![](/img/trans.png)
[英]How to play a local video in a Qt Widgets Application, in Qt creator?
[英]GUI with Qt Creator to play video
frame = cvQueryFrame(camera);
while(key!='q'){
cvNamedWindow( "main",CV_WINDOW_AUTOSIZE);
cvShowImage("main", frame);
if(frame!=NULL){
drawSquares( frame, findSquares4( frame, storage ) );
/* wait for key. Also the function cvWaitKey takes care of event processing */
key = cvWaitKey(33);
IplImage *img = cvCloneImage(frame);
if (img->origin){
cvFlip(img);
img->origin= 0;
}
QImage* qimg = IplImageToQImage(img)
// qimg = IplImage2QImage (img);
QLabel label;
ui->label->setPixmap(QPixmap::fromImage(qimg));
cvReleaseImage(&img);
我喜歡用 Qt Creator 播放視頻。 我用上面的代碼,但是不行。 我收到以下錯誤:
IplImageToQImage 未在此范圍內聲明
有誰知道如何在同一窗口中使用 OpenCV 和 Qt Creator 播放視頻?
嗯,這是有道理的,因為IplImage2QImage()
既不是 Qt 也不是 OpenCV 的一部分。
您可能在 Internet 上的某處看到此函數被使用並復制/粘貼到您的代碼中。
通過在 Google 上的簡單搜索,我找到了這個函數的實現:
static QImage IplImage2QImage(const IplImage *iplImage)
{
int height = iplImage->height;
int width = iplImage->width;
if (iplImage->depth == IPL_DEPTH_8U && iplImage->nChannels == 3)
{
const uchar *qImageBuffer = (const uchar*)iplImage->imageData;
QImage img(qImageBuffer, width, height, QImage::Format_RGB888);
return img.rgbSwapped();
} else if (iplImage->depth == IPL_DEPTH_8U && iplImage->nChannels == 1){
const uchar *qImageBuffer = (const uchar*)iplImage->imageData;
QImage img(qImageBuffer, width, height, QImage::Format_Indexed8);
QVector<QRgb> colorTable;
for (int i = 0; i < 256; i++){
colorTable.push_back(qRgb(i, i, i));
}
img.setColorTable(colorTable);
return img;
}else{
qWarning() << "Image cannot be converted.";
return QImage();
}
}
希望你會知道如何處理它。
我寫了這個最小的例子來展示如何成功使用IplImage2QImage()
。 它使用cvLoadImage()
從磁盤加載名為 test.jpg 的文件,然后將其顯示在 QLabel 上。 這很簡單,而且有效!
#include <cv.h>
#include <highgui.h>
#include <iostream>
#include <QtGui>
#include <QImage>
static QImage IplImage2QImage(const IplImage *iplImage)
{
int height = iplImage->height;
int width = iplImage->width;
if (iplImage->depth == IPL_DEPTH_8U && iplImage->nChannels == 3)
{
const uchar *qImageBuffer = (const uchar*)iplImage->imageData;
QImage img(qImageBuffer, width, height, QImage::Format_RGB888);
return img.rgbSwapped();
}
else if (iplImage->depth == IPL_DEPTH_8U && iplImage->nChannels == 1)
{
const uchar *qImageBuffer = (const uchar*)iplImage->imageData;
QImage img(qImageBuffer, width, height, QImage::Format_Indexed8);
QVector<QRgb> colorTable;
for (int i = 0; i < 256; i++)
{
colorTable.push_back(qRgb(i, i, i));
}
img.setColorTable(colorTable);
return img;
}
else
{
std::cout << "Image cannot be converted.";
return QImage();
}
}
int main(int argc, char** argv)
{
QApplication app(argc, argv);
IplImage* img = cvLoadImage("test.jpg", 1);
if (!img)
{
std::cout << "Failed to load test.jpg";
return -1;
}
QImage qt_img = IplImage2QImage(img);
QLabel label;
label.setPixmap(QPixmap::fromImage(qt_img));
label.show();
return app.exec();
}
在我的 Linux 機器上,我編譯了它:
g++ qimage.cpp -o qimage -I/usr/local/include/opencv -I/usr/local/include -I/opt/qt_47x/include -I/opt/qt_47x/include/QtGui -L/usr/local/lib -L/opt/qt_47x/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lQtCore -lQtGui
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.