Visualisation of tennis swings for coaching

As a proficient tennis swing is a key element of success in tennis, many amateur tennis players spend a considerable amount of time and effort perfecting their tennis stroke mechanics, hoping to create more accuracy, consistency and power in their swing. In order to achieve these aims effectively a number of independent aspects of technique need to be addressed, including forming a correct racket grip, shot timing, body orientation and precise follow-through. Outside of a one-to-one coaching scenario, where constant professional feedback on technique can be provided, keeping all aspects of technique in mind can overwhelm amateur players. In this work, we have developed a set of visualisation tools to augment the development of amateur tennis players between dedicated one-to-one coaching sessions in the area of technique, timing and body posture. Our approach temporally aligns an amateur player´s swing dynamics with that of an elite athlete, allowing direct technique comparison using augmented reality techniques.