基于Qt OpenCV实现图像数据采集软件

效果图

示例代码

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include<QTimer>
#include<QDebug>
#include<QDateTime>
#include<opencv2/opencv.hpp>

using namespace cv;
using namespace std;

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
  Q_OBJECT

public:
  Widget(QWidget *parent = nullptr);
  ~Widget();

private slots:
  void updateLabel();//刷新label
  void on_button_getimage_start_clicked();

  void on_button_getimage_end_clicked();

  void on_button_opencapture_clicked();

private:
  Ui::Widget *ui;
  VideoCapture capture;
  QTimer *updatetimer;//视频刷新定时器
  Mat src;
  QImage image_src;
  bool saveflag;
  int i=0;
};
#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
  : QWidget(parent)
  , ui(new Ui::Widget)
{
  ui->setupUi(this);
  saveflag=false;
  this->setWindowTitle("image capturer");
  //关于刷新
  updatetimer=new QTimer(this);
  connect(updatetimer,&QTimer::timeout,this,&Widget::updateLabel);
}

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

//视频刷新
void Widget::updateLabel()
{
  if(!capture.isOpened())
  {
      qDebug()<<"capture error!";
      return;
  }
  else
  {
      capture>>src;
      if(src.empty())
      {
          qDebug()<<"src is empty!";
          return;
      }
      else
      {
          if(saveflag)
          {
              QDateTime now_time = QDateTime::currentDateTime();
              QString file_n_qstr="D:\\image_get\\cup\\"+now_time.toString("yyyyMMddhhmmss")+QString::number(i)+".jpg";
              string file_n_str=file_n_qstr.toStdString();
              imwrite(file_n_str,src);
              qDebug()<<file_n_qstr;
              i++;
              //save
          }
          //原图
          image_src =QImage((const unsigned char*)(src.data),src.cols,src.rows,src.cols*src.channels(),QImage::Format_BGR888);
          ui->label_show->setPixmap(QPixmap::fromImage(image_src));
      }
  }
}

void Widget::on_button_getimage_start_clicked()
{
  qDebug()<<"on_button_getimage_start_clicked";
  saveflag=true;
}

void Widget::on_button_getimage_end_clicked()
{
  qDebug()<<"on_button_getimage_end_clicked";
  saveflag=false;
}

void Widget::on_button_opencapture_clicked()
{
  qDebug()<<"start button is clicked";

  capture.open(0);
  if(!capture.isOpened())
  {
      qDebug()<<"open capture failed!";
  }
  else
  {
      updatetimer->start(30);
      qDebug()<<"open capture success!";
  }
}

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原文链接：https://blog.csdn.net/visual_eagle/article/details/125569682