Abstract
Recent computational theories of color vision demonstrate that it is possible to achieve exact color constancy over a limited range of lights and surfaces described by linear models. First, I review this work, describing what is meant by a linear model. Second, I review evidence related to three conjectures concerning constraints on surface spectral reflectances: (1) that surface spectral reflectances fall within a linear model with a small number of parameters; (2) that surface spectral reflectances fall within a linear model composed of band-limited functions with a small number of parameters; and (3) that the broad, smooth shape of the spectral sensitivity of human photoreceptors enhance the observed constraints on surface reflectance functions.
© 1991 Optical Society of America
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