High-speed Projection Method of Swing Plane for Golf Training

Display technologies that show dynamic information such as club swing motion are useful for golf training, but conventional methods have a large latency from sensing the motion to displaying them for users. In this study, we propose an immediate, high-speed projection method of swing plane geometric information onto the ground during the swing. The method utilizes marker-based clubhead posture estimation and a mirror-based high-speed tracking system. The intersection line with the ground, which is the geometric information of the swing plane, is immediately cast by a high-speed projector. We have experimentally confirmed the sufficiently low latency of the projection itself for swing motions and have demonstrated the temporal convergence and predictive display of the swing plane line projection around the bottom of the swing motion.