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Camera calibration using one perspective view of two arbitrary coplanar circles

机译:使用两个任意共面圆的一个透视图进行相机校准

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摘要

We present a camera calibration technique to determine the focal length and the extrinsic parameters of a camera merely by using one perspective view of two coplanar circles with arbitrary radii and to-pological configuration. We believe our effort is valuable, in that the position of a camera and its focal length are frequently adjusted in many vision applications. In contrast to the iterative optimization technique in previous work, whose convergence relies heavily on proper initialization, we propose a closed-form solution on the basis of simple matrix operations, which turns out to be computationally efficient. It can also be used to initialize existing algorithms for higher accuracy and speed. Our method is based on the projective equation of a circle, first presented here, which naturally encodes the intrinsic and extrinsic camera parameters and the degenerate conic envelope spanned by the image of circular points. Extensive experiments with both synthetic data and real images verify the efficiency and robustness of our technique.
机译:我们提出一种相机校准技术,仅使用两个具有任意半径和视线配置的共面圆的一个透视图,即可确定相机的焦距和外部参数。我们相信我们的努力是有价值的,因为在许多视觉应用中,相机的位置及其焦距经常被调整。与先前工作中的迭代优化技术的收敛很大程度上依赖于正确的初始化相反,我们在简单矩阵运算的基础上提出了一种封闭形式的解决方案,结果证明该算法具有较高的计算效率。它还可以用于初始化现有算法,以提高准确性和速度。我们的方法基于此处首次提出的圆的投影方程,该方程自然地编码了内在和外在的相机参数以及圆点图像所覆盖的退化圆锥包络。大量的合成数据和真实图像实验验证了我们技术的效率和鲁棒性。

著录项

  • 来源
    《Optical engineering》 |2008年第6期|067203.1-067203.9|共9页
  • 作者

    Yinqiang Zheng; Yuncai Liu;

  • 作者单位

    Shanghai Jiao Tong University Image Processing and Pattern Recognition Institute 800 Dongchuan Road Shanghai 200240, China;

    Shanghai Jiao Tong University Image Processing and Pattern Recognition Institute 800 Dongchuan Road Shanghai 200240, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    camera calibration; projective equation of a circle; ICPs;

    机译:相机校准;圆的射影方程;ICPs;

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