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Binary phase only joint transform correlator
Author(s) -
Yu Francis T. S.,
Nagata Toshio
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.4650020108
Subject(s) - optical correlator , spatial light modulator , joint (building) , binary number , transformation (genetics) , interference (communication) , fourier transform , computer science , phase (matter) , noise (video) , filter (signal processing) , artificial intelligence , spatial filter , computer vision , gaussian , optics , image (mathematics) , mathematics , physics , engineering , telecommunications , architectural engineering , biochemistry , chemistry , channel (broadcasting) , arithmetic , quantum mechanics , gene , mathematical analysis
A joint transform hybrid optical correlator as applied to binary phase only filtering for pattern recognition is proposed. The interference fringes of the joint Fourier transformation, due to the reference and the input targets, are captured by a CCD camera feeding into a microcomputer for binarization. A binarized phase only filter, in principle, can be written onto a spatial light modulator (SLM). By simple coherent illumination of SLM, correlation operation of the reference and the input targets can be obtained. A computer simulation for the target embedded in an additive Gaussian noise is provided.