【摘要】 随着应用需求的增长,三维模型的规模和复杂度急剧增长,给模型的存储和在有限带宽的网络上传输带来了很大的困难。因此,研究空间需求小、适合于计算机网络传输的三维模型的表示方法具有十分重要的意义。三维模型的压缩主要包括拓扑压缩和几何压缩。由于压缩数据中的大部分是几何压缩数据,因此已发展了许多几何压缩方法,以提高模型的压缩效率。为使相关的学者和工程技术人员较好地了解几何压缩技术,本文对这方面的工作进行了较全面的介绍。本文首先介绍了几何压缩的基本流程及几种几何压缩方法的分类原则,然后将几何压缩技术分为基础压缩方法和经过模型变换的压缩方法两大类并分别进行详细的介绍,讨论了各个方法的特点.最后结合我们自身的工作认识对几何压缩技术进行小结和展望。更多还原

【Abstract】 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 ge- ometry portion of the content always dominates the compressed code so that many methods have been presented for effi- cient 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 pros- pect are presented by our understanding of geometry compression.更多还原