该方法利用与光轴对称的径向畸变数学模型求出光学镜头的校正系数，对畸变图像进行校正。
The method USES the model of radial nonlinear distortion with the symmetry of optical axis to obtain correction coefficients of the optical lens, and then corrects the distortion image.
镜头畸变模式描述了如何根据相机畸变系数改变焦距。
The lens distortion model describes how the distortion coefficients change according to camera focal length.
在标定过程中，应用线性算法求解出了镜头的径向畸变系数。
Radial lens distortion coefficient can be obtained by linear algorithm in the calibration.
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