Comment: Logo hunting (Score 5, Informative) 2008-08-18 09:28
Attached to: Visual Search Engine Tracks Stolen Images
So to test it out I grabbed a couple of logos (AIG, Slashdot, Bluesquare, Nike swoosh) and found that what it will do is find scaled down images or ones of lower quality but it won't handle significant colour shifts. So AIG for instance have a blue logo but sponsor Manchester United where their logo is displayed on a red background, the Nike swoosh I tested had a white background and all I got was basic black on white swoosh elements.
Now with photos this is less of an issue as major colour shifts are unusual but it does mean that for commercial and design art its not really as applicable.

