vs2008 + opencv + qt4.7.3 简单例程

本文参看网络资料总结。各个文件的配置参看网络资料

源码如下

#ifndef QTPLAY_H
#define QTPLAY_H

#include <QtGui/QMainWindow>
#include "ui_qtplay.h"
#include <QtGui/QPaintEvent>
#include <QtGui/QImage>
#include <QtCore/QTimer>
#include <QtGui/QPainter>
#include <QtCore/QPoint>

#include <cv.h>
#include <highgui.h>
class qtplay : public QMainWindow
{
Q_OBJECT
public:
qtplay(const char *filename,QWidget *parent = 0, Qt::WFlags flags = 0);
~qtplay();
protected :
void paintEvent(QPaintEvent *e);
private slots:
void nextFrame();
private:
Ui::qtplayClass ui;
CvCapture *capture;
IplImage *iplImg;
IplImage *frame;
QImage *qImg;
QTimer *timer;
};


#endif // QTPLAY_H

#include "qtplay.h"


qtplay::qtplay(const char *filename,QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
capture = cvCaptureFromFile(filename);
if (capture)
{
frame = cvQueryFrame(capture);
if (frame)
this ->resize(frame->width,frame->height);
qImg = new QImage(QSize(frame->width,frame->height),QImage::Format_RGB888);
iplImg = cvCreateImageHeader(cvSize(frame->width,frame->height),8,3);
iplImg->imageData = (char *)qImg->bits();
timer = new QTimer(this );
timer->setInterval(30);
connect(timer,SIGNAL(timeout()),this ,SLOT(nextFrame()));
timer->start();
}
ui.setupUi(this);
}


qtplay::~qtplay()
{
cvReleaseImage(&iplImg);
cvReleaseCapture(&capture);
delete qImg;
delete timer;
}


void qtplay::paintEvent(QPaintEvent *e)
{
QPainter painter(this );
painter.drawImage(QPoint(0,0),*qImg);
}


void qtplay::nextFrame()
{
frame = cvQueryFrame(capture);
if (frame)
{


if (frame->origin == IPL_ORIGIN_TL)
{
cvCopy(frame,iplImg,0);
}
else 
{
cvFlip(frame,iplImg,0);
}


cvCvtColor(iplImg,iplImg,CV_BGR2RGB);


this ->update();


}
}

#include "qtplay.h"
#include <QtGui/QApplication>


int main(int argc, char *argv[])
{
QApplication a(argc, argv);
char *filename = "../../TEST.AVI";
qtplay *mw = new qtplay(filename);
mw->show();


return a.exec();
}

在上述代码里面插入处理图像的代码就很简单了。显示图像的时候在构造函数里面就可以插入处理代码，当然 也可以在paintEvent函数里面进行处理，播放视频的时候可以在nextFrame函数里面进行处理，有些预处理可以在构造函数里面完成