Overview of Geometry Compression of 3D Models
三维面模型的几何压缩技术综述

With the rapid development of computer technology and its applications, the size and the complexity of 3D models increase dramatically. This brings difficulties to store and transport 3D models over networks with limited bandwith. Thus,it is necessary to develop bit efficient representations and transmitting efficient representations for 3D models. Compression of 3D models consists of geometry compression and connectivity compression. In general, the geometry portion of the content always dominates the compressed code so that many methods have been presented for efficient coding of geometric data to achieve high compression efficiency. To open the present state of this field before eve ryone,the paper gives a survey on these works, it firstly introduces the basic pipeline for geometry compression and several principles for classifying geometry compression methods, and then divides the methods into two categories to discuss in details, the basic methods and the methods based on model transformation. Finally, the conclusion and prospect are presented by our understanding of geometry compression.