Acquisition of eye images in the gaze tracker based on depth sensor and zoom camera

We designed and developed a gaze tracking device to provide comfortability in gaze tracking and freedom of head movement of a user to be applicable to the large display environment with a long Z distance. We also propose the method of stereo calibration and pixel mapping between the wide-angle camera and the depth sensor, and the method of PTZ calibration between the wide-angle camera and the zoom camera to make the device continuously and effectively track and capture the eye image even though a user´s irregular movements in 3D space.