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.