Fingerprint input device equipped with a cleaner for finger-impr

Details Fingerprint input device equipped with a cleaner for finger-impr Fingerprint input device equipped with a cleaner for finger-impr

1985-07-18

1987-10-20

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 4, 382 5, 350582, 350584, 15246, 15 97R, G06K 900, G06K 926

Patent

active

047019590

ABSTRACT:
A fingerprint input device for reading images of a fingerprint from a surface of a finger includes a base plate, an optical scanner, a rotary member, a first cleaning member, a switch, a detector and a control member. The optical member scans the finger-impressing surface to read the fingerprint. The rotary member has a first portion and a second, window portion. The first cleaning member is provided at the bottom of the first portion of the rotary member for wiping the finger-impressing surface by rotation thereof. The switch means is operated when the fingerprint input device is to be utilized, and the detector is operative for detecting release of the finger from the finger-impressing surface. The controller is responsive to outputs of the switch and the detector for controlling rotation of the rotary member to both expose the finger-impressing surface and to clean and cover same.

REFERENCES:
patent: 2745131 (1956-05-01), Auwarter
patent: 3677623 (1972-07-01), Hall
patent: 4074217 (1978-02-01), Yanagawa
patent: 4202120 (1980-05-01), Engel
patent: 4210899 (1980-07-01), Swonger
patent: 4310827 (1982-01-01), Asai
patent: 4568178 (1986-02-01), Rios
patent: 4641350 (1987-02-01), Bunn

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