How to use the GUI:

- Unzip the folder in a certain directory.
- in the same directory, put te images on which you want to apply the 
  distortion-undistortion.
- Open MATLAB and set the directory where you uncompressed the folder 
  as the workig directory.
- Printing and executing the "command handler", the GUI is starting.
- You can see the files that can be accessed by the GUI (the images must 
  have a .jpg extension).
- Enjoy playing with distortion!!!!