qt + openCV test program

Reference: https: //www.jianshu.com/p/c244c9d01fe0

Many of which are in front of copy, install qt cmake / opencv I will not explain the above sites have introduced

Compile OpenCV

Run cmake-gui.exe, were selected and compile source path of the output path OpenCV

 

Click Configure, configured as follows, and then next

 

 Compiler path configuration, then finish

C: C:/Qt/Qt5.11.1/Tools/mingw530_32/bin/gcc.exe
C++: C:/Qt/Qt5.11.1/Tools/mingw530_32/bin/g++.exe

 

 After the first configure complete, check WITH_QT and WITH_OPENGL, click configure again

 

 After the second configure complete, CMAKE_BUILD_TYPE modified to Release, click configure again

 

 After the third configure complete, click generate, after the end of generation, open cmd, enter the build output directory, the compiler instruction execution (-j represents a multi-threaded job, the computer is a few core CPU, the latter parameter can be set to how much you can to save compilation time)

d:
cd OpenCV
cd build-Qt
mingw32-make -j 4
mingw32-make install

The above question, please refer to the above URL.

Here is the test code:

QWindow a new project called TestOpenCV, modify the project configuration file TestOpenCV.pro, at the end of the file contains the file path and increase the required library files

INCLUDEPATH += D:\openCV\opencv\build\include

LIBS += D:\openCV_out\lib\libopencv_*.a

根据自己实际情况找一下。大佬的网址写的是添加的.dll，应该换成.a文件

在mainwindow.cpp中

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // read an image
    cv::Mat image = cv::imread("D:\\1.jpg", 1);
    // create image window named "My Image"
    cv::namedWindow("My Image");
    // show the image on window
    cv::imshow("My Image", image);
}

MainWindow::~MainWindow()
{
    delete ui;
}

上面参考的网站中大佬的文件路径写错了，导致程序崩溃。

主要是大佬的思路，我只是略做修改，感谢大佬的分享。