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ABSTRACT
In this paper we present a general framework for performing constrained mesh deformation tasks with gradient domain techniques. We present a gradient domain technique that works well with a wide variety of linear and nonlinear constraints. The constraints we introduce include the nonlinear volume constraint for volume preservation, the nonlinear skeleton constraint for maintaining the rigidity of limb segments of articulated figures, and the projection constraint for easy manipulation of the mesh without having to frequently switch between multiple viewpoints. To handle nonlinear constraints, we cast mesh deformation as a nonlinear energy minimization problem and solve the problem using an iterative algorithm. The main challenges in solving this nonlinear problem are the slow convergence and numerical instability of the iterative solver. To address these issues, we develop a subspace technique that builds a coarse control mesh around the original mesh and projects the deformation energy and constraints onto the control mesh vertices using the mean value interpolation. The energy minimization is then carried out in the subspace formed by the control mesh vertices. Running in this subspace, our energy minimization solver is both fast and stable and it provides interactive responses. We demonstrate our deformation constraints and subspace deformation technique with a variety of constrained deformation examples.
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Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.
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CITED BY 31
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Mario Botsch , Mark Pauly , Leif Kobbelt , Pierre Alliez , Bruno Lévy , Stephan Bischoff , Christian Rössl, Geometric modeling based on polygonal meshes Video files associated with this course are available from the citation page, ACM SIGGRAPH 2007 courses, August 05-09, 2007, San Diego, California
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Michael Wand , Bart Adams , Maksim Ovsjanikov , Alexander Berner , Martin Bokeloh , Philipp Jenke , Leonidas Guibas , Hans-Peter Seidel , Andreas Schilling, Efficient reconstruction of nonrigid shape and motion from real-time 3D scanner data, ACM Transactions on Graphics (TOG), v.28 n.2, p.1-15, April 2009
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Weiwei Xu , Jun Wang , KangKang Yin , Kun Zhou , Michiel van de Panne , Falai Chen , Baining Guo, Joint-aware manipulation of deformable models, ACM Transactions on Graphics (TOG), v.28 n.3, August 2009
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