A GENERAL MOTION REPRESENTATION - Exploring the Intrinsic Viewpoint of a Motion

Gutemberg Guerra-Filho

Abstract

We propose a novel motion representation, named General Motion Representation (GMR), which explicitly contains the absolute world coordinates of the meaningful joints, while still specifying every other joint with rotational data relative to their respective parent joints. More specifically, our representation supports multiple roots where any joint can be a root due to the use of a novel pre-rotation format for the construction of local transformation matrices. Hence, our general motion representation allows for all intermediate data structures between fully rotational and fully translational data. The use of multiple roots also implies the representation of partial motion considering a subset of joints. We introduce the general motion representation to consider multiple roots with the support of three operations (shift root, split skeleton tree, and join skeleton trees). These operations allow reduced skeletal complexity because of the application of pre-rotation local transformation matrices which eliminates the requirement for dummy joints. We also present procedures to convert from raw marker data or post-rotation formats. We demonstrate the highly efficient computation of per-frame joint positions and orientations. Our experimental results show that GMR outperforms traditional motion formats in both speed and flexibility. At the full translational configuration, GMR is around seven times faster than bvh.

References

  1. Brostow, G., Essa, I., Steedly, D., Kwatra, V., 2004. Novel skeletal representation for articulated creatures. Lecture Notes in Computer Science, vol. 3023, pp. 66-78.
  2. Coleman, P., Bibliowicz, J., Singh, K., Gleicher, M., 2008. Staggered poses: A character motion representation for detail-preserving editing of pose and coordinated timing. In Symposium on Computer Animation, pp. 137-146.
  3. Kulpa, R., Multon, F., Arnaldi, B., 2005. Morphologyindependent representation of motions for interactive human-like animation. Computer Graphics Forum, vol. 24, pp. 343-351.
  4. Magnenat-Thalmann, N., Thalmann, D., 1991. Complex models for animating synthetic actors. IEEE Computer Graphics and Applications, vol. 11, no. 5, pp. 32-44.
  5. Scheepers, F., Parent, R., Carlson, E., May, S., 1997. Anatomy-based modeling of the human musculature. In Annual Conference on Computer Graphics and Interactive Techniques, pp. 163-172.
Download


Paper Citation


in Harvard Style

Guerra-Filho G. (2012). A GENERAL MOTION REPRESENTATION - Exploring the Intrinsic Viewpoint of a Motion . In Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2012) ISBN 978-989-8565-02-0, pages 347-352. DOI: 10.5220/0003855303470352


in Bibtex Style

@conference{grapp12,
author={Gutemberg Guerra-Filho},
title={A GENERAL MOTION REPRESENTATION - Exploring the Intrinsic Viewpoint of a Motion},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2012)},
year={2012},
pages={347-352},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003855303470352},
isbn={978-989-8565-02-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2012)
TI - A GENERAL MOTION REPRESENTATION - Exploring the Intrinsic Viewpoint of a Motion
SN - 978-989-8565-02-0
AU - Guerra-Filho G.
PY - 2012
SP - 347
EP - 352
DO - 10.5220/0003855303470352