KR102056554B1 - Two-dimensional colorimeter - Google Patents

Abstract

The DMD (light selection unit) selects light from one measurement area among the lights L from the screen (two-dimensional area). The optical sensor unit receives light from a plurality of measurement regions selected by the DMD, and sequentially outputs a signal indicating a photometric amount of each of the plurality of measurement regions. The first calculating unit calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the screen output from the imaging unit. The second calculating unit calculates three stimulus values of each of the plurality of measuring regions using a signal indicating the photometric amount of the plurality of measuring regions output from the optical sensor unit. The third calculating unit performs processing for calculating a correction coefficient of one measuring region using each of three stimulus values calculated by the first calculating unit and the second calculating unit, for each of the plurality of measuring regions. Run it.

Description

Two-dimensional colorimeter

The present invention relates, for example, to techniques for colorizing the screen of a display.

The two-dimensional colorimetric apparatus has a feature capable of simultaneously colorizing a plurality of measurement regions, and is used for colorimetry of two-dimensional regions. A two-dimensional area is a screen of a display, such as a liquid crystal display or an organic light emitting element display, for example.

A two-dimensional colorimetric device has been proposed that focuses on a micromirror array such as a DMD (Digital Micromirror Device) capable of scanning light. For example, Patent Literature 1 enters through an objective lens in which a plurality of micromirrors are two-dimensionally arranged in a two-dimensional color measuring apparatus of a stimulus value direct reading type that measures color at each point in a two-dimensional measurement object. A micromirror array capable of sequentially scanning and reflecting light out of the optical path from the objective lens in three or more different directions, and outside the optical path from the objective lens to the micromirror array, at least three of the micromirror array Two-dimensional sensor unit which receives the light scanned in the reflection direction, and the calculation part which calculates the color in each point in the two-dimensional measurement object from the light intensity measured by each sensor element of each said two-dimensional sensor unit. The colorimetric apparatus is disclosed.

In view of the fact that the spectroscopic sensor can measure the color of the measurement region with high accuracy, a two-dimensional colorimetric device which combines a spectroscopic sensor and an imaging unit for imaging a two-dimensional color image has been proposed. For example, Patent Literature 2 discloses the first, second, and third optical filters for spectroscopy of light from a sample by a three-dimensional colorimeter, and the light passed through the first, second, and third optical filters, respectively, in the sample. Two-dimensional light-receiving detection means for receiving a plurality of measurement points on the surface, spectroscopic detection means for detecting a spectral distribution with respect to light from a specific point among the measurement points, and three stimulus values of the three-dimensional color system based on the detected spectral distribution The three-dimensional light-receiving detection means for the measurement points other than the specific point by using a relationship between the three stimulus value calculating means for calculating a value, and the calculated result of the three-stimulus value and the detection result of the two-dimensional light-receiving detection means at the specific point. Disclosed is a two-dimensional colorimetric system comprising computing means for calculating the three stimulus values from a detection result of.

Similarly, patent document 3 divides and scans the measurement area | region of a measurement object into several area | region, and the scanning optical part which introduces the light from each divided measurement area | region, and from each area | region introduced by the said scanning optical part A light concentrator configured to condense the light of a light source; an optical path separator disposed on the optical path of the condensed light; and a light path separator configured to separate the condensed light into first and second optical paths; Disclosed is a color luminance measuring device including an imaging unit for acquiring image data for each measurement region and a spectroscopic measurement unit arranged on the second optical path and acquiring spectral data for each of the divided measurement regions.

In the chromaticity luminance measuring device of Patent Literature 3, the scanning optical portion is disposed between the measurement target and the optical path separating portion. This is to acquire image data and spectral data based on the same light over the whole area irrespective of the position of the measurement area or the incident direction of the light to be measured (paragraph 0024 of Patent Document 3).

In liquid crystal displays, cold cathode fluorescent lamps (CCFLs) have been used as backlights, but LEDs (Light Emitting Diodes) are increasing in order to reduce power consumption and improve chromaticity. The liquid crystal display uses a plurality of LEDs as a backlight (in a large liquid crystal display, for example, 1000 LEDs are used as a backlight). The spectral radiance luminance of LEDs differs even with the same product. Specifically, among the red LEDs of the same product, there are red LEDs having a peak wavelength of, for example, 600 nm, and red LEDs having a peak wavelength of, for example, 610 nm. For this reason, in a liquid crystal display having a plurality of LEDs as backlights, when red is displayed on the entire screen, the spectral emission luminance varies depending on the position on the screen. Therefore, when a plurality of LEDs are used as the backlight, the chromaticity and the luminance vary depending on the position on the screen of the liquid crystal display.

The organic light emitting device display is a self-luminous display using an organic light emitting diode (OLED). The luminance of each pixel of the display is determined by the film thickness of each layer constituting the OLED and the current flowing through the OLED. However, it is difficult to accurately control the film thickness of each layer constituting the OLED to a desired value. In addition, it is difficult to make the performance of the transistor for controlling the current flowing through the OLED uniform. For these reasons, the chromaticity and the luminance of the organic light emitting diode display vary depending on the position on the screen.

As described above, in the liquid crystal display and the organic light emitting diode display, since chromaticity and luminance vary depending on the position on the screen, nonuniformity occurs in the chromaticity and luminance of the screen. Thus, in the production process of the display, using a two-dimensional colorimetric apparatus, the screen chromaticity and luminance of the display need to be measured and they need to be adjusted. In order to make accurate adjustments, the screen chromaticity and luminance of the display need to be measured accurately.

The two-dimensional colorimetric apparatus disclosed in Patent Literature 2 uses a spectroscopic sensor to measure three stimulus values (true values) of one specific point on a two-dimensional region, and calculates a correction coefficient in advance using these three stimulus values. Using the correction coefficient, three stimulus values of each of the plurality of measurement points on the two-dimensional area measured using the imaging unit are corrected. As a result, accurate measurement of chromaticity and luminance is realized for each of the plurality of measurement points. Hereinafter, a specific point and a measuring point are described as a measurement area.

In order to realize accurate measurement of chromaticity and luminance, it is necessary to correct three stimulus values for each of a plurality of measurement regions. The two-dimensional colorimetric apparatus disclosed by patent document 2 is calculating the correction coefficient on the basis of three stimulus values of one measurement area. If there is no nonuniformity in chromaticity and luminance of the two-dimensional region, it is considered that even with the two-dimensional colorimetric apparatus disclosed in Patent Literature 2, three stimulus values can be accurately corrected for each of the plurality of measurement regions.

However, as described above, the liquid crystal display and the organic light emitting diode display having a plurality of LEDs as backlights are uneven in chromaticity and luminance of the screen. In such a case, even if the two-dimensional colorimetric apparatus corrects three stimulus values of each of the plurality of measurement regions using the correction coefficient calculated using the three stimulus values of one measurement region, accurate chromaticity and luminance cannot be obtained. On the other hand, the two-dimensional colorimetric apparatus disclosed by patent document 3 calculated | required the correction coefficient about each of the some measurement area on the screen of a display (paragraph 0105 of patent document 3). MEANS TO SOLVE THE PROBLEM This inventor created the two-dimensional colorimetry apparatus which can implement the following objectives by the structure different from patent document 3. As shown in FIG.

Japanese Patent Laid-Open No. 2010-117149 Japanese Patent Laid-Open No. 6-201472 Japanese Patent Laid-Open No. 2010-271246

The present invention provides a two-dimensional colorimetric apparatus capable of accurately correcting three stimulus values for each of a plurality of measurement regions included in a two-dimensional region even when there is a variation in chromaticity and luminance of light from the two-dimensional region to be measured. It aims to provide.

The two-dimensional colorimetric apparatus according to the present invention for achieving the above object is a two-dimensional colorimetric apparatus for colorizing a plurality of measurement regions included in the two-dimensional region, and includes an optical system, an imaging unit, a light selection unit, a selection control unit, and an optical sensor unit. And a first calculating unit, a second calculating unit, and a third calculating unit. The optical system forms a first optical path and a second optical path as optical paths of light from the two-dimensional region. The imaging section includes a two-dimensional imaging device, is disposed in the first optical path, and photographs a color image of the two-dimensional region. The light selector is disposed in the second optical path, and selects light from one of the measurement areas, among the light from the two-dimensional area. The selection control section selects light from a plurality of the measurement areas. The optical sensor unit has a function of receiving light from an area having an area less than or equal to the measurement area, receives light from a plurality of the measurement areas selected by the light selection unit, and receives each of the plurality of measurement areas. A signal indicating the metering amount is output. The first calculating unit calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit. The second calculating unit calculates three stimulus values of each of the plurality of measuring regions by using a signal indicating photometric amounts of the plurality of measuring regions output from the optical sensor unit. The third calculating section uses one of the three stimulus values calculated by the first calculating section and the three stimulus values calculated by the second calculating section, for one measurement region, to correct one correction region. Is a correction coefficient calculation processing, and the correction coefficient calculation processing is performed for each of the plurality of measurement areas.

These and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

FIG. 1: is a schematic diagram which shows the state in which the two-dimensional colorimetry apparatus which concerns on this embodiment colorizes the screen of a liquid crystal display.
2 is a schematic view of a screen plane of a liquid crystal display divided into a plurality of measurement regions.
3 is a block diagram showing the configuration of a two-dimensional colorimetric apparatus according to the present embodiment.
4 is an explanatory diagram for explaining that the position of the mirror portion is at the second position.
5 is a plan view of a DMD.
6 is an explanatory diagram for explaining that the DMD selectively reflects light.
It is a schematic diagram of an example of an optical sensor part.
8 is an explanatory diagram illustrating a relationship between a screen measurement area of a liquid crystal display, a pixel of a two-dimensional imaging element, and a micromirror of a DMD.
9 is a flowchart illustrating a correction coefficient acquisition mode in the two-dimensional colorimetric apparatus according to the present embodiment.
FIG. 10 is a flowchart for explaining step S1 of FIG. 9.
FIG. 11 is a flowchart for explaining the process of step S4 in FIG.
12 is a flowchart illustrating a colorimetric mode in the two-dimensional colorimetric apparatus according to the present embodiment.
It is explanatory drawing explaining an example of several measurement area whose total area is smaller than the area of a screen.
14 is a block diagram showing the configuration of a two-dimensional colorimetric apparatus according to a second modification.
It is a schematic diagram of an optical sensor part of a multiband type.
It is explanatory drawing explaining the spectral sensitivity of 1st filter-6th filter.
It is a schematic diagram of an optical sensor part of a spectral type.
It is a schematic diagram of an optical sensor part of a filter rotary type.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing. FIG. 1: is a schematic diagram which shows the state in which the two-dimensional colorimetric apparatus 1 which concerns on this embodiment colorizes the screen SC of a liquid crystal display. The measurement target of the two-dimensional colorimetric device 1 is a two-dimensional area. The two-dimensional colorimetric apparatus 1 is a self-luminous two-dimensional region (the image is displayed by outputting the light by the two-dimensional region itself), or a non-emitting two-dimensional region (the illumination light is irradiated to the two-dimensional region, and the image is reflected by the reflected light. All of them can be measured. The screen SC of the liquid crystal display is an example of a non-light emitting two-dimensional region. The characteristic (for example, chromaticity) regarding the color of the screen SC of the liquid crystal display and the luminance of the screen SC are measured by the two-dimensional colorimetric device 1. Although this embodiment demonstrates taking the side color of the screen SC of a liquid crystal display as an example, it can also apply to the screen side color of another display.

The two-dimensional colorimetric device 1 virtually divides the screen SC into a plurality of measurement areas, and colorizes the plurality of measurement areas at the same time. This will be described in detail. 2 is a schematic view of a plane of the screen SC of a liquid crystal display. The screen SC is divided into 40 measurement areas 20-1 to 20-40, for example. When not distinguishing these measurement areas, it describes as the measurement area 20. FIG. The screen SC is composed of a plurality of pixels. A plurality of adjacent pixels may be one measurement region 20, and one pixel may be one measurement region 20.

The two-dimensional colorimetric apparatus 1 colorizes 40 measurement areas 20 simultaneously. This is for the two-dimensional colorimetric device 1 to colorize the entire screen SC. In addition, the two-dimensional colorimetric device 1 may colorize a part of the screen SC. In this case, two or more and less than 40 measurement areas 20 (for example, five measurement areas 20) become the plurality of measurement areas 20.

The structure of the two-dimensional colorimetric apparatus 1 is demonstrated in detail. 3 is a block diagram showing the configuration of the two-dimensional colorimetric device 1 according to the present embodiment. The two-dimensional colorimetric device 1 includes the objective optical system 2, the mirror unit 3, the switching unit 4, the imaging unit 5, the DMD 6, the condensing optical system 7, the optical sensor unit 8, and control. A processing unit 9, an input unit 10, and an output unit 11 are provided.

The objective optical system 2 includes an optical lens and focuses the light L from the entire screen SC. The screen SC is in a state in which the entirety of the screen SC is emitted in a predetermined color (for example, red color).

The optical system is constituted by the mirror portion 3 and the switching portion 4. The optical system forms the first optical path 21 and the second optical path 22 as optical paths of the light L from the screen SC.

The switching section 4 rotates the mirror section 3 by a predetermined angle with one side of the mirror section 3 as the central axis, thereby switching the position of the mirror section 3 to the first position and the second position. do. For example, a step motor, a rotary solenoid, or the like can be used as the switching unit 4.

3 shows that the position of the mirror portion 3 is in the first position. The first position is a position where the mirror portion 3 can reflect the light L focused by the objective optical system 2, and the light L focused by the objective optical system 2 is transmitted to the first optical path ( 21). The mirror portion 3 is a total reflection mirror.

FIG. 4 is an explanatory diagram for explaining that the position of the mirror portion 3 is in the second position in the block diagram shown in FIG. 3. The second position is a position where the mirror portion 3 cannot reflect the light L focused by the objective optical system 2, and the light L focused by the objective optical system 2 is transferred to the second optical path ( 22). 4 differs from FIG. 3 in that the light L is guided to the second optical path 22 and is reflected by the DMD 6.

3, the imaging unit 5 is disposed in the first optical path 21. The imaging unit 5 is disposed at a position where the light L from the screen SC forms an image. The imaging unit 5 includes a color filter 51 and a two-dimensional imaging element 52. The color filter 51 is comprised by the filter which transmits only R component, the filter which transmits only G component, and the filter which transmits only B component.

The two-dimensional imaging element 52 is, for example, a charge coupled device (CCD) or a complementary MOS (CMOS), and is an optical sensor having a two-dimensional area as a measurement range. By receiving the light L through the color filter 51, the two-dimensional imaging element 52 captures a color image of the entire screen SC, and outputs an electrical signal indicating information of the picked color image. This is the color image information signal SG1 output by the imaging unit 5. The color filter 51 includes a plurality of R filters having a spectral transmittance Fr (λ), a plurality of G filters having a spectral transmittance Fg (λ), and a plurality of B filters having a spectral transmittance Fb (λ). These filters are arranged in a checkered shape. Each pixel constituting the two-dimensional imaging element 52 receives light L that has passed through any one of the R filter, the G filter, and the B filter.

Referring to FIG. 4, a digital micromirror device (DMD) 6 is disposed in the second optical path 22. The DMD 6 selectively reflects the light L traveling through the second optical path 22 toward the condensing optical system 7. The DMD 6 is an example of the light selection unit. The light selection unit is disposed in the second optical path 22 and selects the light La from one measurement area 20 (FIG. 2) among the lights L from the screen SC.

The light selection unit can be realized by a spatial light modulator such as the DMD 6. In addition, a spatial light modulator (liquid crystal spatial light modulator) using a liquid crystal may be used as a light selector. The liquid crystal has a transmission type for selectively transmitting incident light and a reflection type (LCOS: Liquid Crystal On Silicon) for reflection. Any form can be applied to this embodiment.

The DMD 6 will be described in detail. 5 is a plan view of the DMD 6. 6 is an explanatory diagram for explaining that the DMD 6 selectively reflects light. 5 and 6, the DMD 6 has a structure in which a plurality of micromirrors 61 are arranged in a matrix shape. The angle at which the micromirror 61 reflects the light L traveling through the second optical path 22 toward the condensing optical system 7 (that is, the angle which reflects toward the optical sensor unit 8) is referred to as a selection angle. do. In contrast, the angle at which the micromirror 61 does not reflect the light L traveling through the second optical path 22 toward the condensing optical system 7 (that is, the angle at which the micromirror 61 does not reflect toward the optical sensor unit 8). ) Is called the non-selection angle.

The DMD 6 is light La from one measurement region 20 (for example, the measurement region 20-1) shown in FIG. 2 among the light L traveling through the second optical path 22. ) Is selectively reflected, the angle of the micromirror 61 corresponding to the measurement area 20 (measurement area 20-1) is referred to as the selection angle, and the angle of the micromirror 61 other than this is It is called non-selection angle. The light La is reflected toward the condensing optical system 7 by the micromirror 61 at the selected angle. In FIG. 6, the angle of one micromirror 61 is a selection angle, but the end area of the light La at the position where the light La is reflected from the micromirror 61 (the progress of the light L). The number of micromirrors 61 which become a selection angle is determined according to the area of the cross section perpendicular | vertical to a direction.

Referring to FIG. 4, the condensing optical system 7 includes an optical lens and condenses the light La selectively reflected by the DMD 6 to the optical sensor unit 8.

The optical sensor part 8 is arrange | positioned in the position where the light La from one measurement area | region 20 is imaged among the light L from the screen SC. As shown in FIG. 2, the optical sensor unit 8 has a function of receiving light from an area (so-called spot area 23) having an area of one measurement area 20 or less, and measuring one. The light La from the area 20 is received, and an electric signal indicating the photometric amount of one measurement area 20 is output. This electrical signal is the signal SG2 shown in FIG.

The optical sensor unit 8 is used for color measurement with higher accuracy than that for which the imaging unit 5 is used. 7 is a schematic diagram of an example of the optical sensor unit 8. The optical sensor unit 8 includes photodiodes 80a, 80b, 80c, an X filter 87a, a Y filter 87b, and a Z filter 87c. The photodiode 80a receives light La passing through the X filter 87a, the photodiode 80b receives light La passing through the Y filter 87b, and the photodiode 80c The light La passing through the Z filter 87c is received.

In the XYZ color system of the CIE (International Illumination Commission) standard, three stimulus values are called X, Y, and Z, and the orange color functions are called x (λ), y (λ) and z (λ). The spectral sensitivity obtained by combining the spectral sensitivity of the X filter 87a and the spectral sensitivity of the photodiode 80a becomes the spectral sensitivity that matches the orange color function x (λ). The spectral sensitivity obtained by combining the spectral sensitivity of the Y filter 87b and the spectral sensitivity of the photodiode 80b is the spectral sensitivity that matches the orange color function y (λ). The spectral sensitivity obtained by combining the spectral sensitivity of the Z filter 87c with the spectral sensitivity of the photodiode 80c becomes the spectral sensitivity that matches the orange color function z (λ). Spectral sensitivity can be referred to as spectral response.

When the photodiode 80a receives the light La that has passed through the X filter 87a, the photodiode 80a outputs a light receiving signal representing X. When the photodiode 80b receives the light La which has passed through the Y filter 87b, the photodiode 80b outputs a light reception signal indicating Y. When the photodiode 80c receives the light La which has passed through the Z filter 87c, the photodiode 87c outputs a light receiving signal representing Z. These light reception signals are sent to the control processing part 9 as signal SG2 which shows the photometric amount of one measurement area 20, as shown in FIG.

Referring to FIG. 3, the control processing unit 9 is a microcomputer realized by a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), or the like. The control processing unit 9 is a function block, which includes a selection control unit 91, a first operation unit 92, a second operation unit 93, a third operation unit 94, a storage unit 95, a correction unit 96, A luminance chromaticity calculator 97 and a mode setting unit 98 are provided.

The selection control unit 91 causes the DMD 6 to select light from the plurality of measurement regions 20 by controlling the DMD 6 (an example of the light selection unit). This will be described in detail. FIG. 8: is explanatory drawing explaining the relationship between the measurement area | region 20 of the screen SC, the pixel 53 of the two-dimensional imaging element 52, and the micromirror 61 of the DMD6. The screen SC is virtually divided into m × n measurement areas 20. In the y direction (vertical direction) of the screen SC, the number of the measurement areas 20 is m, and in the x direction (horizontal direction) of the screen SC, the number of the measurement areas 20 is n. The screen SC has a structure in which a plurality of pixels 24 are arranged in a matrix. One measurement area 20 is constituted by a plurality of adjacent pixels 24. In the present embodiment, the number of pixels constituting one measurement region 20 is described as an example.

The two-dimensional imaging element 52 is composed of m × n pixels 53. In the y direction (vertical direction) of the two-dimensional imaging element 52, the number of pixels 53 is m, and in the x direction (horizontal direction) of the two-dimensional imaging element 52, the number of pixels 53 is n. to be.

The DMD 6 is composed of m × n micromirrors 61. The number of micromirrors 61 is m in the y direction (vertical direction) of the DMD 6, and the number of micromirrors 61 is n in the x direction (horizontal direction) of the DMD 6.

Each position of the measurement area 20, the pixel 53, and the micromirror 61 is specified by coordinates (i, j). i is an x coordinate value and is an integer of 1-n. j is a y coordinate value and is an integer of 1-m. For example, each position of the measurement area 20-1, the pixel 53-1, and the micromirror 61-1 is coordinates (1, 1).

In the present embodiment, for the sake of simplicity, the number of measurement regions 20, the number of pixels 53 of the two-dimensional imaging element 52, and the micromirror 61 of the DMD 6 are provided in the x direction. In the y-direction, the number of? Is the same, the number of the measurement regions 20, the number of pixels 53 of the two-dimensional imaging device 52, and the number of micromirrors 61 of the DMD 6 are the same. The measurement area 20, the pixel 53, and the micromirror 61 are made to correspond one-to-one. For example, the measurement area 20-1 located at the coordinates (1,1), the pixel 53-1 located at the coordinates (1,1), and the micromirror located at the coordinates (1,1) (61-1) corresponds. Thereby, the pixel 53-1 can receive the light La (FIG. 4) from the measurement area 20-1, and the micromirror 61-1 can receive the light from the measurement area 20-1. The light La may be reflected.

In the present embodiment, for the sake of simplicity, the pixel count of the screen SC of the liquid crystal display is 5 * 8, the pixel count of the two-dimensional imaging element 52 is 5 * 8, and the pixel count of the DMD 6 is 5 * 8. Doing. In the general formula, the number of pixels of the screen SC of the liquid crystal display is m_display (vertical) * n_display (horizontal direction), the number of pixels of the two-dimensional imaging element 52 is m_2d (vertical) * n_2d (horizontal direction), and the DMD 6 The number of pixels is m_dmd (vertical) * n_dmd (horizontal direction). For simplicity, m_display = m_2d = m_dmd and n_display = n_2d = n_dmd.

4, 6, and 8, the selection control unit 91 controls the DMD 6, so that the micromirror 61 (that is, the micromirror 61-1) located at the coordinates 1, 1 is provided. Angle is set to the selection angle, and the angle of the micromirror 61 other than this is set to the non-selection angle. Thereby, the light La from the measurement area | region 20 (namely, the measurement area | region 20-1) located in the coordinates (1,1) is the micromirror 61 located in the coordinates (1,1). (I.e., it is reflected by the micromirror 61-1), and it faces the light converging optical system 7. As shown in FIG. Subsequently, the selection control unit 91 controls the DMD 6 to set the angle of the micromirror 61 positioned at the coordinates 2 and 1 as the selection angle, and to set the angle of the micromirror 61 other than this. Set the angle. Thereby, the light La from the measurement area | region 20 located in the coordinates 2 and 1 is reflected by the micromirror 61 located in the coordinates 2 and 1, and the light converging optical system 7 Headed. The same control is also applied to each of the micromirrors 61 positioned at the coordinates 3, 1 to n, m. As a result, the optical sensor unit 8 sequentially receives light from the plurality of measurement regions 20 sequentially selected by the DMD 6, and measures the measurement region 20 for each of the plurality of measurement regions 20. The signal SG2 indicating the photometric amount of is sequentially output.

As described above, the selection control unit 91 converts light from the plurality of measurement regions 20 for each light from one measurement region 20 (in other words, light from one measurement region 20). In units), and the DMD 6 is selected one after the other. In the present embodiment, the selection control unit 91 selects the light from the plurality of measurement regions 20 to the DMD 6 in a predetermined order, but may select randomly.

The 1st calculating part 92, the 2nd calculating part 93, and the 3rd calculating part 94 shown in FIG. 3 are demonstrated. In the XYZ color system, three stimulus values are referred to as X, Y, and Z, and the orange color functions are referred to as x (λ), y (λ), and z (λ). The color filter spectral transmittances for obtaining X, Y and Z are called Fx (λ), Fy (λ) and Fz (λ), respectively. The spectral response of the two-dimensional imaging device 52 is called Sm (λ). In the measurement region 20 located at the coordinate (i, j) shown in FIG. 8, the spectral radiance luminance of the measurement region 20 is called E (i, j, lambda), and the measurement region 20 X, Y and Z are referred to as X (i, j), Y (i, j) and Z (i, j), respectively.

Sm (λ) * Fx (λ), Sm (λ) * Fy (λ) and Sm (λ) * Fz (λ) are the synthetic spectral response diagrams, respectively. Optical filter with Fx (λ) that can match Sm (λ) * Fx (λ) and ∫x (λ), Fy that can match Sm (λ) * Fy (λ) and ∫y (λ) If the optical filter having (λ) and the optical filter having Fz (λ) capable of matching Sm (λ) * Fz (λ) and ∫z (λ) can be realized, the following equation 1 is established.

In practice, however, it is difficult to produce a color filter that completely matches the orange color function, and in fact, the above equation does not hold. Therefore, it is necessary to correct using the correction matrix coefficient A (i, j) as shown in the following expression (2).

The correction matrix coefficients A (i, j) are 3x3 matrices and differ according to the coordinates (i, j). Here, the reason why the correction matrix coefficient is A (i, j) is that the spectral radiance luminance varies from place to place due to the influence of color unevenness and luminance unevenness of the display device.

In addition, instead of attaching a filter that matches the orange color function to the two-dimensional colorimetric device 1, a color filter (preferably each color filter spectral transmittance is Fr (λ)) mounted in the commercially available two-dimensional imaging element 52 It is also possible to color-measure using, Fg (λ) and Fb (λ), in which case Equation 2 can be rewritten into Equation 3 below.

∫Sm ([lambda]) * Fr ([lambda]) * E (i, j, [lambda]) d [lambda] denotes an R signal corresponding to the coordinate (i, j), which is output from the two-dimensional imaging element 52.

∫Sm ([lambda]) * Fg ([lambda]) * E (i, j, [lambda]) d [lambda] denotes a G signal corresponding to the coordinates (i, j) output from the two-dimensional imaging element 52. FIG.

∫Sm ([lambda]) * Fb ([lambda]) * E (i, j, [lambda]) d [lambda] denotes a B signal corresponding to the coordinate (i, j) output from the two-dimensional imaging element 52. FIG.

∫Sm (λ) * Fr (λ) * E (i, j, λ) dλ is denoted R (i, j).

∫Sm (λ) * Fg (λ) * E (i, j, λ) dλ is denoted as G (i, j).

∫Sm (λ) * Fb (λ) * E (i, j, λ) dλ is denoted B (i, j).

Equation 3 can be modified as follows.

In general, the RGB color filter has a higher spectral transmittance than the XYZ color filter. For this reason, when an RGB color filter is used as the color filter 51 of the imaging part 5, the exposure time at the time of imaging the screen SC by the imaging part 5 can be shortened, and as a result, side coloration It can save time. Therefore, the present embodiment uses equation 4, RGB of the measurement area 20 located at coordinates (i, j), and three stimulus values XYZ of the measurement area 20 located at coordinates (i, j). The correction matrix coefficient A (i, j) is obtained.

Referring to FIG. 3, the first calculating unit 92 calculates the photometric amount RGB of each of the plurality of measurement regions 20 using the color image information signal SG1 of the screen SC output from the imaging unit 5. do. Thus, the 1st calculating part 92 calculates R (i, j), G (i, j), and B (i, j) shown by Formula 4 with respect to the measurement area | region 20 located in each coordinate. Calculate

The second calculating unit 93 calculates three magnetic pole values XYZ of each of the plurality of measuring regions 20 using the signal SG2 indicating the photometric amount of the measuring region 20 sequentially output from the optical sensor unit 8. . Thus, the 2nd calculating part 93 calculates X (i, j), Y (i, j), Z (i, j) represented by Formula 4 with respect to the measurement area | region 20 located in each coordinate. Calculate

The third calculating unit 94 calculates the correction matrix coefficient A (i, j) shown in equation (4). That is, the third calculating unit 94 calculates the photometric amount RGB calculated by the first calculating unit 92 and the three stimulus values XYZ calculated by the second calculating unit 93 in one measurement area 20. In this case, a process of calculating the correction coefficient of one measurement region 20 is referred to as a correction coefficient calculation process, and a correction matrix coefficient calculation process is performed for each of the plurality of measurement regions 20. As a result, the two-dimensional colorimetric device 1 acquires a plurality of correction coefficients (correction matrix coefficients A (1,1) to correction matrix coefficients A (n, m)) corresponding to each of the plurality of measurement regions 20. . Referring to FIG. 8, for example, in the case of the measurement area 20-1 positioned at the coordinates 1 and 1, the third calculation unit 94 is the measurement area 20 calculated by the first calculation unit 92. The correction matrix coefficient A (1,1) is calculated by using the photometric amount RGB of -1) and the three stimulus values XYZ of the measurement region 20-1 calculated by the second calculation unit 93.

Referring to FIG. 3, a plurality of correction coefficients (correction matrix coefficients A (1,1) to correction matrix coefficients A (n, m)) calculated by the third calculation unit 94 are stored in the storage unit 95. .

The two-dimensional colorimetric device 1 can execute a correction coefficient acquisition mode for acquiring a plurality of correction coefficients in advance, and a colorimetric mode for colorizing (color, luminance, etc.) the plurality of measurement regions 20 using these correction coefficients. have. The mode setting unit 98 selectively sets the correction coefficient acquisition mode and the colorimetric mode. In the correction coefficient acquisition mode, the first calculation unit 92 uses the color image information signal SG1 of the screen SC output from the imaging unit 5 to calculate the photometric amount RGB of each of the plurality of measurement regions 20. The second calculation unit 93 calculates the three stimulus values XYZ of each of the plurality of measurement regions 20 using the signal SG2 indicating the photometric amount of the measurement region 20 sequentially output from the optical sensor unit 8. , The third calculation unit 94 calculates a plurality of correction coefficients corresponding to each of the plurality of measurement areas 20, and the storage unit 95 calculates the plurality of corrections calculated by the third calculation unit 94. Each of the coefficients is stored in association with the plurality of measurement areas 20.

In the colorimetric mode, the first calculating unit 92 calculates the photometric amount RGB of each of the plurality of measurement regions 20 using the color image information signal SG1 of the screen SC output from the imaging unit 5. .

The correction unit 96 associates the photometric amount RGB calculated by the first calculation unit 92 in the colorimetric mode with respect to one measurement region 20 to the storage unit 95 in association with one measurement region 20. The process of correcting using the stored correction coefficients is a correction process, and in the colorimetric mode, correction processing is performed for each of the plurality of measurement regions 20. In this correction process, equation 4 is used, and the photometric amount RGB is three magnetic pole values XYZ.

The luminance chromaticity calculator 97 calculates the luminance and chromaticity of each of the plurality of measurement regions 20 using the three stimulus values XYZ of each of the plurality of measurement regions 20 obtained by the correction unit 96. For example, in the case of the Yxy colorimetric system, it is calculated by the following formula.

Luminance Y = Y

Chromaticity x = X / (X + Y + Z)

Chromaticity y = Y / (X + Y + Z)

The input unit 10 is a device for inputting a command (command), data, or the like into the two-dimensional colorimetric device 1 from the outside, and is realized by a keyboard. In addition, a mouse or a touch panel may be used as the input unit 10. The output unit 11 is an apparatus for outputting a command input from the input unit 10, a calculation result of the data and control processing unit 9, and the like, and is realized by a display. In addition, a printing device such as a printer may be used as the output unit 11. The calculation result of the control processing unit 9 includes the luminance and chromaticity of each of the plurality of measurement regions 20 calculated by the luminance chromaticity calculation unit 97.

The operation of the two-dimensional colorimetric apparatus 1 according to the present embodiment will be described. This operation includes a correction coefficient acquisition mode and a colorimetric mode. First, the former will be described. 9 is a flowchart illustrating a correction coefficient acquisition mode in the two-dimensional colorimetric apparatus 1 according to the present embodiment. This mode includes step S1 of acquiring data regarding red of screen SC, step S2 of acquiring data of green of screen SC, step S3 of acquiring data of blue color of screen SC, and It consists of step S4 which calculates several correction coefficients using these data.

FIG. 10 is a flowchart for explaining step S1 of FIG. 9. 3 and 10, the operator of the two-dimensional colorimetric apparatus 1 inputs a command to execute the correction coefficient acquisition mode using the input unit 10, so that the mode setting unit 98 enters the correction coefficient acquisition mode. Set it.

By the control signal from the personal computer (not shown), the whole screen SC is displayed in red (step S11). There is a liquid crystal display having a screen SC and a personal computer for controlling the two-dimensional colorimetric device 1. When the operator of the personal computer operates the personal computer, the control signal is transmitted to the liquid crystal display having the screen SC. Moreover, the aspect which transmits the said control signal to the liquid crystal display which has the screen SC is also possible because the two-dimensional colorimeter 1 is equipped with the display control circuit of a display.

The selection control part 91 controls the switching part 4, and makes the position of the mirror part 3 into the 1st position shown in FIG. 3 (step S12).

The control processing unit 9 commands the imaging unit 5 to photograph a color image. Thereby, the imaging part 5 picks up the color image of the whole screen SC, and outputs the color image information signal SG1 (step S13). Since the entirety of the screen SC is displayed in red, a color image of the red screen SC is obtained.

The control processing unit 9 receives the color image information signal SG1 output in step S13. The 1st calculating part 92 calculates the photometric amount RGB of the measurement area | region 20 with respect to all of the m x n measurement areas 20 shown in FIG. 8 using this received signal SG1 (step S14). ). This is the photometric amount RGB when the whole screen SC is displayed in red, and is described as Rr (i, j), Gr (i, j), and Br (i, j). For example, with reference to FIG. 8, in the case of the measurement area 20-1 located at the coordinates (1, 1), the first calculation unit 92 includes the pixel 53-located at the coordinates (1, 1). Using the signal output from 1), Rr (1,1), Gr (1,1) and Br (1,1) of the measurement area 20-1 are calculated.

4 and 10, the selection control unit 91 controls the switching unit 4 to set the position of the mirror unit 3 to the second position shown in FIG. 4 (step S15).

The control processing unit 9 sets the x coordinate value i to 1 and the y coordinate value j to 1 (step S16).

The control processing unit 9 controls the DMD 6 to adjust the angle of the micromirror 61 positioned at the coordinates (i, j) shown in FIG. 8 among the micromirrors 61 constituting the mirror unit 3. Let it be a selection angle, and let the angle of the remaining micromirror 61 be a non-selection angle (step S17). Here, the angle of the micromirror 61-1 located in the coordinates (1, 1) becomes a selection angle.

4 and 7, the optical sensor unit 8 receives the light La reflected from the micromirror 61-1, and performs photometric measurement of the measurement region 20 located at the coordinates i and j. It outputs as signal SG2 which shows quantity. Since the coordinates (1, 1) are selected, the optical sensor unit 8 outputs a signal SG2 indicating the photometric amount of the measurement region 20-1 located at the coordinates (1, 1).

4 and 10, the second calculating unit 93 uses the signal SG2 received by the control processing unit 9 to determine three stimulus values XYZ located at coordinates (i, j) shown in FIG. 8. It calculates (step S18). This is tristimulus value XYZ in the state in which the whole screen SC is displayed in red, and describes Xr (i, j), Yr (i, j), and Zr (i, j). For example, with reference to FIG. 8, in the case of the measurement area | region 20-1 located in the coordinates (1, 1), the 2nd calculating part 93 uses the signal SG2 output from the optical sensor part 8, for example. Thus, Xr (1,1), Yr (1,1) and Zr (1,1) of the measurement region 20-1 are calculated.

4 and 10, the control processing unit 9 determines whether the x coordinate value i is n (step S19).

When it determines with x coordinate value i not being n (NO in step S19), the control processing part 9 sets i + 1 as x coordinate value i (step S20). Then, the control processing unit 9 returns to step S17.

When the control processing unit 9 determines that the x coordinate value i is n (YES in step S19), it determines whether or not the y coordinate value j is m (step S21).

When it determines with y coordinate value j not being m (NO in step S21), the control process part 9 sets j + 1 as y coordinate value j (step S22). Then, the control processing unit 9 returns to step S17.

When it determines with y coordinate value j being m (YES in step S21), the control processing part 9 complete | finishes the process of step S1 shown in FIG. And the arithmetic control unit starts the process of step S2 shown in FIG. In a state where the entire screen SC is displayed in green by a control signal from a personal computer (not shown), the two-dimensional colorimetric device 1 performs the same processing as that in steps S12 to S22 in FIG. Thereby, the 1st calculating part 92 calculates Rg (i, j), Gg (i, j), and Bg (i, j) in step S14. This is the metering amount RGB in the state where the whole of the screen SC is displayed in green. The second calculating unit 93 calculates Xg (i, j), Yg (i, j) and Zg (i, j) in step S18. This is tristimulus value XYZ in the state in which the whole screen SC is displayed in green.

The control processing part 9 starts the process of step S3 of FIG. 9 after performing the process of step S2 of FIG. With the control signal from the personal computer (not shown), the two-dimensional colorimetric device 1 performs the same processing as that of step S12 to step S22 in FIG. 10 in a state where the entire screen SC is displayed in blue. Thereby, the 1st calculating part 92 calculates Rb (i, j), Gb (i, j), and Bb (i, j) in step S14. This is the metering amount RGB in the state where the whole screen SC is displayed in blue. In addition, the second calculation unit 93 calculates Xb (i, j), Yb (i, j) and Zb (i, j) in step S18. This is tristimulus value XYZ in the state in which the whole screen SC is displayed in blue.

The control processing part 9 starts step S4 of FIG. 9 after completion of step S3 of FIG. FIG. 11 is a flowchart for describing the process of step S4 of FIG. 9. The third calculating unit 94 sets the x coordinate value i to 1 and the y coordinate value j to 1 (step S31).

The third calculation unit 94 calculates the correction matrix coefficient A (i, j) (step S32). The third calculating unit 94 calculates the correction matrix coefficient A (i, j) using the following expressions 5 to 7.

Here, the third calculation unit 94 uses the value obtained in step S1 of FIG. 9, the value obtained in step S2 of FIG. 9, and the value obtained in step S3 of FIG. 9, to calculate the correction matrix coefficient A (1,1). ) Is calculated.

The value obtained in step S1 of FIG. 9 is Xr (1,1) obtained from the optical sensor unit 8, Yr (1,1) and Zr (1,1), and Rr (obtained from the two-dimensional imaging element 52). 1,1), Gr (1,1) and Br (1,1).

The value obtained in step S2 of FIG. 9 is Xg (1,1) obtained from the optical sensor unit 8, Yg (1,1) and Zg (1,1), and Rg (obtained from the two-dimensional imaging element 52. 1,1), Gg (1,1) and Bg (1,1).

The value obtained in step S3 of FIG. 9 is Xb (1,1), Yb (1,1) and Zb (1,1) obtained from the optical sensor unit 8, and Rb (obtained from the two-dimensional imaging element 52. 1,1), Gb (1,1) and Bb (1,1).

Since the correction matrix coefficients A (1,1) are 3 * 3 matrices, there are nine unknowns. In equations (5) to (7), since nine equations exist, the correction matrix coefficients A (1,1) are obtained by solving nine simultaneous equations.

The third calculating unit 94 determines whether the x coordinate value i is n (step S33).

When it determines with x coordinate value i not being n (NO in step S33), the 3rd calculating part 94 sets i + 1 as x coordinate value i (step S34). And the 3rd calculating part 94 returns to step S32.

When it determines with x coordinate value i being n (YES in step S33), the 3rd calculating part 94 determines whether or not y coordinate value j is m (step S35).

When it determines with y coordinate value j not being m (NO in step S35), the 3rd calculating part 94 sets j + 1 as y coordinate value j (step S36). And the 3rd calculating part 94 returns to step S32.

When it determines with y coordinate value j being m (YES in step S35), the 3rd calculating part 94 complete | finishes the process of step S4 of FIG.

The third calculation unit 94 stores each of the plurality of correction coefficients calculated in step S32 in the storage unit 95 in association with the plurality of measurement areas 20.

By the above, the two-dimensional colorimetric apparatus 1 can acquire the correction coefficients (correction matrix coefficient A (1,1) to correction matrix coefficient A (n, m)) for every measurement area 20 of the screen SC. have. Next, the mode (coloring mode) which color-measures the measurement area 20 using the acquired correction coefficient is demonstrated. 12 is a flowchart for explaining the colorimetric mode.

3 and 12, the mode setting unit 98 sets the colorimetric mode by an operator of the two-dimensional colorimetric device 1 inputting a command for executing the colorimetric mode using the input unit 10. The entire surface of the screen SC is displayed in a predetermined color. The selection control part 91 controls the switching part 4, and makes the position of the mirror part 3 into the 1st position shown in FIG. 3 (step S41). This is the same process as step S12 shown in FIG.

The control processing unit 9 commands the imaging unit 5 to photograph a color image. Thereby, the imaging part 5 picks up the color image of the whole screen SC, and outputs the color image information signal SG1 (step S42). This is the same process as step S13 shown in FIG.

The control processing unit 9 receives the signal SG1 output in step S42. The 1st calculating part 92 calculates the photometric amount RGB of the measurement area | region 20 with respect to all the m x n measurement areas 20 shown in FIG. 8 using this received signal SG1 (step S43). ). This is the same process as step S14 shown in FIG.

The correction unit 96 performs m × n correction coefficients (correction matrix coefficients A (1,1) to correction matrix coefficients A (n, m)) previously stored in Equation 4 and the storage unit 95 at step S43. Using the calculated result, the photometric amount RGB of each of the m × n measurement areas 20 is corrected (step S44). For example, in the case of the measurement area 20 located at the coordinates (1, 1), if the photometric amount RGB is corrected, R (1,1), G (1,1), B (1,1), correction Using matrix coefficients A (1,1) and equation 4, X (1,1), Y (1,1), and Z (1,1) are obtained.

The luminance chromaticity calculator 97 calculates luminance and chromaticity for each of the m × n measurement areas 20 using the result of step S44 (step S45). The output unit 11 outputs the luminance and chromaticity calculated in step S45. The above is a description of the colorimetric mode.

Referring to FIG. 8, when there is a non-uniformity in chromaticity and luminance of the screen SC, the two-dimensional colorimetric device 1 determines the three stimulus values XYZ of one measurement area 20 (typically, the center area of the display). Even if the photometric amount RGB of each of the m × n measurement areas 20 is corrected using the correction coefficient calculated in advance, the chromaticity and luminance cannot be accurately obtained. In contrast, according to the present embodiment, m × n correction coefficients corresponding to each of the m × n measurement regions 20 (that is, correction matrix coefficients A (1,1) to correction matrix coefficients A (n, m) ) Is calculated in advance, and the photometric amount RGB of each of the m × n correction areas is corrected by a corresponding correction coefficient. For this reason, even when there is a nonuniformity in chromaticity and luminance of the screen SC, the metering amount RGB can be corrected accurately for each of the m × n measurement areas 20.

In the present embodiment, the two-dimensional colorimetric device 1 colors all of the m × n measurement areas 20 shown in FIG. 8. This is a case where the total area of the plurality of measurement areas 20 is equal to the area of the screen SC. It is also possible if the total area of the plurality of measurement areas 20 is smaller than the area of the screen SC. This will be described as a first modification of the present embodiment. FIG. 13: is explanatory drawing explaining an example of the some measurement area | region 20 whose total area is smaller than the area of the screen SC. In FIG. 13, five measurement regions 20-a, 20-b, 20-c, 20-d, and 20-e are shown as the plurality of measurement regions 20. The number of the some measurement area | regions 20 should just be 2 or more, and is not limited to 5.

The first modified example is different from the present embodiment. First, the correction coefficient acquisition mode of the first modification will be described. 3 and 13, in the correction coefficient acquisition mode, the operator of the two-dimensional colorimetric apparatus 1 uses the input unit 10 to display the screens of the plurality of measurement regions 20-a to 20-e, respectively. (SC) Input the position designating.

The coordinate where the measurement area 20-a is located is (ax, ay), the coordinate where the measurement area 20-b is located is (bx, by), and the measurement area 20-c is located. The coordinate is set to (cx, cy), the coordinate on which the measurement area 20-d is located is (dx, dy), and the coordinate on which the measurement area 20-e is located is (ex, ey).

In the first modification, the following steps are executed instead of step S14 in FIG. 3 and 13, the first calculating unit 92 calculates the photometric amount RGB for each of the plurality of measurement areas 20-a to 20-e.

In addition, in the first modification, the following steps are executed instead of steps S16 to S22 in FIG. 10. 4 and 13, the selection controller 91 sets the angle of the micromirror 61 positioned at the coordinates ax and ay as the selection angle. The optical sensor part 8 outputs the signal SG2 which shows the photometric amount of the measurement area 20-a located in the coordinates ax and ay. The second calculating unit 93 calculates the three magnetic pole values XYZ of the measurement region 20-a located at the coordinates ax and ay. Next, the selection control unit 91 sets the angle of the micromirror 61 positioned at the coordinates (bx, by) as the selection angle. The optical sensor part 8 outputs the signal SG2 which shows the photometric amount of the measurement area 20-b located in coordinate (bx, by). The second calculating unit 93 calculates the three magnetic pole values XYZ of the measurement area 20-b located at the coordinates (bx, by). Hereinafter, the same process is performed also about coordinate (cx, cy), coordinate (dx, dy), and coordinate (ex, ey).

In the first modification, the following steps are executed instead of step S31 to step S36 in FIG. 3 and 13, the third calculating unit 94 uses correction equations 5 to 7, using correction matrix coefficients A (ax, ay), correction matrix coefficients A (bx, by), and correction matrix coefficients A. FIG. (cx, cy), the correction matrix coefficient A (dx, dy), and the correction matrix coefficient A (ex, ey) are calculated.

For example, in the case of the correction matrix coefficient A (ax, ay), the third calculation unit 94 calculates the value obtained in step S1 of FIG. 9, the value obtained in step S2 of FIG. 9, and the step of FIG. 9. A (ax, ay) is calculated using the value obtained in S3.

The values obtained in step S1 of FIG. 9 are Xr (ax, ay), Yr (ax, ay), Zr (ax, ay), Rr (ax, ay), Gr (ax, ay) and Br (ax, ay). )to be.

The values obtained in step S2 of FIG. 9 are Xg (ax, ay), Yg (ax, ay), Zg (ax, ay), Rg (ax, ay), Gg (ax, ay) and Bg (ax, ay). )to be.

The values obtained in step S3 of FIG. 9 are Xb (ax, ay), Yb (ax, ay), Zb (ax, ay), Rb (ax, ay), Gb (ax, ay) and Bb (ax, ay). )to be.

The third calculation unit 94 stores the correction matrix coefficient A (ax, ay) in the storage unit 95 in correspondence with the measurement area 20-a, and corrects the correction matrix coefficient in correspondence with the measurement area 20-b. A (bx, by) is stored in the storage unit 95, and the correction matrix coefficient A (cx, cy) is stored in the storage unit 95 in correspondence with the measurement area 20-c. The correction matrix coefficient A (dx, dy) is stored in the storage unit 95 in correspondence with d), and the correction matrix coefficient A (ex, ey) is stored in the storage unit 95 in correspondence with the measurement area 20-e. Remember

The correction coefficient acquisition mode of the first modification is summarized as follows. In the correction coefficient acquisition mode, the first calculation unit 92 uses a color image information signal SG1 of the screen SC outputted from the imaging unit 5, and has a plurality of positions having the positions designated by the input unit 10. The photometric amounts RGB of each of the measurement areas 20-a to 20-e are calculated, and the selection control unit 91 uses the input unit 10 to determine the plurality of measurement areas 20-a to 20-e. ) And the second calculation unit 93 in turn sequentially selects light from the optical sensor unit 8 to indicate the photometric amounts of the measurement areas 20-a to 20-e. Using SG2, the three magnetic pole values XYZ of each of the plurality of measurement regions 20-a to 20-e at the designated position are calculated using the input unit 10, and the third calculating unit 94 is the input unit 10. Calculate a plurality of correction matrix coefficients A (ax, ay) to A (ex, ey) corresponding to each of the plurality of measurement regions 20-a to 20-e at the positions specified in The suppression unit 95 includes a plurality of correction matrix coefficients A (ax, ay) to A (ex, ey) calculated by the third calculation unit 94 at a position designated by the input unit 10. Are stored in association with the measurement areas 20-a to 20-e.

The colorimetric mode of the first modification is described. In the first modification, steps S43 to S45 in FIG. 12 are performed for the plurality of measurement regions 20-a to 20-e. That is, in the colorimetric mode, the first calculating unit 92 uses the color image information signal SG1 of the screen SC outputted from the imaging unit 5, to determine the plurality of positions at the position designated by the input unit 10. The photometric amounts RGB of each of the measurement areas 20-a to 20-e are calculated, and the correction unit 96 performs a plurality of measurement areas 20-a to 20-e at positions specified by the input unit 10. For each of the above), the above correction process is performed. The luminance chromaticity calculator 97 calculates luminance and chromaticity for each of the plurality of measurement regions 20-a to 20-e using the result of the correction process.

Referring to FIG. 13, in the first modification, a part of the screen SC designated by the operator is not the entire surface of the screen SC, but the plurality of measurement areas 20. For this reason, the time for acquiring the correction coefficient and the time for color measurement can be shortened. This is demonstrated as a comparative example and the two-dimensional colorimetry apparatus 1 (for example, patent document 3) provided with a scanning optical system instead of DMD6.

In the case of the scanning optical system, since part of the screen SC cannot be scanned, the entire screen SC is scanned. When the resolution of the scanning optical system is 1024x768, for example, the number of measurement areas 20 is 1024x768. In contrast, in the first modification, the number of the measurement regions 20 can be, for example, five. Therefore, in the first modification, the processing speed of the correction coefficient acquisition mode and the colorimetric mode is about 157000 times as compared with the comparative example.

157000 ≒ (1024 × 768) ÷ 5

The exposure time required for one measurement region 20 is, for example, 1/60 second. The exposure time of each of the correction coefficient acquisition mode and the colorimetric mode is about 80 msec in the first modification, and about 218 minutes in the comparative example. Therefore, according to the first modification, it is possible to significantly shorten the exposure time.

5 × 1 / 60sec ≒ 80msec

1024 × 768 × 1 / 60sec ≒ 218 minutes

A second modification of the present embodiment will be described. 14 is a block diagram showing the configuration of a two-dimensional colorimetric device 1a according to a second modification. The two-dimensional colorimetric apparatus 1 shown in FIG. 3 includes a mirror portion 3 and a switching portion 4 (first type of optical system), whereas the two-dimensional colorimetric apparatus 1a includes a light splitter 3a ( 2nd aspect of an optical system) is provided. The light splitter 3a splits the light L of the screens SC into two, guides one of the two divided lights L1 to the first optical path 21, and the other divided light L2. ) Is guided to the second optical path 22. The light splitter is, for example, a half mirror. In the second modification, the optical splitter 3a eliminates the need to switch the mirror 3 to the first and second positions as shown in FIGS. 3 and 4.

In the present embodiment, the first modified example, and the second modified example, a multiband type, a spectroscopic type, and a filter rotary type may be used instead of the optical sensor unit 8 shown in FIG. 7. 15 is a schematic diagram of an optical sensor unit 800 of the multi-band type.

The optical sensor unit 800 includes a first photodiode 801a, a second photodiode 801b, a third photodiode 801c, a fourth photodiode 801d, a fifth photodiode 801e, and a sixth photo. A diode 801f, and a first filter 802a, a second filter 802b, a third filter 802c, a fourth filter 802d, a fifth filter 802e, and a sixth filter 802f. .

The first photodiode 801a receives the light La passing through the first filter 802a. The second photodiode 801b receives the light La passing through the second filter 802b. The third photodiode 801c receives the light La passing through the third filter 802c. The fourth photodiode 801d receives the light La passing through the fourth filter 802d. The fifth photodiode 801e receives the light La passing through the fifth filter 802e. The sixth photodiode 801f receives the light La passing through the sixth filter 802f.

The first filter 802a to the sixth filter 802f have spectral sensitivity in different wavelength bands. FIG. 16: is explanatory drawing explaining the spectral sensitivity of the 1st filter 802a-the 6th filter 802f. In FIG. 16, the horizontal axis represents wavelength and the vertical axis represents spectral sensitivity. 15 and 16, the first filter 802a has a spectral sensitivity A1 (thick solid line), the second filter 802b has a spectral sensitivity A2 (dashed line of long dot), and the third filter 802c. ) Has a spectral sensitivity A3 (dotted dashed line), the fourth filter 802d has a spectral sensitivity A4 (double dashed line), the fifth filter 802e has a spectral sensitivity A5 (dashed dashed line), and the sixth Filter 802f has spectral sensitivity A6 (thin solid line).

Referring to FIG. 15, when the first photodiode 801a receives the light La passing through the first filter 802a, the first photodiode 801a outputs a light receiving signal in the case of spectral sensitivity A1. do.

When the second photodiode 801b receives the light La passing through the second filter 802b, the second photodiode 801b outputs a light receiving signal in the case of spectral sensitivity A2.

When the third photodiode 801c receives the light La passing through the third filter 802c, the third photodiode 801c outputs a light receiving signal in the case of spectral sensitivity A3.

When the fourth photodiode 801d receives the light La passing through the fourth filter 802d, the fourth photodiode 801d outputs a light receiving signal in the case of spectral sensitivity A4.

When the fifth photodiode 801e receives the light La passing through the fifth filter 802e, the fifth photodiode 801e outputs a light receiving signal in the case of spectral sensitivity A5.

When the sixth photodiode 801f receives the light La passing through the sixth filter 802f, the sixth photodiode 801f outputs a light receiving signal in the case of spectral sensitivity A6.

These light reception signals are sent to the control processing part 9 as signal SG2 which shows the photometric amount of one measurement area 20, as shown in FIG.

As described above, the multi-band type optical sensor unit 800 includes four or more filters having different spectral sensitivities, and receives each of the plurality of measurement regions 20 through each of four or more filters. Output a light receiving signal.

17 is a schematic view of the optical sensor unit 810 of the spectroscopic type. The optical sensor unit 810 is, for example, an imaging optical system 811, a reflective diffraction grating 812, a line sensor 814, an imaging optical system 811, a reflective diffraction grating 812, and a line sensor. A housing 813 for receiving 814.

The housing 813 is a box formed of a material having light shielding properties with respect to the wavelength range where the line sensor 814 can receive light. An incidence opening (for example, a slit) 815 is formed on one side surface of the housing 813 to guide light La into the housing 813.

The light La incident from the incident opening 815 is incident on the imaging optical system 811, parallelized by the imaging optical system 811, collimated, and then incident on the reflective diffraction grating 812. The grating 812 is diffracted and reflected. This reflected light is again incident on the imaging optical system 811, and is imaged on the light receiving surface 816 of the line sensor 814 by the imaging optical system 811 as a wavelength-dispersed image of an optical image.

The line sensor 814 is configured with a plurality of photoelectric conversion elements arranged along one direction. The photoelectric conversion element is, for example, a silicon photodiode (SPD) or the like. The line sensor 814 photoelectrically converts the wavelength-dispersed phase of the optical image formed on the light receiving surface 816 by each of the plurality of photoelectric conversion elements, thereby generating an electrical signal indicating the intensity level of each wavelength. And the line sensor 814 outputs this electric signal (signal SG2) to the control processing part 9 (FIG. 4).

As described above, the optical sensor unit 810 of the spectroscopic type spectroscopically receives and receives the light from the measurement region 20 with respect to each of the plurality of measurement regions 20, and outputs a light reception signal of each spectrum. .

18 is a schematic view of the optical sensor unit 820 of the filter rotation type. The optical sensor unit 820 includes a filter unit 81 and a photodiode 82 for receiving light La transmitted through the filter unit 81.

The filter portion 81 includes an X filter 83, a Y filter 84 and a Z filter 85, and a disk-shaped holder 86 for holding these filters. The spectral sensitivity obtained by combining the spectral sensitivity of the X filter 83 and the spectral sensitivity of the photodiode 82 becomes the spectral sensitivity that matches the orange color function x (λ). The spectral sensitivity obtained by combining the spectral sensitivity of the Y filter 84 and the spectral sensitivity of the photodiode 82 becomes the spectral sensitivity that matches the orange color function y (λ). The spectral sensitivity obtained by combining the spectral sensitivity of the Z filter 85 with the spectral sensitivity of the photodiode 82 becomes the spectral sensitivity that matches the orange color function z (λ).

The holder 86 is rotated by a rotation mechanism (not shown), and the positions of the X filter 83, the Y filter 84, and the Z filter 85 are positioned at positions opposite to the light receiving surface of the photodiode 82, You can switch in turn. When the photodiode 82 receives light La in a state where the light receiving surface of the photodiode 82 and the X filter 83 face each other, the photodiode 82 outputs a light receiving signal indicating X. . When the photodiode 82 receives light La in a state where the light receiving surface of the photodiode 82 and the Y filter 84 face each other, the photodiode 82 outputs a light receiving signal indicating Y. . When the photodiode 82 receives light La in a state where the light receiving surface of the photodiode 82 and the Z filter 85 face each other, the photodiode 82 outputs a light receiving signal indicating Z. . These light reception signals are sent to the control processing part 9 as signal SG2 which shows the photometric amount of one measurement area 20, as shown in FIG.

7, 15 and 18, instead of the photodiodes 80a to 80c, 801a to 801f, 82, a two-dimensional sensor, a one-dimensional sensor, a photomultiplier tube, or the like may be used as the light receiving element of the light La. .

In the present embodiment, the correction coefficients are calculated for each of the plurality of measurement regions 20, but the third modification calculates the correction coefficients by focusing on one of the plurality of measurement regions 20. The third modification will be described. Referring to FIG. 4, the DMD 6 (light selection unit) includes a measurement area 20 (herein, the measurement area 20-c shown in FIG. 13) among the plurality of measurement areas 20. Select light from. The optical sensor unit 8 receives light from the measurement area 20-c selected by the DMD 6 and outputs a signal SG2 indicating the metering amount. The second calculation unit 93 calculates three stimulus values of the measurement area 20-c using the signal SG2 indicating the photometric amount of the measurement area 20-c output from the optical sensor unit 8.

Referring to FIG. 3, the first calculating unit 92 uses the color image information signal of the screen SC (two-dimensional region) output from the imaging unit 5 to generate three stimulus values of the measurement region 20-c. Calculate The third calculation unit 94 includes three stimulus values of the measurement area 20-c calculated by the first calculation unit 92 and three of the measurement areas 20-c calculated by the second calculation unit 93. Using the stimulus value, a correction factor corresponding to the measurement area 20-c is calculated. The control processing unit 9 stores the correction coefficient calculated by the third calculating unit 94 in the storage unit 95 in association with the measurement area 20-c. The above is the correction coefficient acquisition mode of the third modification.

In the colorimetric mode, the first calculation unit 92 calculates three magnetic pole values of the measurement area 20-c using the color image information signal of the screen SC output from the imaging unit 5. The correction unit 96 corrects these three stimulus values with correction coefficients corresponding to the measurement area 20-c read out from the storage unit 95.

In addition, the operator can designate the measurement area 20-c (any measurement area). The operator inputs the position of the measurement area (that is, the measurement area 20-c) which should be selected by the DMD 6 among the plurality of measurement areas 20 using the input unit 10. The DMD 6 selects the measurement area 20-c based on the position input to the input unit 10.

(Arrangement of embodiment)

The two-dimensional colorimetric apparatus according to the present embodiment is a two-dimensional colorimetric apparatus that colorizes a plurality of measurement regions included in the two-dimensional region, and is an optical system for forming a first optical path and a second optical path as an optical path of light from the two-dimensional area, and An image pickup unit including an image pickup element, disposed in the first optical path, for picking up a color image of the two-dimensional area, and disposed in the second optical path, and from light from the two-dimensional area, from one of the measurement areas; A light selection unit for selecting light, a selection control unit for selecting light from a plurality of the measurement areas, and a function for receiving light from an area having an area less than or equal to the measurement area; A signal that receives light from the plurality of measurement areas selected by the light selection unit and indicates a metering amount of each of the plurality of measurement areas. An optical sensor unit for outputting a light source, a first calculating unit for calculating three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit, and outputting from the optical sensor unit A second calculation unit for calculating three stimulus values of each of the plurality of measurement areas using a signal indicating the photometric amount of the plurality of measurement areas, and the first calculation unit for one measurement area Using the three stimulus values and the three stimulus values calculated by the second calculating section, a process of calculating a correction coefficient of one measurement region is a correction coefficient calculation process, and for each of the plurality of measurement regions, And a third calculating section for performing the correction coefficient calculating process.

According to the two-dimensional colorimetric apparatus according to the present embodiment, a plurality of correction coefficients corresponding to each of the plurality of measurement regions included in the two-dimensional region can be obtained. Therefore, even when there is a nonuniformity in the chromaticity and luminance of the light from the two-dimensional region, three stimulus values can be accurately corrected for each of the plurality of measurement regions.

In the above configuration, a mode setting unit for selectively setting a correction coefficient acquisition mode for acquiring a plurality of the correction coefficients in advance, a colorimetric mode for colorizing the plurality of measurement areas using the plurality of correction coefficients, and a storage unit Further comprising, in the correction coefficient acquisition mode, the first calculation unit calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit, The second calculating unit calculates three stimulus values of each of the plurality of measuring regions by using a signal indicating a photometric amount of the plurality of measuring regions output from the optical sensor unit, and the third calculating unit includes a plurality of The correction coefficient calculation processing is performed for each of the measurement areas, and the storage unit includes a plurality of the correction systems calculated by the third calculation unit. Each of the stores in correspondence with the plurality of the measurement area.

This configuration calculates a plurality of correction coefficients corresponding to each of the plurality of measurement regions in the correction coefficient acquisition mode, and stores each of the calculated plurality of correction coefficients in association with the plurality of measurement regions. Thus, a plurality of correction coefficients can be obtained in advance.

In the above configuration, the first calculating unit calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit in the colorimetric mode, The two-dimensional colorimetric apparatus uses the correction coefficients stored in the storage unit in association with one of the measurement regions with three magnetic pole values calculated by the first calculating unit in the colorimetric mode for one of the measurement regions. The correction process is performed as a correction process, and further includes a correction unit that performs the correction process for each of the plurality of measurement regions in the colorimetric mode.

This configuration uses a plurality of correction coefficients obtained in advance to calculate three stimulus values of each of the plurality of measurement regions (these three stimulus values are calculated using a color image information signal of a two-dimensional region output from the imaging unit). The correction is prescribed.

In the above configuration, a mode setting unit for selectively setting a correction coefficient acquisition mode for acquiring a plurality of the correction coefficients in advance, a colorimetric mode for colorizing the plurality of measurement areas using the plurality of correction coefficients, and a storage unit And in the correction coefficient acquisition mode, an input unit for inputting an operator designating a position on the two-dimensional area of each of the plurality of measurement areas whose total area is smaller than that of the two-dimensional area, by the operator of the two-dimensional colorimetric apparatus. In the correction coefficient acquisition mode, the first calculating section uses a color image information signal of the two-dimensional region output from the image capturing section to display each of the plurality of measurement regions at a position designated by the input section. Calculates three stimulus values, and the selection control unit uses a plurality of positions at a designated position using the input unit Selects the light from the measurement region of the light selection unit, and the second calculating unit uses the input unit using a signal indicating the photometric amount of the plurality of measurement regions output from the optical sensor unit. Computes three stimulus values of each of the plurality of measurement regions at a designated position, and the third calculating unit performs the correction coefficient calculation processing on each of the plurality of the measurement regions at a designated position using the input unit. The storage unit stores each of the plurality of correction coefficients calculated by the third calculation unit in association with the plurality of measurement regions at positions designated by the input unit.

This configuration makes a part of the two-dimensional area designated by the operator not a whole surface of the two-dimensional area as a plurality of measurement areas. For this reason, the time for acquiring the correction coefficient can be shortened.

In the above configuration, the first calculating section uses the color image information signal of the two-dimensional region output from the image capturing section in the colorimetric mode, and each of the plurality of measurement regions at a position designated by the input section. The three stimulus values are calculated, and the two-dimensional colorimetric device associates the three stimulus values calculated by the first calculation unit in the colorimetric mode with respect to one of the measurement areas, in relation to one of the measurement areas. Correction processing is performed by using the correction coefficients stored in the correction processing, and in the colorimetric mode, the correction processing is performed on each of the plurality of measurement areas at a position designated by the input unit. It further comprises a wealth.

This configuration makes a part of the two-dimensional area designated by the operator not a whole surface of the two-dimensional area as a plurality of measurement areas. For this reason, the time required for color measurement can be shortened.

In the above configuration, the optical system has a first form and a second form. A first aspect of the optical system is a mirror portion and a position at which the mirror portion can reflect light from the two-dimensional region, and includes a guide that guides the light from the two-dimensional region to one of the first optical path and the second optical path. The mirror portion at a first position and a position at which light from the two-dimensional region cannot reflect the mirror portion, and at a second position for guiding light from the two-dimensional region to the other side of the first optical path and the second optical path. And a switching unit for switching positions.

A second aspect of the optical system divides the light from the two-dimensional region into two, guides the one light divided by the two into the first optical path, and guides the other light divided into the second optical path. It includes a light splitter.

In the first aspect of the optical system, the mirror portion is switched to the first position and the second position. In the second aspect of the optical system, the light splitting portion is provided so that these switching is unnecessary.

In the above configuration, the light selector has a first form and a second form. The first form of the light selector comprises a DMD. The second form of the light selector comprises a liquid crystal spatial light modulator.

In the above configuration, the optical sensor unit has a first to third form. The first aspect of the optical sensor section has a spectral sensitivity that matches the orange color function x (λ), y (λ), z (λ) of the CIE specification, and for each of the plurality of measurement regions, three stimulus values of the XYZ colorimeter A light receiving signal representing X of XYZ, a light receiving signal representing Y, and a light receiving signal representing Z are output. The second aspect of the optical sensor unit includes four or more filters having different spectral sensitivities, and outputs a received signal received through each of the four or more filters for each of the plurality of measurement regions. The third aspect of the optical sensor unit spectroscopically receives and receives light from the measurement region with respect to each of the plurality of measurement regions, and outputs a light reception signal of each spectrum.

In the above configuration, the selection control unit selects the light from the plurality of measurement areas in the light selection unit in a predetermined order.

This application is based on the JP Patent application 2016-058473 of an application on March 23, 2016, The content is contained in this application.

In order to express the present invention, the present invention has been described appropriately and sufficiently through the embodiments with reference to the drawings, but those skilled in the art should recognize that it is easy to change and / or improve the above-described embodiments. do. Therefore, unless the form of a change or improvement which a person skilled in the art implements is a level beyond the scope of a claim as described in a claim, it is interpreted that the said change or improvement is encompassed by the scope of a claim.

According to the present invention, a two-dimensional colorimetric apparatus can be provided.

Claims (16)

It is a two-dimensional colorimetric apparatus which measures a plurality of measurement regions included in the two-dimensional region,
As an optical path of light from the two-dimensional region, an optical system for forming a first optical path and a second optical path,
An imaging unit including a two-dimensional imaging element, disposed in the first optical path, and photographing a color image of the two-dimensional region;
A light selection unit disposed in the second optical path and configured to select light from one of the measurement areas among the light from the two-dimensional area;
A selection control unit for selecting light from a plurality of the measurement areas to the light selection unit;
A signal having a function of receiving light from an area having an area less than or equal to the measurement area, receiving light from the plurality of measurement areas selected by the light selection unit, and indicating a metering amount of each of the plurality of measurement areas And an optical sensor unit for outputting,
A first calculating unit which calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit;
A second calculating part which calculates three stimulus values of each of the plurality of measuring areas, by using a signal indicating photometric amounts of the plurality of measuring areas output from the optical sensor part;
Correcting the process of calculating the correction coefficient of one said measurement area | region using the three stimulus values computed by the said 1st calculating part and the three stimulus values calculated by the said 2nd calculating part about one said measurement area | region A two-dimensional colorimetric device comprising a third calculation unit that performs coefficient calculation processing and performs the correction coefficient calculation processing for each of the plurality of measurement areas. The method according to claim 1, further comprising: a mode setting unit for selectively setting a correction coefficient acquisition mode for acquiring a plurality of said correction coefficients in advance, a colorimetric mode for colorizing the plurality of measurement areas using the plurality of correction coefficients;
Further comprising a storage unit,
In the correction coefficient acquisition mode, the first calculating unit calculates three stimulus values of each of the plurality of measurement regions using the color image information signal of the two-dimensional region output from the imaging unit, and the second calculating unit Calculates three stimulus values of each of the plurality of measurement regions by using a signal indicating a photometric amount of the plurality of measurement regions output from the optical sensor unit, and the third calculating unit is configured to generate the plurality of measurement regions. The correction coefficient calculation process is performed for each, and the storage unit stores each of the plurality of correction coefficients calculated by the third calculation unit in association with the plurality of measurement regions. The said 1st calculating part calculates three stimulus values of each of the said measurement area | region using the color image information signal of the said two-dimensional area | region output from the said imaging part,
The two-dimensional colorimetric apparatus stores three correction values stored in the storage unit in correspondence with one measurement region, and three stimulus values calculated by the first calculation unit in the colorimetric mode for one measurement area. The process of correct | amending using is made into the correction process, and is further provided with the correction part which performs the said correction process with respect to each of the said some measurement area in the said colorimetric mode. The method according to claim 1, further comprising: a mode setting unit for selectively setting a correction coefficient acquisition mode for acquiring a plurality of said correction coefficients in advance, a colorimetric mode for colorizing the plurality of measurement areas using the plurality of correction coefficients;
Memory,
In the correction coefficient acquisition mode, further comprising: an input unit for inputting a position on the two-dimensional area of each of the plurality of measurement areas whose total area is smaller than the area of the two-dimensional area to be designated by an operator of the two-dimensional colorimetric apparatus,
In the correction coefficient acquisition mode, the first calculation unit uses three color image information signals of the two-dimensional region output from the imaging unit, and three magnetic poles of each of the plurality of measurement regions at a position designated by the input unit. Calculates a value, and the selection control unit selects light from the plurality of measurement areas at a position designated by the input unit, to the light selection unit, and the second calculation unit is output from the optical sensor unit. Using the signals indicating the metering amounts of the plurality of measurement areas, the three magnetic pole values of each of the plurality of measurement areas at the designated position are calculated using the input unit, and the third calculating unit is designated using the input unit. The correction coefficient calculation processing is performed on each of the plurality of measurement areas at the position, and the storage unit is the third Each of the plurality of the correction coefficient calculated by the acid, a two-dimensional colorimetric device for storage in association with the plurality of the measurement region in the specified location by using the input unit. 5. The plurality of measurement areas according to claim 4, wherein in the colorimetric mode, the first calculating part uses a color image information signal of the two-dimensional area output from the image capturing part and is located at a designated position using the input part. Compute each of the three stimulus values,
The two-dimensional colorimetric apparatus stores three correction values stored in the storage unit in correspondence with one measurement region, and three stimulus values calculated by the first calculation unit in the colorimetric mode for one measurement area. And a correction unit configured to perform the correction processing for each of the plurality of measurement areas at a position designated by the input unit in the colorimetric mode as a correction process. The method according to any one of claims 1 to 5,
The optical system,
Mirror section,
A position at which the mirror unit can reflect light from the two-dimensional region, a first position for guiding light from the two-dimensional region to one of the first optical path and the second optical path, and light from the two-dimensional region. A two-dimensional colorimetric apparatus including a switching section for switching the position of the mirror section to a second position that cannot reflect the mirror section and directing light from the two-dimensional region to the other side of the first optical path and the second optical path . The optical system according to any one of claims 1 to 5, wherein the optical system splits the light from the two-dimensional region into two, guides the one light divided into the first optical path, and the other divided into two. A two-dimensional colorimetric device comprising a light splitter for guiding light of the light path to the second optical path. 6. The two-dimensional colorimetric apparatus according to any one of claims 1 to 5, wherein the light selector comprises a DMD. 6. The two-dimensional colorimetric apparatus according to any one of claims 1 to 5, wherein the light selector comprises a liquid crystal spatial light modulator. The said optical sensor part has the spectral sensitivity corresponding to the orange color function x ((lambda)), y ((lambda)), z ((lambda)) of CIE prescription | regulation, and the said some measurement is carried out. The two-dimensional colorimetric apparatus which outputs the light reception signal which shows the X of 3 stimulus values XYZ, the light reception signal which shows Y, and the light reception signal which shows Z about each area | region. 6. The optical sensor unit according to any one of claims 1 to 5, wherein the optical sensor unit includes four or more filters having different spectral sensitivities, and receives light through each of the four or more filters for each of the plurality of measurement regions. Two-dimensional color measuring device that outputs a light receiving signal. The two-dimensional optical sensor according to any one of claims 1 to 5, wherein the optical sensor unit spectrally receives and receives the light from the measurement region with respect to each of the plurality of measurement regions, and outputs a light reception signal of each spectrum. Colorimetric device. The two-dimensional colorimetric apparatus according to any one of claims 1 to 5, wherein the selection control unit selects light from a plurality of the measurement areas in the light selection unit in a predetermined order. It is a two-dimensional colorimetric apparatus which measures a plurality of measurement regions included in the two-dimensional region,
An imaging unit which picks up a color image of the two-dimensional region;
A light selector for selecting light from a measurement area among the plurality of measurement areas;
An optical sensor unit which receives light from the measurement region selected by the light selection unit and outputs a signal indicating a photometric amount;
A first calculating unit which calculates three stimulus values of the measuring area by using the color image information signal of the two-dimensional area output from the imaging unit;
A second calculating part for calculating three stimulus values of said measuring area by using a signal indicating the photometric amount of said measuring area output from said optical sensor part;
And a third calculation unit configured to calculate a correction coefficient corresponding to the measurement area by using the three magnetic pole values calculated by the first calculating unit and the three magnetic pole values calculated by the second calculating unit. The storage unit according to claim 14, further comprising: a storage unit for storing the correction coefficients calculated in the third calculation unit in association with the measurement area;
And a correction unit for correcting the three magnetic pole values of the measurement area calculated by the first calculation unit with correction coefficients corresponding to the measurement areas read from the storage unit. The apparatus of claim 14 or 15, further comprising: an input unit for inputting a position of the measurement area to be selected by the light selection unit among the plurality of measurement areas, by an operator,
And the light selection unit selects the measurement area based on a position input to the input unit.

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