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Character recognition system using the generalized hough transformation and method

  • US 5,220,621 A
  • Filed: 07/31/1991
  • Issued: 06/15/1993
  • Est. Priority Date: 08/01/1990
  • Status: Expired due to Term
First Claim
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1. A character recognition system comprising:

  • means for storing a template table for each of a plurality of basic character patterns, which includes parameters extracted at edge points of an image of the basic character pattern used for the generalized Hough transform;

    means for detecting an image of an object including a character to be recognized;

    means for detecting edge points of the image of said object;

    means for accessing, based upon data specifying a selected template table and said detected edge points, parameters from said selected template table, which are used for the generalized Hough transform of said detected edge points;

    means for performing the generalized Hough transform based upon said accessed parameters and coordinates of said detected edge points;

    means for recording cumulative values for the coordinates generated by said transform; and

    means for judging from said recorded cumulative values whether or not the image of said object includes the character corresponding to said selected template table.

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