As video projectors are becoming less expensive, we see more and more use of multiple projectors to create a single coherent image, the so-called multi-projectors displays. They provide higher resolution, larger screen size as well as more flexible screen shape. However, they must be carefully aligned and calibrated and the media, video as well as 3D, becomes harder to manage and display. By using a camera, it is possible to automatically align geometrically and photometrically the projectors using structured light.
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