| Summary: | 碩士 === 國立體育學院 === 運動科學研究所 === 93 === The motion analysis system has been used in sports science study, training and Physical education class learning site extensively but the costs for the equipments are high. This study intended to use USB 2.0 WebCam and C++ programming language as tools to construct a 2D motion tracking system..The human joint makers are located at head, shoulder, elbow, wrist, hand, hip, knee, ankle, heel and toe respectively. The tracking method used body structure parameters and image processing algorithms to trace and calculate coordinate of the makers. The results were as follow: 1.A 2D human tracking system has been successfully developed; 2. The system can accurately trace walking speed up to 1.2 m/s; 3. The raw data were corrected and transformed with image adjustment technique to present the biomechanical parameter changes of a walking gate. Future research can give attention to 3D tracking as well as the use in e-learning environment.
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