Optical wavelet correlators for cluttered target identification

Xiangyang Yang; Nicholas P. Caviris; Mary Wen

doi:10.1117/12.169446

1 March 1994 Optical wavelet correlators for cluttered target identification

Xiangyang Yang, Nicholas P. Caviris, Mary Wen

Proceedings Volume 2237, Optical Pattern Recognition V; (1994) https://doi.org/10.1117/12.169446
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

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.

Citation Download Citation

Xiangyang Yang, Nicholas P. Caviris, and Mary Wen "Optical wavelet correlators for cluttered target identification", Proc. SPIE 2237, Optical Pattern Recognition V, (1 March 1994); https://doi.org/10.1117/12.169446

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