Tracking Eye Gaze under Coordinated Head Rotations with an Ordinary Camera

Previous efforts in eye gaze tracking either did not consider head motion, or considered the 6 DOF head motions with multiple cameras or light sources. In this paper, we show that it is possible to track eye gaze under naturally head rotations(Yaw and Pitch) with only an ordinary webcam. We first carry out a study to examine the occurrence of eye-head coordination, and then show how to track such coordinated gaze by deriving a linear coordination equation and developing a tracking system based on a single webcam. Besides the theoretical aspect, we develop a vision-based tracking framework that can achieve an acceptable tracking accuracy in our experiments for estimating such eye-head coordinated gaze.