Abstract
A joint-Fourier-transform (JFT) correlation technique wherein the reference image is synthesized from the point-spread function (PSF) of a preselected filter is investigated. The phase-only filter (POF) and one of its variations are considered to be possible candidates for the synthetic PSF. Filters with optical distortion invariance and higher discrimination can be easily implemented with the use of this technique, resulting in an efficient target recognition system. (C) 1997 John Wiley & Sons. Inc.