A novel gaze tracking approach based on Purkinje image

The imaging principle of Purkinje image, the change of its position with the eye moves are analyzed, and the position of Purkinje image shifts linearly with the rotation-angle of eyeball is proposed. Based on this, a novel approach to non-intrusive gaze tracking, which only must locate the Purkinje image that has evident edge and prominent grey-scale in the captured eye-image to get the line of sight of a person, is proposed. The experiment validates its high speed and high accurate in gaze tracking, and thus can simplify the gaze tracking system.