Application of hough transform in eye tracking and targeting

Using the eye-gaze distinguishing and tracking method based on the image processing technique, Hough Transform for detecting circle-center is used to obtain the pupil center's position and to determine the eye-gaze direction, and then horizontal angle and vertical angle of the eyeball rotation is deduced, finally, the tracking of eye-gaze direction is realized. If eye tracking technology has been used for HMD and the range of observation objectives and target may expand, and the fighter jets' speed of response and attack can improve also.