Abstract
Traditional gaze tracking systems rely on explicit infrared lights and high resolution cameras to achieve high performance and robustness. These systems, however, require complex setup and thus are restricted in lab research and hard to apply in practice. In this paper, we propose to perform gaze tracking with a consumer level depth sensor (Kinect). Leveraging on Kinect's capability to obtain 3D coordinates, we propose an efficient model-based gaze tracking system. We first build a unified 3D eye model to relate gaze directions and eye features (pupil center, eyeball center, cornea center) through subject-dependent eye parameters. A personal calibration framework is further proposed to estimate the subject-dependent eye parameters. Finally we can perform real time gaze tracking given the 3D coordinates of eye features from Kinect and the subject-dependent eye parameters from personal calibration procedure. Experimental results with 6 subjects prove the effectiveness of the proposed 3D eye model and the personal calibration framework. Furthermore, the gaze tracking system is able to work in real time (20 fps) and with low resolution eye images.
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