NDLI: A Markerless Motion Capture System to Study Musculoskeletal Biomechanics: Visual Hull and Simulated Annealing Approach

Content Provider	Springer Nature Link
Author	Corazza, S. Mündermann, L. Chaudhari, A. M. Demattio, T. Cobelli, C. Andriacchi, T. P.
Copyright Year	2006
Abstract	Human motion capture is frequently used to study musculoskeletal biomechanics and clinical problems, as well as to provide realistic animation for the entertainment industry. The most popular technique for human motion capture uses markers placed on the skin, despite some important drawbacks including the impediment to the motion by the presence of skin markers and relative movement between the skin where the markers are placed and the underlying bone. The latter makes it difficult to estimate the motion of the underlying bone, which is the variable of interest for biomechanical and clinical applications. A model-based markerless motion capture system is presented in this study, which does not require the placement of any markers on the subject's body. The described method is based on visual hull reconstruction and an a priori model of the subject. A custom version of adapted fast simulated annealing has been developed to match the model to the visual hull. The tracking capability and a quantitative validation of the method were evaluated in a virtual environment for a complete gait cycle. The obtained mean errors, for an entire gait cycle, for knee and hip flexion are respectively 1.5° (±3.9°) and 2.0° (±3.0°), while for knee and hip adduction they are respectively 2.0° (±2.3°) and 1.1° (±1.7°). Results for the ankle and shoulder joints are also presented. Experimental results captured in a gait laboratory with a real subject are also shown to demonstrate the effectiveness and potential of the presented method in a clinical environment.
Starting Page	1019
Ending Page	1029
Page Count	11
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	34
Issue Number	6
e-ISSN	15739686
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-05-05
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human motion capture Musculoskeletal biomechanics Visual hull Simulated annealing Biomedical Engineering Biophysics/Biomedical Physics Mechanics Biochemistry Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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