Non-zero order joint transform correlator based on wavelet transform

Yu Zhao; Xiaoying Sun

doi:10.1117/12.790750

19 February 2008 Non-zero order joint transform correlator based on wavelet transform

Yu Zhao, Xiaoying Sun

Proceedings Volume 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications; 662504 (2008) https://doi.org/10.1117/12.790750
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

A novel non-zero order joint transform correlator (NOJTC) is designed based on wavelet transform. In this technique, joint transform power spectrum (JPS) is decomposed into four sub-bands by wavelet function and is reconstructed using only horizontal or vertical detail coefficients (rely on alignment of the joint input images). Thus, zero order term is removed and desirable correlation signals are obtained. To achieve high discrimination ability, fringe-adjusted filter(FAF) and edge detection methods are applied to this wavelet-based non-zero order JTC (WNOJTC) and perform rather well. Detailed analysis followed by simulation results is presented to demonstrate the effectiveness of the proposed technique.

Citation Download Citation

Yu Zhao and Xiaoying Sun "Non-zero order joint transform correlator based on wavelet transform", Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 662504 (19 February 2008); https://doi.org/10.1117/12.790750

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KEYWORDS

Wavelets

Joint transforms

Wavelet transforms

Optical correlators

Edge detection

Information operations

Optical filters

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