US 9,813,597 B2
Gaze tracker and method for tracking gaze thereof
Seon A Kim, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR)
Filed on Nov. 18, 2015, as Appl. No. 14/945,114.
Claims priority of application No. 10-2015-0133308 (KR), filed on Sep. 21, 2015.
Prior Publication US 2017/0083746 A1, Mar. 23, 2017
Int. Cl. G06K 9/00 (2006.01); H04N 5/225 (2006.01); A61B 3/113 (2006.01); A61B 3/14 (2006.01); A61B 3/00 (2006.01); A61B 5/18 (2006.01); H04N 13/02 (2006.01); A61B 3/15 (2006.01)
CPC H04N 5/2256 (2013.01) [A61B 3/0025 (2013.01); A61B 3/113 (2013.01); A61B 3/14 (2013.01); A61B 3/154 (2013.01); A61B 5/18 (2013.01); G06K 9/00604 (2013.01); H04N 5/2258 (2013.01); H04N 13/0239 (2013.01); G06K 9/00845 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gaze tracker comprising:
an image acquirer configured to acquire eye images of a user using at least two cameras and at least two lightings; and
a processor configured to calculate a gaze to detect a lighting reflection point from each of the eye images and to extract a cornea central point, the processor configured to detect a pupil central point from each of the eye images and calculate a gaze vector using the cornea central point and the pupil central point,
wherein, when at least two lighting reflection points are detected from each of the eye images, the processor is configured to calculate vectors for connection between each lighting and the lighting reflection point corresponding thereto and to detect an intersection point between the calculated vectors as the cornea central point, and when only one lighting reflection point is detected from one or more eye images among the eye images, the processor is configured to extract the cornea central point using distance information between a pre-stored lighting reflection point and the cornea central point and the one lighting reflection point.