Evaluation of whiteness

Abstract

The CIE tristimulus weighting functions have been applied to the colorimetric description of white surfaces. These functions, however, were derived from visual comparisons of high-purity colors, whereas white surfaces represent low-purity colors. No paper has dealt with the question of tristimulus weighting functions for low-purity white surfaces. The object of this paper is to discuss the boundaries between the white space and color space, to discuss the application of the tristimulus weighting functions to low-purity colors, and to show the correlation between visual appraisals of white with those derived from physical measurements.