CN113518903B

CN113518903B - Calibration system, calibration device, and program

Info

Publication number: CN113518903B
Application number: CN202080017772.XA
Authority: CN
Inventors: 永井浩大; 出石聪史; 上松干夫
Original assignee: Konica Minolta Inc
Current assignee: Konica Minolta Inc
Priority date: 2019-03-05
Filing date: 2020-02-27
Publication date: 2024-03-15
Anticipated expiration: 2040-02-27
Also published as: WO2020179629A1; CN113518903A; JPWO2020179629A1; JP7459863B2

Abstract

The identification information of the 1 st color measuring device (2) of the stimulus value type, the identification information of the object to be measured (1), and a plurality of pieces of combination information in which the spectral emission characteristics of the object to be measured by the 2 nd color measuring device (5) based on the spectral color measuring method are combined in association are stored in advance. When the calibration of the 1 st color measuring device (2) for measuring the object (1) is performed, an optimal combination is determined from a plurality of combination information based on the identification information of the 1 st color measuring device (2) and the object (1), and a measurement value based on the 1 st color measuring device (2) is corrected based on the spectral emission characteristics included in the determined combination and the spectral responsivity of the 1 st color measuring device (2) for measuring.

Description

Calibration system, calibration device, and program

Technical Field

The present invention relates to a calibration system, a calibration device and a program for use in performing a calibration of a color measuring device of the stimulus value type comprising at least 3 color channels.

Background

A stimulus value type color measuring device, such as a color luminance meter having spectral responsivity similar to an isochromatic function, that receives light having a wavelength selected by an optical filter or the like by a sensor and uses a stimulus value corresponding to light intensity as a measurement value, has a measurement error due to a difference between the spectral responsivity of the color measuring device formed by the spectral characteristics of the optical filter or the sensor and the target spectral responsivity such as the isochromatic function.

Accordingly, there is known a technique of estimating a coefficient of a correction measurement value as expressed by the following formula (1) by using information on the spectral responsivity of a color measuring device and the spectral emission characteristics of a measurement object, and correcting the measurement value by using the correction coefficient (for example, patent document 1 and patent document 2).

P＊S＊CM1＝P＊CMF …(1)

In the above formula (1), P represents a matrix of spectral values of the emission spectrum of the target light source, S represents a matrix of spectral values of the spectral sensitivity of the filter of the measuring instrument, CMF represents a matrix of spectral values of the spectral evaluation function of the standard specified in CIE1931, and CM1 represents a calibration matrix (correction coefficient).

That is, as shown in fig. 15, in a factory or the like, the spectral emission characteristics (spectral data) of a measurement object are measured by a color measuring device (also referred to as a spectral measuring instrument) based on a spectral color measuring system, and the spectral responsivity of a stimulus value type color measuring device (also referred to as a filter measuring instrument) is measured in advance. Then, a correction coefficient CM1 is estimated from the spectral responsivity of the filter measurement device and the spectral emission characteristics of the measurement object, and the actual measurement value by the filter measurement device is corrected by the correction coefficient, thereby obtaining an accurate measurement value.

Prior art literature

Patent literature

Patent document 1: U.S. patent No. 9163990

Patent document 2: japanese patent application laid-open No. 2012-215570

Disclosure of Invention

However, patent documents 1 and 2 do not consider a combination of a spectroscopic measuring device for measuring spectroscopic emission characteristics of an object to be measured and a filter measuring device using an optical filter. The spectroscopic emission characteristics of the measurement object also depend on the measurement position, measurement angle, and the like. That is, the correction coefficient CM1 exists for each of a plurality of combinations of the spectral emission characteristic of the measurement target object to be referred to, the filter measurement device, and various parameters that cause errors. Therefore, in order to calculate an appropriate correction coefficient CM1 to perform calibration with high accuracy, it is necessary to select an optimal combination from a plurality of combinations, but such an idea is not shown in patent documents 1 and 2.

Further, if the spectral emission characteristics of the measurement object, the spectral responsivity of the filter measuring instrument, and the like are measured at each calibration, and the correction coefficient is estimated from the measurement result, the spectral emission characteristics and the like must be measured every time the measurement object and the spectral measuring instrument are changed, which is inefficient and requires time for the calibration operation.

The present invention has been made in view of the above-described technical background, and an object thereof is to provide a calibration system, a calibration device, and a program that can easily and efficiently perform highly accurate calibration even under different measurement conditions when a measurement object is measured by a stimulus value type color measuring device including at least 3 color channels.

The above object is achieved by the following means.

(1) A calibration system is provided with: a storage unit that stores a plurality of pieces of combination information in advance, the plurality of pieces of combination information being formed by associating and combining 1 or more 1 st identification information for specifying 1 st color measuring devices of 1 st or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for specifying 1 or more measurement objects, and spectroscopic emission characteristics of the measurement objects measured by 1 or more 2 nd color measuring devices based on spectroscopic color measurement methods; a determination unit configured to determine, when calibration of the 1 st color measuring device that measures the object to be measured is performed, an optimal combination of the 1 st color measuring device that measures the object to be measured and a spectroscopic-radiation characteristic of the object to be measured from among the plurality of combination information stored in the storage unit, based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured; and a calibration unit configured to correct a measurement value based on the 1 st color measuring device based on the spectral emission characteristics of the measurement object included in the combination determined by the determination unit and the spectral responsivity of the 1 st color measuring device measured.

(2) The calibration system according to item 1 above, wherein the combination information is stored in the storage unit in advance as a table.

(3) The calibration system according to item 1 or 2 above, wherein each combination of the combination information includes information for specifying a measurement position, and the determination means determines an optimal combination based on the measurement position of the 1 st color measuring device used for measurement.

(4) The calibration system according to any one of the preceding items 1 to 3, wherein each combination of the combination information includes information for specifying a measurement angle, and the determination means determines an optimal combination based on the measurement angle of the 1 st color measuring device used for measurement.

(5) The calibration system according to any one of the preceding items 1 to 4, wherein each combination of the combination information includes information on a measurement environment, and the determination means determines an optimal combination based on the measurement environment of the 1 st color measuring device used for measurement.

(6) The calibration system according to any one of the foregoing items 1 to 5, wherein the determination means determines, from among the combination information, a combination of the measurement objects having similar spectral emission characteristics when the 2 nd information indicating the measurement object measured by the 1 st color measuring device does not exist among the combination information stored in the storage means.

(7) The calibration system according to item 6 above, wherein the storage means stores an initial value table for discriminating a weight of a combination of measurement objects having similar spectral emission characteristics.

(8) The calibration system according to any one of the preceding items 6 or 7, wherein the user can input the evaluation of the combination determined by the determination unit.

(9) The calibration system according to any one of the foregoing items 1 to 8, wherein, when a correction coefficient based on the spectral emission characteristic of the measurement object and the spectral responsivity of the 1 st color measuring device used in measurement is set as a 1 st correction coefficient, a correction coefficient for calibrating a measurement value based on the 1 st measurement device to a value obtained by the 2 nd measurement device is set as a 2 nd correction coefficient, and a correction coefficient for correlating the 1 st correction coefficient and the 2 nd correction coefficient is set as a 3 rd correction coefficient, the 3 rd correction coefficient is included in a combination stored in the storage unit, the calibration unit calculates the 1 st correction coefficient, and calculates the 2 nd correction coefficient based on the calculated 1 st correction coefficient and the 3 rd correction coefficient included in the combination determined by the determination unit, and corrects the measurement value using the calculated 2 nd correction coefficient.

(10) The calibration system according to any one of the preceding claims 1 to 9, wherein the spectral responsivity of the 1 st color measuring device is stored in the 1 st color measuring device.

(11) The calibration system according to any one of the preceding claims 1 to 9, wherein the spectroscopic responsivity of the 1 st color measuring device is stored in the storage means.

(12) The calibration system according to any one of the preceding claims 1 to 11, wherein the 3 rd identification information for specifying the 2 nd color measuring device is combined with the 1 st identification information, the 2 nd identification information, and the spectroradiometric property in association with each other in the combination information.

(13) A calibration device is provided with: a storage unit that stores a plurality of pieces of combination information in advance, the plurality of pieces of combination information being formed by associating and combining 1 or more 1 st identification information for specifying 1 st color measuring devices of 1 st or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for specifying 1 or more measurement objects, and spectroscopic emission characteristics of the measurement objects measured by 1 or more 2 nd color measuring devices based on spectroscopic color measurement methods; a determination unit configured to determine, when calibration of the 1 st color measuring device that measures the object to be measured is performed, an optimal combination of the 1 st color measuring device that measures the object to be measured and a spectroscopic-radiation characteristic of the object to be measured from among the plurality of combination information stored in the storage unit, based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured; and a calibration unit configured to correct a measurement value based on the 1 st color measuring device based on the spectral emission characteristics of the measurement object included in the combination determined by the determination unit and the spectral responsivity of the 1 st color measuring device measured.

(14) An alignment apparatus capable of communicating with an external database apparatus having a storage unit that stores a plurality of pieces of combination information in advance, the plurality of pieces of combination information being formed by associating 1 or more 1 st identification information for identifying 1 st color measuring apparatuses of 1 or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for identifying 1 or more measuring objects, and spectral emission characteristics of the measuring objects measured by 1 or more 2 nd color measuring apparatuses based on a spectral color measuring method, the alignment apparatus comprising: a determination unit configured to determine, when calibration of the 1 st color measuring device that measures the object to be measured is performed, an optimal combination of the 1 st color measuring device that measures the object to be measured and a spectroscopic-radiation characteristic of the object to be measured from among the plurality of combination information stored in the storage unit, based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured; and a calibration unit configured to correct a measurement value based on the 1 st color measuring device based on the spectral emission characteristics of the measurement object included in the combination determined by the determination unit and the spectral responsivity of the 1 st color measuring device measured.

(15) The calibration device according to any one of the preceding items 13 or 14, wherein the combination information is stored in the storage unit in advance as a table.

(16) The calibration device according to any one of the preceding claims 13 to 15, wherein each combination of the combination information includes information for specifying a measurement position, and the determination means determines an optimal combination based on the measurement position of the 1 st color measuring device used for measurement.

(17) The calibration device according to any one of the preceding claims 13 to 16, wherein each combination of the combination information includes information for specifying a measurement angle, and the determination means determines an optimal combination based on the measurement angle of the 1 st color measuring device used for measurement.

(18) The calibration device according to any one of the preceding claims 13 to 17, wherein each combination of the combination information includes information on a measurement environment, and the determination means determines an optimal combination based on the measurement environment of the 1 st color measuring device used for measurement.

(19) The calibration device according to any one of the foregoing items 13 to 18, wherein the determination means determines, from among the combination information, a combination of measurement objects having similar spectral emission characteristics when the 2 nd information indicating the measurement object measured by the 1 st color measuring device does not exist among the combination information stored in the storage means.

(20) The calibration device according to item 19, wherein the storage means stores an initial value table for discriminating a weight of a combination of measurement objects having similar spectral emission characteristics.

(21) The calibration device according to any one of the preceding items 19 or 20, wherein the user can input the evaluation of the combination determined by the determination means.

(22) The calibration device according to any one of the foregoing items 13 to 21, wherein, when a correction coefficient based on the spectral emission characteristic of the measurement object and the spectral responsivity of the 1 st color measuring device used in measurement is set as a 1 st correction coefficient, a correction coefficient for calibrating a measurement value based on the 1 st measurement device to a value obtained by the 2 nd measurement device is set as a 2 nd correction coefficient, and a correction coefficient for correlating the 1 st correction coefficient and the 2 nd correction coefficient is set as a 3 rd correction coefficient, the 3 rd correction coefficient is included in a combination stored in the storage unit, the calibration unit calculates the 1 st correction coefficient, and calculates the 2 nd correction coefficient based on the calculated 1 st correction coefficient and the 3 rd correction coefficient included in the combination determined by the determination unit, and corrects the measurement value using the calculated 2 nd correction coefficient.

(23) The calibration device according to any one of the preceding claims 13 to 22, wherein the spectral responsivity of the 1 st color measuring device is stored in the 1 st color measuring device.

(24) The calibration device according to any one of the preceding claims 13 to 22, wherein the spectral responsivity of the 1 st color measuring device is stored in the storage means.

(25) The calibration device according to any one of the preceding claims 13 to 24, wherein, in the combination information, 3 rd identification information for specifying the 2 nd color measuring device is combined in association with the 1 st identification information, the 2 nd identification information, and the spectroradiometric property.

(26) A program for causing a computer of a calibration apparatus to execute a discrimination step and a calibration step, the calibration apparatus including a storage unit that stores in advance a plurality of pieces of combination information, the plurality of pieces of combination information being formed by associating, when calibration of the 1 st color measuring apparatus in which measurement of a measurement object is performed, 1 st identification information of the 1 st color measuring apparatus including 1 or more stimulus value types of at least 3 color channels, 1 st or more 2 nd identification information for determining 1 or more measurement objects, and spectroscopic emission characteristics of the measurement object measured by the 1 st or more 2 nd color measuring apparatuses based on a spectroscopic color measurement method, respectively, and in the discrimination step, correction of the spectroscopic emission characteristics of the measurement object is performed by the combination discrimination means from the 1 st identification information of the 1 st color measuring apparatus and the 2 nd identification information of the measurement object, among the plurality of pieces of combination information stored in the storage unit, the measurement object measured by the measurement object, and the measurement object measured by the measurement apparatus having the spectroscopic emission characteristics measured by the 1 st color measuring apparatus included in accordance with the combination discrimination step.

(27) A program for causing a computer of a calibration device capable of communicating with an external database device provided with a storage unit that stores in advance a plurality of pieces of combination information, the plurality of pieces of combination information being formed by associating and combining 1 or more pieces of 1 st identification information of a 1 st color measuring device including 1 or more stimulus value types of at least 3 color channels, 1 or more pieces of 2 nd identification information for determining 1 or more measuring objects, and spectroscopic emission characteristics of the measuring objects measured by 1 or more 2 nd color measuring devices based on a spectroscopic color measuring method, from among the plurality of pieces of combination information stored in the storage unit, in the step of discriminating, when the calibration of the 1 st color measuring device in which the measurement of the measuring objects is performed, the 1 st color measuring device in which the measurement of the measuring objects is performed, and the measurement object in which the spectroscopic emission characteristics of the measuring objects are measured are determined by the combination of the 1 st color measuring device in accordance with the spectroscopic emission characteristics of the 1 st color measuring device, the combination of the spectroscopic characteristics of the measuring objects are corrected in accordance with the spectroscopic emission characteristics of the 1 st color measuring device.

According to the inventions described in the foregoing items (1) and (13), the 1 st or more pieces of 1 st identification information for identifying the 1 st color measuring device including 1 or more stimulus value types of at least 3 color channels, the 1 st or more pieces of 2 nd identification information for identifying 1 st or more objects to be measured, the spectral responsivity of the 1 st color measuring device, and the spectral emission characteristics of the objects to be measured by the 1 st or more 2 nd color measuring devices based on the spectral color measuring method are correlated and combined, and the plurality of pieces of combined information are stored in the storage unit in advance. When the 1 st color measuring device for measuring the object to be measured is calibrated, the optimal combination of the 1 st color measuring device for measuring, the object to be measured, and the spectral emission characteristics of the object to be measured is determined from among the plurality of combination information stored in the storage means based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured, and the measurement value based on the 1 st color measuring device is corrected based on the spectral emission characteristics of the object to be measured and the spectral responsivity of the 1 st color measuring device to be measured included in the determined combination.

In this way, since the optimal combination corresponding to the 1 st color measuring device and the measurement object to be actually used is selected from among the combinations stored in advance in the storage unit, and the spectral emission characteristics included in the selected combination are used for the calibration of the 1 st color measuring device, the 1 st color measuring device and the measurement object to be used for the measurement can be easily calibrated with high accuracy in accordance with the conditions even if the 1 st color measuring device and the measurement object to be used for the measurement change. Further, since it is not necessary to measure the spectral emission characteristics of the measurement object, the spectral responsivity of the filter measuring instrument, and the like at each calibration and calculate the correction coefficient from the measurement result, the calibration operation can be performed with good efficiency in a short time.

According to the inventions described in the foregoing items (2) and (15), the determination means can determine the optimum combination from among the tables of the combination information stored in the storage means.

According to the inventions described in the foregoing items (3) and (16), since the optimal combination can be determined in consideration of the measurement position of the 1 st measurement device, more accurate calibration can be performed.

According to the inventions described in the foregoing items (4) and (17), since the optimum combination can be determined in consideration of the measurement angle of the 1 st measurement device, more accurate calibration can be performed.

According to the inventions described in the foregoing items (5) and (18), the optimal combination can be determined in consideration of the information of the measurement environment of the 1 st measurement device, so that more accurate calibration can be performed.

According to the inventions described in the foregoing items (6) and (19), when the 2 nd information indicating the measurement object measured by the 1 st color measuring device does not exist in the combination information, the combination of the measurement objects having the similar spectral emission characteristics is determined from the combination information.

According to the inventions described in the foregoing items (7) and (20), it is possible to determine a combination of measurement objects having similar spectral emission characteristics from the initial value table of the weights.

According to the inventions described in the foregoing items (8) and (21), the user can input the evaluation of the determined combination, so that the input evaluation can be used as a reference in the determination of the optimal combination.

According to the inventions described in the foregoing items (9) and (22), when the correction coefficient based on the spectral responsivity of the 1 st color measuring device used in measurement and the spectral emission characteristic of the object to be measured is the 1 st correction coefficient, the correction coefficient for calibrating the measurement value based on the 1 st measurement device to the value obtained by the 2 nd measurement device is the 2 nd correction coefficient, and the correction coefficient for associating the 1 st correction coefficient with the 2 nd correction coefficient is the 3 rd correction coefficient, the 3 rd correction coefficient is included in the combination stored in the storage means, so that the 1 st correction coefficient can be calculated, the 2 nd correction coefficient is calculated based on the calculated 1 st correction coefficient and the 3 rd correction coefficient included in the determined combination, and the measured value is corrected using the calculated 2 nd correction coefficient.

According to the inventions described in the foregoing items (10) and (23), the spectroscopic responsivity of the 1 st color measuring device can be called from the 1 st color measuring device.

According to the inventions described in the foregoing items (11) and (24), the spectroscopic responsivity of the 1 st color measuring device can be called from the storage means.

According to the inventions described in the foregoing items (12) and (25), since the 3 rd identification information for identifying the 2 nd color measuring device is combined with the 1 st identification information, the 2 nd identification information, and the spectral emission characteristics in association with the combination information, when the user holds the 2 nd color measuring device identified by the 3 rd identification information, it is possible to perform a process of measuring the spectral emission characteristics of the object to be measured again by using the 2 nd color measuring device and correcting the spectral emission characteristics based on the result.

According to the invention described in the foregoing item (14), since the optimal combination corresponding to the 1 st color measuring device and the measurement object to be actually used is selected from among the combinations stored in advance in the storage means, and the spectral emission characteristics included in the selected combination are used for the calibration of the 1 st color measuring device, the 1 st color measuring device and the measurement object to be used in the measurement can be easily and efficiently calibrated with high accuracy in accordance with the conditions. Further, since the storage unit is provided in an external database device different from the calibration device, the combination information can be managed centrally by the database device, and the calibration device can be connected to the database device to acquire necessary information as needed.

According to the invention described in the foregoing item (26), a computer provided with a calibration device having a storage unit storing therein 1 st or more pieces of 1 st identification information for identifying 1 st color measuring devices each including 1 st or more stimulus value types of at least 3 color channels, 1 st or more pieces of 2 nd identification information for identifying 1 st or more objects to be measured, each spectral responsivity of the 1 st color measuring devices, and a plurality of pieces of combination information each obtained by combining the spectral emission characteristics of the objects to be measured by the 1 st or more 2 nd color measuring devices based on the spectral photometry method in association can execute the following processing: when the 1 st color measuring device for measuring the object to be measured is calibrated, the optimal combination of the 1 st color measuring device for measuring, the object to be measured, and the spectral emission characteristics of the object to be measured is determined from among the plurality of combination information stored in the storage means based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured, and the measurement value based on the 1 st color measuring device is corrected based on the spectral emission characteristics of the object to be measured and the spectral responsivity of the 1 st color measuring device for measuring included in the determined combination.

According to the invention described in the foregoing item (27), the following processing can be executed by a computer that can communicate with a database device provided with an external memory unit that stores in advance 1 st identification information or 1 st identification information for identifying 1 st color measuring device including 1 st or a plurality of stimulus value types of at least 3 color channels, 1 st identification information or 2 nd identification information for identifying 1 st or a plurality of measurement objects, and a plurality of combination information in which the spectral emission characteristics of the measurement objects measured by the 1 st or a plurality of 2 nd color measuring devices based on the spectral color measurement system are combined in association, wherein: when the 1 st color measuring device for measuring the object to be measured is calibrated, the optimal combination of the 1 st color measuring device for measuring, the object to be measured, and the spectral emission characteristics of the object to be measured is determined from among the plurality of combination information stored in the storage means based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured, and the measurement value based on the 1 st color measuring device is corrected based on the spectral emission characteristics of the object to be measured and the spectral responsivity of the 1 st color measuring device for measuring included in the determined combination.

Drawings

Fig. 1 is a diagram showing a schematic configuration of a calibration system according to an embodiment of the present invention.

Fig. 2 is a diagram showing an example of storing a combination table stored in a database server.

Fig. 3 is a flowchart for explaining the operation of the calibration device in the calibration system shown in fig. 1 under the combination table of fig. 2.

Fig. 4 is a diagram showing another example of the combination table.

Fig. 5 is a flowchart for explaining the operation of the calibration device in the calibration system shown in fig. 1 under the combination table of fig. 4.

Fig. 6 is a diagram showing still another example of the combination table.

Fig. 7 is a flowchart for explaining the operation of the calibration device in the calibration system shown in fig. 1 under the combination table of fig. 6.

Fig. 8 is a diagram for explaining an arbitrary calibration method.

Fig. 9 (a) is a diagram showing a relationship between correction coefficients at the time of shipment from a factory, and (B) is a diagram showing a relationship between correction coefficients at the time of use by a user.

Fig. 10 is a flowchart for explaining still another operation of the calibration device in the calibration system shown in fig. 1.

Fig. 11 is a diagram showing an example of a neural network.

Fig. 12 (a) to (C) are diagrams for explaining differences in spectral shapes when two objects to be measured (display panels) are compared.

Fig. 13 is a diagram showing an example of an initial value table of weights.

Fig. 14 is a diagram showing the structure of a calibration device according to another embodiment of the present invention.

Fig. 15 is a diagram for explaining a basic calibration method.

Symbol description

1: an object to be measured; 2: a filter measuring device (1 st color measuring device); 3: a calibration device; 31: a CPU;33: a nonvolatile memory; 34: a measuring unit; 35: a discriminating unit; 36: a calibration section; 37: a communication unit; 4: a database server; 41: a storage unit; 5: a spectroscopic measuring device (2 nd color measuring device); 6: and an external environment measuring unit.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[ embodiment 1 ]

Fig. 1 is a diagram showing a schematic configuration of a calibration system according to an embodiment of the present invention. The calibration system includes a 1 st color measuring device 2 for measuring a measurement object 1, a calibration device 3 for receiving measurement data from the 1 st color measuring device 2 and calibrating the 1 st color measuring device 2, and a database server 4.

In this embodiment, a display panel such as a liquid crystal is exemplified as the object 1 to be measured, but the object is not limited to the display panel.

The 1 st color measuring device 2 is a stimulus value type color measuring device that receives light having a wavelength selected by an optical filter or the like by a sensor and uses a stimulus value corresponding to the light intensity as a measurement value, and includes at least 3 color channels. That is, the light source device includes 3 or more filters having different spectral transmittances and 3 or more sensors for converting light received through the filters into corresponding measurement signals. Hereinafter, the 1 st 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 measurement unit 34, a determination unit 35, a calibration unit 36, and a communication unit 37 in addition to a CPU31, a RAM32, and a nonvolatile memory 33 such as a hard disk.

The CPU31 centrally controls the whole of the calibration device 3, and the RAM32 provides an operation area when the CPU31 operates in accordance with an operation program stored in the nonvolatile memory 33 or the like.

The nonvolatile memory 33 stores various data and an operation program of the CPU 31. As examples of the various data, there are measurement data as Raw data (Raw data) of the object to be measured obtained from the filter measuring device 2, a filter measuring device ID as identification information for specifying the filter measuring device 2, and spectral responsivity of the filter measuring device 2.

The measurement unit 34 acquires measurement data from the filter meter 2, and acquires a filter meter ID and spectral responsivity. The acquired measurement data, the filter measurer ID, and the spectral responsivity are stored in the nonvolatile memory 33 as described above. In addition, a measurement object ID (also referred to as Display Type) for specifying the measurement object 1 to be measured is also acquired. The object ID is obtained, for example, from a user input. The filter meter ID and the like may be acquired from a user input.

The determination unit 35 determines an optimal combination of the filter measuring instrument 2 and the object 1 suitable for use in actual measurement from among the combination information stored in the database server 4 in order to perform highly accurate calibration, as will be described later.

The calibration unit 36 performs calibration of the filter measuring instrument 2 using the spectral emission characteristics and the like of the object 1 included in the optimal combination determined by the determination unit 35.

The communication unit 37 is a communication interface for connecting the calibration device 3 to the database server 4, the filter measuring device 2, and the like via the network 5.

The database server 4 is configured by a personal computer or the like, and includes a storage unit 41, and the storage unit 41 holds a plurality of combination information for performing calibration of the filter measurement device 2 as a combination table.

Specifically, since the filter measurement device 2 has a measurement error due to a difference between the spectral responsivity and the spectral responsivity as a target such as an isochromatic function, as described above, it is preferable to calculate a correction coefficient using the information of the spectral responsivity of the filter measurement device 2 and the spectral emission characteristics of the measurement object 1, and correct the measurement value, thereby performing the calibration of the filter measurement device 2.

However, there are correction coefficients for each of a plurality of combinations of the spectral emission characteristics of the object 1 to be measured, the filter measuring device 2, and various parameters that are causes of errors. Therefore, in order to calculate an appropriate correction coefficient to perform highly accurate calibration, it is necessary to select an optimal combination from among a plurality of combinations. Further, if the spectral emission characteristics and the like of the object 1 are measured each time and the correction coefficient is estimated from the measurement result, the spectral emission characteristics and the like must be measured each time the object 1 is changed, which is inefficient and requires time for the calibration operation.

In this embodiment, therefore, a plurality of filter measuring devices 2 of different types, a plurality of objects 1 of different types, and a 2 nd color measuring device (hereinafter also referred to as a "spectroscope") 5 based on a spectroscopic color measuring system are combined, and the spectroscopic emission characteristics of the objects 1 are measured in advance by the spectroscope 5. In addition, the spectral responsivity of the filter meter 2 was also measured.

As described above, the object to be measured 1 and the filter measuring instrument 2 are given an object to be measured ID (display type) and a filter measuring instrument ID for specifying them, but in this embodiment, a spectroscopic measuring instrument ID is also given to the spectroscopic measuring instrument 5 as a preferable mode. Then, the obtained spectral emission characteristics, the ID of the spectral measuring device 5 that measured the spectral emission characteristics, the ID of the filter measuring device 2, and the ID of the object 1 to be measured are correlated as a combination table, and stored in the storage unit 41 of the database server 4.

Fig. 2 shows an example of a combination table stored in the database server 4. In the combination table, the filter measurer ID, the measurement object ID (Display Type), the spectroscope measurer ID, and the spectroscope radioactivity are stored in association with each other. Although not shown, the spectral responsivity of each filter meter 2 may be defined in the table in association with the filter meter ID, the object to be measured ID, the spectrometer ID, or the like, or may be stored in the filter meter 2 itself.

By using this combination table, the calibration device 3 receives (Input) the ID of the filter measuring instrument 2 and the ID of the measuring object 1 used in the actual measurement, and can determine (Output) the corresponding spectroradiometer 5 and the spectroradiometer characteristics of the measuring object 1 measured thereby by discriminating the combination including the filter measuring instrument ID and the measuring object ID as the optimum combination from among the combination information in the combination table.

Next, the operation of the calibration device 3 in the calibration system shown in fig. 1 will be described with reference to the flowchart of fig. 3.

First, at the time of factory shipment of the filter measuring instrument 2, the various measuring objects 1, and the various spectroscopes 5 are combined, the spectroradiometric characteristics of the measuring object 1 are measured, and the result is correlated with the filter measuring instrument ID, the measuring object ID, and the spectroradiometer ID, and stored as combined information in the storage unit 41 of the database server 4 as a combined table. The spectral responsivity of the filter meter 2 is also measured, and stored in the filter meter 2 itself or in association with the filter meter ID in the combination table of the database server 4. By repeating this operation, a large amount of combination information is stored in the database server.

The user uses the filter measuring device 2 for shipment to measure the measurement object 1, but the measuring unit 34 of the calibration apparatus 3 acquires measurement data, filter measuring device ID, and spectral responsivity from the filter measuring device 2, and acquires the display type of the measurement object 1 by user input or the like (step S01).

Next, 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 ID and the display type acquired by the measurement unit 34, and determines a combination in which the filter measurement ID and the display type match from the combination information (step S01). Then, the spectroscope 5 and the spectroradiometer characteristic indicated by the spectroscope ID included in the determined combination are determined as the optimal spectroscope 5 and spectroradiometer characteristic corresponding to the filter measuring device 2 and the object 1 to be measured that are actually used (step S01).

For example, in the combination table of fig. 2, if the filter meter ID is a and the display type is the circle number 1, the spectroscope ID is determined as a and the spectroscope emission characteristic is determined as α.

Next, the calibration unit 36 estimates a correction coefficient (corresponding to the 1 st correction coefficient) CM1 using the determined spectral emission characteristic and the spectral responsivity of the filter meter 2 (step S02), and corrects the measurement data (Raw data) using the estimated correction coefficient CM1 (step S03).

As described above, in this embodiment, the optimum combination corresponding to the actually used filter meter 2 and the measurement object 1 is selected from among the plurality of combination information composed of the combination of the filter meter 2, the measurement object 1, the spectroscope 5, and the spectroscope 1 stored in the database server 4 in association in advance, and the spectroscope characteristics included in the selected combination are used for estimation of the correction coefficient at the time of calibration of the filter meter 2, so that even if the filter meter 2 and the measurement object 1 used in the measurement are changed or even if the user does not hold the optimum spectroscope 5, the calibration with high accuracy suited to the conditions can be easily and efficiently performed.

In this embodiment, since the combination information includes the spectrometer ID for specifying the spectrometer 5, when the user holds the spectrometer 5 specified by the spectrometer ID, the spectroradiometer 5 can be used to measure the spectroradiometric property of the object 1 again, and the correction coefficient CM1 can be estimated from the result. In this case, since the spectroscopic emission characteristics have already been obtained, calibration with high traceability (traceability) can be performed.

[ embodiment 2 ]

In embodiment 1 described above, many pieces of combination information specified in the combination table shown in fig. 2 are combination information in which the filter meter ID, the display type of the object 1 to be measured, the spectroscope meter ID, and the spectroscope emission characteristics are associated with each other.

However, since the correction coefficient CM1 also varies depending on the measurement position in the object to be measured, if the measurement position varies, calibration with high accuracy cannot be performed.

Therefore, in this embodiment, the measurement position in the object 1 is changed under various combinations, and the spectroradiometric characteristics are measured in advance, and as shown in the combination table of fig. 4, information for specifying the measurement position is also associated with the filter meter ID, the display type, the spectrometer ID, and the spectroradiometric characteristics and held in the combination table.

The operation of the calibration device 3 in the case of using the combination table of fig. 4 in the calibration system of fig. 1 will be described with reference to the flowchart of fig. 5.

When calibration of measurement of the measurement object 1 using the filter measuring device 2 is performed, the measuring unit 34 of the calibration apparatus 3 acquires measurement data, a filter measuring device ID, and spectral responsivity from the filter measuring device 2, and acquires measurement position information and display type by user input or the like (step S11).

Next, 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 measurer ID acquired by the measurement unit 34, the display type, and the measurement position, and determines a combination in which the filter measurer ID, the display type, and the measurement position match from among the combination information (step S11). Then, the spectroscope 5 and the spectroradiometer characteristic indicated by the spectroscope ID included in the determined combination are determined as the optimal spectroscope 5 and spectroradiometer characteristic corresponding to the filter measuring device 2 and the object 1 to be measured used for the measurement (step S11).

For example, if the filter meter ID is a, the display type is the circle number 1, and the measurement position is the measurement position 1, the spectroscope ID is determined as a, and the spectroscope emission characteristic is determined as α.

Next, the calibration unit 36 estimates a correction coefficient CM1 using the determined spectral emission characteristic and the spectral responsivity of the filter measurement device 2 (step S12), and corrects the measurement data using the estimated correction coefficient CM1 (step S13).

As described above, in this embodiment, the combination information stored in advance in the database server 4 further includes information for specifying the measurement position, so that the optimum combination can be determined in consideration of the measurement position, and more accurate calibration can be performed.

[ embodiment 3 ]

Since the correction coefficient CM1 varies not only depending on the measurement position but also depending on the measurement angle in the object to be measured, if the measurement angle varies, calibration with high accuracy cannot be performed.

Therefore, in this embodiment, measurement is performed in advance by changing not only the measurement position but also the measurement angle in the object 1 under various combinations, and as shown in the combination table of fig. 6, information for specifying the measurement position and the measurement angle is also held in the combination table in association with the filter meter ID, the display type, the spectroscope ID, and the spectroscope radiation characteristic.

The operation of the calibration device 3 in the case of using the combination table of fig. 6 in the calibration system of fig. 1 will be described with reference to the flowchart of fig. 7.

When calibration of measurement of the measurement object 1 using the filter measuring device 2 is performed, the measuring unit 34 of the calibration apparatus 3 acquires measurement data, the filter measuring device ID, and the spectral responsivity from the filter measuring device 2, and acquires information of a measurement position and a measurement angle, and a display type by user input or the like (step S21).

Next, 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 measurer ID, the display type, the measurement position, and the measurement angle acquired by the measurement unit 34, and determines a combination in which the filter measurer ID, the display type, the measurement position, and the measurement angle match from among the combination information (step S21). Then, the spectroscope 5 and the spectroradiometer characteristic indicated by the spectroscope ID included in the determined combination are determined as the optimal spectroscope 5 and spectroradiometer characteristic corresponding to the filter measuring device 2 and the object 1 to be measured used for the measurement (step S21). For example, if the filter meter ID is a, the display type is the circle number 1, the measurement position is the measurement position 1, and the measurement angle is θ, the spectroscope ID is determined as a, and the spectroscope radiation characteristic is determined as α.

Next, the calibration unit 36 estimates a correction coefficient CM1 using the determined spectral emission characteristic and the spectral responsivity of the filter measurement device 2 (step S22), and corrects the measurement data using the estimated correction coefficient CM1 (step S23).

As described above, in this embodiment, since the combination information stored in advance in the database server 4 includes information for specifying the measurement angle in addition to the measurement position, the optimum combination can be determined in consideration of the measurement angle, and the calibration can be performed with higher accuracy.

In addition, the combination table may include only information on the measurement angle, not both the measurement position and the measurement angle.

[ embodiment 4 ]

The spectroscopic measuring device 5 and the filter measuring device 2 are different from each other in comparison of measured values. Accordingly, there is a technique (arbitrary calibration) of calculating a correction coefficient based on the difference in the measured values and applying a correction to the measured data of the filter measuring instrument 2.

Here, when Value [ Spectrometer ] is set as a matrix of stimulus values obtained from spectroscopic data, value [ Filter type measuring instrument ] is set as a matrix of stimulus values of measurement data (Raw data) obtained by a filter measurement device, and CM2 is set as a calibration matrix (2 nd correction coefficient), the following is expressed:

Value[Spectrometer]＝CM2＊Value[Filter type measuring instrument]] …(2)。

the 1 st correction coefficient (CM 1) and the 2 nd correction coefficient (CM 2) do not completely match because the light source (spectrometer) for obtaining the spectral responsivity of the filter meter 2 and the display panel as the object 1 to be measured differ in optical characteristics such as polarization characteristics and directivity.

Therefore, as shown in the explanatory diagram of any calibration in fig. 8, the 1 st correction coefficient (CM 1) and the 2 nd correction coefficient (CM 2) are obtained by measuring the display panel as the same measurement object 1 at the same timing using the spectroscope 5 and the filter measuring device 1 in advance before shipment in the factory. When the obtained difference between CM1 and CM2 is set to the 3 rd correction coefficient (CM 3) as in fig. 9 (a) showing the relationship of the correction coefficients at the time of shipment from the factory, the difference is as in fig. 9 (B) showing the relationship of the correction coefficients at the time of use by the user:

CM2’＝CM1’+CM3＝CM1’+(CM2·CM1) …(3)

here, CM1 'and CM2' represent the 1 st and 2 nd correction coefficients when the user actually uses the filter measuring device. The 3 rd correction coefficient (CM 3) may be obtained by a method of obtaining a ratio of the 1 st correction coefficient (CM 1) to the 2 nd correction coefficient (CM 2) as shown in the following expression (4).

CM2’＝CM1’＊(CM2/CM1)) …(4)

Then, identification Information (ID) is given to the filter measuring instrument 2 and the object 1 to be measured, and the spectral responsivity of each filter measuring instrument 2, the information on the spectral emission characteristics of the filter measuring instrument 2 and the information on the 3 rd correction coefficient (CM 3) used for measuring each object 1 to be measured are respectively associated and held as a combination table.

In actual measurement of the object 1 by the filter measuring device 2, the measuring unit 34 of the calibration apparatus 3 holds the ID of the filter measuring device 2 and the ID of the object 1 to be measured and the acquired measurement data (Raw data) in a group. Then, a combination matching the filter measuring instrument ID and the object ID is determined from the combination information, and the spectrometer ID, the spectral emission characteristic, and the 3 rd correction coefficient (CM 3) included in the combination are determined.

Then, the 1 st correction coefficient (CM 1 ') is estimated from the spectral responsivity and spectral emission characteristics of the filter measurement device 2, the 2 nd correction coefficient (CM 2') is derived from the equation (3) or the equation (4) from the 1 st correction coefficient (CM 1 ') and the 3 rd correction coefficient (CM 3), and the measured value is corrected using the 2 nd correction coefficient (CM 2').

In this way, the 3 rd correction coefficient (CM 3) is held in the combination table, and thus, it is unnecessary to perform any calibration each time before measurement, and the burden on the operator can be reduced.

Other embodiments

While the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

For example, IDs as identification information are added to the filter measuring instrument 2, the object 1, and the like, and the spectral responsivity of each filter measuring instrument 2, the measuring instrument information used for measuring each object 1, and the spectral emission characteristic information are stored in groups (are associated with) these IDs as a combination table. Then, as shown in the flowchart of fig. 10, at the time of actual measurement, the temperature, humidity, place, external light (illuminance of measurement place), external electric field magnetic field, vibration of the measuring instrument, cleanliness of the measurement place, stability of the power supply, and further ID of the worker involved in the measurement, etc. acquired by the external environment measuring instrument 6 provided integrally with or separately from the calibration device 3 are held as a set with the measurement data, and the trend of the measurement environment can be analyzed. The user may add information of the measurement environment (measurement environment parameter) to the combination table read into the determination unit 35. In the flowchart of fig. 10, the same steps are denoted by the same reference numerals as in the flowchart of fig. 5, except that the information of the measurement environment (measurement environment parameter) and the measurement data are held in groups, and detailed description thereof is omitted.

In the case where the same object 1 to be measured is managed using a plurality of filter measuring devices 2, a batch or measuring device in which the measured value is abnormally changed or linearly changed may be found from the batches or measured values of the measuring devices stored in the database server 4, and the failure prediction may be performed in advance.

In the above embodiment, the combination in which the IDs of the filter measuring instrument 2 and the object 1 used for the actual measurement match is selected from the combination information held in the combination table. However, since many pieces of combination information are stored, by using so-called AI (artificial intelligence) or the like, even when the same ID as the object 1 is not present in the combination information, a combination of the objects 1 having similar spectral emission characteristics can be obtained.

In this case, it is preferable that an initial value table for discriminating the weight of the combination of the measurement objects 1 having similar spectral emission characteristics is stored in the database server 4 together with the combination table.

Here, an example of the initial value table of the weight will be described. The initial value table of the weight means a table for determining the ID (display type) of the measurement object having a similar spectral shape even for measurement of a different measurement object (display panel) based on the spectral shape of the spectroscopic emission characteristic of the measurement object, and for example, means a weight coefficient W in a neural network.

An example of a neural network is shown, which is schematically represented as in fig. 11. O1 of FIG. 11 ¹ 、o2 ¹ 、o3 ¹ If the difference is large at each wavelength, 1 is output, and if the difference is small, 0 is output (step function described below: 1 is output if u is larger than the threshold b, and 0 is output if it is small).

[ 1]

In addition, o1 ² 、o2 ² Each of the results was obtained by the following formula.

o1 ² ＝o1 ¹ ＊W11+o2 ¹ ＊W21+o3 ¹ ＊W31

o2 ² ＝o1 ¹ ＊W12+o2 ¹ ＊W22+o3 ¹ ＊W32

Then according to o1 ² 、o2 ² The respective values are judged to be consistent,Inconsistent construction.

When two objects to be measured (display panels) are compared (one is an LED and the other is an OLED), as shown in fig. 12 (a) to (C), there is no difference in relative intensities between the LED and the OLED at 450nm, a slight difference in relative intensities at 550nm, and a large difference in relative intensities at 650 nm.

Based on this premise, a weight coefficient W (initial value table of weight) shown in fig. 13 is determined. In the case of comparing two measurement objects 1, there is no difference at 450nm but there is a difference at 550nm or 650nm (o 1 ¹ ＝0，o2 ¹ ＝1，o3 ¹ =1), at this time, o1 ² 、o2 ² Matching the initial value table (fig. 13) of the weights, the following is found:

o1 ² ＝0＊0.01+1＊0.6+1＊0.9＝1.5

o2 ² ＝0＊0.01+1＊0.3+1＊0.1＝0.4

that is, the probability of inconsistency is 79% [ 1.5/(1.5+0.4)/(100) ], and the probability of inconsistency is 21% [ 0.4/(1.5+0.4)/(100 ].

The above example is a comparative example at a wavelength of 3 sites, but the comparison can be performed with higher accuracy by performing the comparison every 1nm (at 401) over the entire visible light region (380 nm to 780 nm).

By referring to the initial value table of the weights in this way, a combination of measurement objects 1 having commonalities can be selected, and the approximate correction coefficient can be estimated.

In addition, the updating device may automatically create a new combination in which the measurement object IDs are replaced with common measurement object IDs in the selected combination, and store the new combination in the database server. Further, the user may input an evaluation of the approximate combination, and a new combination may be automatically created based on the evaluation and stored in the database server. Thus, even if a user or the like does not create a new combination table, the combination information increases, so that the effort for creating the combination table is reduced.

In the above embodiment, 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. However, as shown in fig. 14, a storage combination table may be stored in a nonvolatile memory (storage unit) 33 in the calibration device 3. In this configuration, 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 that of the calibration device 3 in the calibration system shown in fig. 1, except that the combination information is acquired in the device as described above.

Industrial applicability

The invention can be utilized when performing calibration of a color measuring device of the stimulus value type comprising at least 3 color channels.

Claims

1. A calibration system is provided with:

a storage unit that stores a plurality of pieces of combination information in advance, the plurality of pieces of combination information being formed by associating and combining 1 or more 1 st identification information for specifying 1 st color measuring devices of 1 st or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for specifying 1 or more measurement objects, and spectroscopic emission characteristics of the measurement objects measured by 1 or more 2 nd color measuring devices based on spectroscopic color measurement methods;

a determination unit configured to determine, when calibration of the 1 st color measuring device that measures the object to be measured is performed, an optimal combination of the 1 st color measuring device that measures the object to be measured and a spectroscopic-radiation characteristic of the object to be measured from among the plurality of combination information stored in the storage unit, based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured; and

and a calibration unit configured to correct a measurement value based on the 1 st color measuring device based on the spectral emission characteristics of the measurement object included in the combination determined by the determination unit and the spectral responsivity of the 1 st color measuring device measured.

2. The calibration system of claim 1, wherein,

the combination information is stored in the storage unit in advance as a table.

3. Calibration system according to claim 1 or 2, wherein,

each of the combination information includes information for specifying the measurement position,

the determination unit determines an optimal combination based on the measurement position of the 1 st color measuring device used for measurement.

4. Calibration system according to claim 1 or 2, wherein,

each of the combination information includes information for specifying the measurement angle,

the determination unit determines an optimal combination based on a measurement angle of the 1 st color measuring device used for measurement.

5. Calibration system according to claim 1 or 2, wherein,

each of the combination information includes information of the measurement environment,

the determination unit determines an optimal combination based on the measurement environment of the 1 st color measuring device used for measurement.

6. Calibration system according to claim 1 or 2, wherein,

the determination unit determines a combination of the objects to be measured having similar spectral emission characteristics from among the combination information when the 2 nd identification information indicating the objects to be measured by the 1 st color measuring device does not exist among the combination information stored in the storage unit.

7. The calibration system of claim 6, wherein,

the storage unit stores an initial value table for discriminating the weights of combinations of measurement objects having similar spectral emission characteristics.

8. The calibration system of claim 6, wherein,

the user can input the evaluation of the combination determined by the determination unit.

9. Calibration system according to claim 1 or 2, wherein,

when a correction coefficient based on the spectral emission characteristic of the measurement object and the spectral responsivity of the 1 st color measuring device used in measurement is set as a 1 st correction coefficient, a correction coefficient for calibrating a measurement value based on the 1 st measurement device to a value obtained by the 2 nd measurement device is set as a 2 nd correction coefficient, a correction coefficient for associating the 1 st correction coefficient with the 2 nd correction coefficient is set as a 3 rd correction coefficient, the 3 rd correction coefficient is included in a combination stored in the storage unit,

the calibration unit calculates the 1 st correction coefficient, calculates the 2 nd correction coefficient based on the calculated 1 st correction coefficient and the 3 rd correction coefficient included in the combination determined by the determination unit, and corrects the measurement value using the calculated 2 nd correction coefficient.

10. Calibration system according to claim 1 or 2, wherein,

the spectral responsivity of the 1 st color measuring device is stored in the 1 st color measuring device.

11. Calibration system according to claim 1 or 2, wherein,

the spectral responsivity of the 1 st color measuring device is stored in the storage unit.

12. Calibration system according to claim 1 or 2, wherein,

in the combination information, the 3 rd identification information for specifying the 2 nd color measuring device is combined in association with the 1 st identification information, the 2 nd identification information, and the spectroscopic emission characteristic.

13. A calibration device is provided with:

14. A calibration device, which is used for calibrating a light source,

the calibration device is capable of communicating with an external database device, the external database device comprises a storage unit for storing a plurality of pieces of combination information in advance, wherein the combination information is formed by associating and combining 1 or more 1 st identification information of 1 st color measuring device for respectively identifying 1 or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for identifying 1 or more measuring objects, and spectral radiation characteristics of the measuring objects measured by 1 or more 2 nd color measuring devices based on a spectral color measuring mode,

the calibration device is provided with:

15. Calibration device according to claim 13 or 14, wherein,

16. Calibration device according to claim 13 or 14, wherein,

17. Calibration device according to claim 13 or 14, wherein,

18. Calibration device according to claim 13 or 14, wherein,

19. Calibration device according to claim 13 or 14, wherein,

20. The calibration device of claim 19, wherein,

21. The calibration device of claim 19, wherein,

22. Calibration device according to claim 13 or 14, wherein,

23. Calibration device according to claim 13 or 14, wherein,

24. Calibration device according to claim 13 or 14, wherein,

25. Calibration device according to claim 13 or 14, wherein,

in the combination information, the 3 rd identification information for specifying the 2 nd color measuring device is combined in association with the 1 st identification information, the 2 nd identification information, and the spectroradiometric property.

26. A program for causing a computer of a calibration apparatus to execute a discrimination step and a calibration step,

the calibration device includes a storage unit that stores a plurality of pieces of combination information in advance, each of which is formed by associating 1 or more 1 st identification information for identifying a 1 st color measuring device including 1 or more stimulus value types of at least 3 color channels, 1 or more 2 nd identification information for identifying 1 or more measuring objects, and spectral emission characteristics of the measuring objects measured by 1 or more 2 nd color measuring devices based on a spectral color measuring system,

In the determining step, when the 1 st color measuring device for measuring the object to be measured is calibrated, the best combination of the 1 st color measuring device for measuring the object to be measured, and the spectral emission characteristics of the object to be measured is determined from the combination information stored in the storage means based on the 1 st identification information of the 1 st color measuring device and the 2 nd identification information of the object to be measured,

in the calibration step, the measured value based on the 1 st color measuring device is corrected based on the spectral emissivity of the object to be measured and the spectral responsivity of the 1 st color measuring device measured, which are included in the combination determined by the determination step.

27. A program for causing a computer of a calibration apparatus to execute a discrimination step and a calibration step,

the calibration device is capable of communicating with an external database device provided with a storage unit that stores, in advance, a plurality of pieces of combination information each of which is formed by associating 1 or more 1 st identification information for identifying 1 st color measuring devices of 1 st or more stimulus value types including at least 3 color channels, 1 or more 2 nd identification information for identifying 1 or more measuring objects, and spectroscopic emission characteristics of the measuring objects measured by 1 or more 2 nd color measuring devices based on spectroscopic color measuring methods,