Symbolic Substitution Implemented By Spatial Filtering Logic

Karl-Heinz Brenner; Adolf W. Lohmann; Thomas M. Merklein

doi:10.1117/12.7976966

1 April 1989 Symbolic Substitution Implemented By Spatial Filtering Logic

Karl-Heinz Brenner, Adolf W. Lohmann, Thomas M. Merklein

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Optical Engineering, Vol. 28, Issue 4, 284390 (April 1989). https://doi.org/10.1117/12.7976966

Abstract

Symbolic substitution is a method of performing parallel optical logic by recognition and substitution of structural elements. With spatial filtering it is possible to perform logic operations without an active logic gate. This paper describes how symbolic substitution can be implemented optically by use of spatial filtering. Earlier implementations used an additive logic, where shifted versions of the input pattern were added and then thresholded. Our new method is a multiplicative method that sequentially tests the pattern elements.

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Karl-Heinz Brenner, Adolf W. Lohmann, and Thomas M. Merklein "Symbolic Substitution Implemented By Spatial Filtering Logic," Optical Engineering 28(4), 284390 (1 April 1989). https://doi.org/10.1117/12.7976966

Published: 1 April 1989

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