This project makes a nice little wrapper for a GUI used to calibrate OpenCV's warpPerspective function in Python. It provides a GUI that the user can click the top left, top right, bottom right and bottom left corners to produce a Warper object that can used later to warp images from sources such as a webcam.

Copyright (c) 2017 OpenCV, Alexander Mordvintsev, Abid Rahman K., Abram Hindle

BSD-3 Clause License

Copyright (c) 2017 Abram Hindle licensed under CC-BY-SA 4.0

Taken from OpenCV http://docs.opencv.org/3.1.0/da/d6e/tutorial_py_geometric_transformations.html by Alexander Mordvintsev (GSoC-2013 mentor) and Abid Rahman K. (GSoC-2013 intern)

UI inspired from Adrian Rosebrock http://www.pyimagesearch.com/2015/03/09/capturing-mouse-click-events-with-python-and-opencv/