Abstract

Multiple-target detection with a modified amplitude-modulated joint transform correlator is proposed. With this technique the joint power spectrum is first modified by the subtraction of the power spectrum of the input scene only and of the reference image from it; the resultant modified joint power spectrum is next multiplied by the amplitude-modulated filter function. The effect of noise in the input scene on the performance of the joint transform correlator is analyzed and quantified. This technique is found to deliver a correlation output and the capacity to accommodate noise in the input scene better than both the fringe-adjusted filter-based joint transform correlator and the modified fringe-adjusted filter-based joint transform correlator.

© 1997 Optical Society of America

Modified fringe-adjusted joint transform correlation to accommodate noise in the input scene

RuiKang K. Wang, Lin Shang, and Chris R. Chatwin
Appl. Opt. 35(2) 286-296 (1996)

Fringe-adjusted joint transform correlation

Mohammad S. Alam and Mohammad A. Karim
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Distortion-invariant fringe-adjusted joint transform correlation

Mohammad S. Alam, Xue-wen Chen, and Mohammad A. Karim
Appl. Opt. 36(29) 7422-7427 (1997)

Joint-transform correlation under varying illumination

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Reference phase-encoded fringe-adjusted joint transform correlation

Abdallah K. Cherri and Mohammad S. Alam
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