Patent · US Active

Method and device for detecting a shadow in a head mounted device

US11556006B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

Tobii AB · SE

Inventors

Yimu Wang · Danderyd, SE
Ylva Björk · Danderyd, SE
Joakim Zachrisson · Danderyd, SE
Pravin Kumar Rana · Danderyd, SE

Key dates

Filing date	Oct 28, 2019
Grant date	Jan 17, 2023
Priority date	—
Expiry date	Oct 28, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/014
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Disclosed is a method for detecting a shadow in an image of an eye region of a user wearing a Head Mounted Device, HMD. The method comprises obtaining, from a camera of the HMD, an image of the eye region of the user wearing a HMD and determining an area of interest in the image, the area of interest comprising a plurality of subareas. The method further comprises determining a first brightness level for a first subarea of the plurality of subareas and determining a second brightness level for a second subarea of the plurality of subareas. The method further comprises comparing the first brightness level with the second brightness level, and, based on the comparing, selectively generating a signal indicating a shadow.

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