An Efficient Implementation of Joint Fourier Transform Correlation Using a Modified LCTV

The joint Fourier transform correlation (JFTC) algorithm is implemented using a modified Citizen liquid crystal television (LCTV) which acts as a spatial light modulator in the amplitude mode. Using a combination of optics and electronics, results are obtained in real time (1/30 of a second). The video output is introduced into a video processing system to eliminate the noise inherent when using a coherent, monochromatic source. An optical disk is used to eliminate the dc term in the correlation plane and obtain only the correlation peaks.