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Character recognition with variable subdivisions of a character region

  • US 4,903,312 A
  • Filed: 09/06/1988
  • Issued: 02/20/1990
  • Est. Priority Date: 05/19/1986
  • Status: Expired due to Term
First Claim
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1. A character recognizing method, comprising the steps of:

  • optically reading an input character to be recognized to form a binary character image including at least one character line comprised of black pixels;

    broadening said character line in accordance with a predetermined manner;

    assigning a plurality of first features, different from one another, to each of pixels defining a contour of said binary character image depending on a local pattern of arrangement of black and white pixels along said contour;

    counting said first features assigned to said character image;

    subdiving said character image into a plurality of mesh sub-regions based on the count of said assigned first features;

    extracting a second feature from each of said sub-regions to define a collection of extracted second features; and

    identifying said input character by comparing said collection of extracted second features with each of a plurality of stored collections of second features for known characters and selecting one of said known characters, having a highest degree of similarity.

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