Qt 配置 OpenCV

MinGW

CMake

下载 OpenCV 源代码

使用 CMake 生成 OpenCV 的 Makefile

1. // 设置源码 Where is the source code:
   C:\Program Files\OpenCV\source
   // 生成路径
   C:\Program Files\OpenCV\build
   

2. 点击 Configure，设置编译器

3. Specify the generator for this project: MinGW Makefiles

4. Specify native compilers

5. Next

6. Compilers C: C:\Qt\Tools\mingw1120_64\bin\gcc.exe

7. Compilers C++: C:\Qt\Tools\mingw1120_64\bin\g++.exe

8. Finish

9. 编译配置：

   1. CMAKE_build_type Release
      build_opencv_world 勾选 
      WITH_OPENGL 勾选 
      WITH_QT	勾选 
      WITH_OPENCL_D3D11_NV 不勾选 
      ENABLE_PRECOMPILED_HEADERS 不勾选 
      WITH_IPP 不勾选 
      python 不勾选 
      BUILD_JAVA 不勾选 
      

10. 点击 Configure，Generate 生成 Makefile

编译 OpenCV

cd C:\Program Files\OpenCV\build
mingw32-make -j 16
mingw32-make install

Qt 使用 CMake 构建 文件末尾添加如下内容

# 指向 OpenCV 的安装路径
set(OPENCV_HOME "C:/Program Files/OpenCV/build")

# 将 OpenCV 的头文件路径添加到项目中
include_directories(${OPENCV_HOME}/include)

# 设置 OpenCV 库文件的位置
set(OpenCV_LIB_DIR ${OPENCV_HOME}/x64/mingw/lib)

# 查找 OpenCV 库文件
find_library(OpenCV_LIBS NAMES opencv_world490 PATHS ${OpenCV_LIB_DIR} REQUIRED)

# 将 OpenCV 库链接到你的目标
target_link_libraries(OpenCVQt PRIVATE ${OpenCV_LIBS})

来一段测试代码 将代码放入 main.cpp 文件中即可

#include <QApplication>
#include <opencv2/opencv.hpp>

#include "widget.h"

int main(int argc, char *argv[]) {
    cv::Mat img = cv::imread("C:/Code/OpenCVQt/lena.jpg");
    cv::imshow("img", img);
    cv::waitKey(0);
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}