opencv读取多个摄像头并保存当前视频流图片

最新推荐文章于 2023-02-11 21:39:28 发布

qq_32039433

最新推荐文章于 2023-02-11 21:39:28 发布

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分类专栏： c++ opencv qt 文章标签： c++ opencv qt

本文链接：https://blog.youkuaiyun.com/qq_32039433/article/details/77945049

这段代码演示了如何利用OpenCV在Qt环境下打开多个摄像头，并实时显示视频流。当用户点击按钮时，程序会抓取当前帧并将其保存为图片。此外，还提供了将OpenCV的Mat转换为QImage的功能，以便在Qt界面中显示。

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <ctime>
#include <QDebug>
#include <string.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{

capture();

}
int MainWindow::capture(){

    //initialize and allocate memory to load the video stream from camera
    cv::VideoCapture camera0;
    camera0.open(0);
    camera0.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera0.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera1;
    camera1.open(1);
    camera1.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera1.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera2;
    camera2.open(2);
    camera2.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera2.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera3;