3D Eye Tracking

Eye tracking has been widely used in the area of the psychology, education and sports. The resulted gaze location and its distribution are useful to analyze user’s attention. Many methods have been proposed to visualize gaze pattern in both spatial and temporal changes. Recently, user’s location can be detected and tracked by using markers and location sensors devices. By combining glass-type eye tracker and those sensor devices, the gaze patterns can be visualized onto three-dimensional environment. However, both the current marker and sensor devices have a limitation in range. Moreover, these devices are not easy to implement to the eye tracker. In this study, we propose a position-tracking-enabled glass-type eye tracker with an embedded inertial measurement unit sensor. By putting two infrared LEDs on a targeted object, the eye tracker will automatically calculate its position and pose toward the targeted object. The tracker will be effective to be used at a classroom to measure gaze direction of a subject attending the class and to estimate the position or pose of the subject. Since the proposed eye tracker only required two infrared LEDs, putting those LEDs on the left and right upper corners of the screen will make the calculation easier because those LEDs can be captured by the eye tracker with less occlusion.