3-D Mesh Morphing By Newton Der

Overview Volume vs. Mesh Morphing Algorithm Applications

Volume Morphing Voxel: the cubic unit of volume Volumetric data set: a collection of voxels Independent of topology of model Generate in-between volumes with an interpolation function:

Mesh Morphing Triangle: polygonal surface formed by three vertices Mesh: a collection of triangles Interpolate in-between meshes Typically done based on user-selected feature points Dependent on topology of model

Multiresolution Meshes Reduce overhead by view-dependent resolution Maintain model at different levels of detail Varying detail in different parts of model

Mesh Morphing Algorithm Specify pairs of feature points between source mesh S and target mesh T

Multiresolution Adaptive Parameterization of Surfaces Use MAPS to construct base domains Sb and Tb

Multiresolution Adaptive Parameterization of Surfaces Mesh simplification Remove vertices and retriangulate edges

Correspondence Maps Compute correspondence maps: IIs : S  Sb IIT : T  Tb Mb : IIs  IIT M = IIT-1 Mb IIs

Morph the Meshes Metamesh: an in-between mesh that combines triangles from source and target

Applications Motion picture special effects Facial animation Distorting facial features

References Multiresolution Mesh Morphing Aaron Lee, David Dobkin, Wim Sweldens, Peter Schröder. Proceedings of SIGGRAPH 99. pp. 343-350, 1999. MAPS: Multiresolution Adaptive Parameterization of Surfaces Aaron W. F. Lee, Wim Sweldens, Peter Schröder, Lawrence Cowsar, David Dobkin. Proceedings of SIGGRAPH 98. pp. 95-104, 1998. Multiresolution Interpolation Meshes Takashi Michikawa, Takashi Kanai, Masahiro Fujita, Hiroaki Chiyokura. Proc. 9th Pacific Graphics International Conference (Pacific Graphics 2001), pp.60-69, IEEE CS Press, Los Alamitos, CA, October 2001.