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An Efficient Implementation of Joint Fourier Transform Correlation Using a Modified LCTV
Author(s) -
Perez O.,
Karim M. A.
Publication year - 1989
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650020602
Subject(s) - fourier transform , optical correlation , monochromatic color , joint (building) , spatial light modulator , optics , fast fourier transform , noise (video) , computer science , correlation , optical correlator , liquid crystal display , electronic engineering , algorithm , physics , mathematics , artificial intelligence , engineering , mathematical analysis , geometry , architectural engineering , image (mathematics)
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.