Hardware calibration of eye tracker
US9147248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | May 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/19
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A gaze tracking device is calibrated to a display unit by presenting graphical guide objects on an active area thereof, which designate distinctive features reflecting how the device may be positioned n a first side of a frame of the display unit. User commands move the objects on the display's active area in a first direction parallel to the first side of the frame. A position value designating an actual position for the gaze tracking device on the first side of the frame is assigned based on a current position of the graphical guide objects on the active area. An offset value is calculated based on the assigned position value and a known measure of the active area. The offset value represents a distance in the first direction between a well-defined point of the gaze tracking device and a well-defined point of the first side. Width and height measures reflecting a physical extension of the active area are also determined and stored in response to a user input confirmation command together with the offset value, so that the values can be used when determining a user's gaze point on the active area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.