Comment Problem with face recognition (Score 3, Informative) 375
The problem with all of these algorithms is that it doesn't matter how accurate they are, they are only ever going to be a way to reduce the search space - you should never base a decision solely on the algorithm telling you "this is person X".
For example, some sales person says "Hey I've got this great facial recognition software it is 99.99% accurate!" (that's better than most facial algorithms out there) sounds pretty good right! - Wrong!. Suppose you set it up to look for one terrorist at Heathrow airport. The system is likely to flag up 650 000 people a year (based on 65 million passengers a year); of course it gets even worse if you start looking for more people.