| US 7,486,806 B2 | ||
| Iris encoding method, individual authentication method, iris code registration device, iris authentication device, and iris authentication program | ||
| Takeo Azuma, Nara (Japan); Kenji Kondo, Kyoto (Japan); and Masahiro Wakamori, Kanagawa (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/495,739 PCT Filed Sep. 12, 2003, PCT No. PCT/JP03/11681 § 371(c)(1), (2), (4) Date May 17, 2004, PCT Pub. No. WO2004/025565, PCT Pub. Date Mar. 25, 2004. |
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| Claims priority of application No. 2002-268569 (JP), filed on Sep. 13, 2002. | ||
| Prior Publication US 2005/0008200 A1, Jan. 13, 2005 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—117 [359/857; 340/5.82] | 12 Claims |
| 1. An iris code generation method, comprising
a processor to perform the steps of:
inputting a plurality of images;
detecting iris regions from the plurality of images;
transforming coordinate system from a rectangular coordinate system to a polar coordinate system for an image of each of the
detected iris regions;
performing band limitation on each of the coordinate-transformed images;
generating an iris code from each of the band-limited images;
rotationally compensating each of the generated iris codes in a circumferential direction; and
synthesizing the rotationally-compensated iris codes into a single iris code by determining a bit value of each bit based
on a majority rule that selects a bit value of the single iris code based on a majority occurrence of bit values in the iris
codes.
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