详细介绍了投影机模型,并提出一种简单、高精度的投影仪参数标定算法,该算法将投影仪当作一个逆向的相机,使用一块带有圆形标志点的平面标定板对投影仪进行标定。标定过程中,使用两组不同方向的光栅图像建立投影仪图像和相机图像的对应关系,从而得到投影仪标定所需的图像数据,将投影仪标定转化为成熟的相机标定,然后使用相机标定算法对投影仪进行高精度标定。实验结果表明,所提议的投影仪标定算法操作过程简单,标定精度可达0.312 pixel。

A projector model is described in details,and a simple and accurate projector calibration method is proposed.In this method,the projector can be viewed as an inverse camera,and a plane calibration board with circle marks is used to calibrate the projector.During the calibration processing,two series fringe patterns with different directions are projected onto the calibration board to establish accurate projector image and camera image correspondence.Thereby,the projector calibration dataset can be generated.Then the projector can be calibrated using a well established camera calibration algorithm.The experiment results show that the projector calibration algorithm proposed in this work is easy to operate and precise.The calibration precision can achieve 0.312 pixel.