Automatic Generation of Structure Preserving Multiresolution Models
Automatic Generation of Structure Preserving Multiresolution Models
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DOI：
10.1111/j.1467-8659.2005.00873.x
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发表时间：
2005-09
影响因子：
2.5
通讯作者：
Martin Marinov;L. Kobbelt
中科院分区：
文献类型：
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作者：
Martin Marinov;L. Kobbelt
我们提出了一种多分辨率表示，它使用细分曲面作为光滑的基面，高分辨率网格是由正常位移dened。虽然这个基本表示非常简单，但我们的实际贡献在于自动生成这样的表示。给定一个高分辨率的网格，我们的算法被设计为获得一个细分控制网格，其结构是适当的调整和对齐的主要几何特征。这意味着细分曲面的控制顶点不仅控制全局平滑变形，而且这些变形在它们的支持和形状对应于输入网格的特征结构的意义上是有意义的。这是通过对一般多边形网格（不仅仅是三角形）使用新的抽取方案来实现的，该方案基于面合并而不是边折叠。基于面的积分度量使得抽取方案非常鲁棒，使得我们可以获得非常粗糙的控制网格，这反过来又允许具有大支持的变形。
We are proposing a multiresolution representation which uses a subdivision surface as a smooth base surface with respect to which a high resolution mesh is dened by normal displacement. While this basic representation is quite straightforward, our actual contribution lies in the automatic generation of such a representation. Given a high resolution mesh, our algorithm is designed to derive a subdivision control mesh whose structure is properly adjusted and aligned to the major geometric features. This implies that the control vertices of the subdivision surface not only control globally smooth deformations but in addition that these deformations are meaningful in the sense that their support and shape correspond to the characteristic structure of the input mesh. This is achieved by using a new decimation scheme for general polygonal meshes (not just triangles) that is based on face merging instead of edge collapsing. A face-based integral metric makes the decimation scheme very robust such that we can obtain extremely coarse control meshes which in turn allow for deformations with large support.