1. 下载Opencv，安装
2. 配置环境变量
1、系统变量 Path：添加D:opencvopencv-2.4.9opencvuildx86vc12in
2、用户变量：添加opencv变量，值D:opencvopencv-2.4.9opencvuildx86vc12in变量值实际为bin文件夹的路径；
说明：不管你系统是32位还是64位，路径目录均选择X86，因为编译都是使用32位编译；如果选用X64，则程序运行时候会出错。
重启！
3. VS工程设置：
1, 在项目->属性对话框中，左侧“配置”选择“Debug”，然后“配置属性”->VC++目录，在右侧设置“包含目录”，新添加：
D:opencvopencv-2.4.9opencvuildinclude
D:opencvopencv-2.4.9opencvuildincludeopencv
D:opencvopencv-2.4.9opencvuildincludeopencv2
2, 在“库目录”，添加:
D:opencvopencv-2.4.9opencvuildx86vc12lib
3,【通用属性】 ->【链接器】->【输入】->【附加的依赖项】
debug:
opencv_ml249d.lib
opencv_calib3d249d.lib
opencv_contrib249d.lib
opencv_core249d.lib
opencv_features2d249d.lib
opencv_flann249d.lib
opencv_gpu249d.lib
opencv_highgui249d.lib
opencv_imgproc249d.lib
opencv_legacy249d.lib
opencv_objdetect249d.lib
opencv_ts249d.lib
opencv_video249d.lib
opencv_nonfree249d.lib
opencv_ocl249d.lib
opencv_photo249d.lib
opencv_stitching249d.lib
opencv_superres249d.lib
opencv_videostab249d.lib
Release:
opencv_ml249.lib
opencv_calib3d249.lib
opencv_contrib249.lib
opencv_core249.lib
opencv_features2d249.lib
opencv_flann249.lib
opencv_gpu249.lib
opencv_highgui249.lib
opencv_imgproc249.lib
opencv_legacy249.lib
opencv_objdetect249.lib
opencv_ts249.lib
opencv_video249.lib
opencv_nonfree249.lib
opencv_ocl249.lib
opencv_photo249.lib
opencv_stitching249.lib
opencv_superres249.lib
opencv_videostab249.lib