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In this paper, an eye tracking method and an automatic focusing technique, which combine the regulation of the aperture with the adjustment of the focus of the camera lens, are proposed to acquire clear eye images in the eye-gaze tracking system. Firstly, the aperture of the CCD lens is controlled to adapt the system to external lighting circumstances with the average brightness value of the processed...
To capture eye images with good quality in the eye gaze tracking system, a strategy to track and aim at the eye is proposed, and an automatic method, which combines the regulation of the aperture with the adjustment of the focus of the camera lens, is developed. Firstly, the geometrical positions of LEDs, camera, cornea and glints are analyzed. The image's average brightness value is utilized to control...
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