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Pattern selecting device capable of selecting favorable candidate patterns

  • US 4,956,870 A
  • Filed: 11/28/1989
  • Issued: 09/11/1990
  • Est. Priority Date: 11/29/1988
  • Status: Expired due to Term
First Claim
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1. A pattern selecting device for producing an output numeral indicative of one of first through N-th candidate patterns which have first through N-th candidate degrees of similarity relative to an input pattern and are decided by a pattern collating system for collating said input pattern with a plurality of registered patterns to produce, successively in a descending order of said first through said N-th candidate degrees, first through N-th candidate pattern signals representative of said first through said N-th candidate patterns, where N represents an integer which is not less than two and is not greater than said plurality, said pattern selecting device comprising:

  • processing means for processing said first through said N-th candidate pattern signals to produce, when an (n+1)-th candidate pattern signal is processed, where n is variable from 1 towards N, an n-th processed signal related to said (n+1)-th through said N-th candidate degrees;

    estimating means connected to said processing means for estimating an n-th estimated degree for an n-th candidate pattern with reference to said processed signal to produce an estimated signal representative of said n-th estimated degree; and

    deciding means connected to said processing means and said estimating means for deciding whether or not a ratio of said n-th estimated degree to said n-th candidate degree is not smaller than a predetermined value, said deciding means thereby producing a numeral indicative of said n-th candidate pattern as said output numeral.

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