Abstract

A two-dimensional, time-dependent analysis of the mammalian retina is presented. A computer simulation of experimental data considers ganglion-cell activity as a two-dimensional process. The properties of the simulation model were examined with several input stimuli. Circular receptive fields enhance not only borders, but other spatial complexities, such as ends of lines and angles. The enhancement is remarkably insensitive to the shape of receptive fields. The processing of the input picture by on-center and off-center receptive fields is complementary but the division of labor varies with the task.

© 1975 Optical Society of America

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