Extended depth-of-field biometric system
US9495590B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2015 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Apr 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20056
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An iris recognition system may include an optical system having an intentional amount of spherical aberration that results in an extended depth of field. A raw image of an iris captured by the optical system may be normalized. In some embodiments, the normalized raw image may be processed to enhance the MTF of the normalized iris image. An iris code may be generated from the normalized raw image or the enhanced normalized raw image. The iris code may be compared to known iris codes to determine if there is a match. In some embodiments, the iris code generated by the normalized iris image may be processed with equalization function before comparison with the known iris codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.