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Published 1992 | Published
Book Section - Chapter Open

Direction Selective Silicon Retina that uses Null Inhibition

Abstract

Biological retinas extract spatial and temporal features in an attempt to reduce the complexity of performing visual tasks. We have built and tested a silicon retina which encodes several useful temporal features found in vertebrate retinas. The cells in our silicon retina are selective to direction, highly sensitive to positive contrast changes around an ambient light level, and tuned to a particular velocity. Inhibitory connections in the null direction perform the direction selectivity we desire. This silicon retina is on a 4.6 x 6.8mm die and consists of a 47 x 41 array of photoreceptors.

Additional Information

© 1992 Morgan Kaufmann. Our thanks to Carver Mead and John Hopfield for their guidance and encouragement, to the Office of Naval Research for their support under grant NAV N00014-89-J-1675, and, of course, to the MOSIS fabrication service.

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Created:
August 20, 2023
Modified:
January 13, 2024