The site has been using md5 sums to calculate if it's the
exact same image. The new system uses a little bit of fuzzy logic to guess if the actual content is the same, based on probability.
You'll still be able to beat it easily enough if you're trying to, the point is to stop accidental dupes. We can't stop people who are deliberately trying to be annoying and upload duplicates
Edit: Btw, you don't even need to change a pixel, "echo >> filename.jpg" will do the same, change any byte or the file's length and the md5 calculation will have changed.
Edited 1 time(s). Last edit at 01/12/2008 07:36AM by pulse.