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Evaluation of the performance of a motion capture system for small displacement recording and a discussion for its application potential in bone deformation in vivo measurements

Yang, Pengfei and Sanno, Maximilian and Brüggemann, Gert-Peter and Rittweger, Jörn (2012) Evaluation of the performance of a motion capture system for small displacement recording and a discussion for its application potential in bone deformation in vivo measurements. Journal of Engineering in Medicine, 226, pp. 838-847. Institution of Mechanical Engineers (Great Britain). DOI: 10.1177/0954411912452994

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Official URL: http://www.ncbi.nlm.nih.gov/pubmed/23185954

Abstract

The aim of this study is to evaluate the performance of a motion capture system and discuss the application potential of the proposed system in in vivo bone-segment deformation measurements. In this study, the effects of the calibration procedure, camera distance and marker size on the accuracy and precision of the motion capture system have been investigated by comparing the captured movement of the markers with reference movement. The results indicated that the system resolution is at least 20mm in a capture volume of 40033003300mm3, which mostly covers the range of motion of the tibia during the stance phase of one gait cycle. Within this volume, the system accuracy and precision decreased following the increase of camera distance along the optical axis of the cameras. With the best configuration, the absolute error and precision for the range of 20mm displacement were 1.2–1.8mm and 1.5–2.5mm, respectively. Small markers (Ø3–8 mm) yielded better accuracy and repeatability than the larger marker (Ø10.5mm). We conclude that the proposed system is capable of recording minor displacements in a relative large volume.

Item URL in elib:https://elib.dlr.de/79224/
Document Type:Article
Title:Evaluation of the performance of a motion capture system for small displacement recording and a discussion for its application potential in bone deformation in vivo measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yang, PengfeiPengfei.Yang (at) dlr.deUNSPECIFIED
Sanno, MaximilianDeutsche SporthochschuleUNSPECIFIED
Brüggemann, Gert-PeterDeutsche SporthhochschuleUNSPECIFIED
Rittweger, Jörnjoern.rittweger (at) dlr.deUNSPECIFIED
Date:November 2012
Journal or Publication Title:Journal of Engineering in Medicine
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:226
DOI :10.1177/0954411912452994
Page Range:pp. 838-847
Publisher:Institution of Mechanical Engineers (Great Britain)
Status:Published
Keywords:Motion capture system, bone strain, in vivo, accuracy, precision
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Becker, Christine
Deposited On:03 Dec 2012 11:25
Last Modified:31 Jul 2019 19:38

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