Prediction of the Helmholtzs-Kohlrausch Effect on Object and Luminous Colors-I

Estimation in case of the Variable-Achromatic-Color Method

Abstract

A prediction method of the Helmholtz-Kohlrausch effect is developed by using the CIELUV formula, and it can predict the effect for object and luminous colors in the whole chromaticity gamut including spectral colors. The method gives equivalent lightness values to chromatic object colors with a constant luminance factor, and equivalent luminance values to chromatic luminous colors with a constant luminance. This condition of prediction is called the Variable-Achromatic-Color method. The predicted results by the developed method agree well with the corresponding experimental results reported so far.