How Photoshopped Is That Picture?
Freddybear writes "Digital forensics experts at Dartmouth have developed software that can analyze digital photos to rate how drastically they have been altered by digital editing techniques. 'The Dartmouth research, said Seth Matlins, a former talent agent and marketing executive, could be "hugely important" as a tool for objectively measuring the degree to which photos have been altered.'"
The whole term is dumb. You don't photoshop something in GIMP, for instance... just like you don't xerox on a Cannon.
http://dictionary.reference.com/browse/xerox
noun 2. ( sometimes lowercase ) a copy made on a xerographic copying machine.
verb (used with object), verb (used without object) 3. ( sometimes lowercase ) to print or reproduce by xerography.
See also: http://dictionary.reference.com/browse/photoshop — vb , -shops , -shopping , -shopped ( tr ) to alter (a digital photograph or other image), using an image editing application, especially Adobe Photoshop
Notice it says especially, not exclusively.
My point is that you most certainly do photoshop something in G.I.M.P..