High speed character matcher and method

Details High speed character matcher and method High speed character matcher and method

1979-08-24

1981-09-08

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

3401463MA, G06K 968

Patent

active

042887828

ABSTRACT:
A high speed character matcher and method for measuring the similarity between a pair of binary patterns representing two-dimensional images. The patterns are compared on a bit by bit basis and when a discrepancy is detected, it is assigned an error penalty which is based on the two-dimensional context in which the error occurred. The types of error context which are typical in the comparison of distorted but otherwise similar characters are given a lower error than those typically encountered in the comparison of dissimilar characters.

REFERENCES:
patent: 3339179 (1967-08-01), Shelton, Jr. et al.
patent: 3341814 (1967-09-01), Chow
patent: 3576534 (1971-04-01), Steinberger
patent: 3706071 (1972-12-01), Gray
patent: 3905018 (1975-09-01), Gray
patent: 4153897 (1979-05-01), Yasuda et al.
patent: 4200861 (1980-04-01), Hubach et al.
Widrow, "The Rubber-Mask Technique-I. Pattern Measurement and Analysis" Pattern Recognition, 1973, vol. 5, pp. 175-197, Pergamon Press.
Widrow, "The Rubber-Mask Technique-II. Pattern Storage and Recognition" Pattern Recognition, 1973, vol. 5, pp. 199-211, Pergamon Press.

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