If you want a taste of face recognition software, maybe have a few gazillions of unorganized photos on your computer, and have some time to spare, take a look at Picasa's face recognition feature. I went through 8 gigs of photos taken over the past 12 years with digital cameras along with a few scanned in older photos. The free software does an amazing job! I'm assuming it's the same sort of software that's used in the UK and elsewhere to ID criminals.
In probably 2000+ photos of our daughter, the only mismatches were with her mother's face, which seems logical.
Once you go through and put names to faces, it makes scanning through a disorganized photo library much easier.
Picasa is a free download from google.





