关键词: 多投影机, 几何校正, 非平面显示

Abstract: Non-planar projection has been widely applied in virtual reality, digital entertainment and exhibitions for its flexible layout and immersive display effects. Compared with planar projection, non-planar projection is more difficult to achieve since the problem of projector calibration and image distortion correction. The current projection calibration algorithm can be divided into two categories, using 3D reconstruction or not. Methods using 3D reconstruction are time-consuming and require costly equipments. Methods do not use 3D reconstruction may require manual operation and has poor adaptability in view-independent applications. This paper particularly studies the property of cylindrical screen and presents a novel method for calibrating multi-projector automatically in non-planar environment without 3D reconstruction. This method can correct the error caused by manufacturing and arranging of the screen, and it also can be used in surface which can be parameterized, like sphere, ellipsoid, paraboloid, etc.

Key words: multi-projector, geometric registration, non-planar display