Optical character reader

Details Optical character reader Optical character reader

1988-10-27

1991-08-06

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 57, 382 61, G06K 900

Patent

active

050383914

ABSTRACT:
An optical character reader comprises a scanner including an image sensor and a binary encoding circuit for converting an output analog signal from the image sensor into a binary signal, a character recognizing means for recognizing each character in a range of view of the image sensor and outputting positional information and a result of recognition, a field selecting means for selecting and outputting a perfect field which is perfectly contained in the range of view of the image sensor on the basis of the positional information and the result of recognition, a format check means for judging whether the perfect field is in accord with a predetermined format or not, and an output judging means for outputting the perfect field being in accord with the predetermined format.

REFERENCES:
patent: 4797940 (1989-01-01), Sato et al.
I.B.M. Technical Disclosure Bulletin, vol. 26, No. 9, Feb. 1984 by Aden et al, pp. 4718-4719.

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