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Fixation Points Estimation Based on Binocular Stereo Vision

This paper proposes a method of fixation points estimation combining the two-dimension mapping model with three-dimension stereo vision. The purpose of our study is to design an easy-to-use non-contact gaze tracking system under natural light. The method of two-dimension mapping is easy to achieve, however, it needs the user to keep the head being fixed. It could achieve higher estimation accuracy though it is still not easy for users to use the algorithm. To solve this problem, we have introduced the binocular cameras to calculate the pose of head and then add the related result into the result of 2D mapping to compensate the movement of head. The average error angles of gaze estimation in the case head fixed and head moving are 5.1°and 8.5°, respectively. This proposed method is easy to achieve and the experiment device is easy to mounted.