基于球面调和变换的三维模型检索  

3D Model Retrieval Based on Spherical Harmonics

作　　者：胡斌[1] 费耀平[1] 李敏[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410075

出　　处：《小型微型计算机系统》2009年第1期130-134,共5页Journal of Chinese Computer Systems

摘　　要：利用三维模型网格的空间几何特征定义了4种球面函数,从不同角度描述了三维模型.对这4种球面函数进行球面调和变换,在此基础上构建了4种特征描述符.针对单一球面函数的特征表达能力有限的问题,提出了基于多个球面函数的特征描述符.实验结果表明,本文提出的特征描述符具有较好的三维模型检索性能,其中基于全部4种球面函数的特征描述符的检索性能要优于其他基于球面调和变换的特征描述符.In this paper,four spherical functions based on 3D model geometry features was defined,each spherical function describe 3D model from a certain point of view. Then,spherical harmonic transform was used on these functions and the energy of the coeffi-cients of spherical harmonics was used to form four 3D feature descriptors. For the discrimination power of feature descriptors based on single spherical function was limited, feature descriptors based on multiple spherical functions was proposed. The experimental results indicate that the feature descriptors proposed in this paper have pretty good retrieval performance, especially the feature desc-riptor based on all four spherical functions performs better than some other feature descriptors based on spherical harmonics.

关 键 词：三维模型检索 球面调和变换 球面函数 特征描述符 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]