Patent · US Active

Calibration of an eye tracking system

US11568560B2 · kind B2 · utility

0Cited by

1References

17Claims

0Family size

Assignee

Tobii AB · SE

Inventors

Per Fogelström · Danderyd, SE
Anna Redz · Danderyd, SE
Anders Dahl · Danderyd, SE
Niklas Ollesson · Danderyd, SE

Key dates

Filing date	Apr 28, 2021
Grant date	Jan 31, 2023
Priority date	—
Expiry date	Apr 28, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30201
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

There is provided mechanisms for calibration of an eye tracking system. An eye tracking system comprises a pupil centre corneal reflection (PCCR) based eye tracker and a non-PCCR based eye tracker. A method comprises obtaining at least one first eye position of a subject by applying the PCCR based eye tracker on an image set depicting the subject. The method comprises calibrating a head model of the non-PCCR based eye tracker, as applied on the image set, for the subject using the obtained at least one first eye position from the PCCR based eye tracker as ground truth. The head model comprises facial features that include at least one second eye position. The calibrating involves positioning the head model in order for its at least one second eye position to be consistent with the at least one first eye position given by the PCCR based eye tracker.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.