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Pattern data matching device for matching multiple sets of pattern data efficiently and its matching method

  • US 6,229,909 B1
  • Filed: 07/10/1998
  • Issued: 05/08/2001
  • Est. Priority Date: 07/11/1997
  • Status: Expired due to Fees
First Claim
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1. A pattern data matching device for matching target pattern data which are pattern data taken for verification against file pattern data which are pattern data prepared beforehand for verification, said pattern data having characteristic points, said device comprising:

  • a matching controller storing file pattern data and target pattern data to be verified;

    multiple target pattern data storing means for storing multiple sets of said target pattern data transferred from the matching controller, each set corresponding to a portion of characteristic point information in said target pattern;

    file pattern data storing means for storing said file pattern data transferred from the matching controller; and

    matching means for matching necessary sets of said target pattern data stored in said multiple target pattern data storing means against said file pattern data stored in said file pattern data storing means, said file pattern data having a designation information bit corresponding to each set, indicating whether or not each said target pattern data set is to be verified, for each said target pattern data set, said matching means verifying said target pattern data set against said file pattern data when said designation information indicates said target pattern data set is to be verified.

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