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Adams chromatic valence color spaces are a class of color spaces suggested by Elliot Quincy Adams. Two important Adams chromatic valence spaces are CIELUV and Hunter Lab. Chromatic value/valence spaces are notable for incorporating the opponent process model, and the empirically-determined 2½ factor in the red/green vs. blue/yellow chromaticity components (such as in CIELAB). ==Chromatic value== In 1942, Adams suggested chromatic ''value'' color spaces. Chromatic value, or ''chromance'', refers to the intensity of the opponent process responses, and is derived from Adams' theory of color vision. A chromatic value space consists of three components: * the Munsell-Sloan-Godlove value function: * , the red-green chromaticity dimension, where is the value function applied to instead of Y * , the blue-yellow chromaticity dimension, where is the value function applied to instead of Y A chromatic value diagram is a plot of (horizontal axis) against (vertical axis). The 2½ scale factor is intended to make radial distance from the white point correlate with the Munsell chroma along any one hue radius (i.e., to make the diagram perceptually uniform). For achromatic surfaces, and hence , . In other words, the white point is at the origin. Constant differences along the chroma dimension did not ''appear'' different by a corresponding amount, so Adams proposed a new class of spaces, which he termed chromatic ''valence''. These spaces have "nearly equal radial distances for equal changes in Munsell chroma".〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Adams chromatic valence color space」の詳細全文を読む スポンサード リンク
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