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Proceedings Paper

Effects Of Background Noise On The Design Of Binary Phase-Only Filters
Author(s): Jeffrey A. Davis; Don M. Cottrell; Timothy O. Fleck; Roger A. Lilly
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Paper Abstract

Optical correlator systems using the binary phase-only filter (BPOF) have shown excellent performance in a variety of both theoretical and experimental studies. The output of the system represents the correlation of the input function g(x,y) with the impulse response function of the BPOF designed for a given target pattern f(x,y). Unfortunately since this impulse response function contains both the desired pattern f(x,y) and and its inverted image f(-x,-y), the correlator output contains two signals representing the correlation of g(x,y) with both f(x,y) and f(-x,-y). The phase relationship between these two contributions can be varied depending on the algorithm used to make the BPOF. This paper discusses factors which influence the performance of the BPOF when the input pattern is degraded with background noise including the location of the object used to make the filter, the extent of the background noise, the algorithm used to make the BPOF, and object features which affect the filter response. In addition we will present a Fresnel lens-encoded BPOF which very greatly reduces the correlation with the f(-x,-y) term.

Paper Details

Date Published: 29 June 1989
PDF: 10 pages
Proc. SPIE 1053, Optical Pattern Recognition, (29 June 1989); doi: 10.1117/12.951535
Show Author Affiliations
Jeffrey A. Davis, San Diego State University (United States)
Don M. Cottrell, San Diego State University (United States)
Timothy O. Fleck, San Diego State University (United States)
Roger A. Lilly, San Diego State University (United States)

Published in SPIE Proceedings Vol. 1053:
Optical Pattern Recognition
Hua-Kuang Liu, Editor(s)

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