Iris-based biometric identification
US7336806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/193
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes forming a feature vector associated with an iris of an individual using a transform operation including converting an iris image into a log-polar image, scaling one or more samples in the log-polar image according to a Fourier-Mellin transform, and performing a Fourier transform on the scaled samples. The method involves forming an iris digest based on the feature vector, and creating a biometric identifier based on the iris digest. A system includes an iris scanner, an iris analyzer that forms an image of a human iris wherein the presence of eyelashes in the image is minimized, forms a feature vector associated with the iris image using a modified Fourier-Mellin transform, and compresses the feature vector into an iris digest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.