Finger identification method and apparatus

Details Finger identification method and apparatus Finger identification method and apparatus

2005-11-02

2009-10-27

Mariam, Daniel G (Department: 2624)

Image analysis

Applications

Personnel identification

Reexamination Certificate

active

07609864

ABSTRACT:
An image pickup scheme capable of always providing an optimum quality of a blood vessel pattern, in image pickup of a blood vessel pattern of a finger using transmitted light, without being affected by a difference, if any, in an external environment. A personal identification apparatus includes light sources for irradiating light to be transmitted by a finger, an image pickup unit for picking up an image using light transmitted by the finger, finger detection unit for detecting that the finger exists in a predetermined position, finger region extraction unit for extracting a region occupied by the finger from an image picked up by the image pickup unit, and gain changing unit for changing an amplification factor of image pickup elements in the image pickup unit on the basis of a picture quality of a specific region within the extracted region.

REFERENCES:
patent: 6173068 (2001-01-01), Prokoski
patent: 6970234 (2005-11-01), Nagasaka et al.
patent: 7123755 (2006-10-01), Shigeta
patent: 7245745 (2007-07-01), Nagasaka et al.
patent: 2002/0048014 (2002-04-01), Kono et al.
patent: 2004/0184641 (2004-09-01), Nagasaka et al.
patent: 103 32 106 (2004-09-01), None
patent: WO 00/39744 (2000-07-01), None
Chinese Office Action in corresponding Chinese patent application No. 2005101186901, Sep. 19, 2008.

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