Apparatus for determining ridge direction patterns

Details Apparatus for determining ridge direction patterns Apparatus for determining ridge direction patterns

1995-05-31

1998-02-10

Boudreau, Leo

Image analysis

Pattern recognition

Feature extraction

382125, 382201, 382199, 382266, G06K 946, G06K 900, G06K 940, G06K 948

Patent

active

057177864

ABSTRACT:
From an image memory of a fingerprint picture, gradient vectors of the picture are calculated. And from distribution of gradient vectors in a subregion, ridge direction of the subregion are determined, and confidence of the determined direction is also defined.

REFERENCES:
patent: 4047154 (1977-09-01), Vitols et al.
patent: 4896363 (1990-01-01), Taylor et al.
patent: 5140642 (1992-08-01), Hsu et al.
patent: 5164992 (1992-11-01), Turk et al.
patent: 5189708 (1993-02-01), Cox et al.
patent: 5233670 (1993-08-01), Dufour et al.
patent: 5259040 (1993-11-01), Hanna
patent: 5426708 (1995-06-01), Hamada et al.
patent: 5483462 (1996-01-01), Chiang
patent: 5497429 (1996-03-01), Shibuya
patent: 5519785 (1996-05-01), Hara
patent: 5524161 (1996-06-01), Omoni et al.

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