Getting screen size on OpenCV

Question

How do I get the computer screen resolution on OpenCV? I need to show two images side by side using the whole screen width, OpenCV requires the exact window size I wanna create.

Answer 1

In new version it also works like below, which is great :-D

printf("%f",cap.get(CV_CAP_PROP_FRAME_HEIGHT));

for setting video res.

.set(property_in_caps, value_in_double);

ex, cap.set(CV_CAP_PROP_FRAME_HEIGHT, 720);