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Uniform‐scale chromaticity diagrams: Opponent‐chromatic responses as logarithms of the cone‐activation ratios
Author(s) -
Oleari Claudio
Publication year - 1998
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/(sici)1520-6378(199802)23:1<27::aid-col5>3.0.co;2-5
Subject(s) - chromaticity , chromatic scale , hue , logarithm , cone (formal languages) , optics , color vision , mathematics , physics , mathematical analysis , algorithm
Chromatic‐response functions and a uniform‐scale chromaticity diagram are derived by assuming that normal trichromatic vision is obtained by combining tritanopic and deuteranopic vision. Two different opponent‐chromatic mechanisms can be related to these two dichromatic visions. The chromatic‐response functions obtained are the logarithms of proper cone‐activation ratios (CAR). Each opponent‐chromatic mechanism consists of two parts separated by a properly defined neutral point that depends on the surround chromaticity. The Abney‐hue shift, the wavelength discrimination for trichomats, deuteranopes, and tritanopes, and the threshold purity are well reproduced. © 1998 John Wiley & Sons, Inc. Col Res Appl, 23, 27–38, 1998