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Optical Correlator With Complex Holographic FilterExperimental real-time optical correlator includes complex-valued holographic filter computed from one of two input scenes. Made more tolerant of errors in patterns to be recognized. Filter function essentially coded hologram computed by Burchhardt's method, in which complex value of each pixel of fast Fourier transform of image represented by three real, nonnegative numbers. In generating optical correlator according to method, phasor of each pixel in Fourier transform represented by intensities in three adjacent pixels.
Document ID
19920000588
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Chao, Tien-Hsin
(Caltech)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: NASA Tech Briefs
Volume: 16
Issue: 10
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
NPO-18464
Accession Number
92B10588
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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