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Proceedings Paper

Optical wavelet correlators for cluttered target identification
Author(s): Xiangyang Yang; Nicholas P. Caviris; Mary Wen
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Paper Abstract

Novel optical wavelet correlators are presented in this paper. Instead of computing the correlation between the target and the reference patterns, these optical wavelet correlators compute the correlation between the wavelet transform coefficients of the target and reference patterns. It incorporates the efficient feature detection and noise suppression capabilities of wavelet transformation and the inherent high sped and 2D nature of objects. The feature extraction and target identification operations are performed in a single step. By suitably choosing the wavelet functions and their dilation factors, these wavelet correlators are capable of effectively recognizing targets in the presence of clutter and noise. Architectures for both Vander Lugt-type wavelet correlator and wavelet joint transform correlator are discussed in the paper. A wavelet function especially suitable for optical implementation is described. Preliminary experimental results are provided.

Paper Details

Date Published: 1 March 1994
PDF: 17 pages
Proc. SPIE 2237, Optical Pattern Recognition V, (1 March 1994); doi: 10.1117/12.169446
Show Author Affiliations
Xiangyang Yang, Quantex Corp. (United States)
Nicholas P. Caviris, Naval Surface Warfare Ctr. (United States)
Mary Wen, Sensci Corp. (United States)

Published in SPIE Proceedings Vol. 2237:
Optical Pattern Recognition V
David P. Casasent; Tien-Hsin Chao, Editor(s)

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