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)+".webp";
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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