Image analysis – Image enhancement or restoration – Focus measuring or adjusting
Reexamination Certificate
2006-08-22
2006-08-22
Chawan, Sheela (Department: 2624)
Image analysis
Image enhancement or restoration
Focus measuring or adjusting
C382S117000, C382S291000, C351S208000, C348S078000
Reexamination Certificate
active
07095901
ABSTRACT:
The present invention relates to a method for adjusting a focus position in an iris recognition system, the method including the steps of: projecting a designated light for measuring a distance between the user and a camera; acquiring user images including the image projected by the light; and measuring a distance between the user and the camera by extracting the projected image by the light out of the user images and analyzing characteristics of the image. In addition, the present invention relates to an apparatus for adjusting a focus position in an iris recognition system, which enables to adjust the focal angle of an iris, the apparatus includes an illumination device; an iris recognition camera for acquiring user images having an iris image when the illumination device irradiates a light; an illuminator for helping the user with the focal angle according to sharpness of the visible ray that depends on the focal angle by transmitting a visible ray from the illuminator and by reflecting the user images.
REFERENCES:
patent: 5963366 (1999-10-01), Nakamura et al.
patent: 6526160 (2003-02-01), Ito
patent: 6594377 (2003-07-01), Kim et al.
patent: 6714665 (2004-03-01), Hanna et al.
patent: 10-268372 (1998-10-01), None
Chae Jang Jin
Lee Won Hee
Yang Ae Kyung
Chawan Sheela
Fleshner & Kim LLP.
LG Electronics Inc.
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