A Calibration Method of Floor Projection System for Learning Aids at School Gym

This paper proposes a calibration method for a large-scale floor projection system at a school gym. In our system, the projectors are installed on the ceiling of a school gym, and the contents are projected onto the floor. The projection results suffer from both projective distortion and lens distortion. It is hard to use chessboard-based calibration methods or self-calibration methods in our system due to the restrictive deploy environment and practical limitations. Our method is basing on the projector-camera system and "straight lines have to be straight". The experiments show that our method fulfills the on-site requirements of the floor projection system at school gym for learning aid usages.