US 12,367,608 B2
Determination of gaze direction
Torsten Wilhelm, Gothenburg (SE)
Assigned to Smart Eye AB, Gothenburg (SE)
Appl. No. 17/640,437
Filed by Smart Eye AB, Gothenburg (SE)
PCT Filed Sep. 3, 2020, PCT No. PCT/EP2020/074655
§ 371(c)(1), (2) Date Mar. 4, 2022,
PCT Pub. No. WO2021/043931, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 19195512 (EP), filed on Sep. 5, 2019.
Prior Publication US 2022/0335648 A1, Oct. 20, 2022
Int. Cl. G06V 40/16 (2022.01); G06T 7/73 (2017.01); G06V 10/30 (2022.01); G06V 40/18 (2022.01)
CPC G06T 7/74 (2017.01) [G06V 40/166 (2022.01); G06V 40/193 (2022.01); G06T 2207/30201 (2013.01); G06V 10/30 (2022.01)] 14 Claims
OG exemplary drawing
 
1. A method for estimating a gaze direction of a user, comprising:
acquiring an image of a face of the user,
determining a current head pose based on the image of the face of the user, accessing a database storing a population-based relationship between head pose and gaze direction and determining an approximate gaze direction based on said current head pose and said relationship,
identifying a set of eye features in said image, and determining an estimated gaze direction based on said eye features,
identifying a set of eye features and a glint in an eye in said image, and determining a precise gaze direction based on said glint position and said eye features, and
combining said approximate gaze direction and at least one of said estimated gaze direction and said precise gaze direction to provide a corrected gaze direction.