qt 使用QCamera 实现简单的摄像头使用
qt 自带的摄像头QCamera可简单实现摄像头监控,话不多说,直接上代码!自己写的测试代码!
源码:
pro文件
#-------------------------------------------------
#
# Project created by QtCreator 2017-12-08T14:36:05
#
#-------------------------------------------------
QT += core gui
QT += multimedia
QT += multimediawidgets
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = QCameraTest
TEMPLATE = app
SOURCES += main.cpp\
widget.cpp
HEADERS += widget.h
.h文件
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
class QCamera;
class QCameraViewfinder;
class QCameraImageCapture;
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = 0);
~Widget();
private slots:
void exitBtnResponded();
void cameraImageCaptured(int,QImage);
private:
QCamera* m_pCamera; //读取摄像头
QCameraViewfinder* m_pViewfinder; //渲染摄像头
QCameraImageCapture* m_pImageCapture; //获取摄像头当前帧
};
#endif // WIDGET_H
.cpp文件
#include "widget.h"
#include <QLayout>
#include <QLabel>
#include <QPushButton>
#include <QFileDialog>
#include <QCamera>
#include <QCameraViewfinder>
#include <QCameraImageCapture>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
setWindowTitle("QCamera");
m_pCamera = new QCamera(this);
m_pViewfinder = new QCameraViewfinder(this);
m_pImageCapture = new QCameraImageCapture(m_pCamera);
QPushButton* button1 = new QPushButton("Capture");
QPushButton* button2 = new QPushButton("Exit");
QVBoxLayout *mainLayout = new QVBoxLayout(this);
mainLayout->addWidget(m_pViewfinder);
mainLayout->addWidget(button1);
mainLayout->addWidget(button2);
connect(button1, SIGNAL(clicked()), m_pImageCapture, SLOT(capture()));
connect(button2, SIGNAL(clicked()), this, SLOT(exitBtnResponded()));
connect(m_pImageCapture, SIGNAL(imageCaptured(int,QImage)), this, SLOT(cameraImageCaptured(int,QImage)));
m_pImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToFile);
m_pCamera->setCaptureMode(QCamera::CaptureStillImage);
m_pCamera->setViewfinder(m_pViewfinder);
m_pCamera->start();
}
Widget::~Widget()
{
delete m_pCamera;
delete m_pViewfinder;
delete m_pImageCapture;
}
void Widget::exitBtnResponded()
{
m_pCamera->stop();
close();
}
void Widget::cameraImageCaptured(int, QImage image)
{
QString savepath = QFileDialog::getSaveFileName(this,"Save Capture","Capture","Image png(*.png);;Image jpg(*.jpg);;Image bmp(*.bmp)");
if(!savepath.isEmpty()){
image.save(savepath);
}
}
完整项目下载地址:http://download.csdn.net/download/u012532263/10151298