter measuring instrument 2 used for the actual measurement and the measurement object 1 match is selected from the combination information stored in the combination table.
  • AI artificial intelligence
  • the database server 4 may store an initial value table of weights for discriminating a combination of the measurement objects 1 having similar spectral radiation characteristics together with the combination table.
  • the weight initial value table indicates the ID (display type) of a measurement object having a similar spectrum shape even when measuring a measurement object (display panel) that differs from the spectrum shape of the spectral emission characteristics of the measurement object. It means a table for specifying, for example, the weighting coefficient W in the neural network.
  • the neural network is represented by a schematic diagram as shown in FIG. In FIG. 11, o1 1 , o2 1 , and o3 1 output 1 if the difference is large at each wavelength, and 0 if the difference is small (step function below: 1 if u is larger than the threshold value b, 0 if smaller) Output).
  • the spectral shapes of the LED and the OLED are as shown in FIGS. There is no difference, and there is a small difference in relative intensity at 550 nm, and a large difference in relative intensity at 650 nm.
  • the weighting coefficient W (initial value table of weights) shown in FIG. 13 is determined.
  • the probability of mismatch is 79% [1.5 / (1.5 + 0.4) * 100]
  • the probability of match is 21% [0.4 / (1.5 + 0.4) * 100].
  • the combination table is stored in the database server 4, and the calibration device 3 acquires the combination information from the database server 4 via the network.
  • the combination table may be stored and stored in the non-volatile memory (storage unit) 33 in the calibration device 3.
  • the calibration device 3 does not need to acquire the combination information from the external database server 4.
  • the operation of the calibration device 3 in FIG. 14 is the same as the operation of the calibration device 3 in the calibration system shown in FIG. 1, except that the combination information is acquired in the own device as described above.
  • the present invention can be used to calibrate a stimulus-type colorimeter that includes at least three color channels.

Abstract

Selon l'invention, des informations d'identification d'un premier dispositif de mesure de couleur (2) d'un type de valeur de stimulus, des informations d'identification d'un objet de mesure (1), et de multiples morceaux d'informations combinatoires obtenus par l'association et la combinaison de caractéristiques d'émittance spectrale d'un objet de mesure mesuré par colorimétrie spectroscopique à l'aide d'un second dispositif de mesure de couleur (5), sont mémorisés à l'avance. Lors de la réalisation d'un étalonnage sur le premier dispositif de mesure de couleur (2) qui a effectué une mesure de l'objet de mesure (1), une combinaison optimale est identifiée parmi les multiples morceaux d'informations combinatoires sur la base des informations d'identification du premier dispositif de mesure de couleur (2) et des informations d'identification de l'objet de mesure (1), puis, sur la base des caractéristiques d'émittance spectrale comprises dans la combinaison identifiée et d'une capacité de réponse spectrale du premier dispositif de mesure de couleur (2) qui a effectué la mesure, une correction est réalisée sur une valeur de mesure fournie par le premier dispositif de mesure de couleur (2).
PCT/JP2020/008081 2019-03-05 2020-02-27 Système d'étalonnage, dispositif d'étalonnage et programme WO2020179629A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010228452A (ja) * 2009-03-25 2010-10-14 Heidelberger Druckmas Ag 角度に依存する色値補正
JP2012215570A (ja) * 2011-04-01 2012-11-08 X-Rite Europe Gmbh 色測定デバイスの較正方法
US8525997B1 (en) * 2012-03-30 2013-09-03 Datacolor, Inc. System and apparatus for improved low reflectance color measurement
JP2015121507A (ja) * 2013-12-25 2015-07-02 キヤノン株式会社 測定装置、キャリブレーション装置、及び表示装置
WO2017046829A1 (fr) * 2015-09-17 2017-03-23 株式会社Ｅｌａｎ Dispositif de mesure de couleur et procédé de mesure de couleur
JP2018207225A (ja) * 2017-05-31 2018-12-27 キヤノン株式会社 画像形成装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010228452A (ja) * 2009-03-25 2010-10-14 Heidelberger Druckmas Ag 角度に依存する色値補正
JP2012215570A (ja) * 2011-04-01 2012-11-08 X-Rite Europe Gmbh 色測定デバイスの較正方法
US8525997B1 (en) * 2012-03-30 2013-09-03 Datacolor, Inc. System and apparatus for improved low reflectance color measurement
JP2015121507A (ja) * 2013-12-25 2015-07-02 キヤノン株式会社 測定装置、キャリブレーション装置、及び表示装置
WO2017046829A1 (fr) * 2015-09-17 2017-03-23 株式会社Ｅｌａｎ Dispositif de mesure de couleur et procédé de mesure de couleur
JP2018207225A (ja) * 2017-05-31 2018-12-27 キヤノン株式会社 画像形成装置

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