Abstract

Six experienced observers made consistent determinations of various colors which appeared the same with adaptation to tungsten light and to artificial daylight. These observations were made with each eye viewing a different color patch and with the patches appearing juxtaposed at the middle of a fused binocular field. The method was to make the two juxtaposed patches match by adjusting one of them, sometimes when both eyes were adapted to the same illumination and sometimes to the different illuminations. Plots of the data in the CIE chromaticity diagram indicate a systematic shift in color appearance toward the blues when adaptation was changed from daylight to tungsten; or toward the yellows when adaptation was changed from tungsten to daylight. The magnitude of this color shift was substantial, at least in the considerable color region investigated, for here the average length of the representative vectors was 0.10 in CIE terms or of the order of 20 just perceptible color differences. Qualitatively, the results confirm those of Hunt and of Winch and Young. The theoretical implications will be discussed in a later paper.

© 1952 Optical Society of America

Light and Dark Adaptation and the Perception of Color*

R. W. G. Hunt
J. Opt. Soc. Am. 42(3) 190-199 (1952)

The Effects of Daylight and Tungsten Light-Adaptation on Color Perception*,†

R. W. G. Hunt
J. Opt. Soc. Am. 40(6) 362-371 (1950)

Predictions of Shifts in Color Appearance with a Change from Daylight to Tungsten Adaptation

Robert W. Burnham
J. Opt. Soc. Am. 49(3) 254-263 (1959)

Color Appearance Specification with Adaptation to Daylight and Tungsten Illumination

R. W. Burnham and R. J. Malach
J. Opt. Soc. Am. 50(11) 1071-1074 (1960)

Prediction of Color Appearance with Different Adaptation Illuminations

R. W. Burnham, R. M. Evans, and S. M. Newhall
J. Opt. Soc. Am. 47(1) 35-42 (1957)