An only-one correlation-peak joint transform correlator based on Mach-Zehnder interferometer is presented aiming at the shortcomings in the energy dispersion of correlation peak and of Classic Joint Transform Correlator(CJTC) the input image size and relative position to be restricted.

Enhancing correlation peak value in VLC by diffraction characteristic of SLM;

According to the condition of the correlation peak,the outline of the longitudinal section along the climax of the correlation peak is fitted by parabola.

According to the condition of the adret of the correlation peak, the template timely and flexibly adjusts the value of N to carry out a fine search in order not to omit the climax of the correlation peak.

The optimized match spatial filter yields a higher correlation peak and a greater SNR when compared with the original BPOF;in the meantime the outpu t result has been improved to a great degree.

The direct current spot influence the recognition to correlated peak because its high-intensity lead to the saturation of photo surface of CCD.

The main contents of this subject are the design of video tracking system, the implemention of correlation tracking algorithms and algorithms for stable track in multi-correlation peaks situation.