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Character recognition apparatus using modification of a characteristic quantity

  • US 5,625,710 A
  • Filed: 08/23/1994
  • Issued: 04/29/1997
  • Est. Priority Date: 07/20/1988
  • Status: Expired due to Term
First Claim
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1. A character recognition apparatus supplied with image data, comprising:

  • a dictionary memory for memorizing sets of characteristic quantity elements, each set corresponding to one of a plurality of characters; and

    a recognition processor includingcharacteristic quantity extracting means for extracting a set of characteristic quantity elements representing directional line segments extracted from a contour image of a character image included within the image data and varying with changes in dimensions of the character image;

    character search means for determining a character corresponding to the character image included within the image data by comparing the set of characteristic quantity elements extracted from the image data with the sets of characteristic quantity elements of the characters memorized in said dictionary memory; and

    characteristic quantity magnification/reduction means for modifying the set of characteristic quantity elements output from said characteristic quantity extracting means, by multiplying each element in the set of characteristic quantity elements by a scalar quantity to equalize the scale of the character image included within the image data with the scale of at least one of the characters for which the sets of characteristic quantity elements are memorized in said dictionary memory, before said character search means performs the comparing.

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