qt5摄像头获取与图像保存

#include "test_capture.h" #include "ui_test_capture.h" #include<QPushButton> #include<QVBoxLayout> #include<QHBoxLayout> #include<QPixmap> test_capture::test_capture(QWidget *parent) : QWidget(parent), ui(new Ui::test_capture) { ui->setupUi(this); Init(); } test_capture::~test_capture() { delete ui; } void test_capture::Init() { this->setWindowTitle(QString::fromLocal8Bit("摄像头捕获")); this->resize(600,400); camera = new QCamera(); cameraviewfinder = new QCameraViewfinder(); cameraImageCapture = new QCameraImageCapture(camera); QPushButton *captureBtn = new QPushButton(QString::fromLocal8Bit("捕获")); QPushButton *saveBtn = new QPushButton(QString::fromLocal8Bit("保存")); QPushButton *exitBtn = new QPushButton(QString::fromLocal8Bit("退出")); displayLabel = new QLabel(); displayLabel->setFixedSize(150,150); displayLabel->setScaledContents(true); //打开自动平衡收放图片，显示图像大小，自动调节为QLabel的大小 QVBoxLayout *rightLayout = new QVBoxLayout(); rightLayout->addWidget(displayLabel); rightLayout->addStretch(); rightLayout->addWidget(captureBtn); rightLayout->addWidget(saveBtn); rightLayout->addWidget(exitBtn); mainlayout = new QHBoxLayout(); mainlayout->addWidget(cameraviewfinder); mainlayout->addLayout(rightLayout); connect(captureBtn,SIGNAL(clicked()),this,SLOT(captureBtnResponded())); connect(saveBtn,SIGNAL(clicked()),this,SLOT(saveBtnResponded())); connect(exitBtn,SIGNAL(clicked()),this,SLOT(exitBtnResponded())); connect(cameraImageCapture,SIGNAL(imageCaptured(int,QImage)),this,SLOT(cameraImageCaptured(int id,QImage image))); cameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToFile); camera->setCaptureMode(QCamera::CaptureStillImage); camera->setViewfinder(cameraviewfinder); camera->start(); this->setLayout(mainlayout); } void test_capture::captureBtnResponded() { cameraImageCapture->capture(); } void test_capture::saveBtnResponded() { const QPixmap *pximap = displayLabel->pixmap(); if(pximap) { pximap->save("F:\\a.jpg"); } } void test_capture::exitBtnResponded() { camera->stop(); this->close(); } void test_capture::cameraImageCaptured(int id, QImage image) { displayLabel->setPixmap(QPixmap::fromImage(image)); }