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METHOD FOR RECOGNIZING CHARACTERS

  • US 3,755,780 A
  • Filed: 06/28/1971
  • Issued: 08/28/1973
  • Est. Priority Date: 06/28/1971
  • Status: Expired due to Term
First Claim
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1. A method to be practiced on a machine for identifying a character on a document as being one of a pre-determined set comprising the steps of:

  • 1. using apparatus to scan said document in the area of the charac-ter to generate electrical signals corresponding to the image of the character on the document, 2. using apparatus responsive to the electrical signals generated in step (1) to generate a sequence of signals composed of two different signal types, saId sequence corresponding to a binary raster representation of said character, 3. using apparatus to convert said binary raster representation to a set of numbers representative of respective features of said binary raster representation, 4. using apparatus to perform a plurality of tests on said set of numbers, each of said tests serving to discriminate between a respective pair of characters in said predetermined set for determining if one of the characters of the pair is more likely to be the character to be identified than the other character of the pair, and 5. using apparatus to identify the character in accordance with the results of the pairwise tests performed in step (4).

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