Optical character recognition apparatus

Details Optical character recognition apparatus Optical character recognition apparatus

1987-03-17

1988-05-24

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 51, G06K 936

Patent

active

047471492

ABSTRACT:
The disclosure describes a character recognition apparatus comprising a scanner for optically scanning a prescribed area and outputting a scanned signal, a binary processing circuit for receiving the scanned signal and producing a plurality of binary signals, a counting mechanism for counting black meshes in the scanned area, a counting mechanism for counting insulated meshes, a mechanism for calculating the ratio of the number of black meshes and the number of insulated meshes, and a mechanism for selecting one optimum binary signal from the plurality of binary signals on the basis of a comparison of the ratios.

REFERENCES:
patent: 3466603 (1969-09-01), Shelton
patent: 4254400 (1981-03-01), Yoda et al.
patent: 4601057 (1986-07-01), Tsuji et al.

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