OpenCV丢失Nonfree模块（解决方案1）

（关于解决方案2：https://blog.csdn.net/IT_flying625/article/details/103231212）

在opecv3.0中，SURF/SIFT 以及其它的一些东西被移动到了独立的库(opencv_contrib repo)中

所以需要使用cmake重新编译

一、下载

为了确保不会报错，这里使用OpenCV版本和OpenCV Contrib版本保持一致

1.OpenCV Contrib https://github.com/opencv/opencv_contrib 3.4.8

2. OpenCV https://github.com/opencv/opencv 3.4.8

3. cmake-gui下载地址：http://www.cmake.org/cmake/resources/software.html

二、使用cmake生成OpenCV.sln

打开cmake-gui

在where is the source code选择opencv的安装目录，我的是D:\opencv3\opencv\sources

在where to build the binaries里面选择要将opencv编译到的目录下面，我的是：D:\opencv3\opencv\mybuild

点击configure，在弹出的对话框内选择 Visual Studio 2013和default参数，点击finish。

这个时候cmake会开始编译不知道什么东西，然后会在屏幕中间出现一堆参数包括Name和Value，在其中找到Name为OPENCVEXTRAMODULESPATH的参数，然后把它的Value设置为opencvcontrib的路径，我的是D:/Files/Codes/Tracking/Exp/opencvcontrib-master/opencvcontrib-master/modules

注意，不要因为路径报错https://blog.csdn.net/IT_flying625/article/details/103065993

三、用VS编译生成debug和release库

打开D:\opencv3\opencv\mybuild目录下的OpenCV.sln

编译debug版本库：在“解决方案'OpenCV'（141个项目）”上面点击右键-->重新生成解决方案。

找到CMakeTargets中的INSTALL，然后右键选择“仅限于项目”-->“仅生成INSTALL”，然后就在D:\opencv3\opencv\mybuild\install中发现了许多东东。

四、重新配置自己的项目

VC++目录-->包含目录，添加： D:\opencv3\opencv\mybuild\install\include

VC++目录-->库目录，添加： D:\opencv3\opencv\mybuild\install\x86\vc12\lib D:\opencv3\opencv\mybuild\install\x86\vc12\staticlib

链接器-->输入-->附加依赖项，添加：

opencv_bgsegm300d.lib opencv_bioinspired300d.lib opencv_calib3d300d.lib opencv_ccalib300d.lib opencv_core300d.lib opencv_datasets300d.lib opencv_face300d.lib opencv_features2d300d.lib opencv_flann300d.lib opencv_hal300d.lib opencv_highgui300d.lib opencv_imgcodecs300d.lib opencv_imgproc300d.lib opencv_latentsvm300d.lib opencvlinedescriptor300d.lib opencv_ml300d.lib opencv_objdetect300d.lib opencv_optflow300d.lib opencv_photo300d.lib opencv_reg300d.lib opencv_rgbd300d.lib opencv_saliency300d.lib opencv_shape300d.lib opencv_stereo300d.lib opencv_stitching300d.lib opencv_superres300d.lib opencvsurfacematching300d.lib opencv_text300d.lib opencv_tracking300d.lib opencv_ts300d.lib opencv_video300d.lib opencv_videoio300d.lib opencv_videostab300d.lib opencv_xfeatures2d300d.lib opencv_ximgproc300d.lib opencv_xobjdetect300d.lib opencv_xphoto300d.lib ippicvmt.lib