Fingerprint fingertip orientation detection method and device

Details Fingerprint fingertip orientation detection method and device Fingerprint fingertip orientation detection method and device

1996-04-04

1998-12-08

Boudreau, Leo H.

Image analysis

Applications

Personnel identification

382125, G06K 900

Patent

active

058481761

ABSTRACT:
The present invention has the object of accurately detecting fingerprint fingertip orientation by a process of calculating inner products of ridge directions in the peripheral areas of an inputted fingerprint and radial line directions, finding an inner product sequence in which the inner products are sequenced upon making one revolution from a certain initial point, finding sequence errors between the inner product sequence and a plurality of inner product sequence patterns of differing fingertip orientations for a standard fingerprint, and establishing the fingertip orientation of the inputted fingerprint as the fingertip orientation of the standard fingerprint having the minimum sequence error.

REFERENCES:
patent: 4135147 (1979-01-01), Riganati et al.
patent: 4310827 (1982-01-01), Asai
patent: 4747147 (1988-05-01), Sparrow
patent: 5497429 (1996-03-01), Shibuya
patent: 5524161 (1996-06-01), Omori et al.
patent: 5608811 (1997-03-01), Kamei
patent: 5668453 (1997-09-01), Muto et al.
Gaffney, Jr., "Pattern Orientation Scheme", IBM Technical Disclosure Bulletin, vol. 9, No. 6, (1966), p. 633.
Shelman et al., "Fingerprint Research at Argonne National Laboratory", Proc. 1973 Carnahan Conf. On Electronic Crime Countermeasusures, 25 Apr. 1973, pp. 108-113.
Sparrow, "Topological Coordinate Systems: Application in Latent Mark Matching and Image Retrival", 1986 Int. Conf. Carnahan on Security Technology, 12 Aug. 1986, pp. 235-243.

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