Apparatus for fingerprint indexing and searching

Details Apparatus for fingerprint indexing and searching Apparatus for fingerprint indexing and searching

1997-12-30

1998-12-01

Boudreau, Leo H.

Image analysis

Applications

Personnel identification

707 6, G06K 900

Patent

active

058450050

ABSTRACT:
An apparatus for indexing and searching a plurality of reference fingerprints to determine if a sample fingerprint matches one of the reference fingerprints includes a device for: determining respective index values for the reference fingerprints and the sample fingerprint based upon characteristics of the fingerprints and with the index values being generally evenly distributed and continuous over a relatively large population of individuals; selecting a first subset of the reference fingerprints having index values in a first range relative to the index value of the sample fingerprint; and comparing the sample fingerprint to each fingerprint of the first subset of reference fingerprints to thereby determine if there is a match between the sample fingerprint and one of the reference fingerprints and without comparing the sample fingerprint to all of the reference fingerprints. The device for determining index values for the reference fingerprints and the sample fingerprint preferably includes a device for determining same based upon ridge flow curvature of the fingerprints. The device for selecting the first subset of reference fingerprints preferably includes a device for selecting same based upon an expected confidence value for locating the sample fingerprint in the first subset.

REFERENCES:
patent: 5465303 (1995-11-01), Levison et al.

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