Time-derivative adaptive silicon photoreceptor array

Tobi Delbruck; Carver A. Mead

doi:10.1117/12.49323

1 November 1991 Time-derivative adaptive silicon photoreceptor array

Tobi Delbruck, Carver A. Mead

Proceedings Volume 1541, Infrared Sensors: Detectors, Electronics, and Signal Processing; (1991) https://doi.org/10.1117/12.49323
Event: San Diego, '91, 1991, San Diego, CA, United States

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.

Citation Download Citation

Tobi Delbruck and Carver A. Mead "Time-derivative adaptive silicon photoreceptor array", Proc. SPIE 1541, Infrared Sensors: Detectors, Electronics, and Signal Processing, (1 November 1991); https://doi.org/10.1117/12.49323

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