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I have the save problem with :

OpenCV git master (3.0.0-dev)
OpenSuse 12.3

I believe I have Qt backend. Here is my OpenCV build :

cmake -D CMAKE_BUILD_TYPE=RELEASE -D WITH_QT=ON -D WITH_OPENGL=ON -D CMAKE_INSTALL_PREFIX=/usr/local ../
[...]
--   GUI: 
--     QT 4.x:                      YES (ver 4.8.4 EDITION = OpenSource)
--     QT OpenGL support:           YES (/usr/lib64/libQtOpenGL.so)
--     OpenGL support:              YES (/usr/lib64/libGLU.so /usr/lib64/libGL.so /usr/lib64/libSM.so /usr/lib64/libICE.so /usr/lib64/libX11.so /usr/lib64/libXext.so)
--     VTK support:                 NO
[...]

My code :

namedWindow( "Normal", CV_WINDOW_NORMAL ); 
imshow( "Normal", image );               

namedWindow( "FreeRatio", CV_WINDOW_FREERATIO | CV_GUI_NORMAL); 
imshow( "FreeRatio", image );               
resizeWindow("FreeRatio",image.cols,image.rows);

The resizeWindow have no effect ! Both window have the same size. In the freeratio window, my image is deformed as the default window size ratio is different from my image (but it means that I do understand the Qt flag CV_WINDOW_FREERATIO

I have the save problem with :

OpenCV git master (3.0.0-dev)
OpenSuse 12.3

I believe I have Qt backend. Here is my OpenCV build :

cmake -D CMAKE_BUILD_TYPE=RELEASE -D WITH_QT=ON -D WITH_OPENGL=ON -D CMAKE_INSTALL_PREFIX=/usr/local ../
[...]
--   GUI: 
--     QT 4.x:                      YES (ver 4.8.4 EDITION = OpenSource)
--     QT OpenGL support:           YES (/usr/lib64/libQtOpenGL.so)
--     OpenGL support:              YES (/usr/lib64/libGLU.so /usr/lib64/libGL.so /usr/lib64/libSM.so /usr/lib64/libICE.so /usr/lib64/libX11.so /usr/lib64/libXext.so)
--     VTK support:                 NO
[...]

My code :

namedWindow( "Normal", CV_WINDOW_NORMAL ); 
imshow( "Normal", image );               

namedWindow( "FreeRatio", CV_WINDOW_FREERATIO | CV_GUI_NORMAL); 
imshow( "FreeRatio", image );               
resizeWindow("FreeRatio",image.cols,image.rows);

CV_WINDOW_FREERATIO)