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A silicon model of early visual processing

Mead, Carver A. and Mahowald, M. A. (1988) A silicon model of early visual processing. Neural Networks, 1 (1). pp. 91-97. ISSN 0893-6080. doi:10.1016/0893-6080(88)90024-X.

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An analog model of the first stages of retinal processing has been constructed on a single silicon chip. Each photoreceptor computes the logarithm of the incident light intensity. A resistive network is used to compute a spatially smoothed version of the receptor outputs. An amplified difference between the receptor signals and their smoothed counterparts forms a second-order spatial filter. Measured outputs from an experimental 48 × 48 pixel array show many of the characteristics of the bipolar cells in vertebrate retina.

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Additional Information:Copyright © 1988 Pergamon Journals. Received and accepted 5 October 1987.
Subject Keywords:Retina; Machine vision; Analog CMOS; Spatial filter; Neural model
Issue or Number:1
Record Number:CaltechAUTHORS:20141217-152336241
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52989
Deposited By: Kristin Buxton
Deposited On:17 Dec 2014 23:28
Last Modified:10 Nov 2021 19:46

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