使用形状变化描述三维模型  

Shape variation representation of 3D shape descriptors

作　　者：朱新懿[1] 耿国华[1] 

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《计算机应用研究》2015年第3期922-924,953,共4页Application Research of Computers

基　　金：国家自然科学基金面上项目(61172170);西北大学科学研究基金资助项目(12NW03);西北大学博士科研启动基金资助项目(PR12277)

摘　　要：针对三维模型检索中的形状特征提取问题,提出利用三维模型自身形状变化信息构造形状特征描述符的方法。首先选择一组等间距互相平行的平面切割三维模型,得到三维模型的切片集合;然后定义相邻切片的差来描述切片间的形状变化,并通过所有相邻切片间的差值来反映三维模型自身的形状变化,以此作为三维模型的形状特征描述符。该方法与三维模型的旋转、平移无关,同时不依赖于模型的点云分布,并且精简模型三角面片对算法的影响较小。实验结果验证了该方法的有效性。This paper proposed a shape descriptor, self-difference shape descriptor（SDSD） to describe the shape of a 3D mod- el. The prinlary motivation of this approach was to construct the shape descriptor by using the shape variation of 3D model it- self. First it selected a set of parallel planes with equal interval to cut the model. For each plane, the set of intersection points was called a slice. The difference of two neighboring slices would reflect local shape variation of the model. Then it defined SDSD as a vector, whose component depicted the difference. This method meets rotating and translation invariance. Further- more, it is independent on the distribution of point cloud and robust to triangular reduction. Experimental results demonstrate the ability of the proposed descriptor to retrieve 3D models.

关 键 词：三维模型检索 形状描述符 形状特征 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]