qt 5.4.0+opencv248获取摄像头简单demo

#include <QApplication> #include <QtWidgets/QWidget> #include <QtWidgets/QLabel> #include <QtGui/QImage> #include <QtGui/QPixmap> #include "opencv2/core/core.hpp" #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" using namespace cv; int main(int argc,char **argv) { QApplication app(argc,argv); QLabel labelxxx; Mat imagexxx, rgbxxx; QImage qimgxxx; VideoCapture cap(0); while(1) { cap >> imagexxx; if(imagexxx.channels()==3) { cv::cvtColor(imagexxx,rgbxxx,CV_BGR2RGB); qimgxxx = QImage((const unsigned char*)(rgbxxx.data), rgbxxx.cols,rgbxxx.rows, rgbxxx.cols*rgbxxx.channels(), QImage::Format_RGB888); } else { qimgxxx = QImage((const unsigned char*)(imagexxx.data), imagexxx.cols,imagexxx.rows, imagexxx.cols*imagexxx.channels(), QImage::Format_RGB888); } labelxxx.setPixmap(QPixmap::fromImage(qimgxxx)); labelxxx.resize(labelxxx.pixmap()->size()); labelxxx.show(); qApp->processEvents(QEventLoop::AllEvents); } app.exec(); }