Binary signal producing apparatus for optical character recognit

Details Binary signal producing apparatus for optical character recognit Binary signal producing apparatus for optical character recognit

1987-11-12

1989-05-16

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 27, 382 50, G06K 938

Patent

active

048316580

ABSTRACT:
An optical character reader distinguishes between black and white image signals by comparing a center reader with readings from surrounding areas. Variations on the surface of a paper bearing the image can add or subtract values so that the comparison may be in error. The invention overcomes the problem by using logic circuits to add, subtract and compare signals out of a mask in order to improve the accuracy of the comparison between the center reading and the readings from the surrounding areas.

REFERENCES:
patent: 3267293 (1966-08-01), Hinds
patent: 3872434 (1975-03-01), Duvall et al.
patent: 4408343 (1983-10-01), Neill et al.
patent: 4449240 (1984-05-01), Yoshida
patent: 4468704 (1984-08-01), Stoffel et al.
patent: 4586082 (1986-04-01), Wilkinson
patent: 4601056 (1986-07-01), Habitzreiter et al.
patent: 4675909 (1987-06-01), Egami et al.
Gagnon et al., "General Purpose Scan/Digitizing Method", IBM Tech. Disc. Bulletin, vol. 21, No. 9, Feb. 1979, pp. 3673-3674.

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