Originally Posted by micfire

I find PicScout's Image Tracker quite fascinating if it actually does what it promises. For instance how can it match a picture if it has been resized, reshaped and recolored. And what's the error margin... I don't believe it can work very reliably so if you just modify your stolen pictures, you are pretty much safe. Basically it would have to match shapes in the picture and measure unique ratios between edges etc. But that still sounds like you would get a million false alerts per one generic image.