光栅投影式3维照相系统中光栅投影仪的标定

Calibration of Projector in 3D Photography Systems Using Grating Projection

提出了一种光栅投影式立体照相系统中光栅投影平面的标定方法。将光栅投影到已知目标平面,通过数字摄影得到光栅平面与目标平面相交的光栅图像。根据光栅图像记录的信息,在每条交线上提取两点,作为对应光栅平面拟合用的两点。按一定规律移动目标平面,即可得到每个光栅平面上若干对点。利用最小二乘法分别拟合出每个光栅平面的空间平面方程。

In this paper, a method is proposed for projector calibration in 3D photography systems using grating projection. An image with intersection lines between grating planes and a known objective plane can be captured by a digital camera. According to the image a pair of points can be extracted from each of intersection lines. If we move the known objective plane to known positions, we can get more pairs of points belonging to the same plane. At the last, every grating plane equation can be approached with Least Square Fit Algorithm based all corresponding sample 3D points on it.