Performance of mixed-metric optimized ternary correlation filters on realistic binary and gray-scale imagery

David L. Flannery; William Earl Phillips III; Dennis H. Goldstein

doi:10.1117/12.140909

12 January 1993 Performance of mixed-metric optimized ternary correlation filters on realistic binary and gray-scale imagery

David L. Flannery, William Earl Phillips III, Dennis H. Goldstein

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Proceedings Volume 1772, Optical Information Processing Systems and Architectures IV; (1993) https://doi.org/10.1117/12.140909
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The ternary phase-amplitude filter (TPAF) is by definition restricted to the modulation values -1, 0, and 1, thus comprising a binary phase-only filter (BPOF) multiplied by a binary- amplitude pattern, i.e., a region of support. The TPAF offers an attractive combination of real-time implementation with available devices and good correlation performance. Smart (optimized distortion-invariant) TPAF formulations have been developed. The TPAF enables filter implementation with magneto-optic devices and these devices also can be used for image input if gray scale scenes can be binarized while preserving good correlation performance. We provide simulation results addressing the comparative performance of mixed-metric smart TPAF's using gray scale, edge-enhanced and binary images derived from identical original scenes. The variation of filter performance with training set background intensity level is examined.

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David L. Flannery, William Earl Phillips III, and Dennis H. Goldstein "Performance of mixed-metric optimized ternary correlation filters on realistic binary and gray-scale imagery", Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); https://doi.org/10.1117/12.140909

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KEYWORDS

Image filtering

Binary data

Signal to noise ratio

Phase only filters

Modulation

Composites

Optical correlators

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