Pose Correction by Space-Time Integration
Martinez Esturo, J. and Rössl, C. and Fröhlich, S. and Botsch, M. and Theisel, H.
The deformation of a given model into different poses is an
important problem in computer graphics and computer animation. In a typical
workflow, a carefully designed reference surface is deformed into a couple of
poses, which can then act as a basis for interpolating arbitrarily intermediate
poses. To this end the input poses should be free of geometric artifacts like
self-intersections, since these degeneracies will be reproduced or even
amplified by the interpolation. Not only are the resulting artifacts visually
disturbing, they typically cause severe numerical problems for further
In this paper we present an automatic approach for removing these geometric artifacts from a given set of mesh poses, while maintaining the original mesh connectivity. The deformation from the rest pose to a target pose is faithfully reproduced by integration of a smooth space-time vector field, which by construction guarantees the absence of self-intersections in the repaired target pose. Our approach is computationally efficient, and its effectiveness is demonstrated on a range of typical animation examples.