Locating characters for character recognition

Details Locating characters for character recognition Locating characters for character recognition

1991-09-06

1993-11-30

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 48, G06K 934

Patent

active

052673251

ABSTRACT:
Characters are located in a character recognition system by providing images in response to scanning characters, and then smearing black pixels in an image in up and down and left and right directions for detecting corners which are used to produce candidate character frames. These candidate character frames are scored based on how well they correspond to character size and expected location to determine which character frames are to be submitted for character recognition.

REFERENCES:
patent: 4926490 (1990-05-01), Mano
patent: 5033104 (1991-07-01), Amano
patent: 5038381 (1991-08-01), Nelson
patent: 5048100 (1991-09-01), Kuperstein
patent: 5054091 (1991-10-01), Tanaka et al.
patent: 5144682 (1992-09-01), Nakamura
Wong et al., "Document Analysis System", IBM Journal of Research and Development, vol. 26, No. 6, Nov. 1982, pp. 647-651.

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