We have used the ORL database that contains a set of faces taken between April 1992 and April 1994 at the Olivetti Research Laboratory in Cambridge, UK3. There are 10 Different images of 40 distinct subjects. For some of the subjects, the images were taken at different times. There are variations in facial expression (open/closed eyes, smiling/non smiling), and facial details (glasses/no glasses). All the images were taken against a dark lhomogeneous background with the subjects in an up right, fiontal position, witli tolerance for some tilting and rotation of up to about 20 degrees. There is some variation in scale of up to about 10%. Set of images for one subject is shown in fig. I. The images are grayscale with a resolution of 92x 112.