所用QT版本:5.9.1
电脑配置:win10,64位系统
调用的是编译好的:OpenCV-MinGW-Build-4.1.0(点击链接进码云仓库)
在大学期间,由于项目需求需要用到QT+opencv进行编程。在网上看了一下,有很多介绍配置的方法的文章,大致有两种,一种是需要使用CMake对opencv进行编译,这种方法太复杂了,而且我在尝试中也是各种报错,各种尝试无果之后果断放弃了;
另一种是直接引用库函数,配置起来非常简单,我选择的配置方法是第二种。虽然第二种方法只有三四步的过程,网上也有很多教程,但是在我实际配置的过程中,遇到了很多麻烦,本来几分钟搞定的事情,我花了几天才完成,中途一度有过放弃。
这里简单介绍一下配置方法,提点一下特别需要主要的细节。
1、新建一个项目(注意英文路径)
2、在pro文件内加入代码(完整如下):
#-------------------------------------------------## Project created by QtCreator 2021-11-04T19:23:51##-------------------------------------------------QT += core guigreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = A_1TEMPLATE = app# The following define makes your compiler emit warnings if you use# any feature of Qt which as been marked as deprecated (the exact warnings# depend on your compiler). Please consult the documentation of the# deprecated API in order to know how to port your code away from it.DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if you use deprecated APIs.# In order to do so, uncomment the following line.# You can also select to disable deprecated APIs only up to a certain version of Qt.#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0SOURCES += \ main.cpp \ mainwindow.cppHEADERS += \ mainwindow.hFORMS += \ mainwindow.uiINCLUDEPATH += D:/RJDZ/OpenCV-MinGW-Build-4.1.0/include\ D:/RJDZ/OpenCV-MinGW-Build-4.1.0/include/opencv2LIBS += D:/RJDZ/OpenCV-MinGW-Build-4.1.0/x86/mingw/lib/libopencv_*.dll.a3、在ui界面随便拖入的几个QPushButton,修改objectName :

4、在 mainwindow.h 头文件中加入:
#include <QMainWindow>#include <opencv2/opencv.hpp>完整如下:
#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <opencv2/opencv.hpp>using namespace cv;namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{ Q_OBJECTpublic: explicit MainWindow(QWidget *parent = 0); int num = 0; ~MainWindow();private: Ui::MainWindow *ui;};#endif // MAINWINDOW_H5、main.cpp 保持不变 :
#include "mainwindow.h"#include <QApplication>int num=0;int main(int argc, char *argv[]){ QApplication a(argc, argv); MainWindow w; w.show(); return a.exec();}6、在 mainwindow.cpp 中加入以下头文件 :
#include <opencv2/core/core.hpp>#include <opencv2/highgui/highgui.hpp>#include <opencv2/imgproc/imgproc.hpp>完整代码以及功能定义 :
#include "mainwindow.h"#include "ui_mainwindow.h"#include "QDebug"#include <opencv2/core/core.hpp>#include <opencv2/highgui/highgui.hpp>#include <opencv2/imgproc/imgproc.hpp>MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow){ ui->setupUi(this); connect(ui->en1,&QPushButton::clicked,[=](){ qDebug()<<"打开图片" ; Mat image=imread("D:/pp/2.jpg");//一定要使用绝对路径,其他可以回报错 //namedWindow( "Display window”, WINDOW_AUTOSIZE "); imshow( "Display window", image ); qDebug()<<"num:"<<num<<endl; }); connect(ui->video,&QPushButton::clicked,[=](){ VideoCapture cap(0); Mat imgs; while (true) { num=0; cap.read(imgs); flip(imgs,imgs,1); imshow("Video",imgs); waitKey(1); if(num==1){ break; } } }); connect(ui->V_off,&QPushButton::clicked,[=](){ num=1; }); connect(ui->off,&QPushButton::clicked,[=](){ parent->close(); close(); });}MainWindow::~MainWindow(){ delete ui;}可以看到,能够正常运行:

各功能都可以正常使用:
、
以上,配置完成!