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.
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.
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|Item Type:||Journal Article|
|Keywords:||3D Kinematics, Accuracy, Gait Analysis|
|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:||07 Mar 2012 22:39|
|Last Modified:||13 Mar 2013 21:48|
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