实现相机标定与畸变矫正，主要针对鱼眼镜头畸变的校正。源码中需要将int t_main修改为int main，其余均有解释，可按需求更改。-Achieve camera calibration and distortion correction, mainly for correcting fisheye distortion. Source code need to be modified to int t_main int main,

能够利用此源码利用棋盘图得到相机内参，并对所拍棋盘图进行校正。需要配置opencv环境，源码在Ubuntu上Clion上运行(This source code can use the chessboard diagram to get the camera internal parameters and correct the chessboard diagram. You need to configure the opencv en