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Next generation low-cost motion capture systems can provide comparable spatial accuracy to high-end systems

Thewlis, Dominic , Bishop, Chris , Daniell, Nathan , & Paul, Gunther (2013) Next generation low-cost motion capture systems can provide comparable spatial accuracy to high-end systems. Journal of Applied Biomechanics, 29(1), pp. 112-117.

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Abstract

The objective quantification of three-dimensional kinematics during different functional and occupational tasks is now more in demand than ever. The introduction of new generation of low-cost passive motion capture systems from a number of manufacturers has made this technology accessible for teaching, clinical practice and in small/medium industry. Despite the attractive nature of these systems, their accuracy remains unproved in independent tests. We assessed static linear accuracy, dynamic linear accuracy and compared gait kinematics from a Vicon MX20 system to a Natural Point OptiTrack system. In all experiments data were sampled simultaneously. We identified both systems perform excellently in linear accuracy tests with absolute errors not exceeding 1%. In gait data there was again strong agreement between the two systems in sagittal and coronal plane kinematics. Transverse plane kinematics differed by up to 3 at the knee and hip, which we attributed to the impact of soft tissue artifact accelerations on the data. We suggest that low-cost systems are comparably accurate to their high-end competitors and offer a platform with accuracy acceptable in research for laboratories with a limited budget.

Impact and interest:

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ID Code: 49005
Item Type: Journal Article
Keywords: 3D Kinematics, Accuracy, Gait Analysis
ISSN: 1543-2688
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Public Health & Social Work
Copyright Owner: Copyright 2012 Human Kinetics, Inc
Deposited On: 08 Mar 2012 08:39
Last Modified: 14 Mar 2013 07:48

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