In this project, I have written a code implementing Principal Component Analysis which is one of the most famous method for facial recognition. The dataset used in this example is a preprocessed excerpt of the "Labeled Faces in the Wild", aka LFW_:
http://vis-www.cs.umass.edu/lfw/lfw-funneled.tgz (233MB)
.. _LFW: http://vis-www.cs.umass.edu/lfw/
original source: http://scikit-learn.org/stable/auto_examples/applications/face_recognition.html