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Sensors 2017, 17(7), 1591; https://doi.org/10.3390/s17071591

A Study of Vicon System Positioning Performance

1
Normandie University, UNIROUEN, ESIGELEC, IRSEEM, 76000 Rouen, France
2
Department of Multimodal Transportation Infrastructure, Cerema, 76120 Le Grand Quevilly, France
3
Normandie University, UNIROUEN, UNIHAVRE, INSA Rouen, LITIS, 76000 Rouen, France
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 23 May 2017 / Revised: 4 July 2017 / Accepted: 5 July 2017 / Published: 7 July 2017
(This article belongs to the Section Physical Sensors)
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Abstract

Motion capture setups are used in numerous fields. Studies based on motion capture data can be found in biomechanical, sport or animal science. Clinical science studies include gait analysis as well as balance, posture and motor control. Robotic applications encompass object tracking. Today’s life applications includes entertainment or augmented reality. Still, few studies investigate the positioning performance of motion capture setups. In this paper, we study the positioning performance of one player in the optoelectronic motion capture based on markers: Vicon system. Our protocol includes evaluations of static and dynamic performances. Mean error as well as positioning variabilities are studied with calibrated ground truth setups that are not based on other motion capture modalities. We introduce a new setup that enables directly estimating the absolute positioning accuracy for dynamic experiments contrary to state-of-the art works that rely on inter-marker distances. The system performs well on static experiments with a mean absolute error of 0.15 mm and a variability lower than 0.025 mm. Our dynamic experiments were carried out at speeds found in real applications. Our work suggests that the system error is less than 2 mm. We also found that marker size and Vicon sampling rate must be carefully chosen with respect to the speed encountered in the application in order to reach optimal positioning performance that can go to 0.3 mm for our dynamic study. View Full-Text
Keywords: motion capture; positioning; evaluation; human motion; robotics motion capture; positioning; evaluation; human motion; robotics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Merriaux, P.; Dupuis, Y.; Boutteau, R.; Vasseur, P.; Savatier, X. A Study of Vicon System Positioning Performance. Sensors 2017, 17, 1591.

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