1 November 2002 Distortion-invariant joint transform correlator based on a phase-encoding technique
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Optical Engineering, 41(11), (2002). doi:10.1117/1.1512664
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.
XiangYan Yuan, ChunKan Tao, DaYong Yu, MingSheng Huo, "Distortion-invariant joint transform correlator based on a phase-encoding technique," Optical Engineering 41(11), (1 November 2002). http://dx.doi.org/10.1117/1.1512664

Phase shift keying

Optical correlators

Joint transforms


Amplitude modulation

Optical filters

Fourier transforms

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