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Proceedings Paper

Binary joint transform correlator thresholding on reference image only
Author(s): Zhaoqi Wang; Jiuhong Guan; Guoguang Mu; Baolai Liang; Hongli Liu
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Paper Abstract

In this work, we propose a novel thresholding method to simplify the procedure of the binary joint transform correlator. Unlike the normal binary joint transform correlator which thresholds on the power spectra of both the reference image and the target image, we threshold on the power spectra of the reference image only. With this technique the additional on-line recording of the power spectra of the target is avoided. Therefore the procedure of the recognition is as simple as that of the normal joint transform correlator. We then extend the binary joint transform correlator to circular harmonic expansion to achieve the rotation invariant optical pattern recognition. We use a computer to decompose the reference image into a sum of circular harmonic components and form an input of the joint transform correlator with the first-order circular harmonic component and the target image. By use of this technique, we achieve circular-harmonic-based binary joint transform correlation with good performance merits. Computer simulation results and 3D output correlation profiles are presented.

Paper Details

Date Published: 4 November 1999
PDF: 9 pages
Proc. SPIE 3898, Photonic Systems and Applications in Defense and Manufacturing, (4 November 1999); doi: 10.1117/12.368492
Show Author Affiliations
Zhaoqi Wang, Nankai Univ. (China)
Jiuhong Guan, Nankai Univ. (China)
Guoguang Mu, Nankai Univ. (China)
Baolai Liang, Nankai Univ. (China)
Hongli Liu, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 3898:
Photonic Systems and Applications in Defense and Manufacturing
Yee Loy Lam; Koji Ikuta; Metin S. Mangir, Editor(s)

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