Image analysis – Histogram processing – For setting a threshold
Patent
1983-09-29
1986-09-09
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 37, G06K 936
Patent
active
046113460
ABSTRACT:
A method and apparatus of processing data is disclosed for recognizing unknown characters of a known character set, some of the characters having diacritical marks. The method includes the steps of storing the image data of an unknown character which may contain a diacritical mark. From the stored image data a predetermined localized area of data is extracted that corresponds to the expected location of the diacritical mark. The extracted diacritical mark image data and at least a portion of the stored image data of the unknown character are examined to recognize the character and any diacritical mark associated therewith. Also disclosed are video preprocessing techniques for segmenting the characters using profiles thereof, inclusive-bit-coding to separate characters based upon differences in size, justification of the extracted diacritical mark image data, unique encoding of the recognition results, and post-processing verification for characters including diacritical marks.
REFERENCES:
patent: 3638188 (1972-01-01), Pincoffs et al.
patent: 3710321 (1973-01-01), Rubenstein
patent: 4206442 (1980-06-01), Miyazaki et al.
patent: 4527283 (1985-07-01), Ito et al.
Bednar Gregory M.
Fryer George B.
Narasimha Manthri S.
Boudreau Leo H.
International Business Machines - Corporation
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