US 11,675,428 B2
Determining a gaze direction using depth information
Oscar Danielsson, Danderyd (SE); and Daniel Johansson Torneus, Danderyd (SE)
Assigned to Tobii AB, Danderyd (SE)
Appl. No. 17/43,532
Filed by Tobii AB, Danderyd (SE)
PCT Filed Mar. 29, 2018, PCT No. PCT/EP2018/058171
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2019/185150, PCT Pub. Date Oct. 3, 2019.
Prior Publication US 2022/0129067 A1, Apr. 28, 2022
Int. Cl. G06F 3/01 (2006.01); G06T 7/593 (2017.01); G06V 40/19 (2022.01)
CPC G06F 3/013 (2013.01) [G06T 7/593 (2017.01); G06V 40/19 (2022.01)] 16 Claims
OG exemplary drawing
 
1. A system for determining a gaze direction of a user viewing a scene, the system comprising:
a camera for obtaining an image of at least one of the user's eyes;
a depth information detection device for obtaining depth data related to the image;
a processing unit configured to:
define a surface at a predetermined position relative to the user's eye based on the depth data;
obtain a normalized image by projecting the image onto the surface;
determine a normalized gaze direction based on the normalized image;
determine a gaze direction based on the normalized gaze direction and the depth data.