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Fingerprint identification system

  • US 4,641,350 A
  • Filed: 05/17/1984
  • Issued: 02/03/1987
  • Est. Priority Date: 05/17/1984
  • Status: Expired due to Fees
First Claim
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1. A machine method of comparing an M×

  • N data array to an X×

    Y data array, said arrays being representative of fingerprint patterns, comprising the steps of;

    A. dividing said X×

    Y array into a plurality of sub-arrays;

    B. comprising elements of a sub-array of said X×

    Y array with elements of said M×

    N array and generating a correlation value indicative of the degree of correlation existing between corresponding elements;

    C. repeating step B for a plurality of sub-arrays of elements of said M×

    N array;

    D. identifying a highest correlation value generated in step C;

    E. repeating steps B, C and D for each sub-array of said X×

    Y array;

    F. identifying a relative location of said sub-arrays corresponding to said highest correlation values to provide a measure of relative distortion of said fingerprint patterns; and

    G. comparing said highest correlation values and said measure of relative distortion to respective predetermined threshold values.

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