Eye position detection method and device
US7130453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Aug 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/197
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The position of an eye is detectable with high precision from a face image of a person taken under near infrared illumination or the like. After pre-processing, the face image is subjected to brightness correction to increase the contrast between the sclera portion and iris portion of the eye. Brightness gradient vectors are calculated for the brightness-corrected image, and matching is performed between a brightness gradient image generated using the calculated brightness gradient vectors and an eye template. Further, matching with a pupil template is performed to correct the eye center position. Final positions of both eyes are then determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.