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
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