Optical character recognition apparatus

Details Optical character recognition apparatus Optical character recognition apparatus

1982-09-24

1985-04-16

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

G06K 934

Patent

active

045120323

ABSTRACT:
An optical character recognition apparatus recognizes characters by comparing with the standard patterns the quantization patterns of the characters obtained by scanning a typewritten document by a photo-electric converter. The projection patterns of the quantization patterns of one line onto the horizontal line are obtained. The distances between the centers of two characters, with two other characters interposed therebetween, are calculated. The printing pitch is discriminated by discriminating if the distance between the centers of these characters is within a predetermined range.

REFERENCES:
patent: 3219974 (1965-11-01), Rabinow
patent: 4292622 (1981-09-01), Henrichon, Jr.
patent: 4365234 (1982-12-01), Henrichon, Jr.
patent: 4377803 (1983-03-01), Lotspiech et al.

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