A method for calibrating camera lens distortion with cross-ratio invariability in welding seam system
Zhao, Guangtao; Qiao, Hong
2008
会议名称1st International Conference Intelligent Robotics and Applications
会议录名称INTELLIGENT ROBOTICS AND APPLICATIONS
会议日期OCT 15-17, 2008
会议地点Wuhan, PEOPLES R CHINA
摘要Wide-Angle tenses have broad applications in lots of fields for their larger fields of view. However, image deformation is its main backward. Thus, calibration of distortion parameters of wide-angle lens is an essential procedure for 3D information recovering from 2D images in applications. Based on our 3D welding seam extraction system, we propose a nonlinear calibration method by using calibration grid. This simple method only considers the distortion parameters so that the coupling between internal and external parameters of the camera is avoided. Moreover, it needs only feature point series which satisfy cross-ratio invariability, and need not know the exact position coordinates of the points. The nonlinear optimization is fast since the initial value of the distortion parameters can be obtained with cross-ratio invariability. Experiments show the efficiency and practicality of our method directly.
关键词Camera Calibration Radial Distortion Decentering Distortion Cross-ratio Invariability Wide-angle Lens
文献类型会议论文
条目标识符http://ir.ia.ac.cn/handle/173211/12811
专题复杂系统管理与控制国家重点实验室_机器人理论与应用
通讯作者Qiao, Hong
作者单位Chinese Acad Sci, Inst Automat
推荐引用方式
GB/T 7714
Zhao, Guangtao,Qiao, Hong. A method for calibrating camera lens distortion with cross-ratio invariability in welding seam system[C],2008.
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