Abstract
Pitching motion of baseball is split into several phases for analysis. Key frames that illustrated characteristic postures are shown with pauses when instruction using video is performed. However, manual cueing will be a burden for instructor and also requires time. Therefore, we developed a system which extracts five kinds of key frames for baseball pitching motion automatically by using a simple motion capture device. In addition, we evaluated the accuracy of the system. The system has extracted key frames except for a high-speed movement phase, which is a limit of the device.
