下载opencv

下载链接： https://opencv.org/releases/ 如： opencv-4.3.0-vc14_vc15.exe

运行exe

运行exe（其实是解压），将压缩包解压到相应目录，如： D:\ 解压后会生成opencv文件夹。 其中build是OpenCV使用时要用到的一些库文件，而sources中则是OpenCV官方为我们提供的一些demo示例源码

Win+VS

添加环境变量

根据安装目录新建环境变量：

此电脑 - 属性 - 高级系统设置 - 高级 - 环境变量 - 系统变量(s) - path - 双击 - 新建 - D:\opencv\build\x64\vc15\bin

测试opencv

新建vs2019工程

如 ：Test。

添加静态库和动态库

解决方案管理器 - Test - 右键 - 属性 - 配置属性 - VC++目录 - 平台（x64）

包含目录(Include Directories) - D:\opencv\build\include 和 D:\opencv\build\include\opencv2库目录(Library Directories) - D:\opencv\build\x64\vc15\lib

添加动态连接器

打开D:\opencv\build\x64\vc15\lib，会看到里边有连接器opencv_world430d.lib，然后，

解决方案管理器 - Test - 右键 - 属性 - 配置属性 - 链接器 - 输入 - 平台（x64） - 附加依赖项 - opencv_world430d.lib 这一步和include是等价的。

确定。

样例

vs2019 Debug x64 环境

#include<iostream> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> using namespace cv; int main() { // 读入一张图片（游戏原画） Mat img = imread("C://Users//Administrator//Desktop//test.jpg"); if (img.empty()) { std::cout << "No image! Maybe the image path is wrong!" << std::endl; int i; std::cin >> i; return 0; } // 创建一个名为 "游戏原画"窗口 namedWindow("游戏原画"); // 在窗口中显示游戏原画 imshow("游戏原画", img); // 等待6000 ms后窗口自动关闭 waitKey(0); }

弹出图片就对了！

Win+MinGW

如果QT用的编译器是MinGW，那么则无法编译.lib后缀的库文件，所以需要准备.a后缀的opencv库文件。opencv244版本带有mingw的库文件，但opencv2410以后则没有了。

安装QT

QT需要的两个模块： Qt-Qt5.9-MingGW 5.3.0 32 bit Qt-Tools-MinGW 5.3.0

安装cmkake

略

安装opencv

步骤如开始部分。

添加环境变量

D:\Qt\Qt5.14.2\Tools\mingw730_64\bin D:\Qt\Qt5.14.2\5.14.2\mingw73_64\bin

编译opencv

打开cmake

Where is the source code: D:\opencv\sources where to build the binaries: D:\opencv-build

点击 Configure,Yes，选择下列设定:

Specify the generator for this project: MinGW Makefiles Specify native compilers, next Compilers C: D:/Qt/Qt5.14.2/Tools/mingw730_64/bin/gcc.exe Compilers C++: D:/Qt/Qt5.14.2/Tools/mingw730_64/bin/g++.exe Finish set Qt5_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5 Check the box [X]WITH_QT Check the box [X]WITH_OPENGL

点config

Set QT_MAKE_EXECUTABLE to D:\Qt\5.9\mingw53_32\bin\qmake.exe Set Qt5Concurrent_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5Concurrent Set Qt5Core_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5Core Set Qt5Gui_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5Gui Set Qt5Test_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5Test Set Qt5Widgets_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5Widgets Set Qt5OpenGL_DIR to D:\Qt\5.9\mingw53_32\lib\cmake\Qt5OpenGL Set CMAKE_BUILD_TYPE to Release or RelWithDebInfo Set OPENCV_VS_VERSIONINFO_SKIP=1 Uncheck the box []ENABLE_PRECOMPILED_HEADERS

点config

点generate

然后编译：

d: cd d:\ cd opencv-build mingw32-make -j 8 mingw32-make install

mingw32-make -j 8时如果编译出错：

gcc: error: long: No such file or directory C:\mingw64\bin\windres.exe: preprocessing failed. mingw32-make[2]: *** [modules\core\CMakeFiles\opencv_core.dir\build.make:1506: modules/core/CMakeFiles/opencv_core.dir/vs_version.rc.obj] Error 1 mingw32-make[2]: *** Waiting for unfinished jobs.... mingw32-make[1]: *** [CMakeFiles\Makefile2:2237: modules/core/CMakeFiles/opencv_core.dir/all] Error 2 mingw32-make: *** [Makefile:179: all] Error 2

解决方法，在cmake选项中取消该选项：

Uncheck the box []OPENCV_ENABLE_ALLOCATOR_STATS

添加Opencv编译库到环境变量

D:\opencv-build\install\x86\mingw\bin

测试

.pro文件中添加,注意修改文件路径和库名：

INCLUDEPATH += D:\opencv\build\include LIBS += D:\opencv-build\bin\libopencv_*.dll #LIBS += D:\opencv-build\bin\libopencv_core320.dll #LIBS += D:\opencv-build\bin\libopencv_highgui320.dll #LIBS += D:\opencv-build\bin\libopencv_imgcodecs320.dll #LIBS += D:\opencv-build\bin\libopencv_imgproc320.dll #LIBS += D:\opencv-build\bin\libopencv_features2d320.dll #LIBS += D:\opencv-build\bin\libopencv_calib3d320.dll # more correct variant, how set includepath and libs for mingw # add system variable: OPENCV_SDK_DIR=D:/opencv/opencv-build/install # read http://doc.qt.io/qt-5/qmake-variable-reference.html#libs #INCLUDEPATH += $$(OPENCV_SDK_DIR)/include #LIBS += -L$$(OPENCV_SDK_DIR)/x86/mingw/lib \ # -lopencv_core320 \ # -lopencv_highgui320 \ # -lopencv_imgcodecs320 \ # -lopencv_imgproc320 \ # -lopencv_features2d320 \ # -lopencv_calib3d320

main.cpp

#include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> int main() { // read an image cv::Mat image = cv::imread("C://Users//Administrator//Desktop//timg.jpg", 1); // create image window named "My Image" cv::namedWindow("My Image"); // show the image on window cv::imshow("My Image", image); cv::waitKey(0); return 0; }

MAC+Qt

Mac下只能使用Xcode进行构建。

可以使用brew install opencv进行安装opencv，但是github总是被墙，因此使用码云上的opencv源码来构建opencv。

下载opencv源码，打开cmake:

Where is the source code: /Users/cdq/thirdLibrary/opencv where to build the binaries: /Users/cdq/thirdLibrary/opencv-build

点击config

再点击config

点generate

cd /Users/cdq/thirdLibrary/opencv make -j 8 sudo make install

安装后的位置是： /usr/local/include，/usr/local/lib，/usr/local/share和/usr/local/bin

.pro文件

INCLUDEPATH +=/usr/local/include/opencv4/ LIBS += /usr/local/lib/libopencv_*.dylib #LIBS += /usr/local/lib/libopencv_core.dylib #LIBS += /usr/local/lib/libopencv_highgui.dylib #LIBS += /usr/local/lib/libopencv_imgcodecs.dylib #LIBS += /usr/local/lib/libopencv_imgproc.dylib

main.cpp文件

#include <QApplication> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/opencv.hpp> using namespace cv; //包含cv命名空间 int main( ) { Mat srcImage = imread("/Users/cdq/Desktop/124.jpg"); //载入图像 imshow("【原始图】",srcImage);//显示图像 waitKey(0);//按任意键退出 return 0; }

需要注意的是：运行成功后，图片总是以最小化显示，而不是直接弹出，导致我一度以为没有正常运行！

参考链接： https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows https://blog.csdn.net/duwangthefirst/article/details/79452314 https://blog.csdn.net/maizousidemao/article/details/81474834 https://blog.csdn.net/u012435142/article/details/82952302