<title>Non-zero-order joint transform correlator using random phase function in the input plane</title>

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.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.