Abstract

Results of brightness-scaling experiments with complex stimulus fields are reported. A family of brightness functions has been computed from the data for complex stimuli such as photographic reproductions viewed with both illuminated and dark surrounds. The resulting brightness vs luminance functions are not simple power functions. They exhibit exponential decay from the power form as a function of both screen luminance and surround luminance; i.e., they are nonlinear in log–log coordinates.

© 1967 Optical Society of America

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