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Authors: Josef Kohout 1 ; Petr Kellnhofer 1 and Saulo Martelli 2

Affiliations: 1 University of West Bohemia, Czech Republic ; 2 Istituto Ortopedico Rizzoli, Italy

Keyword(s): Deformation, Laplacian, Volume Preservation, Muscle Modelling.

Related Ontology Subjects/Areas/Topics: Anthropometric Virtual Human Models ; Computer Vision, Visualization and Computer Graphics ; Geometry and Modeling ; Physics-Based Modeling ; Surface Modeling

Abstract: This paper proposes a gradient domain deformation for wrapping surface models of muscles around bones as they move during a simulation of physiological activities. Each muscle is associated with one or more poly-lines that represent the muscle skeleton to which the surface model of the muscle is bound so that transformation of the skeleton (caused by the movement of bones) produces transformation of the vertices of the mesh subject to Laplacian linear constraints to preserve the local shape of the mesh and non-linear volume constraints to preserve the volume of the mesh. All these constraints form a system of equations that is solved using the iterative Gauss-Newton method with Lagrange multipliers. Our C++ implementation can wrap a muscle of medium size in about a couple of ms up to 400 ms on commodity hardware depending on the type of parallelization, whilst it can keep the change in volume below 0.04%. A preliminary biomechanical assessment of the proposed technique suggests that it can produce realistic results and thanks to its rapid processing speed, it might be an attractive alternative to the methods that are used in clinical practise at present. (More)

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Paper citation in several formats:
Kohout, J.; Kellnhofer, P. and Martelli, S. (2012). FAST DEFORMATION FOR MODELLING OF MUSCULOSKELETAL SYSTEM. In Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications (VISIGRAPP 2012) - GRAPP; ISBN 978-989-8565-02-0; ISSN 2184-4321, SciTePress, pages 16-25. DOI: 10.5220/0003811100160025

@conference{grapp12,
author={Josef Kohout. and Petr Kellnhofer. and Saulo Martelli.},
title={FAST DEFORMATION FOR MODELLING OF MUSCULOSKELETAL SYSTEM},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications (VISIGRAPP 2012) - GRAPP},
year={2012},
pages={16-25},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003811100160025},
isbn={978-989-8565-02-0},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications (VISIGRAPP 2012) - GRAPP
TI - FAST DEFORMATION FOR MODELLING OF MUSCULOSKELETAL SYSTEM
SN - 978-989-8565-02-0
IS - 2184-4321
AU - Kohout, J.
AU - Kellnhofer, P.
AU - Martelli, S.
PY - 2012
SP - 16
EP - 25
DO - 10.5220/0003811100160025
PB - SciTePress

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