Patent ID: 7809160
Filing Date: 2010-10-05
Classification: A61B,G06F,G06K,G06T

Abstract:
1. A method for determining a subject's point of gaze, comprising: providing an imaging device for acquiring images of at least one of a subject's eyes; providing one or more markers associated with a surface, object, or objects in a visual scene for producing one or more corresponding glints or reflections in the subject's eyes; analyzing the images to find glints that are within a threshold distance of the pupil center; identifying, from the glints that are within a threshold distance of the pupil center, a glint that is closest to the pupil center; and identifying the marker corresponding to the glint that is closest to the pupil center; wherein the one or more markers are off an optical axis of the imaging device; and wherein the identified marker is indicative of the subject's point of gaze at the surface, object, or objects in the visual scene.