激光技术, 2006, 30 (2): 0221, 网络出版: 2010-06-03
用共线点列标定摄像机镜头畸变
Camera lens distortion calibration with co-line points
仪器测量与计量 镜头畸变 摄像机标定 图像纠正 交叉比 iustrvmentation measarement and metrology lens distortion camera calibration image correcting cross ratio
摘要
提出一种用共线点列标定摄像机镜头畸变参数的方法,先根据交叉比不变性确定畸变中心,再利用直线的中心投影仍为直线这一性质确定畸变系数。仿真表明,只要采用相应方法降低像点坐标的误差,畸变中心的误差小于2个像素,畸变系数的相对误差不超过0.1。实验表明,用该方法得到的畸变参数,能够很好地校正图像。该方法简单易行,可应用于摄影测量、计算机视觉等领域。
Abstract
A camera calibration method with co-line points is proposed,in which distortion center is located according to cross ratio invariability,and then distortion coefficients are calculated based on a line's central projection is a line. The emulation indicates that only if some measures are adopted to decrease the projection points 'coordinate error,error of the distortion center would be less than 2 pixels and relative error of the distortion coefficients would be no more than 0.1.The experiment shows that these distortion parameters gained with the proposed method are good at a correcting distortion image. Because of its easiness and simplicity,this method can be used in some domains such as photogrammetry,computer vision,etc.
张靖, 朱大勇, 贾晓东. 用共线点列标定摄像机镜头畸变[J]. 激光技术, 2006, 30(2): 0221. ZHANG Jing, ZHU Da-yong, JIA Xiao-dong. Camera lens distortion calibration with co-line points[J]. Laser Technology, 2006, 30(2): 0221.