Development of an active gaze tracking system in unrestricted posture

In this paper we describe an active gaze-tracking system that can provide an interactive interface with computer by using PTZ cameras. We propose an active tracking architecture for real-time gaze-tracking in an open environment and recorded the data into the database for diagnosis. When the cursor is out of control by gazing, a technical improvement theory is used to account for the reflective action of psychological natural reaction to correct the relevant process automatically. This architecture consists of four following parts: face tracking module, eye tracking module, active control module and input control module. We present a high accuracy gaze tracking system which can dynamically estimate the better target position of four PTZ and map the gazing point to screen coordinates. A user can use the active gaze-tracking system without difficult calibration and restricted posture.