Biomechanical Modelling from 3D Motion Capture Data
Partially supported by Pourtugese FCT grant MODI-PTDC/EEA ACR/72201/2006.
In collaboration with João Fayad and Pedro Aguiar.
Problem Statement:
The problem is to extract an accurate 3D model of the human body given the 3D position of a set of markers lying over the body of the subject. We aim to develop an approach which requires minimal user interaction. For instance, no a priori segmentation of the points belonging to each body part should be provided. Also we assume that the user does not know the type and position of the joints. Thus the approach should be able to infer automatically these components.
The project has also the aim to deal with two common problems in this type of analysis: the soft tissue artefacts and the registration and matching of articulated 3D models that is focal to achieve repeatable clinical analysis.
| This video shows the inference of shoulder and elbows location of the joints from points extracted with a Vicon motion capture system. The axis in green is the location of the hinge joint modelling the elbow. The shoulder joint is here modelled as an universal joint (red) but more complex models will be used in the next phases of the project. |
The following videos are further examples of our methods applied to the case of a football motion (left) and jogging (right) computed from motion captured data from the CMU Graphics Lab Motion Capture Database.
References:
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J. Fayad, A. Del Bue, L. Agapito, and P. M. Q. Aguiar, "Non-rigid structure from motion using quadratic deformation models," in British Machine Vision Conference (BMVC2009), London, UK, 2009.
@conference{Fayad:etal:2009bmvc, title={Non-rigid structure from motion using quadratic deformation models},
author={J. Fayad and A. {Del Bue} and L. Agapito and P.M.Q. Aguiar},
booktitle = {British Machine Vision Conference (BMVC2009), London, UK},
year={2009}
}
-
J. Fayad, A. Del Bue, L. Agapito, and P. M. Q. Aguiar, "Human body modelling using quadratic deformations," in 7th EUROMECH Solid Mechanics Conference, Lisbon, Portugal, 2009.
@conference{fayad:etal:2009euromech, title={Human body modelling using quadratic deformations},
author={J. Fayad and A. {Del Bue} and L. Agapito and P.M.Q. Aguiar},
booktitle={7th EUROMECH Solid Mechanics Conference, Lisbon, Portugal},
year={2009}
}
-
J. Fayad, A. Del Bue, and P. M. Q. Aguiar, "A Weighted Factorization Approach for Articulated Motion Modelling," in Multibody Dynamics, Warsaw, Poland, 2009.
@conference{Fayad:etal:2009MD, title={{A Weighted Factorization Approach for Articulated Motion Modelling}},
author={J. Fayad and A. {Del Bue} and P.M.Q. Aguiar},
booktitle={Multibody Dynamics, Warsaw, Poland},
year={2009}
}