Efficient Interpolation of Articulated Shapes Using Mixed Shape Spaces
Article first published online: 9 SEP 2013
© 2013 The Authors Computer Graphics Forum © 2013 The Eurographics Association and John Wiley & Sons Ltd.
Computer Graphics Forum
Volume 32, Issue 8, pages 258–270, December 2013
How to Cite
Marras, S., Cashman, T. J. and Hormann, K. (2013), Efficient Interpolation of Articulated Shapes Using Mixed Shape Spaces. Computer Graphics Forum, 32: 258–270. doi: 10.1111/cgf.12202
- Issue published online: 27 NOV 2013
- Article first published online: 9 SEP 2013
- SNF. Grant Number: 200021-134639
- computational geometry;
- digital geometry processing;
- shape blending/morphing;
- I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling—Hierarchy and geometric transformations
Interpolation between compatible triangle meshes that represent different poses of some object is a fundamental operation in geometry processing. A common approach is to consider the static input shapes as points in a suitable shape space and then use simple linear interpolation in this space to find an interpolated shape. In this paper, we present a new interpolation technique that is particularly tailored for meshes that represent articulated shapes. It is up to an order of magnitude faster than state-of-the-art methods and gives very similar results. To achieve this, our approach introduces a novel shape space that takes advantage of the underlying structure of articulated shapes and distinguishes between rigid parts and non-rigid joints. This allows us to use fast vertex interpolation on the rigid parts and resort to comparatively slow edge-based interpolation only for the joints.