1 June 1996 Nonlinear joint transform correlator by interframe processing of multi-intensity imagery
Author Affiliations +
Optical Engineering, 35(6), (1996). doi:10.1117/1.600750
In a nonlinear joint transform correlator, the joint power spectrum (JPS) is detected by a CCD camera before nonlinear processing. Since the JPS is a high-dynamic-range image, it cannot be recorded by a CCD camera of narrow response range. The multi-intensity imagery technique is proposed to cope with the detection of the JPS by a CCD camera by multiple recordings at different intensities. With the multiintensity imagery an effective nonlinearity by interframe processing of data block ‘‘cut and paste’’ can be performed easily to build a highcontrast JPS. The technique can improve the correlation performance significantly by transferring a part of dc energy to harmonic terms of interest. The involved theoretical explanation and experimental demonstration are given.
Zikuan Chen, Guoguang Mu, "Nonlinear joint transform correlator by interframe processing of multi-intensity imagery," Optical Engineering 35(6), (1 June 1996). http://dx.doi.org/10.1117/1.600750

Image processing

Fourier transforms

Joint transforms

Optical correlators

CCD cameras


Image segmentation


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