Eye tracking systems
US7391887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2002 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Jul 19, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/73
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An eye tracking system includes an eye camera and a scene camera for supplying video data to interlace electronics indicative of an image of the user's eye and an image of the scene observed by the user. A frame grabber is provided for digitizing the video data and for separating the eye and scene data into two processing channels, and a spot location module determines the location of a reference spot formed on the user's eye. The module includes an adaptive threshold and spot identification sub-modules for indicating parts of the eye camera image which have higher brightness, and for selecting a valid reference spot. A pupil location module determines the user's line of gaze, and a display for indicating the user's point of regard from the user's line of gaze determined by the pupil and spot location modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.