Optical character reading system

Details Optical character reading system Optical character reading system

1980-06-05

1982-12-14

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

3401463MA, G06K 900

Patent

active

043640230

ABSTRACT:
An optical character reading system in which a sheet upon which characters or symbols are printed is illuminated and the characters scanned with a two-dimensional photoelectric sensor. Output signals from the sensors are processed to read the characters through right and left frame detecting circuits. The right and left frame detecting circuits detect white/black patterns of frames formed on the sensor when the left and right sides of the characters extend beyond the ends of the ranges of the sensor. A circuit combines the white/black patterns detected by the right and left frame detecting circuits to provide a recognition of the characters being scanned.

REFERENCES:
patent: 3531770 (1970-09-01), Mauch et al.
patent: 3613081 (1971-10-01), Morimoto
patent: 3651461 (1972-03-01), Holt
patent: 3786416 (1974-01-01), Bhimani
patent: 3921136 (1975-11-01), Bar-Lev
patent: 3970991 (1976-07-01), Kawada et al.
patent: 4104616 (1978-08-01), Isshiki et al.
patent: 4180800 (1979-12-01), Isshiki et al.

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