Time-derivative adaptive silicon photoreceptor array

Details Time-derivative adaptive silicon photoreceptor array Time-derivative adaptive silicon photoreceptor array

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1541...92d&link_type=abstract

Proc. SPIE Vol. 1541, p. 92-99, Infrared Sensors: Detectors, Electronics, and Signal Processing, T. S. Jayadev; Ed.

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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.

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