Orientation-Selective VLSI Retina

Tim Allen; Carver Mead; Federico Faggin; Glenn Gribble

doi:10.1117/12.969056

25 October 1988 Orientation-Selective VLSI Retina

Tim Allen, Carver Mead, Federico Faggin, Glenn Gribble

Proceedings Volume 1001, Visual Communications and Image Processing '88: Third in a Series; (1988) https://doi.org/10.1117/12.969056
Event: Visual Communications and Image Processing III, 1988, Cambridge, MA, United States

Abstract

In both biological and artificial pattern-recognition systems, the detection of oriented light-intensity edges is an important preprocessing step. We have constructed a silicon VLSI device containing an array of photoreceptors with additional hardware for computing center-surround (edge-enhanced) response as well as edge orientation at every point in the receptor lattice. Because computing the edge orientations in the array local to each photoreceptor would have made each pixel-computation unit too large (thereby reducing the resolution of the device), we devised a novel technique for computing the orientations outside of the array. All the transducers and computational elements are analog circuits made with a conventional CMOS process.

Citation Download Citation

Tim Allen, Carver Mead, Federico Faggin, and Glenn Gribble "Orientation-Selective VLSI Retina", Proc. SPIE 1001, Visual Communications and Image Processing '88: Third in a Series, (25 October 1988); https://doi.org/10.1117/12.969056

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