Image Permutator

This program was designed to taken an image file and return its absolute index out of all the
possible permutations of images given the same width, height and colour depth. The program
also works in reverse. Given an permutation index, width, height and colour depth the image
can be reconstructed.
The aim of this was to see if there was a relationship with the permutation index and similar
images. For example, imagine consecutive frames of a movie: would these keys be spaced
randomly or would there be a pattern. Similary, if you took a photo of your face every year,
could you find a formula to relate all these images to find the next in the sequence, and could
the same formula be applied to other photos to produce similar results?