WO2021149444A1 - 測色計、情報処理装置及びプログラム - Google Patents

測色計、情報処理装置及びプログラム Download PDF

Info

Publication number
WO2021149444A1
WO2021149444A1 PCT/JP2020/048127 JP2020048127W WO2021149444A1 WO 2021149444 A1 WO2021149444 A1 WO 2021149444A1 JP 2020048127 W JP2020048127 W JP 2020048127W WO 2021149444 A1 WO2021149444 A1 WO 2021149444A1
Authority
WO
WIPO (PCT)
Prior art keywords
difference
reference value
color measurement
color
calculation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/048127
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
良隆 寺岡
知巳 瀬戸口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to US17/759,074 priority Critical patent/US20230048563A1/en
Priority to JP2021573025A priority patent/JPWO2021149444A1/ja
Publication of WO2021149444A1 publication Critical patent/WO2021149444A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J2003/466—Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J2003/467—Colour computing

Definitions

  • the present invention relates to a colorimeter, an information processing device, and a program capable of calculating and displaying a color difference between a color measurement value obtained by measuring a color of a sample to be measured and a reference value.
  • L * a * b * space there is an L * a * b * space as a general color space, where L * corresponds to brightness, a * corresponds to red-green, and b * corresponds to yellow-blue.
  • ⁇ L * corresponds to the brightness shift
  • ⁇ a * corresponds to the red-green shift
  • ⁇ b * corresponds to the yellow-blue shift, which is intuitive and widely used.
  • the sum of squares, ⁇ E * ab ⁇ ( ⁇ L * ⁇ 2 + ⁇ a * ⁇ 2 + ⁇ b * ⁇ 2), is also widely used.
  • ⁇ E * it is known that in high-saturation colors and the like, the color difference perceived visually and the color difference of the color measurement value do not match.
  • new color difference formulas ⁇ E * 94, CIEDE2000 and the like are known and used.
  • Patent Document 1 proposes a color management technique for automobile repair using a ⁇ E * 94 color difference formula in order to manage with a color difference formula having high visual consistency.
  • Patent Document 1 it is not possible to know which component is dominant among the brightness, saturation, and hue deviation of the color measurement value with respect to the reference value, the deviation direction and the deviation amount, and the user can manage the color. There is a problem that it is difficult to reflect in.
  • the present invention has been made to solve such a problem, and is a colorimeter and information processing that allows a user to easily grasp the amount and direction of color deviation of a color measurement value with respect to a reference value.
  • the purpose is to provide equipment and programs.
  • a color measurement value acquisition means for acquiring a color measurement value by color measurement of a sample to be measured, a reference value acquisition means for acquiring a reference value, and a color measurement value and a reference value acquisition obtained by the color measurement value acquisition means.
  • ⁇ E * 94 [( ⁇ L * 94) 2 + ( ⁇ a * 94) 2 + ( ⁇ b * 94) 2 ] 1/2
  • Colorimeter with Colorimeter with ,. (2) The colorimeter according to item 1 above, wherein the calculation means calculates the ⁇ L * 94, ⁇ a * 94, and ⁇ b * 94 by the following equations, respectively.
  • a colorimeter provided with a calculation means for calculating ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc corresponding to a red-green difference and a yellow-blue difference, and a display means for displaying the calculation result by the calculation means.
  • the calculation means calculates the ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc by the following equations, respectively.
  • a colorimeter provided with a calculation means for calculating each of the above and a display means for displaying the calculation result by the calculation means.
  • the calculation means calculates the ⁇ L * eff ( ⁇ ), ⁇ a * eff ( ⁇ ), and ⁇ b * eff ( ⁇ ) by the following equations, respectively.
  • a measurement means that calculates ⁇ L' ⁇ , ⁇ a' ⁇ , and ⁇ b' ⁇ corresponding to the difference in brightness, the difference in red-green color, and the difference in yellow-blue, and a display means for displaying the calculation result by the calculation means.
  • Color meter (10) The colorimeter according to item 9 above, wherein the calculation means calculates the ⁇ L' ⁇ , ⁇ a' ⁇ , and ⁇ b' ⁇ by the following equations, respectively.
  • Information including a calculation means for calculating ⁇ L * 94, ⁇ a * 94, and ⁇ b * 94 corresponding to the difference in brightness, the difference in red-green, and the difference in yellow-blue, and a display means for displaying the calculation result by the calculation means.
  • processing equipment (12) The information processing apparatus according to item 11 above, wherein the calculation means calculates the ⁇ L * 94, ⁇ a * 94, and ⁇ b * 94 by the following equations, respectively.
  • An information processing device including a calculation means for calculating ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc corresponding to a red-green difference and a yellow-blue difference, and a display means for displaying the calculation result by the calculation means.
  • the calculation means calculates the ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc by the following equations, respectively.
  • Information processing provided with a calculation means for calculating ⁇ L * 00 , ⁇ a * 00 , and ⁇ b * 00 corresponding to the difference in brightness, the difference in red-green, and the difference in yellow-blue, and a display means for displaying the calculation result by the calculation means.
  • the calculation means calculates the ⁇ L * 00 , ⁇ a * 00 , and ⁇ b * 00 by the following equations, respectively.
  • a receiving means for receiving a color measurement value acquired by color measurement for a sample to be measured from a colorimeter, a reference value acquisition means for acquiring a reference value, and a color measurement value and a reference value received by the reception means. From the reference value acquired by the acquisition means, in the DIN 6175-2 color difference equation ⁇ E eff ( ⁇ ), ⁇ E eff ( ⁇ ) [( ⁇ L * eff ( ⁇ )) 2 + ( ⁇ a * eff ( ⁇ )) 2 + ( ⁇ b) * eff ( ⁇ )) 2 ] 1/2 relationship, and ⁇ L * eff ( ⁇ ), ⁇ a * eff ( ⁇ ), ⁇ b * eff ( ⁇ ) corresponding to the difference in brightness, red-green, and yellow-blue.
  • a receiving means for receiving a color measurement value acquired by color measurement for a sample to be measured from a colorimeter, a reference value acquisition means for acquiring a reference value, and a color measurement value and a reference value received by the reception means. From the reference value acquired by the acquisition means, there is a relationship of ⁇ E' ⁇ [( ⁇ L' ⁇ ) 2 + ( ⁇ a' ⁇ ) 2 + ( ⁇ b' ⁇ ) 2 ] 1/2 in the Audi2000 color difference equation ⁇ E' ⁇ . It also has a calculation means for calculating ⁇ L' ⁇ , ⁇ a' ⁇ , and ⁇ b' ⁇ corresponding to the difference in brightness, the difference in red-green, and the difference in yellow-blue, and a display means for displaying the calculation result by the calculation means.
  • a reception step of receiving a color measurement value acquired by color measurement for a sample to be measured from a colorimeter, a reference value acquisition step of acquiring a reference value, and a color measurement value and a reference value received by the reception step. From the reference value acquired by the acquisition means, there is a relationship of ⁇ E * 94 [( ⁇ L * 94) 2 + ( ⁇ a * 94) 2 + ( ⁇ b * 94) 2 ] 1/2 in the color difference equation ⁇ E * 94.
  • ⁇ Ecmc [( ⁇ L * cmc) 2 + ( ⁇ a * cmc) 2 + ( ⁇ b * cmc) 2 ] 1/2 , and the brightness difference. , Red-green difference, yellow-blue difference, ⁇ L * cmc, ⁇ a * cmc, ⁇ b * cmc, respectively, and a display step to display the calculation result by the calculation step on the display means.
  • Program for. The program according to item 23 above, wherein in the calculation step, the computer is made to execute a process of calculating the ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc by the following equations, respectively.
  • a reception step of receiving a color measurement value acquired by color measurement for a sample to be measured from a colorimeter, a reference value acquisition step of acquiring a reference value, and a color measurement value and a reference value received by the reception step. From the reference value acquired in the acquisition step, in CIEDE2000 color difference equation ⁇ E 00 , ⁇ E 00 [( ⁇ L * 00 ) 2 + ( ⁇ a * 00 ) 2 + ( ⁇ b * 00 ) 2 ] 1/2 , and ⁇ L * corresponding to the difference in brightness, red-green, and yellow-blue.
  • ⁇ E eff ( ⁇ ) [( ⁇ L * eff ( ⁇ )) 2 + ( ⁇ a * eff ( ⁇ )) 2 + ( ⁇ b) * eff ( ⁇ )) 2 ] 1/2 relationship, and ⁇ L * eff ( ⁇ ), ⁇ a * eff ( ⁇ ), ⁇ b * eff ( ⁇ ) corresponding to the difference in brightness, red-green, and yellow-blue.
  • the computer is made to execute a process of calculating the ⁇ L * eff ( ⁇ ), ⁇ a * eff ( ⁇ ), and ⁇ b * eff ( ⁇ ) by the following equations, respectively. program.
  • a reception step of receiving a color measurement value acquired by color measurement for a sample to be measured from a colorimeter, a reference value acquisition step of acquiring a reference value, and a color measurement value and a reference value received by the reception step. From the reference value acquired in the acquisition step, there is a relationship of ⁇ E' ⁇ [( ⁇ L' ⁇ ) 2 + ( ⁇ a' ⁇ ) 2 + ( ⁇ b' ⁇ ) 2 ] 1/2 in the Audi2000 color difference equation ⁇ E' ⁇ .
  • the difference in brightness and the difference in red-green color in the color difference equation ⁇ E * 94 from the color measurement value obtained by color measurement for the sample to be measured and the reference value. Since ⁇ L * 94, ⁇ a * 94, and ⁇ b * 94 corresponding to the yellow-blue difference are calculated and displayed, the user can easily grasp the amount of color deviation and the deviation direction of the color measurement value with respect to the reference value. ..
  • ⁇ L * 94, ⁇ a * 94, and ⁇ b * 94 corresponding to the difference in brightness, the difference in red-green, and the difference in yellow-blue can be reliably calculated. ..
  • the difference in brightness, the difference in red-green, and the difference in yellow-blue in the color difference formula ⁇ Ecmc from the color measurement value obtained by color measurement for the sample to be measured and the reference value. Since ⁇ L * cmc, ⁇ a * cmc, and ⁇ b * cmc corresponding to the difference are calculated and displayed, the user can easily grasp the amount of color deviation and the deviation direction of the color measurement value with respect to the reference value.
  • the difference in brightness and the difference in red-green color in the CIEDE2000 color difference formula ⁇ E 00 are obtained from the color measurement value obtained by color measurement of the sample to be measured and the reference value. Since ⁇ L * 00 , ⁇ a * 00 , and ⁇ b * 00 corresponding to the yellow-blue difference are calculated and displayed, the user can easily grasp the amount of color deviation and the deviation direction of the color measurement value with respect to the reference value. ..
  • ⁇ L * eff ( ⁇ ), ⁇ a * eff ( ⁇ ), and ⁇ b * eff ( ⁇ ) corresponding to the red-green difference and the yellow-blue difference are calculated and displayed respectively, so that the user can use the color of the color measurement value with respect to the reference value.
  • the amount of deviation and the direction of deviation can be easily grasped.
  • FIG. 1 A block diagram which shows the structure of the colorimeter which concerns on one Embodiment of this invention. It is a perspective view which shows the appearance of the colorimeter which concerns on this embodiment. It is a flowchart which shows the operation of the colorimeter of FIG. (A) is an enlarged view of a color discrimination circle (a range in which the difference in color cannot be discerned by the human eye) in the general color space L * a * b * space, and (b) is a color difference equation ⁇ E. It is the figure which shows the enlarged color discrimination circle in the case of * 94.
  • (A) to (c) are diagrams for explaining a state in which ⁇ E * 94 is divided into the ⁇ a * direction and the ⁇ b * direction.
  • FIG. 1 is a block diagram showing a configuration of a colorimeter according to an embodiment of the present invention.
  • the colorimeter 1 includes a colorimeter 2, a reference value acquisition unit 3, a calculation unit 4, and a display unit 5.
  • the color measurement unit (corresponding to the color measurement value acquisition means) 2 has a known configuration for measuring the color of the sample 100 to be measured and acquiring the color measurement value.
  • the reference value acquisition unit 3 acquires a reference value of a reference color to be compared with the color measurement value acquired by the color measurement unit 2.
  • the reference value acquisition unit 3 may actually perform the reference color measurement (reference color measurement) to acquire the reference value, or the storage means built in the own device or the external storage means (both are shown in the figure). You may obtain the value held as the reference value or the theoretical value from (1).
  • the color measurement unit 2 may also serve as the reference value acquisition unit 3.
  • the calculation unit 4 is composed of a computer equipped with a CPU, RAM, etc., and performs a calculation by applying a predetermined color difference formula from the color measurement value acquired by the color measurement unit 2 and the reference value acquired by the reference value acquisition unit 3. This point will be described in detail later.
  • the display unit 5 is composed of, for example, a liquid crystal device, and displays the calculation result or the like by the calculation unit 4.
  • the display may be a numerical display, or may be a graph or other figure.
  • FIG. 2 is a perspective view showing the appearance of the colorimeter 1 according to this embodiment.
  • the colorimeter 1 is configured to be a portable handy type.
  • the color measurement unit 2, the reference value acquisition unit 3, and the calculation unit 4 are housed in the housing 8. Further, the upper surface of the housing 8 is provided with a grip portion 82 for carrying and a display portion 5, and the lower surface of the housing 8 is further subjected to color measurement on the color-measured portion of the sample 100 to be measured.
  • the opening 81 for the purpose is formed.
  • the grip portion 82 is gripped and the opening 81 on the lower surface is positioned at the color-measured portion of the sample 100 to be measured. Then, in this state, the color measurement unit 2 housed inside the housing 8 measures the color, and the color measurement value acquired by the color measurement unit 2 and the reference value acquired by the reference value acquisition unit 3 are used. The calculation unit 4 calculates using the color difference formula, and the calculation result is displayed on the display unit 5.
  • FIG. 3 is a flowchart showing the operation of the colorimeter 1.
  • step S1 reference measurement is performed by the color measuring unit 2 that also serves as the reference value measuring unit 3, and in step 2, the measured values (reference values) (L * t, a * t, b * t) are obtained.
  • the reference value may be a predetermined value.
  • step S3 the measurement of the sample 100 to be measured (color difference measurement) is performed, and in step S4, the color measurement values (L * s, a * s, b * s) are obtained.
  • step S5 the color difference (for example, ⁇ E * 94) is calculated by the calculation unit 4 from the reference value acquired in step S2 and the color measurement value acquired in step S4, and the calculation result is calculated in step S6, for example, ⁇ L * 94. It is converted into ⁇ a * 94 and ⁇ b * 94 terms, and the obtained result is divided and displayed on the display unit 5 in step S7.
  • ⁇ E * 94 the color difference
  • the user can confirm which term is deviated in which direction ( ⁇ ) and perform color adjustment according to the result.
  • FIG. 4 (a) is an enlarged view showing a color discrimination circle (a range in which the difference in color cannot be discerned by the human eye) in the general color space L * a * b * space, FIG. 4 (b). Is an enlarged view showing the color discrimination circle in the case of the color difference equation ⁇ E * 94.
  • the samples S1 and S2 in the same color discrimination circle as the reference value (hereinafter, also referred to as the target) T appear to be the same color as the target T, but the distance from the target T is the same as the sample S2.
  • the sample S3 outside the color discrimination circle looks different from the target T and the sample S2.
  • the color difference equation that takes into account the change in the color discrimination circle in the high saturation range is ⁇ E * 94 shown in FIG.
  • ⁇ E * 94, ⁇ C * 94, and ⁇ H * 94 have the relationship as shown in FIG.
  • ⁇ L * 0.
  • T is a target and S is a sample.
  • FIG. 7B is an enlargement of FIG. 7A. The portion surrounded by the broken line in FIG. 7B is a visually acceptable range, that is, a range in which no difference is visually perceived.
  • the visual difference with respect to the target is felt as follows, for example.
  • Sample A OK (no deviation)
  • Sample C NG (with deviation)
  • Sample A: ⁇ E * 2.0
  • Sample B: ⁇ E * 2.0
  • Sample C: ⁇ E * 4.2 Contrary to the visual result that a difference is felt between the samples A and B, there is no difference in ⁇ E *, and the consistency with the visual inspection cannot be obtained.
  • ⁇ tan -1 ( ⁇ b * / ⁇ a *)
  • ⁇ a * a1-a0
  • ⁇ b * b1-b0 Therefore, if the change in brightness in the ⁇ Ecmc color difference equation is ⁇ L * cmc, the change in red-green is ⁇ a * cmc, and the change in yellow-blue is ⁇ b * cmc,
  • the following DIN6175-2 color difference formula is often used as a color difference evaluation index for metallic pearl paints whose brightness and color of objects differ depending on the observation angle.
  • the following Audi2000 color difference formula is often used as a color difference evaluation index for metallic pearl paints whose brightness and color of objects differ depending on the observation angle.
  • the calculation unit 4 and the display unit 5 are built in the colorimeter 1 is shown, but as shown in FIG. 9, the calculation unit 4 and the display unit 5 are personalized different from the colorimeter 1. It may be built in an information processing device 20 such as a computer.
  • the color measurement value obtained by the color measurement unit 2 of the colorimeter 1 is transmitted to the information processing device 20 via a network or the like, and the information processing device 20 receives the color measurement value at the receiving unit 21. , Calculate the division term from the received color measurement value and the reference value.
  • the color measurement unit 2 of the colorimeter 1 measures the color, and the colorimeter 1 calculates the acquired reference value and the color measurement value of the sample 100. It is transmitted to the information processing device 20, and the information processing device 20 receives the reference value and the color measurement value of the sample 100 at the receiving unit 21. Further, even when the reference value is held by the colorimeter 1, the reference value is transmitted to the information processing apparatus 20. When the reference value is held inside the information processing apparatus 20, it is acquired internally. When the reference value is stored in a place different from that of the colorimeter 1 or the information processing device 20, the information processing device 20 acquires the reference value from the storage place.
  • the present invention can be used as a colorimeter, an information processing device, or the like capable of calculating and displaying the color difference between the color measurement value obtained by measuring the color of the sample to be measured and the reference value.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)
PCT/JP2020/048127 2020-01-22 2020-12-23 測色計、情報処理装置及びプログラム Ceased WO2021149444A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/759,074 US20230048563A1 (en) 2020-01-22 2020-12-23 Colorimeter, information processing apparatus, and program
JP2021573025A JPWO2021149444A1 (https=) 2020-01-22 2020-12-23

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020008426 2020-01-22
JP2020-008426 2020-01-22

Publications (1)

Publication Number Publication Date
WO2021149444A1 true WO2021149444A1 (ja) 2021-07-29

Family

ID=76992280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/048127 Ceased WO2021149444A1 (ja) 2020-01-22 2020-12-23 測色計、情報処理装置及びプログラム

Country Status (3)

Country Link
US (1) US20230048563A1 (https=)
JP (1) JPWO2021149444A1 (https=)
WO (1) WO2021149444A1 (https=)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019060640A (ja) * 2017-09-25 2019-04-18 凸版印刷株式会社 表示装置判別システム、表示装置判別方法及びプログラム
JP2019201614A (ja) * 2018-05-25 2019-11-28 サッポロビール株式会社 ビールテイスト飲料

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680327A (en) * 1995-03-21 1997-10-21 Light Source Computer Images, Inc. Apparatus and process for a digital swatchbook
JP3265902B2 (ja) * 1995-03-28 2002-03-18 凸版印刷株式会社 色評価装置
CA2384127A1 (en) * 2000-07-07 2002-01-17 Kansai Paint Co., Ltd. Toning method of paint having brilliant feeling
JP2006292578A (ja) * 2005-04-12 2006-10-26 Konica Minolta Sensing Inc 異方性試料の色差評価方法及び測色システム
US7388656B2 (en) * 2005-12-30 2008-06-17 Yan Liu Method and system for color grading of gemstones
US8223336B2 (en) * 2009-07-31 2012-07-17 Eastman Kodak Company Method for converting digital color images
EP2375230A1 (en) * 2010-04-09 2011-10-12 Thomson Licensing Method for controlling an image display device to allow the same perception of colours over a large variety of observers
JP2012018118A (ja) * 2010-07-09 2012-01-26 Seiko Epson Corp 測色装置、及び測色方法
US9030580B2 (en) * 2013-09-28 2015-05-12 Ricoh Company, Ltd. Color filter modules for plenoptic XYZ imaging systems
US9683102B2 (en) * 2014-05-05 2017-06-20 Frontier Scientific, Inc. Photo-stable and thermally-stable dye compounds for selective blue light filtered optic
JP7331649B2 (ja) * 2019-11-12 2023-08-23 セイコーエプソン株式会社 分光測定方法および分光測定装置
US11326951B2 (en) * 2019-12-06 2022-05-10 Columbia Insurance Company System for colorimetry and a transformation from a non-uniform color space to a substantially uniform color space

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019060640A (ja) * 2017-09-25 2019-04-18 凸版印刷株式会社 表示装置判別システム、表示装置判別方法及びプログラム
JP2019201614A (ja) * 2018-05-25 2019-11-28 サッポロビール株式会社 ビールテイスト飲料

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OKAJIMA KATSUNORI: ""Visual Psychophysics (4) : Basic Knowledge on Color Appearance"", THE JOURNAL OF THE INSTITUTE OF IMAGE INFORMATION AND TELEVISION ENGINEERS, vol. 58, no. 4, 2004, pages 484 - 489, XP055843741 *

Also Published As

Publication number Publication date
JPWO2021149444A1 (https=) 2021-07-29
US20230048563A1 (en) 2023-02-16

Similar Documents

Publication Publication Date Title
Korifi et al. CIEL⁎ a⁎ b⁎ color space predictive models for colorimetry devices–Analysisof perfume quality
US7145656B2 (en) Computer-implemented method for matching paint
EP2265912A1 (en) Method for improved observer xyz functions
CN103428404A (zh) 颜色处理装置及颜色处理方法
CN104316192B (zh) 图像显示质量的测试方法、测试平台和系统
JP6929702B2 (ja) 情報処理装置、情報処理方法およびプログラム
JP2018500550A (ja) 色品質を決定するための特性番号
JP4636071B2 (ja) 色材選択補助装置及びそれらの方法並びにプログラム
JP7383793B2 (ja) 見本色と目標色とのスペクトル類似性を数値化するための方法およびシステム
WO2021149444A1 (ja) 測色計、情報処理装置及びプログラム
JP3601060B2 (ja) 測色データ処理装置
US6954547B2 (en) Method of deriving spectral sensitivity characteristics for color image inputting device and apparatus for same
Quanhui et al. The spectral radiance piecewise partition model for characterizing liquid crystal displays
CN106887219B (zh) 显示器画面生成方法及系统
JP2740412B2 (ja) 色差判定装置
Xu et al. Estimation of color-difference formulae at color discrimination threshold using CRT-generated stimuli
JP3353596B2 (ja) 色差の測定方法
JP2005277484A (ja) 色信号変換装置
Hirschler Electronic colour communication in the textile and apparel industry
JP2009042069A (ja) 色表示装置
JP4152786B2 (ja) メタリック塗膜の有するメタリック感の評価方法
JP6753238B2 (ja) 指標表示装置および指標表示プログラム
CN101147390A (zh) 色料配合率算出装置、色料选择辅助装置和它们的方法以及程序
WO2025173242A1 (ja) 等色関数決定方法、等色関数決定プログラムおよび等色関数決定装置
JP2012002704A (ja) 外観色質感評価方法、外観色質感評価装置及び外観色質感評価システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20915469

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021573025

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20915469

Country of ref document: EP

Kind code of ref document: A1