System and method of multi-user coaching inside a tunable motion-sensing range

A system and a method of multi-user coaching inside a tunable motion-sensing range are introduced herein. By using a plurality of motion-sensing camera to capture images and using a depth image stitching module to perform depth image stitching on the captured images to extend the motion-sensing range, thereby a virtual environment for multi-user coaching is established therefrom. All of the users can respectively follow instructions for them in the virtual environment to improve their motions by a one-to-many manner. By using the system and method of multi-user coaching inside a large tunable motion-sensing range, motions of users are calculated by motion similarity and individual instructions are feedback for each of the users accordingly, to provide more application environments or games such as a virtual gymnasium, a virtual aerobics classroom or a virtual Budokan.