Autocalibration of a projector-camera system
Autocalibration of a projector-camera system
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DOI：
10.1109/tpami.2005.235
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发表时间：
2005-12-01
影响因子：
23.6
通讯作者：
Deguchi, K
中科院分区：
文献类型：
--
作者：
Okatani, T;Deguchi, K
本文提出了一种标定投影机-摄像机系统的方法，该系统由多个投影机（或单个投影机的多个姿态）、摄像机和平面屏幕组成。我们考虑估计屏幕和摄像机的图像平面之间的单应性或屏幕-摄像机单应性的问题，在没有关于屏幕表面的先验知识的情况下，使得能够直接计算单应性。假设每个投影仪的姿态是未知的，而其内部几何形状是已知的。随后，它示出的屏幕摄像机单应性可以确定从只有由投影仪投影的图像，然后由摄像机获得的，高达四个自由度的变换。该变换对应于在屏幕表面上选择二维坐标系的任意性，并且当以某种方式选择该坐标系时，可以唯一地确定屏幕-相机单应性以及投影仪的未知姿态。本文提出了一种非迭代算法，该算法从三幅或多幅图像中计算单应性。对合成图像和真实的图像的实验结果证明了该方法的有效性。
This paper presents a method for calibrating a projector-camera system that consists of multiple projectors (or multiple poses of a single projector), a camera, and a planar screen. We consider the problem of estimating the homography between the screen and the image plane of the camera or the screen-camera homography, in the case where there is no prior knowledge regarding the screen surface that enables the direct computation of the homography. It is assumed that the pose of each projector is unknown while its internal geometry is known. Subsequently, it is shown that the screen-camera homography can be determined from only the images projected by the projectors and then obtained by the camera, up to a transformation with four degrees of freedom. This transformation corresponds to arbitrariness in choosing a two-dimensional coordinate system on the screen surface and when this coordinate system is chosen in some manner, the screen-camera homography as well as the unknown poses of the projectors can be uniquely determined. A noniterative algorithm is presented, which computes the homography from three or more images. Several experimental results on synthetic as well as real images are shown to demonstrate the effectiveness of the method.