Depth image-based modeling of point cloud

This paper introduces at first GQS(General Quadric Surface) equation, then considers that utilizing depth images referenced to various datum planes to model point cloud. After getting reference datum, this paper proposing the methods of creating depth images from point cloud and the specific steps with reference to different datums. Finally we choose some point cloud data of ancient building components from laser scanning data of Forbidden City in China as experiment data, and develop a depth images modeling system. Experiment results demonstrate the stability and high precision of the method of plane, cylinder and sphere fitting as well as the validity of depth images to represent point cloud of object.