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KMID : 0608320220290020087
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Physical Therapy Korea
2022 Volume.29 No. 2 p.87 ~ p.93
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A Review of Motion Capture Systems: Focusing on Clinical Applications and Kinematic Variables
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Lim Woo-Taek
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Abstract
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To solve the pathological problems of the musculoskeletal system based on evidence, a so-phisticated analysis of human motion is required. Traditional optical motion capture systems with high validity and reliability have been utilized in clinical practice for a long time. However, expensive equipment and professional technicians are required to construct optical motion capture systems, hence they are used at a limited capacity in clinical settings despite their advantages. The development of information technology has overcome the existing limit and paved the way for constructing a motion capture system that can be operated at a low cost. Recently, with the development of computer vision-based technology and optical marker-less tracking technology, webcam-based 3D human motion analysis has become possible, in which the intuitive interface increases the user-friendliness to non-specialists. In addition, unlike conventional optical motion capture, with this approach, it is possible to analyze mo-tions of multiple people at simultaneously. In a non-optical motion capture system, an inertial measurement unit is typically used, which is not significantly different from a conventional optical motion capture system in terms of its validity and reliability. With the development of markerless technology and advent of non-optical motion capture systems, it is a great advan-tage that human motion analysis is no longer limited to laboratories.
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KEYWORD
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Acceleration, Kinematics, Kinetics, Orientation, Range of motion
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