Large Scale Interactive AR Display Based on a Projector-Camera System

School gymnasium, which has an important role in either physical or mental development of children, is a necessary facility for most schools. In recent years, considering the individual differences among students in terms of gender, age, developmental level or interest, many new forms of gymnasium activity have been developed to make physical education more flexible. In some cases, introducing new physical activity is accompanied by a requirement of drawing new contents on the floor of a gymnasium. Ordinary, this is done by using line-tape. However, contents created by line-tape need periodic maintenance that is costly and time-consuming. Moreover, overlapping lines for different purposes can make users confused. Furthermore, the most critical problem is that line-tape can represent only simple and static contents, thus, the variety of new physical education activity are greatly limited. This paper proposes a projection-based AR system consisting of multiple projectors and cameras to deal with the problems described above. This system is aiming to provide extension functions to traditional school gymnasium by realizing not only representation of dynamic AR contents but also interactive display on the gymnasium floor.