Calibration of projector-camera systems from virtual mutual projection

In this paper, we propose a new calibration method for projector-camera systems. The projector-camera systems have been studied extensively as one of new information presenting systems. For calibrating the systems, we in this paper use virtual mutual projections between a camera and a projector. We first show that by using a shadow of the camera, we can generate mutual projection between a camera and a projector virtually. By using the mutual projection, the projector camera system can be calibrated more stably than the existing calibration methods. Some experimental results show that the mutual projections work quite well for calibrating projector-camera systems.