摘要
两步法摄像机标定,先用径向排列约束得到部分外部参数精确解,再将其余外部参数与畸变修正参数进行迭代求解。对该标定法的改进,是在两步法得到的摄像机参数值基础上,用非线性优化算法对所有参数进一步优化,得到最终参数值。该法既提高了摄像机标定精度,又无需对CCD摄像机像面中心预标定,简化了标定过程。
The two-stage camera calibration firstly maked use of radial alignment constraint to solve the precise value of some extrinsic parameters; then obtained other parameters and corrected distortion parameter by means of iteration. Based on the camera parameters obtained by two-stage method, nonlinear optimization was used in the improved method in order to further optimize all parameters and acquire their values simultaneously. Because the pre-calibration of the image plane center of the CCD camera could be omitted, the improved method simplified the process of calibration and improves the precision of calibration at the same time.
出处
《兵工自动化》
2006年第9期73-75,共3页
Ordnance Industry Automation
关键词
摄像机标定
两步法
非线性优化
Camera calibration
Two-stage method
Nonlinear optimization
