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Apparatus and method for OCR character and confidence determination using multiple OCR devices

  • US 5,805,747 A
  • Filed: 01/13/1997
  • Issued: 09/08/1998
  • Est. Priority Date: 10/04/1994
  • Status: Expired due to Term
First Claim
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1. A character recognition (CR) system for recognizing characters within a digital page image, comprising:

  • an input interface connected to receive said digital page image;

    a plurality of CR devices, each connected to receive said digital page image from said input interface, each of said CR devices converting a portion of said digital page image into output data signals indicating a character at said portion wherein the characters indicated in said output data signals constitute one or more candidate characters for said portion; and

    a voting unit coupled to receive said output data signals from each of said plurality of CR devices, said voting unit assigning an attribute for each indicated character as a function of the indicated character and the CR device indicating said indicated character,wherein, for each candidate character, said voting unit keeps a running tally of attributes for those of said plurality of CR devices which indicate said candidate character to arrive at a final tally, representing a composite attribute for said candidate character, when attributes for all of said plurality of CR devices which indicate said candidate character are accounted for in said running tally, andwherein said voting unit selects a recognized character from one of the candidate characters based on the composite attributes of the candidate characters and produces a combined data signal representing said recognized character.

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