×

Biometric recognition using a classification neural network

  • US 5,892,838 A
  • Filed: 06/11/1996
  • Issued: 04/06/1999
  • Est. Priority Date: 06/11/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A biometric recognition system for authenticating biometric indicia of a user, the system comprising:

  • data storage means for storing a plurality of master pattern sets, each master pattern set corresponding one of a plurality of authorized users, each of the master pattern sets defined by a plurality of master features and master orientation data of the plurality of master features;

    vector generation means for producing a comparison vector representing the level of similarity between a master pattern set and the biometric indicia; and

    a neural network for producing classification designators based on the comparison vector, wherein the classification designators are indicative of whether the user'"'"'s biometric indicia should be authenticated;

    wherein the vector generation means comprises;

    identification means for identifying sample features in the biometric indicia that best match each of the master features;

    pattern generation means for generating sample orientation data based on the sample features that best match each of the master features; and

    means for comparing the master orientation data and the sample orientation data to produce comparison orientation data;

    wherein the comparison vector is based on the comparison orientation data and is also based on the similarity of the master features and their corresponding sample features; and

    the master pattern sets are derived using the following equation;

    ##EQU5## where S is the set of all m-by-m features in an image, with the exception of R, which is a reference feature;

    Rij is an (i, j)th pixel gray level in feature R;

    Iij i s an (i, j)th pixel gray level in I; and

    R and I are mean gray levels within the respective features.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×