The real 3D stereoscopic display system is based on the light field scanning, which is realized by reconstructing the spatial distribution of object light intensity and reducing information redundancy. The entire system is designed with a high-speed projector, a directional scattering mirror, a circular stainless steel carrying disk, a rotating shaft and a micro electric motor. In this paper, the feasibility of developing the display system is discussed in detail by analyzing the principle of 3D display of light field, and the working principle of the system, and the system architecture, and the principle of stereo imaging. The experiment proves that the projection rate of the image matches the rotating circle of the rotating mirror and the rotating speed of the motor, which can be generated a stable 3D image. The accuracy of the image depends on the angle and quantity of the selected pictures. The smaller the angle of the selected pictures, the more number of pictures, and the more realistic 3D image will be presented.
This paper presents a hierarchical approach for human eye tracking. The tracking process is accomplished in three steps: head outline tracking, head pose recovery and eye localization. First, active particle filtering is presented to track a head outline. Compared with the traditional particle filtering, the active particle filtering improves the efficiency of every particle and accordingly reduces the number of required particles. In order to recover the head pose, only one view of the head is used to build the shape/texture template including multiple head features, and then the method "combination of views" (Ullman 1996) is applied to model changes of shapes and textures of the head features during head rotation. Based on the result of head pose recovery, the eyes can be localized efficiently in a restricted search space. The algorithm successfully tracks eyes of human heads that undergo translation, scaling and wide-range rotation in the office scene. The non-optimized implementation runs at about 3 frames per second on Pentium III 450MHz PC.