Method for automatic fingerprint classification

Details Method for automatic fingerprint classification Method for automatic fingerprint classification

1997-06-30

1999-11-30

Kelley, Christopher S.

Image analysis

Applications

Personnel identification

382125, G06K 900

Patent

active

059956429

ABSTRACT:
A method for automatic fingerprint classification is dependent on the number of core points and the ridge flow direction around the core points. The speed of the classification process is improved by pre-processing the fingerprint image to identify the background blocks and the fingerprint blocks, so that the process only deal with the fingerprint blocks. A block directional image is constructed for the fingerprint blocks. The block directional image is then used to determine the core point(s) of the fingerprint. Based on the number of core point and the trend of the ridge direction around each core point, fingerprints can be classified into 8 classes based on a set of predetermined rules.

REFERENCES:
patent: 4156230 (1979-05-01), Riganati et al.
patent: 5105467 (1992-04-01), Kim et al.
patent: 5140642 (1992-08-01), Hsu et al.
patent: 5465303 (1995-11-01), Levison et al.
patent: 5497429 (1996-03-01), Shibuya
patent: 5729334 (1998-03-01), Van Ruyven

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