Qt5.14.2+mingw64编译OpenCV3.4.14一次成功记录

上一文中编译opencv4.5成功了，但是使用过程中没有成功，网上很多的代码没法跑起来，所以才有了此文来编译一个低版本的opencv3的过程记录，全程截图。

一、软件安装

1.1 Python3.8版本安装路径:C:\Users\Administrator\AppData\Local\Programs\Python\Python38-32

1.2 QT安装路径:C:\Qt\Qt5.14.2

1.3 OpenCV安装包：opencv-3.4.14-vc14_vc15.exe,解压路径D:\opencv3414

1.3 CMake版本：cmake-3.24.0安装路径:C:\Program Files\CMake

1.4 Jdk安装路径:C:\Program Files\Java\jdk-18.0.1

二、path环境变量新增下列选项

C:\Program Files\CMake\bin;

D:\opencv3414\build\x64\vc15\bin;

C:\Qt\Qt5.14.2\5.14.2\mingw73_64\bin;

C:\Qt\Qt5.14.2\Tools\mingw730_64\bin

三、打开CMake软件进行mingw64位配置

点击 Configure，设置编译器为MinGW Makefiles

Specify the generator for this project: MinGW Makefiles

Specify native compilers

Compilers C: C:/Qt/Qt5.14.2/Tools/mingw730_64/bin/gcc.exe

Compilers C++: C:/Qt/Qt5.14.2/Tools/mingw730_64/bin/g++.exe

Finish

设置源码位置：D:\opencv\sources

设置生成项目位置：D:\opencv\build_mingw

点击Config按钮，运行成功。

四、进行Cmake选项的配置，选项设置如下：

点击Add Entry按钮

新增OPENCV_VS_VERSIONINFO_SKIP，类型BOOL 取值1

新增 CMKAE_BUILD_TYPE，类型string 取值release

其他选项勾选如下：

BUILD_SHARED_LIBS 勾选

WITH_OPENGL 勾选

WITH_QT 不勾选

OPENCV_ENABLE_ALLOCATOR_STATS 不勾选

WITH_OPENCL_D3D11_NV 不勾选

BUILD_opencv_world NO

OPENCV_GENERATE_SETUPVARS NO

OPENCV_ENABLE_ALLOCATOR_STATS NO

BUILD_SHARED_LIBS 勾选

Qt5_DIR C:\Qt\Qt5.14.2\5.14.2\mingw73_64\lib\cmake\Qt5

五、开始菜单选择QT5.14.2下的mingw64菜单执行进入对应窗口.C:\Qt\Qt5.14.2\5.14.2\mingw73_64>

5.1 cd命令切换到要编译的源码目录下：cd D:\opencv3414\build_mingw64

5.2 执行mingw32-make -j 8命令，完成100%后

5.3 再执行安装命令mingw32-make install

六、完成后新建QT项目测试

6.1拷贝生成的目录D:\opencv3414\build_mingw64\install目录下的include和x64目录到新建的项目目录下

6.2项目.pro文件中新增如下代码

#添加64位mingw+opencv3.4.14库的引用

复制代码

INCLUDEPATH += $$PWD/../opencv/include \
               $$PWD/../opencv/include/opencv \
               $$PWD/../opencv/include/opencv2 \
               $$PWD/../opencv/x64/mingw
DEPENDPATH +=  $$PWD/../opencv/x64/mingw
LIBS +=        $$PWD/../opencv/x64/mingw/bin/libopencv_calib3d3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_core3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_dnn3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_features2d3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_flann3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_highgui3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_imgcodecs3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_imgproc3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_ml3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_objdetect3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_photo3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_shape3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_stitching3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_superres3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_video3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_videoio3414.dll \
               $$PWD/../opencv/x64/mingw/bin/libopencv_videostab3414.dll

6.3 main.cpp文件中修改如下代码进行测试

复制代码

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    cv::Mat image = cv::imread("2025-03-31_232450.png");
    if (image.empty()) {
        std::cerr << "Could not open or find the image!" << std::endl;
        return -1;
    }
    cv::imshow("Display window", image);
    cv::waitKey(0);
}

七、程序运行，测试OK