Median amplitude-compensated matched filter for optical pattern recognition

Arturo Carnicer

doi:10.1117/12.2308572

26 July 1993 Median amplitude-compensated matched filter for optical pattern recognition

Arturo Carnicer

Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 198349 (1993) https://doi.org/10.1117/12.2308572
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary

Abstract

The aim of this communication is to study one possible way of avoiding the limitations associated with mathematical poles and low optical efficiency of the inverse filter. In order to increase the performance characteristics of the filter, phase- only and inverse amplitude information are combined in a similar way to amplitude-compensated matched filter. A threshold value determines the ratio of filter frequencies in phase state or in inverse state. The behaviour of signal-to-noise ratio, discrimination and optical efficiency as a function of this threshold have been analyzed by digital simulation. According to the study, the median of the power spectrum reference histogram is an adequate threshold for filter design. By taking this value, satisfactory results of signal-to-noise ratio and discrimination have been obtained. With reference to optical efficiency, a significant increase has been observed by comparing with inverse filter or amplitude- compensated matched filter.

Citation Download Citation

Arturo Carnicer "Median amplitude-compensated matched filter for optical pattern recognition", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 198349 (26 July 1993); https://doi.org/10.1117/12.2308572

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