光学技术, 2014, 40 (6): 565, 网络出版: 2014-12-17
对张正友相机标定法的改进研究
Reaserch of the improvement of Zhang’s camera calibration method
应用光学电子学 相机标定 切向畸变 重建精度 内外参数 applied optoelectronics camera calibration tangential distortion accuracy of reconstruction extrinsic and intrinsic parameters
摘要
针对鱼眼镜头所存在的畸变问题, 提出了基于张正友标定法的一种改进的两步标定法。该方法把作为解析解求解出来的初始参数用非线性最小二乘法进一步完善, 得到了内外参数, 提高了初始数值的鲁棒性, 并把切向畸变作为影响重建精度的考虑因素。实验结果与张正友的方法相比, 改进的两步标定法快速收敛, 并具有1.2σ的精度。
Abstract
A new two stage camera calibration based on Zhang Zhengyou method is proposed to solve the distortion of fish eye lens. Initial parameters are solved as a closed form solution, which are further refined by using non linear least square method, the extrinsic and intrinsic parameters are got, the robustness of initial value can be improved and the tangential distortion is taken into considertion.The proposed method compares with the Zhang’s method converges fast and has anaccuracy of 1.2σ.
刘艳, 李腾飞. 对张正友相机标定法的改进研究[J]. 光学技术, 2014, 40(6): 565. LIU Yan, LI Tengfei. Reaserch of the improvement of Zhang’s camera calibration method[J]. Optical Technique, 2014, 40(6): 565.