Non-zero-order joint transform correlator using random phase function in the input plane

G. Unnikrishnan; Joby Joseph; Kehar Singh

doi:10.1117/12.346828

29 April 1999 Non-zero-order joint transform correlator using random phase function in the input plane

G. Unnikrishnan, Joby Joseph, Kehar Singh

Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346828
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India

Abstract

We propose a new technique to eliminate zero order in a joint transform correlator (JTC). In the proposed technique, the input target and reference images in a JTC are modulated by identical random phase functions. This results in a sharpening of the zero order as well as the correlation peak in the correlation phase. The zero order can be eliminated by subtracting a constant value from the joint power spectrum. The proposed non-zero order JTC has better discrimination ability than a conventional JTC. A computer simulation study is presented to support the proposed technique.

Citation Download Citation

G. Unnikrishnan, Joby Joseph, and Kehar Singh "Non-zero-order joint transform correlator using random phase function in the input plane", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346828

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