error while loading shared libraries: libopencv_core.so.3.4: cannot open shared object file: No such file or directory

1. 将CMakeLists.txt 文件中 find_package(OpenCV REQURED)补充完整为带版本号的：find_package(OpenCV 2.4.9 REQURED)

2. 将程序编译，若还不通过，参考这篇博文：https://blog.csdn.net/lql0716/article/details/54434695