编译时找不到opencv2/opencv.hpp
如果没有这两个目录/usr/include/opencv 和 /usr/include/opencv2 说明未安装
sudo yum install opencv opencv-devel opencv-python
编译时找不到opencv2/opencv.hpp
如果没有这两个目录/usr/include/opencv 和 /usr/include/opencv2 说明未安装
sudo yum install opencv opencv-devel opencv-python