Character recognition apparatus

Details Character recognition apparatus Character recognition apparatus

1990-02-08

1990-12-04

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 30, G06K 968

Patent

active

049759744

ABSTRACT:
A character recognition apparatus, for use with an input character pattern and a dictionary of stored character patterns that are blocked into categories, all the patterns having a quantifiable format, in which a judging circuit performs a comparison of the patterns based on the quantifiable format and determines whether the quantified difference exceeds a threshold value in order to determine whether the input and stored character patterns match. The threshold is reduced, as lower mismatch quantities are found for a given character, and when a comparison exceeds the threshold, thereby indicating a mismatch, a new stored character is examined. As among all stored characters that have passed the threshold test, the one with the lowest mismatch quantity is selected as the recognized character.

REFERENCES:
patent: 3492646 (1970-01-01), Bene et al.
patent: 3717848 (1973-02-01), Irvin et al.
patent: 3868636 (1975-02-01), Schlang
patent: 4630308 (1986-12-01), Hongo
patent: 4700401 (1987-10-01), Masatsugu et al.

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