applications and can be used within functionally rich UI frameworks (such as Qt, WinForms or Cocoa) or without any UI at all, sometimes there is a need to try some functionality quickly and visualize the results. This is what the HighGUI module has been designed for.
It provides easy interface to:
* create and manipulate windows that can display images and "remember" their content (no need to handle repaint events from OS)
* add trackbars to the windows, handle simple mouse events as well as keyboard commmands
* read and write images to/from disk or memory.
* read video from camera or file and write video to a file.
