title: Revert edited image - android
body: <p>I wanted to know if its possible to revert all the changes made to an image by other s/w such as gimp,etc.
  I want to make an android app that takes in any pic and returns the original (or close to original) pic.
  I googled, but all the results are trivial and none involved the coding part of it.
  Thank you</p>