Economical skin-pattern-acquisition and analysis apparatus for a

Details Economical skin-pattern-acquisition and analysis apparatus for a Economical skin-pattern-acquisition and analysis apparatus for a

1999-06-23

2000-09-05

Mehta, Bhavesh

Image analysis

Applications

Personnel identification

356 71, G06K 900

Patent

active

061154849

ABSTRACT:
Surface relief of a finger is read using an optical-fiber prism unit, with fiber terminations at one end to contact the surface, and at the other for light passages along fibers from the first. Light enters where NA<0.5 and fiber diameter is constant with longitudinal position. The device is in a 1.4-2 L case, with a battery or power unit, converter to form a corresponding data array for verifying, digital signal processor to do the verifying, and output to indicate or implement a decision. The optical fiber prism unit has a substantially circular cylindrical wall defining a longitudinal axis, fused optical fibers parallel to the longitudinal axis, a traverser face for output of a skin pattern image from the prism and a generally elliptical angled face for contacting such a skin pattern.

REFERENCES:
patent: 5426296 (1995-06-01), Shikai et al.
patent: 5684906 (1997-11-01), Sugawara
patent: 5764347 (1998-06-01), Podmaniczky et al.
patent: 5812252 (1998-09-01), Bowker et al.
patent: 5900993 (1999-05-01), Betensky

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