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The standard observer is characterized by three color matching functions. There is also a 1 nm-interval dataset of CIE 1931 and CIE 1964 provided by Wyszecki 1982. [12] A CIE publication in 1986 appears also to have a 1 nm dataset, probably using the same data. [13] Like the regular 5 nm dataset, this dataset is also derived from interpolation.
This is by design; the XYZ color matching functions are normalized such that their integrals over the visible spectrum are the same. [1] Illuminant E is not a black body, so it does not have a color temperature, but it can be approximated by a D series illuminant with a CCT of 5455 K. (Of the canonical illuminants, D 55 is the closest.)
Color matching in the textile dyeing industry is essential. In this branch, three types of metamerism are commonly encountered: illuminant metamerism, observer metamerism and field-size metamerism. [citation needed] Due to the wide range of different illuminants in modern life, textile color matching is difficult to ensure. Metamerism on large ...
A camera or colorimeter is said to be colorimetric if it satisfies the Luther condition by Robert Luther (1868–1945) (also called the "Maxwell–Ives criterion"), [5] reducing observer metamerism color errors, if the product of the spectral responsivity of the photoreceptor and the spectral transmittance of the filters is a linear combination ...
The CIELAB color space, also referred to as L*a*b*, is a color space defined by the International Commission on Illumination (abbreviated CIE) in 1976. [a] It expresses color as three values: L* for perceptual lightness and a* and b* for the four unique colors of human vision: red, green, blue and yellow.
Matching colors or (in British English) colours usually refers to complementary colors, pairs or triplets of colors that harmonize well together. Matching colors may also refer to: Color management , the matching of color representations across various electronic devices.
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A "color model" is an abstract mathematical model describing the way colors can be represented as tuples of numbers (e.g. triples in RGB or quadruples in CMYK); however, a color model with no associated mapping function to an absolute color space is a more or less arbitrary color system with no connection to any globally understood system of ...