Design of Tennis Training with Shot-timing Feedback based on Trajectory Prediction of Ball

Abstract

Tennis has long history as a famous sport and enhanced health promotion of men and women all ages. In many cases, the style of technical teaching has been a long tradition of face-to-face. On another front, recent seamless bio-feedback technologies enable players to be trained in the acquisition of novice skills without the coach. This paper proposes a design and scenario of practice on their own with training system for tennis skills. One of the basic skills for the novices is to make an appropriate contact with the ball. We focus on skill related to judgment of shot-timing. The system provides the timing feedback based on trajectory prediction of ball. Image-processing module with Open CV preliminarily develops the estimated expression for the ball position by analyzing captured video frames. After that, the system gives color change to the ball according to the position with video projection. Therefore, a player can learn the appropriate shot timing easily. We will evaluate the training efficiency among comparison of practice using system with only one without system from the viewpoint of timing accuracy.