Abstract
Models for color conversion can be simplified if they avoid the problems associated with color spacing, and instead deal only with color equivalences of different samples seen under different illuminants. When viewed in this manner, the major problem of color conversion is reduced to one of chromatic adaptation, for which a nonlinear von Kries formulation may apply. Two modifications of the original von Kries coefficients are introduced: one dealing with the discounting of the illuminant, the second concerned with Helson’s contrast effect. The revised von Kries model is then used to predict the Land demonstrations, and is found to be as accurate as the more complicated Helson–Judd formulation.
© 1971 Optical Society of America
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