Hi,
The GUI elements built into OpenCV are fairly limited, and don't have features like true keyboard callbacks (waitKey stalls the program) or buttons. I realise Qt is supported but that is a huge library and I don't need to make full use of all of its features. I also need something which will not slow down my programs as I will be running them on NVidia Tegras and Raspberry Pis.
So my question: has anyone found any lightweight C++ GUI libraries which they have managed to integrate into their OpenCV programs (notably reading in a cv::Mat and displaying it in the GUI)? I have looked at FLTK but the license is GPL and I am looking for something with a BSD license or similar where I do not have to open source my code.
Thanks