ubuntu下QT+OpenCV控制摄像头通过label 显示

来源：互联网发布：淘宝店铺装修页尾在线编辑：程序博客网时间：2024/06/15 11:11

第一步在XXX.pro中添加

INCLUDEPATH +=/usr/local/include/opencv \
/usr/local/include/opencv2
LIBS += /usr/local/lib/libopencv_calib3d.so \
/usr/local/lib/libopencv_contrib.so \
/usr/local/lib/libopencv_core.so \
/usr/local/lib/libopencv_features2d.so \
/usr/local/lib/libopencv_flann.so \
/usr/local/lib/libopencv_gpu.so \
/usr/local/lib/libopencv_highgui.so \
/usr/local/lib/libopencv_imgproc.so \
/usr/local/lib/libopencv_legacy.so \
/usr/local/lib/libopencv_ml.so \
/usr/local/lib/libopencv_objdetect.so \
/usr/local/lib/libopencv_ts.so \
/usr/local/lib/libopencv_video.so
第二 QT界面设置

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "opencv2/core/core.hpp"
#include"opencv2/highgui/highgui.hpp"
#include"opencv/cv.h"
#include"opencv/highgui.h"
#include<QFileDialog>
#include<QPixmap>
#include<QImage>
#include<QLabel>

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

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

void MainWindow::on_open_clicked()
{
    CvCapture *capture   = NULL;// 视频获取结构，用来作为视频获取函数的一个参数
     capture = cvCreateCameraCapture(0);//打开摄像头，从摄像头中获取视频
     IplImage* frame;//申请IplImage类型指针，就是申请内存空间来存放每一帧图像
     while(1) {
         frame = cvQueryFrame( capture );// 从摄像头中抓取并返回每一帧
         if( !frame ) break;
         QImage *image;
         uchar *imgData=(uchar *)frame->imageData;
         image=new QImage(imgData,frame->width,frame->height,QImage::Format_RGB888);
          ui->QImgShow->resize(frame->width/3,frame->height/3);
          ui->QImgShow->setPixmap(QPixmap::fromImage(*image).scaled(ui->QImgShow->size()));
         char c = cvWaitKey(33);//延时，每秒钟约33帧；符合人眼观看速度；
         if( c == 27 ) break;//由于是死循环，而且没有控制台，当按下键盘exc键，退出循环；
             }

     cvReleaseCapture( &capture );//释放内存；

}

void MainWindow::on_close_clicked()
{

}