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Optical Engineering

Distortion-invariant joint transform correlator based on a phase-encoding technique
Author(s): XiangYan Yuan; ChunKan Tao; DaYong Yu; MingSheng Huo
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Paper Abstract

Based on the theory of synthetic discriminant function, several subreference images are synthesized to realize distortion-invariant recognition. Using a phase-encoding technique and amplitude modulation on a joint power spectrum, the proposed joint transform correlator greatly reduces the intensity and width of the strong dc component, sharpens the correlation peak, and eliminates cross-correlations between each input target and the conjugate cross-correlation between the reference and input targets, which exist in the classical joint transform correlator. All these achievements are accomplished in only one step. At the end, a computer simulation is given, which proves the efficiency of the proposed method.

Paper Details

Date Published: 1 November 2002
PDF: 7 pages
Opt. Eng. 41(11) doi: 10.1117/1.1512664
Published in: Optical Engineering Volume 41, Issue 11
Show Author Affiliations
XiangYan Yuan, Nanjing Univ. of Science and Technology (China)
ChunKan Tao, Nanjing Univ. of Science and Technology (China)
DaYong Yu, Nanjing Univ. of Science and Technology (China)
MingSheng Huo, Nanjing Univ. of Science and Technology (China)

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