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Model for Visual Luminance Discrimination and Flicker Detection

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Abstract

A model for vision is proposed. Its basic units are RC stages whose time constants—in three instances—are parametrically controlled. The requirements of compressing the dynamic range of the input and of fitting luminance pulse-detection data suffice to determine the arrangement and parameters of the components. This model accurately predicts the psychophysical results of flicker detection (DeLange characteristics at above 10 Hz), the Ferry–Porter and Weber laws in the ranges where they apply, the effects of light adaptation, and it accounts for individual differences. By considering the variable RC stage as an approximate analog of a synaptic excitatory process which is controlled by inhibition, significant correspondences are observed between the internal connectivity of the model and the neural connectivity of the retina.

© 1968 Optical Society of America

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