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Proceedings Paper

Multiple Matched Spatial Filter Performed With Nonsymmetrical Fourier Transformers
Author(s): Carlos Ferreira; Carmen Vazquez
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Paper Abstract

Classical matched spatial filters (CMSF) have been successfully employed for optical pattern recog-nition. To detect different signals, multiple matched spatial filters can be synthesized and several methods to perform the filters have been developed. Based on the sensitivity to input orientation of CMSF, we proposed a filter [1] where the signals to be detected were rotated by different angles when recording the hologram. Thus, the recognition of a signal is only achieved when the input in the filtering system has been suitably rotated. The number of signals simultaneously recorded was limited by the angular tolerance of symmetrical correlators, of the order of ten degrees [2] for CMSF.

Paper Details

Date Published: 1 January 1987
PDF: 2 pages
Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); doi: 10.1117/12.967306
Show Author Affiliations
Carlos Ferreira, Universitat de Valencia (Spain)
Carmen Vazquez, Universitat de Valencia (Spain)


Published in SPIE Proceedings Vol. 0813:
Optics and the Information Age

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