Xerxys

Does Anyone know how to run a picture search or know of a picture profiling software? This has been largely inspired by my excessive pornography viewing and TV shows like Las Vegas but I simply thought it would be interesting to match a face or picture and come up with answers.

Like I spent a whole day looking for the Tribal tattoo Jin Kazama of Tekken #3 - 6 has on his left upper arm and when I installed picture grab, I got it in 30 seconds. I'm talking of a software similar to picture grab instead we search for matching photographs other than matching key-words, like what police use to identify people: facial recognition software or fingerprints.

Any help would be appreciated.