It would be really cool if there was an interfaces for "amateurs": Disable parameters and just show small previews of how the image would look with those parameters.
E.g. First screen: Show previews of mapping the file with different algorithms.
Then, show the file with different parameters for the chosen algorithm.
When you click, chose those settings and offer less/more previews for each parameter.
This would make Qtpfsgui really extremely and intuitive easy to use!