Experimental comparison of optical binary phase-only filter and high-pass matched filter correlation

Kenneth G. Leib; Robert W. Brandstetter; Marvin D. Drake; Glen B. Franks; Ronald O. Siewert

doi:10.1117/12.45737

1 July 1991 Experimental comparison of optical binary phase-only filter and high-pass matched filter correlation

Kenneth G. Leib, Robert W. Brandstetter, Marvin D. Drake, Glen B. Franks, Ronald O. Siewert

Proceedings Volume 1483, Signal and Image Processing Systems Performance Evaluation, Simulation, and Modeling; (1991) https://doi.org/10.1117/12.45737
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

An experimental comparison of two optical correlation systems in their ability to do target detection, identification, and discrimination is described. A common set of four binary input images was used for the experiments, which included single and multiple target scenes. The set included symmetric and asymmetric objects. The two optical correlation systems compared were (a) a high pass matched filter (HPMF) VanderLugt system and (b) a binary phase-only filter (BPOF) system. In the HPMF system, the input image and filter are film-based, with the filter somewhat Gaussian apodized to achieve high passing. The BPOF system has one magneto-optical spatial light modulator as the input device, and another as the filter device. The experimental measurements compared were (1) target auto- and crosscorrelation, (2) auto- and crosscorrelation for multiple target scenes, (3) spatial extent of the correlation peaks, and (4) sidelobe levels in multiple target scenes. In spite of the fundamental differences in the correlators compared (i.e., film vs. real time image/filter), the use of binary imagery and high pass filters in both cases gave comparable results in target detection, identification, and discrimination. Both the similarities and the differences are described and summarized.

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Kenneth G. Leib, Robert W. Brandstetter, Marvin D. Drake, Glen B. Franks, and Ronald O. Siewert "Experimental comparison of optical binary phase-only filter and high-pass matched filter correlation", Proc. SPIE 1483, Signal and Image Processing Systems Performance Evaluation, Simulation, and Modeling, (1 July 1991); https://doi.org/10.1117/12.45737

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KEYWORDS

Optical correlators

Optical filters

Phase only filters

Image filtering

Spatial light modulators

Target detection

Linear filtering

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