http://www.pages.drexel.edu/~sis26/Eigenface%20Tutorial.htm
http://onionesquereality.wordpress.com/2009/02/11/face-recognition-using-eigenfaces-and-distance-classifiers-a-tutorial/
http://www.face-rec.org/algorithms/PCA/jcn.pdf
http://www.face-rec.org/algorithms/PCA/moon_perception.pdf
Face Recognition Algorithm
http://www.face-rec.org/algorithms/
