Qt offers a rich library to build a sophisticated GUI with a professional look. Using Qt Creator, the process of GUI creation is made easy. This recipe will show you how to build an OpenCV application with Qt that a user can control using a GUI.
Start Qt Creator which we will use to create our GUI application. It is also possible to create a GUI without this tool, but the use of a visual IDE in which the widgets can simply be dragged and dropped is the easiest way to build a nice looking GUI.
Select Create New Project… and choose Qt GUI Application as seen in the following screenshot:
Give a name and a location to your project. If you then click on Next, you will see that the QtGUI ...