An Interactive Warping Method for Multi-channel VR Projection Display Systems with Quadric Surface Screens

In this paper, we present a practical non-camera-based interactive warping method for multi-channel immersive VR projection display systems with quadric surface screens. Instead of using one or multiple cameras as most previous methods did, we employ a commercial theodolite and a mouse to interactively calibrate each projector on site. By taking advantage of the nature of shape of the curved screen, we are able to perform fast, robust projector calibration and compute the warping map for each projector by taking other system information into account, i.e., position/frustum of the designed eye point (DEP). Compared with camera-based solutions, our method is accurate, cost-effective, simple to operate, and can reduce system set-up time and complexity efficiently. The feasibility of our method has been verified by many real site installations.