I am working on an embedded System with a Debian-based Linux, OpwnCV 3.0 at the Moment. The System has a 320x240 LC Display.
I want to show an OpenCV Mat fullscreen, without any border or title bar.
Is this possible with namedWindow ? or are there alternative ways to to show a cv::Mat ?
Best regards
Bernhard
namedWindow( "test", WINDOW_NORMAL );
setWindowProperty("test",WND_PROP_FULLSCREEN,WINDOW_FULLSCREEN);
i can't test it on Linux but it works pretty well on Windows.
you can test the code below on your system
#include "opencv2/highgui.hpp"
using namespace cv;
int main( int argc, char** argv )
{
Mat image(200,200,CV_8UC3,Scalar(150,150,150));
namedWindow( "background window", WINDOW_NORMAL );
setWindowProperty("background window",WND_PROP_FULLSCREEN,WINDOW_FULLSCREEN);
imshow( "background window", image ); // you will not see the title
image.setTo(Scalar(0,0,200));
imshow( "Second Window", image ); // this is normal window over background window
waitKey(0);
return 0;
}
Asked: 2016-03-17 11:32:15 -0600
Seen: 8,059 times
Last updated: Mar 18 '16
this is probably not doable from plain opencv (too many abstraction layers between you and the window creation) , but, what kind of gui are you using ? it probably needs diving deeper into that.
berak is right. namedWindow/imshow are basic functions, they are not intended to create a nice GUI.
To display images in fullscreen, I think the best way is to create an OpenGL (GLUT) wrapper; create a fullscreen window, a polygon which fills this window and use your image as texture.
Another solution would be to use Qt. Create a fullscreen window with a QGraphicsWidget of a QLabel, transform your Mat to QImage and display it.