Communications: electrical – Digital comparator systems
Patent
1980-05-22
1982-11-23
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
350162SF, 3401463AQ, G06K 920
Patent
active
043607993
ABSTRACT:
An improved apparatus and method of pattern recognition and of providing pattern recognition data, which possesses the advantages of optical power spectral analysis and digital image processing. An optical read-only memory means such as a photographic transparency is sampled at a plurality of sampling locations with a beam of coherent light. After passage through the transparency, the beam is directed either to a first channel including a transform lens and a wedge-ring detector or to a second channel including an imaging lens and a photodetector array. The improved pattern recognition data is the spatial frequency data provided by the wedge-ring detector and the spatial intensity data provided by the array detector. Hierarchal pattern recognition decisions are made using the two types of data during processing operations to provide improved pattern recognition results.
REFERENCES:
patent: 3074634 (1963-01-01), Gamo
patent: 3274380 (1966-09-01), Moskowitz
patent: 3274549 (1966-09-01), Moskowitz
patent: 3519992 (1970-07-01), Rau
patent: 3689772 (1972-09-01), George et al.
patent: 3748644 (1973-07-01), Tisdale
patent: 3771124 (1973-11-01), McMahon
patent: 3823261 (1974-07-01), Bolsey
patent: 3944978 (1976-03-01), Jensen et al.
patent: 3947833 (1976-03-01), Eckstein, Jr.
patent: 3984671 (1976-10-01), Fletcher et al.
patent: 4135147 (1979-01-01), Riganati et al.
patent: 4151512 (1979-04-01), Riganati et al.
patent: 4213036 (1980-07-01), Kopp et al.
patent: 4225850 (1980-09-01), Chang et al.
McMahon et al., "A Hybrid Optical Comp. Processing Technique for Fingerprint ID.", IEEE Trans. on Computers, vol. C-24, No. 4, Apr., 1975, pp. 358-369.
Leighty Robert D.
Lukes George E.
Boudreau Leo H.
Hollis Darrell E.
LandOfFree
Hybrid optical-digital pattern recognition apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hybrid optical-digital pattern recognition apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid optical-digital pattern recognition apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1881205