A survey of computer vision-based human motion capture
Computer Vision and Image Understanding - Modeling people toward vision-based underatanding of a person's shape, appearance, and movement
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This paper describes an approach to accurate measurement of human joint flexion-extension angles with four biaxial accelerometers. In this method, the absolute joint angle is calculated by comparing the readings of a pair of virtual accelerometers at the joint center of rotation. The simulation results show that the measurement has high accuracy compared to the reference system (correlation coefficient factor = 0.982). Given its portability, relative low cost and high accuracy proven by simulation results, the system can be applied to motion tracking for home-based rehabilitation.