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Proceedings Paper

Time-derivative adaptive silicon photoreceptor array
Author(s): Tobi Delbruck; Carver A. Mead
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Paper Abstract

We designed and tested a two-dimensional silicon receptor array constructed from pixels that temporally high-pass filter the incident image. There are no surround interactions in the array; all pixels operate independently except for their correlation due to the input image. The high- pass output signal is computed by sampling the output of an adaptive, high-gain, logarithmic photoreceptor during the scanout of the array. After a pixel is sampled, the output of the pixel is reset to a fixed value. An interesting capacitive coupling mechanism results in a controllable high-pass filtering operation. The resulting array has very low offsets. The computation that the array performs may be useful for time-domain image processing, for example, motion computation.

Paper Details

Date Published: 1 November 1991
PDF: 8 pages
Proc. SPIE 1541, Infrared Sensors: Detectors, Electronics, and Signal Processing, (1 November 1991); doi: 10.1117/12.49323
Show Author Affiliations
Tobi Delbruck, California Institute of Technology (United States)
Carver A. Mead, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1541:
Infrared Sensors: Detectors, Electronics, and Signal Processing
T. S. Jay Jayadev, Editor(s)

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