一种用于鱼眼镜头的线性标定方法

A Linear Calibration Method for Fisheye Lens

针对鱼眼镜头的高精度标定需求,提出一种基于除法畸变模型的线性标定方法。通过除法模型将标定问题转换为线性方程组求解问题,在确定相机畸变中心后对畸变方程与投影矩阵进行解耦,分别求解相机内外参数和畸变系数,从而实现鱼眼镜头的快速鲁棒标定。实验结果表明,与非线性标定方法相比,该方法在保证标定准确性和可靠性的同时,计算效率提高了约10倍。

To meet the high-precision calibration demands of fisheye lens,this paper proposes a linear calibration method based on the division distortion model.The method converts the calibration problem into solving linear equation sets with a division model.Center of camera distortion located,the distortion equation is decoupled from the projection matrix,and the intrinsic and extrinsic parameters of the camera and distortion coefficients are solved respectively.Then,the robust calibration of fisheye lens can be completed.Experimental results show that compared with non-linear calibration methods,the proposed method increases computational efficiency about 10 times while keeping the accuracy and reliability of calibration.