Pupil detection device and iris authentication apparatus

Details Pupil detection device and iris authentication apparatus Pupil detection device and iris authentication apparatus

2008-03-25

2008-03-25

Hasan, M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S206000

Reexamination Certificate

active

07347547

ABSTRACT:
Pupil candidate detection unit for detecting positions of pupil candidates in an eye image; and luminance difference calculation unit for obtaining a difference between a maximum value and a minimum value of an image data of an eye image on a circumference of a circle having a center at center coordinates of a pupil candidate and a predetermined radius are provided, and when the output of luminance difference calculation unit is larger than the predetermined threshold, the corresponding pupil candidate is determined not to be the pupil.

REFERENCES:
patent: 2006/0291702 (2006-12-01), Miessbacher
patent: 06-138373 (1994-05-01), None
patent: 2001-167252 (2001-06-01), None
patent: 2002-119477 (2002-04-01), None
patent: 2003-317102 (2003-11-01), None
patent: 2004-021406 (2004-01-01), None
patent: WO 94/09446 (1994-04-01), None
Japanese Search Report for PCT/JP2005/009046, dated Jul. 19, 2005 and English translation of Form PCT/ISA/210.

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