QT5.6+OpenCV3.4.1+CMake编译

1.安装QT5.6，在安装时记得勾选上mingw。

2.安装CMake3.11.1

CMake下载地址：https://cmake.org/download/

选择源文件和目标目录

点击configure，选择

选择编译器：

在配置过程中可能存在一直卡在：FFMPEG: Download: opencv_ffmpeg.dll这，先点击stop，在点击配置就好了

不行的话多等待一会。

等待配置完成后，勾选opengl和QT

然后点击configure，这时会报错，我们修改qmake的路径和lib库，如图所示：

再次点击configure，报错，修改opengl路径，：

最后一步，直接点击：Generate：出现Generating done，表示完成Makefile的创建

接下来，cmd切换到目标目录，比如我这是：C:\Users\11011430\Desktop\opencv\BD

输入命令：mingw32-make进行编译。

编译过程中出现的问题：

1.tubs\io_win32.cc:94:3: warning: identifier 'nullptr' is a keyword in C++11

解决方法：勾选上C++11支持，重新Generating

28%左右遇到这种错误：
... windres.exe: unknown option -- W ...

解决方案：
在cmake中取消勾选 ENABLE_PRECOMPILED_HEADERS

32%左右遇到这种错误：

'sprintf_instead_use_StringCbPrintfA_or_StringCchPrintfA' was not declared in this scope ...

解决方案：

在..\opencv\sources\modules\videoio\src\cap_dshow.cpp

在#include "DShow.h"这一行前加上#define NO_DSHOW_STRSAFE

在mingw32-make完成之后，使用mingw32-make install进行安装

新建文件夹qt-opencv，将C:\Users\11011430\Desktop\opencv\build 下面的include文件夹和安装目标文件下面的lib，bin文件夹拷贝到qt-opencv

然后新建QT空项目，添加main.cpp，修改.pro文件：

SOURCES += \
    main.cpp
INCLUDEPATH+=C:\Users\11011430\Desktop\opencv-qt\include\opencv\
            C:\Users\11011430\Desktop\opencv-qt\include\opencv2\
            C:\Users\11011430\Desktop\opencv-qt\include

LIBS+=C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_calib3d_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_calib3d341.dll.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_core_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_core341.dll.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_dnn_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_dnn341.dll.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_features2d_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_features2d341.dll.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_flann_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_flann341.dll.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_highgui_pch_dephelp.a\
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_highgui341.dll.a \
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_imgcodecs_pch_dephelp.a \
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_imgcodecs341.dll.a \
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_imgproc_pch_dephelp.a \
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_imgproc341.dll.a \
      C:\Users\11011430\Desktop\opencv-qt\lib\libopencv_ml_pch_dephelp.a

main.cpp文件为：

#include"cv.h"
#include"cxcore.h"
#include"highgui.h"



int main(int argc,char* argv[])

{

    //声明IplImage指针
    IplImage*pImg;
    //载入图片
    pImg=cvLoadImage("F:1.jpg",1);
    //创建窗口
    cvNamedWindow("Image",1);
    //显示图像
    cvShowImage("Image",pImg);
    //等待按键
    cvWaitKey(0);
    //销毁窗口
    cvDestroyWindow("Image");
    //释放图像
    cvReleaseImage(&pImg);
    return 0;
}

运行，测试成功，在测试中只是加入了部分库文件，在实际开发中自行添加。附上添加全部库的小工具：

https://download.csdn.net/download/qq_31208451/10398028

测试图，哈哈。。。。

QT5.6+OpenCV3.4.1+CMake编译

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