University of Michigan reporting on the project offers this summary:
The goal of iGYM, an augmented reality game system created by a team of University of Michigan researchers led by Roland Graf, associate professor at U‑M’s Penny W. Stamps School of Art & Design, is to create a truly inclusive environment for children to play and exercise together.
The current implementation of the system resembles soccer — or a life-size game of air hockey — with a court projected on the floor by two ceiling-mounted projectors and a goal on either side. Upon entering the field, an overhead computer vision camera detects each player and surrounds them with a “peripersonal circle,” which they can use to hit a projected ball or puck toward the other player’s goal.
Players can expand their circle to “kick” the ball by extending their arms, physically kicking or by pressing a “kick-button” mounted on their body. This simple circle-expanding functionality creates an equitable play experience for kids with mobility disabilities and their peers without disabilities.