Poisson-Based Weight Reduction of Animated Meshes

While animation using barycentric coordinates or other automatic weight assignment methods has become a popular method for shape deformation, the global nature of the weights limits their use for real‐time applications. We present a method that reduces the number of control points influencing a vert...

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Veröffentlicht in:Computer graphics forum Jg. 29; H. 6; S. 1945 - 1954
Hauptverfasser: Landreneau, Eric, Schaefer, Scott
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Blackwell Publishing Ltd 01.09.2010
Schlagworte:
Animated
Animation
barycentric coordinates
Computer graphics
Computer Graphics [I.3.5]: Computational Geometry and Object Modelling-Geometric Algorithms
Deformation
Finite element method
Geometry
Mathematical models
Methods
Optimization
Poisson distribution
Real time
skeletal deformation
skin weights
Studies
Weight limits
Weight reduction
ISSN:0167-7055, 1467-8659
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Zusammenfassung:While animation using barycentric coordinates or other automatic weight assignment methods has become a popular method for shape deformation, the global nature of the weights limits their use for real‐time applications. We present a method that reduces the number of control points influencing a vertex to a user‐specified number such that the deformations created by the reduced weight set resemble that of the original deformation. To do so we show how to set up a Poisson minimization problem to solve for a reduced weight set and illustrate its advantages over other weight reduction methods. Not only does weight reduction lower the amount of storage space necessary to deform these models but also allows GPU acceleration of the resulting deformations. Our experiments show that we can achieve a factor of 100 increase in speed over CPU deformations using the full weight set, which makes real‐time deformations of large models possible.
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2010.01661.x