Patent ID: 9323989
Filing Date: 2016-04-26
CPC Classification: G06K

Claim Text:
1. A tracking device, comprising: an image information acquiring circuit to acquire image information for successive frames; and a tracker to generate a plurality of sub images from the acquired image information, each of the sub images smaller than each of the frames of the acquired image information, the tracker to calculate likelihoods that each of the sub images includes two eyes of the subject and to decide locations of the two eyes based on at least one of the sub images having a predetermined likelihood value, wherein the tracker is to decide locations of the sub images based on locations decided for a previous frame of image information acquired before a current frame, calculate likelihoods of candidate coordinates of the two eyes of the subject based on the sub images, generate a model having parameters including a distance between the two eyes, a width of one eye, and an angle that a straight line linking the two eyes forms with a horizontal line, calculate center coordinates of right and left eyes from an information of the model and decide the locations of the eyes, wherein an X coordinate of a candidate center coordinate of the right eye is calculated by adding −(L cos θ)/2 to an X coordinate of a center point between the right and left eyes and an Y coordinate of the candidate center coordinate of the right eye is calculated by adding (L cos θ)/2 to an Y coordinate of the center point, where L is the distance and θ is the angle.