Method for recognizing previously localized characters present i

Details Method for recognizing previously localized characters present i Method for recognizing previously localized characters present i

1990-05-09

1991-12-17

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 22, 382 14, G06K 900, G06K 948

Patent

active

050739557

ABSTRACT:
A method for recognizing previously localized characters present in digital gray tone images, particularly for recognizing characters struck in metal surfaces, whereby, for training a trainable character recognition routine, steps are provided to generate reference characters presented line-like and to deposit these reference characters in a working memory of the trainable character recognition routine, whereby the number and nature of the reference characters correspond to the character set from which characters are to be recognized. For recognizing characters, steps are provided: to read the digitized character of the localized character to be recognized into a character recognition routine and an appertaining gray tone image is provided, to pre-process the character to be recognized so that a classification of the appertaining character can be implemented; to compare the preprocessed character to all reference characters previously learned by the character recognition routine, to implement a majority decision for identifying that reference character that has the greatest plurality of sub-features coinciding with the character to be recognized, and to produce a result signal from the character recognition routine for further processing thereof.

REFERENCES:
patent: 3609685 (1971-09-01), Deutsch
patent: 4566124 (1986-01-01), Yamamoto et al.
patent: 4817184 (1989-03-01), Thomason et al.
"Thinning Algorithms", Chapter 9, in Algorithms for Graphics & Image Processing, Springer 1982, pp. 195-215.
"Forward/Backward Contour Tracing with Feedback", by Bor-Dong Chen & Pepe Siy, IEEE PAMI-9, May 1987, pp. 438-446.
"Picture Analysis in Character Recognition in Digital Picture Analysis" by J. R. Ullmann, edited by A. Rosenfeld, Springer, 1976, pp. 295-343.
"Stamped Character Apparatus Based on the Bit Matrix Method" by Y. Hongo & A. Komuro, Proc. 6th ICPR, Muenchen 1982, pp. 448-450.
"Font and Size-Invariant Character Recognition with Gray Value Image Features": by S. Holder & J. Dengler, Proc. 9th ICPR, Rom, 1988, pp. 252-254.

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