opencv+qt+beaglebone 之获取摄像头数据。

#ifndef MAINWINDOW_H
#define MAINWINDOW_H


#include <QMainWindow>
#include <QLabel>
#include <QGridLayout>
#include <QPushButton>
#include <QComboBox>
#include <QImage>

//#include <core.hpp>
//#include <imgproc.hpp>
#include <highgui.h>
#include <cv.h>

class MainWindow  : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
    ~MainWindow();

private:
    QWidget* mainWindow;
    QGridLayout * mainLayout;
    QPushButton * buttonStart;
    QPushButton * buttonStop;
    QLabel * pictureCamera;
    QLabel * pictureProcess;
    
    CvCapture * pCapture;
    IplImage * pImage;

    void  paintEvent(QPaintEvent *event);
private slots :
    void startVideo();
    void stopVideo();
};

#endif

#include "mainwindow.h"
#include <QPainter>
#include <iostream>
#include <sstream>
#include <math.h>

using namespace std;

MainWindow :: MainWindow()
{
    mainWindow = new QWidget;

    this->setCentralWidget(mainWindow);


    buttonStart = new QPushButton("START");
    buttonStart->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed);
    buttonStop = new QPushButton("STOP");
    buttonStop->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed);
    pictureCamera = new QLabel();
    pictureProcess = new QLabel();

    pCapture = cvCreateCameraCapture(0);
    pImage = cvQueryFrame(pCapture);

    mainLayout = new QGridLayout;
        
    mainLayout->addWidget(buttonStart,0,0,1,1);
    mainLayout->addWidget(buttonStop,0,1,1,1);
    mainLayout->addWidget(pictureCamera,1,0,5,5);
    mainLayout->addWidget(pictureProcess,1,5,5,5);

    mainWindow->setLayout(mainLayout);

    QObject::connect(buttonStart,SIGNAL(clicked()),this,SLOT(startVideo()));
    QObject::connect(buttonStop,SIGNAL(clicked()),this,SLOT(stopVideo()));
    this->setWindowTitle("beaglebone opencv test~");
    this->resize(QSize(600,300));
    
   
}

MainWindow :: ~MainWindow()
{
    cvReleaseCapture(&pCapture);

    mainWindow->deleteLater();
    mainLayout->deleteLater();

    buttonStart->deleteLater();
    buttonStop->deleteLater();
    pictureCamera->deleteLater();
    pictureProcess->deleteLater();

}

void MainWindow::startVideo()
{
    pImage = cvQueryFrame(pCapture);   
    QImage showImage((const uchar *)pImage->imageData,pImage->width,pImage->height,QImage::Format_RGB888);
    pictureCamera->setPixmap(QPixmap::fromImage(showImage));
}

void MainWindow::stopVideo()
{
}

void MainWindow::paintEvent(QPaintEvent *event)
{

}

#include <QApplication>
#include <QFont>
#include "mainwindow.h"


int main(int argc ,char* argv[])
{
    QApplication app(argc,argv);
    MainWindow myWindow;
    myWindow.show();
    return app.exec();
}