JP2015068813A - Evaluation method and evaluation device of metallic feeling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaluation method of metallic feeling which quantitatively evaluates metallic feeling of a measuring object.SOLUTION: An evaluation method of metallic feeling includes steps of: acquiring color information of a substance having metallic feeling; acquiring gloss information of the substance; acquiring texture information of the substance; acquiring luminosity information of a material which forms the substance; and evaluating the metallic feeling of the substance based on the color information, the gloss information, the texture information, and the luminosity information.

Description

  The present invention relates to a metallic feeling evaluation method and an evaluation apparatus for carrying out the evaluation method.

  In order to evaluate the color developability of the metallic recording image, it is necessary to objectively express the metallic feeling of the image. However, a technique for quantitatively evaluating a metallic feeling such as gold foil has not been established yet. Generally, it was performed by a method that provides the metallic feeling requested by the user using subjective evaluation, so how to quantitatively control the metallic feeling that has a unique texture such as gold foil, etc. I couldn't figure out whether I could satisfy. For this reason, information related to metallic feeling obtained in the past is repeatedly recorded, and enormous labor and cost are required.

Several proposals have been made to solve the above problems. For example, Patent Document 1 discloses a design evaluation method and a coated article in metallic paint color. In addition, the evaluation method of patent document 1 has the following processes (ia) thru | or (iii).
(Ia) Process for classifying metallic feeling into color and micro texture (iii) Process for quantitatively evaluating color by measuring the saturation and brightness on the highlight side and shade side using a multi-angle measuring device (iii) Process for quantitative evaluation of micro-texture by performing image analysis on highlight side and shade side using micro brightness measurement device

On the other hand, Patent Document 2 discloses a metallic coating numerical method and apparatus. The numerical method disclosed in Patent Document 2 includes the following processes (ib) to (iib).
(Ib) Process for capturing an enlarged image of a painted surface having a metallic feeling using a microscope (iib) Process for extracting feature values of glitter feeling from the enlarged image of (ib)

JP 2004-271467 A JP 2008-246347 A

  In the method of Patent Document 1, the labor for developing a metallic paint color can be reduced by limiting the measurement angles such as highlight side, shade side, and front side. However, there is a problem that the object to be measured is limited to those having a low metallic gloss. In the method of Patent Document 2, the metallic feeling of flakes such as metal is quantified and evaluated based on the distribution and brightness of the flakes. However, the color and macro metallic luster have not been measured or evaluated, and as a result, the metallic feeling having a color such as gold foil has not been quantitatively evaluated.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a metallic feeling evaluation method for quantitatively evaluating the metallic feeling of a measurement object.

The method for evaluating a metallic feeling of the present invention includes a step of obtaining color information of a substance having a metallic feeling,
Obtaining gloss information of the substance;
Obtaining texture information of the substance;
Obtaining the glitter information of the material constituting the substance;
And a step of evaluating a metallic feeling of the substance based on the color information, the gloss information, the texture information, and the glitter information.

  According to the present invention, it is possible to provide a metallic feeling evaluation method for quantitatively evaluating the metallic feeling of a measurement object.

It is sectional drawing which shows the outline | summary of a color information acquisition process. It is sectional drawing which shows the outline | summary of a gloss information acquisition process. It is a figure which shows the flowchart which shows the flow of the evaluation process of a metallic feeling. It is a figure which shows the example of the hardware constitutions of the evaluation apparatus of this invention.

The metallic feeling evaluation method of the present invention includes the steps shown in the following (A) to (E). (A) Step of acquiring color information of a substance having a metallic feeling (color information acquisition step)
(B) A process of acquiring gloss information of the substance (gloss information acquisition process)
(C) Step of acquiring texture information of the substance (material information acquisition step)
(D) The process of acquiring the glitter information of the material constituting the substance (the glitter information acquiring process)
(E) A step (evaluation step) of evaluating the metallic feeling of a substance based on color information, gloss information, texture information, and glitter information.

  Of the steps (A) to (E), the order of steps (A) to (D) is not particularly limited. Moreover, you may carry out simultaneously. Details thereof will be described later.

  Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described below, and appropriate modifications, improvements, and the like can be made from the embodiments described below based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. Those added are naturally included in the scope of the present invention.

  The evaluation method (metallic feeling evaluation method) of the present invention is a method for evaluating the metallic feeling of the recording medium to be evaluated. Here, examples of the recording medium to be evaluated include components that give rise to a metallic feeling contained in paints and dyes. In addition, as a component that brings about a metallic feeling, a metal formed by a metal itself, a mixture of metal flakes and a coloring material such as a pigment or a dye, or a film made of an organic material or an inorganic material is laminated. The thing etc. which have a feeling are mentioned.

  Hereinafter, each process (color information acquisition process, gloss information acquisition process, texture information acquisition process, glitter information acquisition process, evaluation process) will be described in detail.

[Color information acquisition process]
The color information that can be acquired in this step is a color that a person feels. Here, as a method for obtaining color information, for example, there is a method using an integrating sphere colorimeter. In this method, information obtained by colorimetry by a method of receiving diffused light including a specular reflection component, specifically, the above-mentioned CIE (International Standard Color System) a * and b * Information on the color of diffused light can be obtained.

  FIG. 1 is a sectional view showing an outline of the color information acquisition process. FIG. 1 shows a light source 11 for irradiating predetermined illumination light 11 a, an evaluation recording medium 12 irradiated with the illumination light 11 a, and when the illumination light 11 a is incident on the evaluation recording medium 12. And an integrating sphere type light receiving unit 13 for receiving the reflected light generated in FIG.

  The light source 11 that emits the illumination light 11a can be appropriately selected according to the external environment in which the recording medium 12 to be evaluated is desired to be evaluated.

  For example, when performing evaluation in an incandescent lamp environment, a standard A light source can be selected. Moreover, when evaluating in sunlight environment, a standard B light source can be selected. Furthermore, the standard C light source can be selected when performing an evaluation under an external environment received by the north window on a sunny day. Furthermore, a standard D light source can be selected when performing evaluation in an average daylight including ultraviolet rays.

  The integrating sphere type light receiving unit 13 receives the reflected light 11b generated when the illumination light 11a is incident on the evaluation recording medium 12 (the surface thereof). Information on the color of the reflected light 11b received by the integrating sphere light receiving unit 13 is acquired as color information using a * and b * of the CIE based on the spectral spectrum information of the visible light region of the illumination light 11a acquired in advance. can do. In this embodiment, the color information of the reflected light is acquired using the CIE a * and b *. However, the color information of the reflected light 11b is acquired using the CIE x and y as necessary. May be. Further, as an evaluation standard for acquiring the color information, a standard white plate such as barium sulfate is used, and after the color information of the reference value is acquired in advance before the evaluation recording medium 12 is evaluated, the evaluation recording medium 12 Measurement may be performed.

[Gloss information acquisition process]
The gloss information that can be acquired in this step is that the distance between the medium and the light receiving part is 30 cm apart and the angle formed by the irradiation part, the medium, and the light receiving part is changed, and It is the brightness change measured by the light receiving unit when any of the positions is changed. FIG. 2 is a cross-sectional view showing an outline of the gloss information acquisition process. FIG. 2 shows a light source 11 for irradiating predetermined illumination light 11a, an evaluation recording medium 12 irradiated with the illumination light 11a, and the illumination light 11a incident on the evaluation recording medium 12. And a light receiving portion 14 for receiving the reflected light 11b generated in FIG. 2 is supported by the movable column 15 so that it can swing while maintaining a certain distance from the incident point (irradiation position 12a) of the illumination light 11a. 2 is also a member for fixing the light source 11 at a predetermined position.

  The light source 11 that emits the illumination light 11a can be appropriately selected according to the external environment in which the evaluated recording medium 12 is to be evaluated, as in the color information acquisition step described above.

  The light receiving unit 14 receives reflected light generated when the illumination light 11a is incident on the recording medium 12 to be evaluated. Since the light receiving region of the light receiving unit 14 has a surface with a predetermined width, there is an opening angle for receiving regular reflection light. In the present embodiment, the reflected light is measured after the opening angle is preferably set to be −0.4 ° or more and 0.4 ° or less. However, if the opening angle is wide, a component other than the regular reflection light component is measured. Diffuse light may also be received. For this reason, it is preferable that the opening angle is −0.4 ° or more and 0.4 ° or less, and that the opening angle is −0.1 ° or more and 0.1 ° or less allows regular reflection light to be received with high accuracy. It is more preferable.

  The light source 11 that irradiates the illumination light 11a sets, for example, an angle of irradiating light to the recording medium 12 to be evaluated from the vertical direction to 0 °, and sets the angle to, for example, 45 °. At this time, the irradiation angle of the light applied to the recording medium 12 to be evaluated is 45 °. Then, as shown in FIG. 2, after fixing the positions of the light source 11 and the recording medium 12 to be evaluated, the light receiving unit 14 is swung from 90 ° to −90 ° while keeping the distance from the irradiation position 12a constant. Then, the lightness L * at a predetermined angle is measured. The predetermined angle referred to here is a light receiving angle of reflected light received by the light receiving unit 14. Further, when measuring the lightness L *, the light receiving unit 14 is measured while being moved by 0.1 °.

  Since an object having a metallic feeling generally has a high glossiness, the movement range (swinging range) of the light receiving unit 14 does not necessarily have to be in a range from 90 ° to −90 °, and from 0 °. It may be in the range of -90 °. Further, when measuring an object having a metallic feeling, even if the light receiving angle changes slightly, a large change in brightness may occur. For this reason, when measuring the lightness L * stepwise, the measurement interval should be 1 ° or less, preferably 0.1 ° or less, and more preferably 0.01 ° or less. preferable.

  Information on the brightness received by the light receiving unit 14 is acquired as gloss information using LIE of CIE. As described above, in this embodiment, gloss information is acquired based on information on brightness using CIE L *. However, gloss information is acquired using luminous reflectance Y of CIE as necessary. May be. As an evaluation standard for acquiring gloss information, a standard value may be measured in advance before evaluating the recording medium 12 to be evaluated using a standard polishing plate such as black polishing glass.

In the case where the gloss information is quantified by the sharpness using the lightness L * with respect to the light receiving angle obtained by the measurement method described above, it is preferable to obtain the following general formula (1).
Sharpness = L / w (1)

In formula (1), L represents the value of the lightness L * highest lightness among the measured at each light receiving angle (L * _MAX), w is the L * _MAX half (L * _MAX / 2) represents the width of the light receiving angle at two points.

An object having a general metallic feeling has the maximum brightness (L * _MAX ) centered on the light reception angle of the regular reflection light with respect to the illumination light 11a, and the lightness L * gradually decreases as the distance from the light reception angle increases. For this reason, there are two light receiving angles indicating the half value of the lightness L * _MAX . In the present embodiment, gloss information is acquired using the angle difference w between the two light receiving angles and the sharpness in the general formula (1).

  In the present embodiment, the gloss information is acquired by fixing the positions of the illumination light 11a and the recording medium 12 to be evaluated and moving the light receiving unit 14 while keeping the distance from the irradiation position 12a constant. However, the gloss information may be acquired by fixing the positions of the light receiving unit 14 and the recording medium 12 to be evaluated and moving the light source 11 that emits the illumination light 11a while keeping the distance from the irradiation position 12a constant. Further, the light receiving unit 14 is moved while the distance from the irradiation position 12a is kept constant in a state where the position of the illumination light 11a is fixed and the evaluation recording medium 12 is tilted around the irradiation position 12a of the evaluation recording medium. The gloss information may be acquired by performing the operation. Further, while the position of the light receiving unit 14 is fixed and the evaluation recording medium 12 is tilted around the irradiation position 12a of the evaluation recording medium, the distance between the irradiation light 11a and the irradiation position 12a is made constant. Gloss information may be acquired by moving it. In the present embodiment, the gloss information is acquired after setting the distance between the illumination light 11 and the light receiving unit 14 and the irradiation position 12a to 30 cm in consideration of the distance that a person actually sees the recording medium. However, in the metallic feel evaluation method of the present invention, the gloss information may be acquired by changing the illumination light or the distance from the recording medium to be evaluated according to the field or scene in which the recording medium to be evaluated is used.

  In the present invention, this step includes the process of irradiating the target substance (evaluated recording medium 12) with the irradiation light, and the reflected light generated by irradiating the control substance with the irradiation light by the light receiving unit. A process for obtaining the information. At this time, by repeating the above two processes while continuously changing the position of the light source 11 that emits the irradiation light 11a using the movable support column 15 shown in FIG. Gloss information when the target substance (evaluated recording medium 12) is observed in a plurality of directions can be acquired.

[Material information acquisition process]
The texture information can be obtained by image analysis of the brightness distribution of the recording medium to be evaluated. An image for image analysis can be acquired by photographing the recording medium to be evaluated using an optical microscope that can be photographed by a CCD camera. By quantifying the brightness distribution of the obtained image with the granularity obtained by Fourier transform using the spatial frequency of density fluctuation and the visual spatial frequency, it is possible to acquire texture information. Here, the granularity can be obtained by the following general formula (2).
Granularity = ∫ {WS (u) ^0.5 × VTF (u)} du (2)

  In Expression (2), u represents a spatial frequency, WS (u) represents a spatial frequency characteristic of density variation, and VTF (u) represents a visual spatial frequency characteristic.

  Here, the spatial frequency u generally indicates a striped pattern or the like represented by a wave number per visual angle of 1 °. The granularity obtained using the spatial frequency characteristics (WS (u), VTF (u)) varies depending on the brightness of the illumination light and the distance between the recording medium to be evaluated. In the present embodiment, as described above, after taking an image using an optical microscope, by using the granularity when the brightness of illumination light is 1000 lux and the distance to the recording medium to be evaluated is 30 cm. Texture information can be acquired. However, the present invention is not limited to this method, and the texture information is acquired by using the granularity obtained by changing the distance from the illumination light or the recording medium to be evaluated according to the field or scene in which the recording medium to be evaluated is used. Can do.

[Process of acquiring material brightness information (process of acquiring brightness information)]
The brightness information of the material can be acquired by measuring the intensity of light reflection of the material itself. In order to evaluate the light reflection strength of the material itself, the illumination light is irradiated from the direction perpendicular to the recording medium to be evaluated, and the reflected light of the irradiation light received from the same direction is measured. Evaluation is based on the obtained regular reflectance. However, if the recording medium to be evaluated has a concavo-convex shape or a metallic color is formed by fine pieces such as aluminum flakes or brass, it is used in a general spectrophotometer or the gloss information acquisition process described above. The reflectance of the material itself cannot be measured with the conventional measurement method. This is because the regular reflectance of the material itself is affected by the uneven shape on the surface of the recording medium to be evaluated, and cannot be measured in a region where there are no metal fine pieces.

  For this reason, when measuring the regular reflectance, it is not affected by the uneven shape of the surface of the recording medium to be evaluated, and it is an area smaller than a minute piece (aluminum flake, brass, etc.) that creates a metallic space. It is preferable to measure. As a method for measuring the regular reflectance in this small region, for example, there is a method using a microspectrophotometer in which a lens or a pinhole is installed in the optical path portion of the illumination light. The information on the regular reflectance can be acquired from the CIE L * which is a parameter indicating the brightness of the material, but the CIE's luminous reflectance Y which is a parameter indicating the brightness information of the material is used as necessary. You may acquire using.

[Evaluation process]
FIG. 3 is a flowchart showing the flow of the metallic feeling evaluation process. The flowchart of FIG. 3 shows a flow in which color information, gloss information, texture information, and material brightness information are acquired by operating the operation unit, and the output unit extracts the acquired information as data. Thereby, the above-mentioned information can be obtained as four quantitative values.

  Further, in the flowchart of FIG. 3, calculation processing is performed in the sharpness calculation unit in order to acquire optical information, and calculation processing is sequentially performed in the image capturing unit, image extraction unit, and image analysis unit in order to acquire texture information. It has also been shown to do.

The order in which color information, gloss information, texture information, and material brightness information are acquired is not particularly limited, and may be acquired in any order, and this order can be appropriately changed depending on measurement efficiency and the like. A plurality of pieces of information may be simultaneous. As a metallic feeling evaluation method of the present embodiment, there are evaluation methods performed by the following processes (i) to (iii).
(I) A process of quantifying the object having a metallic feeling requested by the user by the evaluation process described in FIG. 3 (ii) An object having an equivalent metallic feeling provided by the parties is described in FIG. The process of quantifying by the evaluation process (iii) The process of comparing and evaluating the four pieces of quantitative information respectively obtained by (i) and (ii)

  If there is a difference in any of the numerical values related to the four quantified information obtained in the processes (i) and (ii), this difference is set so as to have the metallic feeling requested by the user. The recording medium is adjusted so as to be within a desired range. As a result, the metallic color can be adjusted much more efficiently than when the desired metallic color is adjusted by subjective evaluation and experience.

[Metallic feeling evaluation device]
The evaluation apparatus of the present invention is an evaluation apparatus for evaluating the metallic feeling of a substance. The evaluation apparatus of the present invention is an apparatus having the following configurations (a) to (e).
(A) means for obtaining color information of the substance (b) means for obtaining gloss information of the substance (c) means for obtaining texture information of the substance (d) means for obtaining the glitter information of the material constituting the substance (e ) Evaluation means for evaluating the metallic feel of a substance based on color information, gloss information, texture information and brightness information

  FIG. 4 is a diagram showing an example of the hardware configuration of the evaluation apparatus of the present invention. The evaluation apparatus 1 in FIG. 4 includes a main body 2 that performs measurement and a control unit 3. In the evaluation apparatus 1 shown in FIG. 4, the recording medium 12 to be evaluated is installed on the medium installation unit 19.

In the evaluation apparatus of the present invention, as means for acquiring the color information of a substance, for example, there is a configuration including the following (a-1) to (a-3) illustrated in FIG.
(A-1) A light source 11 that emits irradiation light 11a irradiated toward the recording medium 12 (measurement substance) to be evaluated.
(A-2) Integrating sphere type light receiving unit 13 for receiving the reflected light 11b emitted from the recording medium 12 to be evaluated
(A-3) PC terminal 18

  Here, (a-1) is set to an angle of 45 ° with respect to this reference, with an installation angle of the epi-illumination optical microscope 16 described later as a reference (0 °).

  (A-1) and (a-2) are means included in the means for acquiring color information, specifically, reflected light by receiving reflected light from the recording medium 12 (measurement substance). It becomes a means to acquire the information. More specifically, (a-1) is a means for irradiating the irradiation light 11a toward the recording medium 12 (measurement substance) to be evaluated. The reflected light from the recording medium 12 to be evaluated described here includes regular reflected light and diffused light. Further, (a-2) is a means for acquiring information relating to reflected light generated when the irradiation light 11a is incident on the recording medium 12 to be evaluated. In the evaluation apparatus 1 of FIG. 4, the irradiation light 11a reaches the integrating sphere light receiving unit 13 before entering the recording medium 12 to be evaluated. At this time, the integrating sphere light receiving unit 13 Information about 11a can be acquired.

  In the evaluation apparatus 1 of FIG. 4, the integrating sphere light receiving unit 13 is installed so as to cover the recording medium 12 to be evaluated. For this reason, it may be installed when acquiring color information, and may move to a position where no problem occurs when acquiring other information (gloss information, texture information, material glitter information) as necessary. preferable.

  On the other hand, (a-3) acquires color information based on the information on the reflected light and the information on the irradiated light acquired by the integrating sphere light receiving unit 13 in (a-2). By the way, although not shown in FIG. 4, the integrating sphere type light receiving unit 13 is connected to the signal processing circuit 20a, and the reflected light information acquired by the integrating sphere type light receiving unit 13 by the signal processing circuit 20a and The irradiation light information is converted into color information. The PC terminal 18 connected to the signal processing circuit 20a acquires this color information. The format of the color information acquired by (a-3) at this time is not particularly limited, but is preferably information represented by CIE a * and b *.

In the evaluation apparatus of the present invention, as means for acquiring the gloss information of a substance, for example, there is a configuration including the following (b-1) to (b-3) illustrated in FIG.
(B-1) A light source 11 that irradiates the recording medium 12 (measurement substance) with irradiation light 11a.
(B-2) The light receiving unit 14 that receives the reflected light 11b generated when the measurement substance is irradiated with the irradiation light 11a.
(B-3) The movable support | pillar part 15 which changes the irradiation angle of irradiation light
(B-4) A signal processing circuit 20a connected to the light receiving unit 14 and a PC terminal 18 connected to the signal processing circuit 20a.

  Here, (b-2) is a means for acquiring information on reflected light. In (b-3), (b-2) is kept in the range of 90 ° to −90 ° in 0.1 ° increments while keeping the distance between (b-2) and the irradiation position 12a of the irradiation light 11a constant. It is a means to drive with. By (b-3), (b-2) can measure the brightness in increments of 0.1 ° in the range of 90 ° to -90 °. In the evaluation apparatus of FIG. 4, the light source 11 is installed so as to be movable while the distance from the irradiation position 12 a is kept constant by the movable support portion 15. For this reason, the irradiation angle of the irradiation light 11a can be adjusted using this movable support part 15. FIG. Further, (b-4) is a means for acquiring gloss information based on the reflected light information obtained from (b-2). Specifically, information regarding the reflected light 11b sensed by the light receiving unit 14 is converted into gloss information using the signal processing circuit 20a, and the PC terminal 18 acquires the gloss information obtained by this conversion.

  By the way, the gloss information of the substance changes depending on the irradiation angle of the irradiation light irradiated on the recording medium 12 to be evaluated and the reception angle of the reflected light 11b received by the light receiving unit 14. In the evaluation apparatus 1 of FIG. 4, the irradiation angle and the light reception angle 11b change by moving any one of the light source 11, the light receiving unit 14, and the recording medium 12 (measurement substance). Specifically, the light receiving angle of the reflected light 11a changes by moving the light receiving unit 14 or the measurement substance. Moreover, the irradiation angle of the irradiation light 11a changes by moving the light source 11 or the measurement substance.

In the evaluation apparatus of the present invention, as means for acquiring material texture information, for example, there is a configuration comprising the following (c-1) and (c-2) shown in FIG.
(C-1) Epi-illumination type optical microscope 16 and CCD camera 17
(C-2) Pixel processing circuit 20b connected to the CCD camera and PC terminal 18 connected to the pixel processing circuit 20b

  Here, (c-1) serves both as a means for obtaining an image of the substance and a means for obtaining the brightness distribution of this image. That is, an image (enlarged image) of the substance observed through the epi-illumination type optical microscope 16 is taken by the CCD camera 17.

  Further, (c-2) is a means for converting a two-dimensional image of the recording medium 12 to be evaluated photographed by the CCD camera 17 into material texture information. Specifically, the pixel processing circuit 20b is used to process a two-dimensional image of the recording medium 12 to be evaluated to obtain a brightness distribution of the image, and then process the brightness distribution to acquire material texture information. In the present invention, the form of the material texture information is not particularly limited, but is preferably information based on a numerical value represented by CIE L *, and more preferably obtained by Fourier transform from CIE L *. It is information expressed in granularity.

  In the evaluation apparatus of the present invention, as means for acquiring the brightness information of the material constituting the substance, means for measuring the regular reflectance when the recording medium 12 (measurement substance) is irradiated with light in the vertical direction. If it is, it will not specifically limit. For example, the above configuration (c-1) can be used.

  In the evaluation apparatus 1 of FIG. 4, the PC terminal 18 is means for acquiring color information, gloss information, texture information, and material brightness information, but is not limited to this, and based on the acquired information, the metallic material of the substance is obtained. It also serves as an evaluation means for evaluating feeling.

  The evaluation apparatus 1 in FIG. 4 can acquire various information such as color information, gloss information, texture information, and material brightness information, and can evaluate metallic feeling.

  1: evaluation device, 2: main body, 3: control unit, 11: light source, 11a: irradiation light, 12: recording medium to be evaluated, 13: integrating sphere type light receiving unit, 14: light receiving unit, 15: movable support column, 16: Epi-illumination type optical microscope, 17: CCD camera, 18: PC terminal, 19: Medium installation unit, 20a: Signal processing circuit, 20b: Pixel processing circuit

Claims (19)

Acquiring color information of a substance having a metallic feeling;
Obtaining gloss information of the substance;
Obtaining texture information of the substance;
Obtaining the glitter information of the material constituting the substance;
A method for evaluating a metallic feeling of the substance based on the color information, the gloss information, the texture information, and the glitter information. The step of acquiring the color information includes
A process of irradiating the substance with irradiation light and receiving reflected light from the substance to obtain information on the reflected light;
The method for evaluating a metallic feeling according to claim 1, further comprising: a process of acquiring the color information based on the information on the reflected light and the information on the irradiation light acquired in advance.   The method for evaluating a metallic feeling according to claim 2, wherein the reflected light from the substance is diffused light from the substance.   The metallic color evaluation method according to any one of claims 1 to 3, wherein the color information is information represented by CIE a * and b *. The step of acquiring the gloss information comprises:
A process of irradiating the substance with irradiation light;
A process of acquiring information of the reflected light by receiving reflected light generated by irradiating the substance with the irradiation light by a light receiving unit,
The method for evaluating a metallic feeling according to any one of claims 1 to 4, wherein the gloss information is obtained by repeatedly performing a light receiving angle of the reflected light continuously. .   The irradiation angle of the irradiation light or the reception angle of the reflected light is changed by moving at least one of the light source that emits the irradiation light, the light receiving unit that receives the reflected light, and the substance. The method for evaluating metallic feeling according to any one of claims 1 to 5. The step of acquiring the texture information
A process for obtaining an image of said substance;
Obtaining a brightness distribution of the image;
And a process of acquiring the texture information from the lightness distribution. The method for evaluating a metallic feeling according to any one of claims 1 to 6.   The metallic texture evaluation method according to any one of claims 1 to 7, wherein the texture information is information represented by CIE L *. The step of acquiring the glitter information includes
The step of measuring specular reflectance when irradiating irradiation light to the minute region of the substance, and acquiring the glitter information of the material constituting the substance based on the specular reflectance. The method for evaluating a metallic feeling according to any one of 1 to 8. An evaluation device for evaluating the metallic feel of a substance,
Means for obtaining color information of the substance;
Means for obtaining gloss information of the substance;
Means for obtaining texture information of the substance;
Means for acquiring brightness information of a material constituting the substance;
An evaluation apparatus comprising: an evaluation unit that evaluates a metallic feeling of the substance based on the color information, the gloss information, the texture information, and the glitter information. Means for obtaining the color information;
Means for irradiating the substance with irradiation light and receiving reflected light from the substance to obtain information on the reflected light;
The evaluation apparatus according to claim 10, further comprising means for acquiring the color information based on the information on the reflected light and the information on the irradiation light acquired in advance.   The evaluation apparatus according to claim 10 or 11, wherein the color information is information represented by CIE a * and b *. Means for acquiring the gloss information;
A light source for irradiating the substance with irradiation light;
A light receiving unit that receives reflected light generated when the substance is irradiated with the irradiation light;
Means for acquiring information of the reflected light from the light receiving unit;
Means for changing a light receiving angle of the reflected light received by the light receiving unit;
The evaluation apparatus according to claim 10, further comprising a unit that acquires the gloss information based on information on the reflected light. Means for changing the light receiving angle of the reflected light,
14. The evaluation apparatus according to claim 13, wherein the evaluation apparatus is a light receiving unit that receives the reflected light or a means that changes a light receiving angle of the reflected light by means for moving the substance. Means for acquiring the gloss information;
A light source for irradiating the substance with irradiation light;
A light receiving unit that receives reflected light generated when the substance is irradiated with the irradiation light;
Means for acquiring information of the reflected light from the light receiving unit;
Means for changing an irradiation angle of the irradiation light;
The evaluation apparatus according to claim 10, further comprising a unit that acquires the gloss information based on information on the reflected light. Means for changing the irradiation angle of the irradiation light,
16. The evaluation apparatus according to claim 15, wherein the evaluation apparatus is a means for changing an irradiation angle of the irradiation light by a light source that emits the irradiation light or a means for moving the substance. Means for acquiring the texture information;
Means for obtaining an image of said substance;
Means for obtaining a brightness distribution of the image;
The evaluation apparatus according to claim 10, further comprising a unit that acquires the texture information from the brightness distribution.   The evaluation device according to any one of claims 10 to 17, wherein the texture information is information represented by granularity obtained by performing Fourier transform from LIE of CIE. The means for acquiring the glitter information is
The means for measuring specular reflectance when irradiating irradiation light to a minute region of the substance, and acquiring the glitter information of the material constituting the substance based on the specular reflectance. The evaluation apparatus according to any one of 10 to 18.

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