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Proceedings Paper

Visual cortex neurons in monkey and cat: contrast response nonlinearities and stimulus selectivity
Author(s): Duane G. Albrecht; Wilson S. Geisler
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Paper Abstract

The contrast response functions of cat and monkey visual cortex neurons reveal two important nonlinearities: expansive response exponents and contrast gain control. These two nonlinearities (when combined with a linear spatiotemporal receptive field) can have beneficial consequences on stimulus selectivity. Expansive response exponents enhance stimulus selectivity introduced by previous neural interactions, thereby relaxing the structural requirements for establishing highly selective neurons. Contrast gain control maintains stimulus selectivity, over a wide range of contrasts, in spite of the limited dynamic response range and the steep slopes of the contrast response function.

Paper Details

Date Published: 17 March 1994
PDF: 20 pages
Proc. SPIE 2054, Computational Vision Based on Neurobiology, (17 March 1994); doi: 10.1117/12.171147
Show Author Affiliations
Duane G. Albrecht, Univ. of Texas/Austin (United States)
Wilson S. Geisler, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2054:
Computational Vision Based on Neurobiology
Teri B. Lawton, Editor(s)

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