Low-dimensional procedure for the characterization of human faces
L. Sirovich, Michael J. L. Kirby · Journal of the Optical Society of America A · 1987
A method is presented for the representation of (pictures of) faces. Within a specified framework the representation is ideal. This results in the characterization of a face, to within an error bound, by a relatively low-dimensional vector. The method is illustrated in detail by the use of an ensemble of pictures taken for this purpose.