Abstract
At low light levels, a two-dimensional photon-counting detector may be employed to provide an estimate of the cross-correlation between an input image and a set of reference images stored in computer memory. Recent experiments1,2 have demonstrated that in many cases, a small number of detected photoevents is sufficient to yield reliable image recognition. The binary nature of the photonlimited input, coupled with the high rate of operation afforded by commercially available detectors, leads to recognition times on the order of tens of milliseconds.
© 1986 Optical Society of America
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