Image analysis – Histogram processing – For setting a threshold
Patent
1983-12-28
1986-05-13
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 34, 382 38, 382 39, G06K 970
Patent
active
045891427
ABSTRACT:
A method and apparatus of processing data is disclosed for recognizing unknown characters of a known character set based in part upon the frequency of occurrence of the characters. The method includes the steps of storing the image data of the unkown characters and then sequentially applying discrete sets of tests capable of first recognizing data and identifying characters having a higher frequency of occurrence. A second stage of discriminatory tests is sequentially applied to the unrecognized data for recognizing data and identifying characters having a lower frequency of occurrence than the first group of characters.
REFERENCES:
patent: 3601802 (1971-08-01), Nakagame et al.
patent: 3675203 (1972-07-01), Baumann
patent: 3755780 (1973-08-01), Sammon et al.
patent: 4153897 (1979-05-01), Yasuda et al.
patent: 4157532 (1979-06-01), Grunwald
patent: 4180799 (1979-12-01), Smith
Goddard et al., "Two-Level Character Recognition Logic", IBM Tech. Disc. Bulletin, vol. 22, No. 10, Mar. 1980, p. 4429.
IBM Technical Disclosure Bulletin, vol. 23, No. 8 Jan. 1981, pp. 3663-3664, "Two-Level Character Recognition".
Boudreau Leo H.
International Business Machines Corp. (IBM)
Mancuso Joseph
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