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J4  2014, Vol. 48 Issue (3): 404-413    DOI: 10.3785/j.issn.1008-973X.2014.03.005
计算机技术,无线电电子学     
利用直线段成像特性的摄像机畸变迭代标定方法
徐嵩1,孙秀霞1,何衍2
1. 空军工程大学 航空航天工程学院,陕西 西安 710038; 2. 浙江大学 电气工程学院 浙江 杭州 310027
Iterative method of camera distortion calibration utilizing lines-imaging characteristics
XU Song1,SUN Xiu-xia1,HE Yan2
1. Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi’an 710038, China;
2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

提出一种标定非量测摄像机成像中心和畸变参数的新方法,解决了不进行摄像机线性内外参数求解即可对多种单参数畸变模型进行标定的问题.该方法由两步组成:近似标定,添加直线与近似呈圆弧的直线段畸变成像形成闭合曲线,得出其闭合面积及端点与畸变参数及中心的近似关系;参考模型逼近,依据该闭合曲线端点及当前标定值,由畸变模型生成闭合曲线的参考面积值和曲线端点的无畸变成像位置,以此修正该近似关系,进而逼近准确的畸变中心与参数.仿真和真实图像实验均表明,该方法利用四条成像直线段即可实现高精度标定且收敛迅速.

Abstract:

A new method which can calibrate the image center and distort parameters of the non-metric camera was proposed, independent of a known imaging center which is fit for several different mono-parameter distortion models. This method is made up of following two parts. First, approximate calibration: the curves distorted from straight lines are closed by adding straight-line segments, and the area of those closed curves is computed. The approximate relationships between these areas with theirends and the distortion parameter with the center are elicited. Second, approaching by model reference: the approximate relationship is iteratively modified by the reference values of the curve areas and the undistorted end points, according to the distortion calibration, based on the endpoints of these curves and the current calibration. Thus, the distortion parameter and the center are iteratively approaching the real values. Simulations and real image tests show that this method can calibrate distortion exactly using only four imaging lines without known any cameras linear parameters, and convergent fast.

出版日期: 2018-06-10
:  TP 391.4  
基金资助:

 航空科学基金资助项目(20121396008,20135896025).

通讯作者: 孙秀霞,女,教授,博导.     E-mail: kgycw@163.com
作者简介: 徐嵩(1985-),男,博士生,主要研究方向为视觉导航. E-mail: xusong_pla@163.com
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引用本文:

徐嵩,孙秀霞,何衍. 利用直线段成像特性的摄像机畸变迭代标定方法[J]. J4, 2014, 48(3): 404-413.

XU Song,SUN Xiu-xia,HE Yan. Iterative method of camera distortion calibration utilizing lines-imaging characteristics. J4, 2014, 48(3): 404-413.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.03.005        http://www.zjujournals.com/eng/CN/Y2014/V48/I3/404

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