J4 ›› 2010, Vol. 37 ›› Issue (6): 1148-1154.doi: 10.3969/j.issn.1001-2400.2010.06.030

• 研究论文 • 上一篇    

椭圆拟合的圆环模板摄像机标定

李龙1;何明一1;李娜2
  

  1. (1. 西北工业大学 电子信息学院,陕西 西安  710129;
    2. 西安电子科技大学 通信工程学院,陕西 西安  710071)
  • 收稿日期:2010-05-07 出版日期:2010-12-20 发布日期:2011-01-22
  • 通讯作者: 李龙
  • 作者简介:李龙(1979-),男,西北工业大学博士研究生,E-mail: dragon2000_ren@163.com.
  • 基金资助:

    国家自然科学基金资助项目(60736007)

Camera calibration based on the circular pattern and ellipse fitting

LI Long1;HE Ming-yi1;LI Na2   

  1. (1. School of Electr. and Info., Northwestern Polytechnical Univ., Xi'an  710129, China;
    2. School of Telecommunication Engineering, Xidian Univ., Xi'an  710071, China)
  • Received:2010-05-07 Online:2010-12-20 Published:2011-01-22
  • Contact: LI Long

摘要:

结合平面模板和一维标定物摄像机标定方法的优点,提出了一种新的基于椭圆拟合的圆环模板摄像机标定方法.该方法设计了一种新的圆环模板,只需要3副模板图像即可标定摄像机; 通过引入椭圆拟合精确定位圆环模板特征点,利用非线性优化进一步提高了摄像机的标定精度.仿真实验结果表明,该方法精确度高、鲁棒性强,通过在真实图像上的实验,验证了该算法的性能.

关键词: 摄像机标定, 圆环模板, 椭圆拟合, 非线性优化

Abstract:

A novel camera calibration method based on the circular pattern and ellipse fitting is proposed, which combines the advantages of camera calibration based on the planar pattern and one dimensional object. The proposed method designs a new circular pattern, which needs three images of the pattern to calibrate the camera. Ellipse fitting is introduced to locate the feature points in the circular pattern precisely and nonlinear optimization is utilized, and thus the calibration precision has been improved significantly. Experimental results for synthetic data show that the proposed strategy is both accurate and robust. Experimental results for real images prove the performance of the proposed algorithm.

Key words: camera calibration, circular pattern, ellipse fitting, nonlinear optimization

中图分类号: 

  • TP391