An APS with 2-D WTA selection employing adaptive spatial filtering, bad pixel elimination and false alarm reduction

An APS (active pixel sensor) with 2D winner-take-all detection is presented. The system employs adaptive spatial filtering of the processed image with bad pixel elimination and false alarm reduction in case of a missing object. The circuit has a unique ability of adaptive spatial filtering that allows removal of the background from the image, one stage before it is transferred to the WTA detection circuit. A 64/spl times/64 test chip has been implemented in 0.5 /spl mu/m CMOS technology with 3.3 V supply and is expected to dissipate 128 mW at video rate. System operation is discussed and simulation results are presented.

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