Patent Document ID: 20080014563
Application ID: 11628321
Patent Flag: 0

Claim One:
1. A method of recognizing faces in digital images, by statistical processing, in which there is provided ( 11 ) a learning base (BA) containing images of faces, this learning base being hierarchized as a plurality of classes each comprising different pictures of one and the same person, characterized in that said images are represented by matrices whose coefficients are values of pixels, and in that the method comprises a preprocessing of the learning base, in which: a matrix system representative of a variance between different classes ( 15 ) and of the inverse of a variance in each of the classes ( 14 ) is formed from said matrices, and a vector base ( 17 ) comprising discriminating components of said learning base is determined from said matrix system, aiming jointly at a minimization of the variance in each of the classes and a maximization of the variance between different classes.