Binary encoding of gray scale nonlinear joint transform correlat

Details Binary encoding of gray scale nonlinear joint transform correlat Binary encoding of gray scale nonlinear joint transform correlat

1992-04-09

1998-09-29

Mancuso, Joseph

Image analysis

Pattern recognition

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382270, 382278, 359561, 364822, G06K 964

Patent

active

058155970

ABSTRACT:
A joint Fourier transform optical correlator is disclosed which can have varying degrees of nonlinearity and yet employ a readily available binary spatial light modulator for producing the correlation output light signal in conjunction with a Fourier transform lens. The nonlinearly transformed joint power spectrum is binarized utilizing a multiple level threshold function which can vary from one pixel to the next.

REFERENCES:
patent: 4832447 (1989-05-01), Javidi
patent: 4949389 (1990-08-01), Allebach et al.
patent: 5040140 (1991-08-01), Horner
patent: 5119443 (1992-06-01), Javidi et al.

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