Knowledge

Colorimetry

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with the illuminant's spectral power distribution). One benefit of spectrocolorimeters over tristimulus colorimeters is that they do not have optical filters, which are subject to manufacturing variance, and have a fixed spectral transmittance curve—until they age. On the other hand, tristimulus
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MATLAB toolbox for color science computation and accurate color reproduction (by Jesus Malo and Maria Jose Luque, Universitat de Valencia). It includes CIE standard tristimulus colorimetry and transformations to a number of non-linear color appearance models (CIE Lab, CIE CAM,
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recommends using measurement intervals under 5 nm, even for smooth spectra. Sparser measurements fail to accurately characterize spiky emission spectra, such as that of the red phosphor of a CRT display, depicted aside.
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A guide to measuring color and appearance of objects. The section provides information on numerical scales and indices that are used throughout the world to remove subjective measurements and assumptions.
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should be done to make different light sources appear to have the same color temperature. If the user enters the reference color temperature, the meter can calculate the
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Two spectral reflectance curves. The object in question reflects light with shorter wavelengths while absorbing those in others, lending it a blue appearance.
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The process recommended by the CIE for computing the tristimulus values is to use 1 nm interval or 5 nm interval if the spectral function is smooth
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curve (how much it reflects, as a function of wavelength)—the most accurate data that can be provided regarding its characteristics.
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Colorimetric equipment is similar to that used in spectrophotometry. Some related equipment is also mentioned for completeness.
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may be used. A spectrocolorimeter is simply a spectrophotometer that can estimate tristimulus values by
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range of 400–700 nm will yield 31 readings. These readings are typically used to draw the sample's
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difference between the measurement and the reference, enabling the user to choose a corrective
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An informative brochure with background information and specifications of their equipment.
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is "the science and technology used to quantify and describe physically the human
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Schanda, János (2007). "Tristimulus Color Measurement of Self-Luminous Sources".
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ensure consistency throughout the imaging workflow, from acquisition to output.
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The Focal Encyclopedia of Photography: Digital Imaging, Theory and Application
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Journal of Research of the National Institute of Standards and Technology
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Technique to quantify and describe physically the human color perception
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can be calculated from the tristimulus values by first calculating the
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measures the degree of light passing through or reflected by a subject.
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This article is about measurement of color. For use in chemistry, see
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Andreas Brant, GretagMacbeth Corporate Support (7 January 2005).
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Precise Color Communication – from perception to instrumentation
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The readings by themselves are typically not as useful as their
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The normals are lines of equal correlated color temperature.
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colorimeters are purpose-built, cheaper, and easier to use.
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FAQ | How to Measure Color of a Sample & Use An Index
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use information provided by these meters to decide what
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Spectroradiometer, spectrophotometer, spectrocolorimeter
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Peres (ed.). 181:, colorimeters are tristimulus devices used for 281:CIE (International Commission on Illumination) 902: 415: 601:Raymond Cheydleur, X-Rite (8 January 2005). 125:, or relative irradiance of a color sample. 95:measures the tristimulus values of a color. 61:CIE 1931 XYZ color space tristimulus values 1921: 909: 895: 287: 166: 785: 634: 535:Colorimetry: Understanding the CIE System 528: 526: 201:of a light source can be measured with a 1690:International Commission on Illumination 339:, then finding the closest point on the 314: 238: 212:Reflected color can be measured using a 157: 825: 754: 668: 532: 384:CIE Fundamentals for Color Measurements 14: 1939: 1680:Color Association of the United States 523: 890: 630: 628: 500:Introduction to Color Imaging Science 489: 487: 485: 460: 458: 255:co-ordinates and manipulated through 709: 380: 323:Internally the meter is typically a 251:values, which can be converted into 755:Gardner, James L. (May–June 2007). 493: 24: 1544:Blue–green distinction in language 662: 625: 482: 455: 25: 1973: 873: 1920: 1911: 1910: 1701:International Colour Association 1284: 916: 132:is a spectrophotometer that can 381:Ohno, Yoshi (16 October 2000). 312:with the closest mired factor. 102:measures the absolute spectral 1696:International Color Consortium 1685:International Colour Authority 719:Digital Color Imaging Handbook 678:Handbook of Applied Photometry 676:. In Casimer DeCusatis (ed.). 594: 563: 436: 419:Digital Color Imaging Handbook 409: 374: 82: 13: 1: 1761:List of Crayola crayon colors 826:MacEvoy, Bruce (8 May 2008). 680:. OSA/AIP. pp. 327–412. 496:"15.1: Spectral Measurements" 422:. CRC Press. pp. 15–17. 368: 327:tristimulus colorimeter. The 32:Colorimetry (chemical method) 329:correlated color temperature 228:increments is followed, the 7: 1564:Traditional colors of Japan 1341:Achromatic colors (Neutral) 1224:Multi-primary color display 998:Spectral power distribution 346: 257:color space transformations 199:spectral power distribution 10: 1978: 717:. In Gaurav Sharma (ed.). 669:Schanda, János D. (1997). 504:Cambridge University Press 170: 154:of an incident illuminant. 66: 36: 29: 1906: 1878: 1791: 1716: 1709: 1660: 1579: 1529: 1461: 1452: 1424:Color realism (art style) 1371: 1304: 1293: 1282: 1182: 1129: 1082:Evolution of color vision 1011: 934: 925: 852:Konica Minolta Sensing – 712:"Device Characterization" 603:"Colorimeter vs. Spectro" 572:"Colorimeter vs. Spectro" 547:10.1002/9780470175637.ch6 1741:List of colors (compact) 1559:Color in Chinese culture 1209:Digital image processing 942:Electromagnetic spectrum 269:color matching functions 63:and related quantities. 37:Not to be confused with 1746:List of colors by shade 494:Lee, Hsien-Che (2005). 288:Color temperature meter 259:. For this purpose, a 173:Tristimulus colorimeter 167:Tristimulus colorimeter 148:color temperature meter 93:tristimulus colorimeter 1751:List of color palettes 867:related to colorimetry 607:Colorsync-users Digest 576:Colorsync-users Digest 416:Gaurav Sharma (2002). 320: 244: 163: 117:measures the spectral 1675:Color Marketing Group 1430:On Vision and Colours 1363:Tinctures in heraldry 974:Structural coloration 318: 265:numerical integration 242: 161: 1756:List of color spaces 1648:Tint, shade and tone 1531:Cultural differences 1346:Polychromatic colors 1331:Complementary colors 1319:Monochromatic colors 778:10.6028/jres.112.010 697:on 17 September 2005 541:. pp. 135–157. 506:. pp. 369–374. 466:"ICC White Paper #5" 337:CIE 1960 color space 335:co-ordinates in the 234:spectral reflectance 218:spectroreflectometer 55:". It is similar to 1952:Physical quantities 1736:List of colors: N–Z 1731:List of colors: G–M 1726:List of colors: A–F 710:Bala, Raja (2003). 310:photographic filter 136:tristimulus values. 73:Duboscq colorimeter 1783:List of web colors 1778:List of RAL colors 1184:Color reproduction 1149:Lüscher color test 986:Color of chemicals 865:NIST Publications 539:Wiley Interscience 449:8 May 2013 at the 325:silicon photodiode 321: 292:Photographers and 261:spectrocolorimeter 245: 164: 130:spectrocolorimeter 110:of a light source. 1934: 1933: 1874: 1873: 1656: 1655: 1448: 1447: 1438:Theory of Colours 1280: 1279: 1192:Color photography 1144:Color preferences 1087:Impossible colors 1077:Color vision test 1072:Color temperature 1050:Color calibration 979:Animal coloration 732:978-0-8493-0900-7 687:978-1-56396-416-9 652:978-0-240-80740-9 556:978-0-470-04904-4 443:Cal Poly Humboldt 429:978-0-8493-0900-7 214:spectrophotometer 203:spectroradiometer 183:color calibration 152:color temperature 115:spectrophotometer 100:spectroradiometer 75:was invented by 57:spectrophotometry 16:(Redirected from 1969: 1924: 1923: 1914: 1913: 1714: 1713: 1580:Color dimensions 1569:Human skin color 1459: 1458: 1336:Analogous colors 1302: 1301: 1288: 1214:Color management 1131:Color psychology 1097:Opponent process 1013:Color perception 932: 931: 911: 904: 897: 888: 887: 842: 840: 838: 822: 820: 818: 812: 806:. 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Accurate 119:reflectance 83:Instruments 49:Colorimetry 39:Calorimetry 1962:Radiometry 1941:Categories 1793:Shades of: 1626:Brightness 1358:Web colors 1314:Color tool 1297:philosophy 1202:Color cast 1102:Afterimage 1092:Metamerism 1065:Color code 1060:Color task 1043:Dichromacy 817:2 February 369:References 363:Radiometry 358:Photometry 108:irradiance 1643:Grayscale 1616:Lightness 1611:Luminance 1420:(fashion) 1120:The dress 723:CRC Press 306:color gel 226:nanometer 134:calculate 79:in 1870. 43:Colometry 1916:Category 1898:Lighting 1621:Darkness 1441:(Goethe) 1241:additive 1229:Quattron 880:Colorlab 796:27110460 447:Archived 347:See also 267:(of the 104:radiance 1880:Related 1841:Magenta 1766:history 1670:Pantone 957:Visible 952:Rainbow 837:17 July 804:1949232 787:4656001 701:17 July 401:18 June 67:History 1893:Qualia 1888:Vision 1836:Purple 1831:Violet 1811:Yellow 1806:Orange 1501:Orange 1496:Purple 1486:Yellow 920:topics 883:etc.). 802:  794:  784:  729:  684:  649:  553:  510:  474:28 May 426:  1947:Color 1926:Index 1866:Black 1856:White 1851:Brown 1816:Green 1718:Lists 1710:Names 1692:(CIE) 1661:Color 1521:Brown 1516:White 1506:Black 1476:Green 1295:Color 991:Water 947:Light 918:Color 811:(PDF) 800:S2CID 760:(PDF) 746:5 May 740:(PDF) 715:(PDF) 695:(PDF) 674:(PDF) 617:6 May 586:6 May 469:(PDF) 395:(PDF) 388:(PDF) 302:mired 1861:Gray 1846:Pink 1826:Blue 1821:Cyan 1511:Gray 1491:Pink 1471:Blue 1258:CMYK 839:2008 819:2008 792:PMID 748:2008 727:ISBN 703:2008 682:ISBN 647:ISBN 619:2008 588:2008 551:ISBN 508:ISBN 476:2023 424:ISBN 403:2009 279:The 71:The 1801:Red 1587:Hue 1481:Red 1246:RGB 782:PMC 774:doi 770:112 543:doi 308:or 220:or 177:In 41:or 1943:: 830:. 798:. 790:. 780:. 768:. 762:. 725:. 721:. 627:^ 605:. 574:. 549:. 537:. 525:^ 516:. 502:. 498:. 484:^ 457:^ 343:. 271:' 146:A 139:A 128:A 121:, 113:A 98:A 91:A 910:e 903:t 896:v 869:. 841:. 821:. 776:: 750:. 705:. 655:. 621:. 590:. 559:. 545:: 478:. 432:. 405:. 45:. 34:. 20:)

Index

Colorimetric
Colorimetry (chemical method)
Calorimetry
Colometry
color perception
spectrophotometry
CIE 1931 XYZ color space tristimulus values
Duboscq colorimeter
Jules Duboscq
tristimulus colorimeter
spectroradiometer
radiance
irradiance
spectrophotometer
reflectance
transmittance
densitometer
color temperature

Tristimulus colorimeter
digital imaging
color calibration
color profiles
spectral power distribution
monochromator
nanometer
visible light
spectral reflectance

tristimulus

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