Minutiae pattern matcher

  • US 4,135,147 A
  • Filed: 09/10/1976
  • Issued: 01/16/1979
  • Est. Priority Date: 09/10/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. An automatic minutiae pattern matching system comprising:

  • means responsive to minutiae of first and second patterns for selectively generating a plurality of sets of neighborhood comparison signals representative of the closeness of match and coordinate and orientation displacements between minutiae neighborhoods of the first and second patterns, each set of neighborhood comparison signals comprising a match score and associated coordinate and orientation displacement signals respectively representative of the closeness of match and coordinate and orientation displacements between a minutiae neighborhood of the first minutiae pattern and a minutiae neighborhood of the second pattern; and

    means having a plurality of three-dimensional ranges of different displacements in a three-coordinate system for adding in each three-dimensional range all match scores whose associated sets of displacement signals represent displacements lying within that three-dimensional range in order to find the three-dimensional range having the highest combined match score, the highest combined match score being indicative of the relative closeness of match between the first and second patterns.

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