激光跟踪仪在摄像机标定中的应用  

Application of laser tracker in camera calibration

作　　者：陈杰春[1] 张恒[1] 赵丽萍[2] 

机构地区：[1]东北电力大学自动化工程学院,吉林吉林132012 [2]东北电力大学理学院,吉林吉林132012

出　　处：《制造技术与机床》2012年第9期100-103,共4页Manufacturing Technology & Machine Tool

基　　金：东北电力大学博士科研启动基金项目(BSJXM-200920)

摘　　要：使用激光跟踪仪标定摄像机的方法主要解决2个问题:(1)如何生成传统标定方法需要使用的控制点;(2)如何精确测量控制点的三维世界坐标。在摄像机的视场中安放一块表面平整的标定板,然后把激光跟踪仪的测量光束直接投射在标定板的表面上,在标定板表面生成的指示光斑被用作标定摄像机的控制点。用激光跟踪仪测量出标定板平面的方程,然后将测量光束看作一条直线,由测量光束和标定板平面的方程求解控制点的三维世界坐标。通过实验对该方法做了验证,实验结果表明:该方法适合标定视场较大的摄像机,而且可以获得较高的测量精度。The camera calibration method using a laser tracker mainly solves two problems:(1) How to produce the control points used by traditional method for camera calibration;(2) How to measure the 3D coordinates of the control points.A calibration board is placed in the working volume of a camera,and then we project the laser beam emitted from a laser tracker onto the surface of the calibration board directly.The laser spot produced on the surface of the calibration board is regarded as a control point.The equation of the surface of the calibration board is firstly measured by using a laser tracker.Then,we regard the laser beam emitted from the laser tracker as a line,and the 3D coordinates of the control point is determined by combining the equations of the laser beam and the surface of the calibration board.The method proposed in this paper has been validated,and the experimental result show that it is suitable to calibrate the camera with a broad working volume,and can be used to obtain higher accuracy.

关 键 词：激光跟踪仪 摄像机 标定 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]