Character recognition apparatus using edge images

Details Character recognition apparatus using edge images Character recognition apparatus using edge images

1995-06-05

1998-08-04

Boudreau, Leo

Image analysis

Pattern recognition

Feature extraction

382197, G06K 948, G06K 956

Patent

active

057907013

ABSTRACT:
A character recognition apparatus comprises a photoelectric conversion section that converts image information including the characters to be recognized into multi-valued image information according to image density, an edge extracting circuit that creates edge image information indicating the outline of image density on the basis of the multi-valued image information from the photoelectric conversion section, and a recognition circuit that computes a distribution of a direction component so as to create a feature vector and recognizes characters on the basis of the direction feature vector.

REFERENCES:
patent: 4903313 (1990-02-01), Tachikawa
patent: 4908872 (1990-03-01), Toriu et al.
patent: 4977603 (1990-12-01), Irie et al.
patent: 5033099 (1991-07-01), Yamada et al.

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