Slashdot Mirror
Eigenfaces Online Service
nordicfrost writes "At Norways largest online newspaper, they're doing the beta test of an Eigenface service. In short, it takes a portrait picture, treats it with some filters and analyzes the vectors in it. This is used for crimestopping and generic Big Brother activities. In this database, however, your mug is compared with celebrites to find which one that matches you the most. I match, among others, Brad Garrett. This site is pretty self-explaining, upload a portrait pic of yourself taken right in front of your face, closely cropped to the face and use the up arrow to see your top ten list of celebrity matches. You have to agree to some terms first, like giving permission to use your pic in promotions and other stuff and not to upload indecent stuff."
"Seperated at Birth"; it was used to give a celebrity that a suspect looked like, as apparently people have an area of the brain devoted to tracking celebs or something. Very, very, very similar, actually. I fully expect much more of Gibson's stuff to appear on this page in the coming years.
The Slashdot Paradox: "100% Overrated"
Translation:
Subject: Dear God, what has happened to our bandwidth?
Comment: DAMN Slashdot!
kvinne = woman
mann = the other one
probably too late for anyone to see this, but look what I found: an open implementation hosted on sourceforge
It's named eigenfaces because the underlying compression technique uses eigenvalues/vectors.
It's called PCA (principle components analysis) and works by finding an underlying low-dimensional representation that minimises the reconstruction error when you put everything back together.
So you find a new set of basis vectors to represent the data with, where your new set is smaller than your old set.
It turns out that the best basis used for the reconstruction is formed from the 'biggest' eigenvectors (those with the largest eigenvalues) of the covariance matrix of the data.