错误：
/home/knight/GVINS_GI/src/GVINS-main/camera_model/src/chessboard/Chessboard.cc:38:43: error: ‘CV_CALIB_CB_NORMALIZE_IMAGE’ was not declared in this scope CV_CALIB_CB_NORMALIZE_IMAGE +
解决：
1.查看自己的OPENCV版本
pkg-config --modversion opencv
2.看出错代码位置
/home/knight/GVINS_GI/src/GVINS-main/camera_model/src/chessboard/Chessboard.cc
3.打开位于上层的cmakelist文件将
将这个：find_package( OpenCV REQUIRED )
替换为（自己的版本）：find_package( OpenCV 3 REQUIRED )
4.catkin_make
