在编译caffe时，我们往往会在caffe里配置opencv，网上opencv的安装教程里通常都是将opencv默认安装到
/usr/local目录，而很多caffe也是据此在caffe里配置opencv，如果你的opencv安装到其他目录那么在配置caffe时就必须修改相应配置否则会编译失败。假设你的opencv安装在/home/opencv3dll目录下。
在配置caffe时很多教程会提醒做下面的修改：
将# Whatever else you find you need goes here. 下面的
INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib修改为：
INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include /usr/include/hdf5/serial
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib /usr/lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu/hdf5/serial这里加入了编译搜索的链接库路径和头文件路径，所以你需要将自己opencv相应路径加进去
INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include /usr/include/hdf5/serial /home/opencv3dll/include/
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib /usr/lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu/hdf5/serial /home/opencv3dll/lib/如此，caffe在编译时才能正确找到opencv的安装路径
