Method of image alignment for calibration of multi-projector displays
针对多投影仪显示墙画面校正的图像对准技术

A practical image alignment method based on self-adapting subdivision mesh is proposed, which can align the projector imagery on arbitrary smooth curved screen with camera image. It is designed for calibration problem of multi-projector displays. Using sparse initial corresponding points between the frame buffer of projector and the image of camera, the proposed method can subdivide it into arbitrary precision. Hence, the one to one correspondence of pixels between the frame buffer of projector and image of camera can be established. This correspondence can be used as the foundation of methods for the calibration problem of multi-projector displays. Comparative analysis of existing algorithms and real applications on virtual airport control tower simulation system show that the proposed method can align images more accurately, without any explicit prior knowledge of projector, camera and screen.