Character recognition method for recognizing character in an arb

Details Character recognition method for recognizing character in an arb Character recognition method for recognizing character in an arb

1988-12-09

1991-07-09

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 9, 382 22, 382 23, 382 46, G06K 948

Patent

active

050312251

ABSTRACT:
A character recognition method includes reading a document having characters displayed thereon and entering a document data representative of the content of the document. Image data of one of the characters from the document data is extracted. The one character has an orientation rotated by an arbitrary rotation angle from a predefined reference position for the one character. A first feature quantity of the one character is extracted from the extracted image data. The extracted feature quantity is converted into a second feature quantity of the one character in the reference position based on the arbitrary rotation angle. A dictionary which contains stored feature quantities of a plurality of characters in the reference position is interrogated so as to find a primary candidate character which has a feature quantity matching or most closely resembling the converted feature quantity.

REFERENCES:
patent: 4015239 (1977-03-01), Fujimoto et al.
patent: 4903312 (1990-02-01), Sato
patent: 4929085 (1990-05-01), Kajihara

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