qt读取摄像头-526互联

Qt中实时调取摄像头(利用OpenCV)_opencv获取网络摄像头 qt_Loading_create的博客-CSDN博客

C++版本
#include <opencv2/opencv.hpp>

#include "mainwindow.h"

using namespace std;

using namespace cv;

#undef main

 int  main(){

    Mat image;

    VideoCapture cap(0);

    //cap.open(0);

    while (1){

        cap>>image;

        imshow("1232",image);

        if(waitKey(30)>=0) break;

    return 0;

}

opencv版本

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <opencv2/opencv.hpp>

#include <QTimer>

#include <QLabel>

#include <QPushButton>

using namespace cv;

class MainWindow : public QMainWindow

    Q_OBJECT

public:

    MainWindow(QWidget *parent = 0);

    ~MainWindow();

private:

    Mat video_image;

    VideoCapture cap;

    QTimer *label_update;

    int flag=0;

    QLabel *label;

    QPushButton *pushButton;

private slots:

    void pushButtonClicked();

    void video_update();

};

#endif // MAINWINDOW_H

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

    this->setGeometry(0,0,800,480);

    label=new QLabel(this);

    label->setGeometry(0,0,300,300);

    label->setStyleSheet("QLabel { "> #f8f8f8; border-width: 2px; border-style: solid; border-color: #4B91E5; }");

    pushButton=new QPushButton(this);

    pushButton->setGeometry(0,320,100,30);

    pushButton->setText("打开摄像头");

    label_update=new QTimer();

    connect(label_update,SIGNAL(timeout()),this,SLOT(video_update()));

    connect(pushButton,SIGNAL(clicked()),this,SLOT(pushButtonClicked()));

MainWindow::~MainWindow()

void MainWindow::video_update()

    cap>>video_image;

    cvtColor(video_image,video_image,COLOR_BGR2RGB);

    label->setPixmap(QPixmap::fromImage(QImage(video_image.data,video_image.cols,video_image.rows,QImage::Format_RGB888)));

void MainWindow::pushButtonClicked()

    if(flag==0)

        cap.open(0);

        label_update->start(30);

        flag++;

        pushButton->setText("CLOSE");

    else

        label_update->stop();

        cap.release();

        label->clear();

        pushButton->setText("open");

        flag=0;