Patent ID: 9746918
Date: 2017-08-29
CPC Classifications: A61B,G06F,G06K,G06T

Claim:
1. An eye tracking method, comprising: acquiring a series of video frames comprising face images, using a video camera of a handheld portable computing device, in a first frame of the series of acquired frames, estimating an expected size and expected location of an image of an iris of an eye within said first frame; determining a first location of the iris image within said first frame by identifying a first region within the expected location, a size of the first region being consistent with said expected size, wherein a first sum luminance value of pixels of said first region is darker than a sum luminance value of pixels of other regions of the same size as the first region, within said expected location; determining a second location of the iris image within a second frame by identifying a second region within the expected location, a size of the second region being consistent with said expected size, wherein a second sum luminance value of pixels of said second region is darker than a sum luminance value of pixels of other regions of the same size as the second region, within said expected location; measuring change in location of the second identified region with respect to the location of the first identified region; and determining the movement of the iris based on the change in the measured location.