Detecting iris orientation
US9710707B1 · kind B1 · utility
7Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2015 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Dec 31, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/74
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for determining a roll angle in an eye image is described. A center of an iris, an inner eye corner, and an outer eye corner in an eye image may be determined. The eye image may be normalized and transformed to a polar eye image using the center of the iris as a reference for the transformation. A shift associated with the inner eye corner and a shift associated with the outer eye corner may be determined. The shifts associated with the inner eye corner and the outer eye corner may be indicators of an orientation of the eye image or roll angle, and may be used for subsequent eye image processing and matching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.