使用形状变化描述三维模型

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。...

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Bibliographic Details
Published in计算机应用研究 Vol. 32; no. 3; pp. 922 - 924
Main Author 朱新懿 耿国华
Format Journal Article
LanguageChinese
Published 西北大学信息科学与技术学院,西安,710127 2015
Subjects
三维模型检索
形状描述符
形状特征
shape descriptor
形状描述符
形状特征
3D model retrieval
三维模型检索
shape feature
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ISSN1001-3695
DOI10.3969/j.issn.1001-3695.2015.03.065

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Summary: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。
Bibliography:51-1196/TP
3D model retrieval; shape descriptor; shape feature
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.
ZHU Xin-yi, GENG Guo-hua （ School of Information Science ＆ Technology, Northwest University, Xi＇ an 710127, China ）
ISSN:1001-3695
DOI:10.3969/j.issn.1001-3695.2015.03.065