QT+OPENCV摄像头的三种效果显示
opencv在window下的qt的mingw库需要自己编译，注意高版本的opencv可能不包含mingw，而本次采用的是OpenCV-2.4.3版，然后用cmake工具进行编译。参考链接：http://blog.csdn.net/qiurisuixiang/article/details/8665278/
QT_XCT.pro //工程文件
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = QT_XCT
TEMPLATE = app
DEFINES += QT_DEPRECATED_WARNINGS
SOURCES += main.cpp\
mainwindow.cpp \
login.cpp
HEADERS += mainwindow.h \
login.h
FORMS += mainwindow.ui \
login.ui
RESOURCES += \
src/image.qrc
INCLUDEPATH+=C:\OpenCV\include\opencv\
C:\OpenCV\include\opencv2\
C:\OpenCV\include
LIBS+=C:\OpenCV\lib\libopencv_calib3d243.dll.a\
C:\OpenCV\lib\libopencv_contrib243.dll.a\
C:\OpenCV\lib\libopencv_core243.dll.a\
C:\OpenCV\lib\libopencv_features2d243.dll.a\
C:\OpenCV\lib\libopencv_flann243.dll.a\
C:\OpenCV\lib\libopencv_gpu243.dll.a\
C:\OpenCV\lib\libopencv_highgui243.dll.a\
C:\OpenCV\lib\libopencv_imgproc243.dll.a\
C:\OpenCV\lib\libopencv_legacy243.dll.a\
C:\OpenCV\lib\libopencv_ml243.dll.a\
C:\OpenCV\lib\libopencv_objdetect243.dll.a\
C:\OpenCV\lib\libopencv_video243.dll.a
mainwindow.h //头文件
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "opencv2/opencv.hpp"
#include
#include
using namespace cv;
using namespace std;
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void delSignal(int);
void getview1();
void getview2();
void getview3();
public slots:
void on_btn_normal_clicked();
void on_btn_border_clicked();
void on_btn_heibai_clicked();
signals:
void mySignal(int);
private:
Ui::MainWindow *ui;
Mat srcImage;
VideoCapture videoCap;
// QLabel *imageLabel;
// QProcess m_process;
QWindow *m_window;
QWidget *m_widget;
WId wid;
char c;
};
#endif // MAINWINDOW_H
mainwindow.cpp//源文件
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
#include
#include
#include
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
setWindowTitle("XCT");
setWindowIcon(QIcon("qrc:/new/prefix1/logo.jpg"));
resize(587,455);
m_window=NULL;
m_widget=NULL;
connect(this,&MainWindow::mySignal,this,&MainWindow::delSignal);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::delSignal(int sig)
{
switch(sig)
{
case 100:
destroyWindow("normal");
getview1();
break;
case 101:
destroyWindow("normal");
getview2();
break;
case 102:
destroyWindow("normal");
getview3();
break;
defalut:
break;
}
}
void MainWindow::getview1()
{
//启动一个外部可执行程序
/*
QString cmd = QString("C:/WINDOWS/system32/calc.exe");
m_process.start(cmd,QStringList()<<"");
if(!m_process.waitForFinished(3000))
{
qDebug()<<"--------";
}
Sleep(200);
*/
// if(imageLabel!=NULL)
// {
// ui->verticalLayout->removeWidget(imageLabel);
// }
// imageLabel = new QLabel(this);
int i = 0;
VideoCapture inputVideo(0); //0为外部摄像头的ID，1为笔记本内置摄像头的ID
namedWindow("normal");
wid=(WId)FindWindow(L"Main HighGUI class",NULL);
m_window = QWindow::fromWinId(wid);
m_widget = QWidget::createWindowContainer(m_window);
ui->mdiArea->addSubWindow(m_widget);
m_widget->setMaximumSize(423,323);
m_widget->showMaximized();
while(1)
{
inputVideo >> srcImage;
if(srcImage.empty() & i > 0) return;
if(i > 0)
{
imshow("normal",srcImage);
// QImage image2 = QImage((uchar*)(srcImage.data), srcImage.cols, srcImage.rows, QImage::Format_RGB888);
// imageLabel->setPixmap(QPixmap::fromImage(image2));
// imageLabel->resize(361,291);
// ui->verticalLayout->addWidget(imageLabel);
}
i ++;
c=(char)waitKey(10);
if (c==27)
{
c=0;
break;
}
}
}
void MainWindow::getview2()
{
Mat src;
// if(imageLabel!=NULL)
// {
// ui->verticalLayout->removeWidget(imageLabel);
// }
// imageLabel = new QLabel(this);
char c;
int i = 0;
VideoCapture inputVideo(0); //0为外部摄像头的ID，1为笔记本内置摄像头的ID
namedWindow("normal");
wid=(WId)FindWindow(L"Main HighGUI class",NULL);
m_window = QWindow::fromWinId(wid);
m_widget = QWidget::createWindowContainer(m_window);
ui->mdiArea->addSubWindow(m_widget);
m_widget->setMaximumSize(423,323);
m_widget->showMaximized();
while(1)
{
inputVideo >>srcImage;
if(srcImage.empty() & i > 0) return;
if(i > 0)
{
cvtColor(srcImage,src, CV_BGR2GRAY);
GaussianBlur(src, src, Size(7,7), 1.5, 1.5);
Canny(src, src, 0, 20, 3);
imshow("normal",src);
// QImage image2= QImage((uchar*)(srcImage.data), srcImage.cols, srcImage.rows, QImage::Format_RGB888);
// imageLabel->setPixmap(QPixmap::fromImage(image2));
// imageLabel->resize(361,291);
// ui->verticalLayout->addWidget(imageLabel);
}
i ++;
c=(char)waitKey(10);
if (c==27)
{
c=0;
break;
}
}
}
void MainWindow::getview3()
{
// if(imageLabel!=NULL)
// {
// ui->verticalLayout->removeWidget(imageLabel);
// }
// imageLabel = new QLabel(this);
Mat src;
char d;
int i = 0;
VideoCapture inputVideo(0); //0为外部摄像头的ID，1为笔记本内置摄像头的ID
namedWindow("normal");
wid=(WId)FindWindow(L"Main HighGUI class",NULL);
m_window = QWindow::fromWinId(wid);
m_widget = QWidget::createWindowContainer(m_window);
ui->mdiArea->addSubWindow(m_widget);
m_widget->setMaximumSize(423,323);
m_widget->showMaximized();
while(1)
{
inputVideo >> srcImage;
if(srcImage.empty() & i > 0) return;
if(i > 0)
{
cvtColor(srcImage,src, CV_BGR2GRAY);
imshow("normal",src);
// QImage image2 = QImage((uchar*)(srcImage.data), srcImage.cols, srcImage.rows, QImage::Format_RGB888);
// imageLabel->setPixmap(QPixmap::fromImage(image2));
// imageLabel->resize(361,291);
// ui->verticalLayout->addWidget(imageLabel);
}
i ++;
c=(char)waitKey(10);
if (c==27)
{
c=0;
break;
}
}
}
//正常显示
void MainWindow::on_btn_normal_clicked()
{
emit mySignal(100);
}
//轮廓显示
void MainWindow::on_btn_border_clicked()
{
emit mySignal(101);
}
//黑白显示
void MainWindow::on_btn_heibai_clicked()
{
emit mySignal(102);
}