id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-948	Hosten, P.; Asbach, M.	Detection of Facial Features in Scale-Space	2007	5	.pdf	application/pdf	3132	197	63	In the second subset all feature vectors describing the rest of the image are aggre- gated (class a � 0): � � � �F a F aface non face� � � � � �f f1 0, (8) Each subset is clustered with the k-means algorithm. (6) The columns of transform matrix � are the eigenvectors of �.	cache/ap-948.pdf	txt/ap-948.txt