Do i need to provide the exact same reference i used? The reference I used is a little bit famous, and a lot of sites host it. Should i link the  image on the exact site that I got the image or I can link any other site with the same image?
Sorry i this pisses people off, it's kinda my speciality. And sorry if my english is bad :)

Yeah, it makes no difference. If you pixel the Mona Lisa, any image of the Mona Lisa will do.

The exception is if you trace (or worse, color reduce) an image, then provide a link to an image that's slightly different--say, a photo of the same painting only taken from a different angle--in an attempt to deceive.

It's really just a matter of being open, honest, and transparent about your methods.

Edited by Hatch - 05 July 2009 at 10:48am