colorimetry

colorimetry (In French métrique des couleurs) mathematical description of the distance relationships in the color space; low colorimetry describes the phenomenon of color vision and defines standard light sources (standard illuminants), higher colorimetry is dedicated to the evaluation of color differences (color difference formulae). In the final resort, the comparability of color perceptions is based on the comparability of chromatic stimuli, which as localized vectors in the color space offer a figure or value-based description of color perceptions, i.e. are in a position to define distances between two points (namely coordinate zero point and a chromaticity coordinate) and a color measurement can only be effected on the basis of a distance definition and general comparability