The HighGUI module in OpenCV is responsible for quick and simple GUIs. We already used one of the widely used functions within this module, imshow, to quickly display images in Chapter 3, Creating a Comprehensive Qt+OpenCV Project, of this book. But, as we are going to learn about Qt and a more sophisticated framework for dealing with GUI creation, we are going to skip this module completely and move on to Qt subjects. However, just before that, it's worth quoting the introduction of the HighGUI module in the OpenCV documentation:
"While OpenCV was designed for use in full-scale applications and can be used within functionally rich UI frameworks (such as Qt\*, WinForms\*, or Cocoa\*) or without any UI at all, sometimes there it is required to try functionality quickly and visualize the results. This is what the HighGUI module has been designed for."
As you'll learn later on in this chapter, we'll also stop using the imshow function and stick to Qt capabilities...
