Iris encoding method, individual authentication method, iris code registration device, iris authentication device, and iris authentication program
US7486806B2 · kind B2 · utility
36Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Aug 10, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In iris authentication, iris regions are extracted from a plurality of images (2a, 2b). The extracted iris regions are subjected to polar coordinate transformation (3a, 3b) and band limitation (4a, 4b). Thereafter, an iris code is generated from the coordinate-transformed, band-limited iris regions (5a, 5b). The iris code is subjected to rotational compensation (6a, 6b). A plurality of resultant iris codes are synthesized into a single iris code by determining the bit value of each bit based on a majority rule (7a, 7b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.