Image analysis – Histogram processing – For setting a threshold
Patent
1982-12-27
1986-02-25
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
35016213, 350376, G06K 976
Patent
active
045731985
ABSTRACT:
A pattern recognition and optical image processing system employing dynamically alterable magneto-optic display assemblies operating as light modulators. A first pattern is digitized and used to drive a first magneto-optic display assembly disposed in a light beam. The pattern impressed upon the light beam is sensed at the Fourier plane and digitized as a representation of the spatial filter pattern of the first pattern. A second pattern is digitized. The digitized second pattern and the digitized spatial filter pattern of the first pattern are used to drive a pair of magneto-optic display assemblies disposed in a single light beam. The resultant correlation pattern is sensed and the degree of correlation match between the Fourier transform of one pattern and the spatial filter pattern of the other pattern is used as indication of the probability of a pattern match between the first and second patterns.
REFERENCES:
patent: 3634695 (1970-02-01), Barringer
patent: 3965299 (1976-06-01), Lin
Craig et al., "Bubble Domain Electronic to Optical Image Transducer", IBM Tech. Disclosure Bulletin, vol. 13, No. 1 6/70.
Winzer et al., "Improved Holographic Matched Filter Systems for Pattern Recognition using a Correlation Method", Optics and Laser Technology Oct. 1972, vol. 4, No. 5.
Boudreau Leo H.
Litton Systems Inc.
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