http://stackoverflow.com/questions/2584273/issue-with-reading-an-image-using-cvimread-function-in-opencv
链接的库文件有两种：opencv_*.lib，opencv_*d.lib
在debug下，只添加诸如opencv_*d.lib的库，不要opencv_*d.lib与opencv_*.lib都添加！
在release下，只添加诸如opencv_*.lib的库，不要opencv_*d.lib与opencv_*.lib都添加！