Eigen deformation of 3D models
Eigen deformation of 3D models
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DOI：
10.1007/s00371-012-0705-0
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
T. Dey;Pawas Ranjan;Yusu Wang
中科院分区：
文献类型：
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作者：
T. Dey;Pawas Ranjan;Yusu Wang
网格变形的最新进展主要由两种技术主导：一种是使用像笼子一样的中间结构，将用户想要的移动传递到网格，另一种是让用户直接将移动传递到网格。前者允许用户实时变形模型，并使用复杂的技术（如绿色坐标）保持形状。另一方面，直接技术将用户从创建适当的笼的负担中解放出来，尽管它们需要更多的计算时间来解决更大的非线性优化。理想的是开发一种无笼技术，在尊重局部几何形状的同时提供实时变形。使用一个简单的本征框架，我们设计这样的技术。我们的框架会自动创建一个隐式骨架。用户只需以简单直观的方式指定运动，我们的算法计算出的变形质量与基于绿色坐标的笼式方案相似。
Recent advances in mesh deformations have been dominated by two techniques: one uses an intermediate structure like a cage which transfers the user intended moves to the mesh, the other lets the user to impart the moves to the mesh directly. The former one lets the user deform the model in real-time and also preserve the shape with sophisticated techniques like Green Coordinates. The direct techniques on the other hand free the user from the burden of creating an appropriate cage though they take more computing time to solve larger non-linear optimizations. It would be ideal to develop a cage-free technique that provides real-time deformation while respecting the local geometry. Using a simple eigen-framework, we devise such a technique. Our framework creates animplicitskeleton automatically. The user only specifies the motion in a simple and intuitive manner, and our algorithm computes a deformation whose quality is similar to that of the cage-based scheme with Green Coordinates.