Abstract

The change of chromatic adaptation between observations made with a fluorescent lamp with correlated color temperature 6500 K and CIE standard source A was assessed by use of a subjective-estimation method. Thirteen observers were used. Individual variations and the average effects of chromatic adaptation were derived. The results were found to fall approximately in the middle of the range of results of previously reported studies. Lightness constancy was found, irrespective of the change of chromatic adaptation. The degree of color constancy of hue and of saturation is different for different Munsell hues, and discrimination of saturation becomes worse under source A than under the fluorescent lamp, approximately along the v axis of the CIE 1960 (<i>u</i>, <i>v</i>) diagram. The results are discussed with relation to several models for chromatic adaptation and color spacing.

© 1974 Optical Society of America

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