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PODisplay video using QImage in the same window?
 

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  1. PODisplay video using QImage in the same window?
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    <p>I am trying to display the video taken by a simulator. I am implementing the QT code in ROS by including its header file. My code is running. PROBLEM:: Everytime the new window is opened to display the frame. I have kept cvWaitKey(10000) so that new windows will come after a time delay. But the updated frames should come inside the same window. Pls suggest how can i do it?? My code is following:</p> <pre><code> void imageCallback( const sensor_msgs::ImageConstPtr&amp; msg) //const sensor_msgs::ImageConstPtr&amp; { imagePublisher.publish (cv_ptr-&gt;toImageMsg()); QImage temp(&amp;(msg-&gt;data[0]), msg-&gt;width, msg-&gt;height, QImage::Format_RGB888); QImage image; image=temp; // QT Layout with button and image static QWidget *window = new QWidget; static QLabel *imageLabel= new QLabel; static QPushButton* quitButton= new QPushButton("Quit"); static QPushButton* exitButton= new QPushButton("Exit Image"); QVBoxLayout* layout= new QVBoxLayout; imageLabel-&gt;setPixmap(QPixmap::fromImage(image)); layout-&gt;addWidget(imageLabel); layout-&gt;addWidget(exitButton); layout-&gt;addWidget(quitButton); window-&gt;setLayout(layout); QObject::connect(quitButton, SIGNAL(clicked()),window, SLOT(close())); // Adding Buttons QObject::connect(exitButton, SIGNAL(clicked()),imageLabel, SLOT(close())); window-&gt;show(); cvWaitKey(1); } </code></pre> <p>int main(int argc, char **argv) {</p> <pre><code> ros::init(argc, argv, "imageSelectNode"); ros::NodeHandle n("~"); image_transport::ImageTransport it(n); image_transport::Subscriber sub = it.subscribe("/camera/image_raw",1, imageCallback); imagePublisher = it.advertise("imagePublisherTopic", 1); //Publish the image in 'imagePublisherTopic' node QApplication a(argc, argv); ros::spin(); return 0; </code></pre> <p>}</p>
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