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Matcher

  • US 4,696,046 A
  • Filed: 03/27/1986
  • Issued: 09/22/1987
  • Est. Priority Date: 08/02/1985
  • Status: Expired due to Fees
First Claim
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1. A matcher improvement for matching a set of Search identification points against a set of File identification points employing a difference table, comprising:

  • first memory means for storing a set of Search identification points as a set of binary value signals,second memory means for storing a set of File identification points as a set of binary value signals,multiple comparator means, each of said comparator means being coupled to a predetermined subset of said Search identification points and to a corresponding predetermined subset of said File identification points, each of said multiple comparative means having;

    (i) differencing means to provide a first difference table and a first proximity value for each entry on said difference table,(ii) constant adjustament means to provide a difference plane translation of that entry in said difference table which has the highest proximity value to the origin of the difference plane represented by said difference table, all of the entries in said difference table being translated by the same amount,(iii) differential adjustment means to differentially adjust each entry in said difference table as a function of the distance between the Search point of the entry being adjusted and the Search point of the entry having the highest proximity value,(iv) means to provide a final set of proximity values based on the difference table provided by said constant and said differential adjustment means, and(v) means to provide at least one figure of merit based on said final set of proximity values for the Search subset involved, andmeans to combine said figures of merit from each of said subsets to provide at least one overall figure of merit indicating the degree of match between said set of Search points and said set of File points.

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