Abstract: The influence of illuminant, surface, and background on color constancy was investigated using computer simulation technology. The results showed that the characteristics of illuminant, surface, and background independently influenced the degree of color constancy. The degree of color constancy varied with illuminant change and reached the maximum under the neutral illuminant. Furthermore, the degree of color constancy fluctuated with surface variation in the surface matching test, which showed that color constancy was also dependent on the characteristics of the surface. The degree of color constancy in the same background was higher than that in a different background. Based on the results of the present study, a nonlinear color constancy model was established to approximate the test data. The model proved to be able to reflect the mechanism of human color constancy to a certain degree.

Key words: color constancy, illuminant, surface, background, nonlinear model