Experimental 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.
Optical Correlator With Complex Holographic Filter
NASA Tech Briefs ; 16 , 10
1992-10-01
Miscellaneous
No indication
English
Noncoherent correlator with reflective volume holographic filter [2969-93]
British Library Conference Proceedings | 1996
|Optical Matched Filter Image Correlator
NTIS | 1975
|Broadband matched filter processing with an optical correlator
British Library Conference Proceedings | 1993
|Fingerprint identification by use of a volume holographic optical correlator
British Library Conference Proceedings | 1999
|