Space integrating sliding image optical correlator

Details Space integrating sliding image optical correlator Space integrating sliding image optical correlator

1993-12-17

1999-11-16

Chang, Jon

Image analysis

Image transformation or preprocessing

Correlation

382212, 708816, G06K 974

Patent

active

059871881

ABSTRACT:
An optical correlator includes at least one electrically addressable liquid crystal array, at least one LED array for generating a reference image which is modulated by changing the transmissivity of the liquid crystals in the liquid crystal array, and at least one two-dimensional large size photodiode, the photodiode receiving a modulated image from the liquid crystal array. LED and liquid crystal array are stacked together with a photodiode or an array of photodiodes with no space between, for an exceptionally simple, compact and inexpensive optical correlator structure.

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Ittycheriah et al. "An Optical Matrix-Vector Multiplier Project" IEEE Transactions on Education, vol. 34, Iss 4, Nov. 1991, pp. 317-321.

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