Patent ID: 6532011
Filing Date: 2003-03-11
Classification: G06K,G06T

Abstract:
A method of creating 3D facial models (M) starting from face images (I), which comprises the steps of:(a) providing at least one face image (I); (b) providing a 3-D facial model (M) having a vertex structure and comprising a number of surfaces chosen within the group formed by: a face surface (V), a right eye and left eye (OD, OS) surface upper teeth and lower teeth (DS, DL) surface, (c) choosing respective sets of homologous points among the vertices of the structure of said model (M) and on said at least one face image (I); and (d) modifying the structure of said model (M) so as to make the respective sets of homologous points coincide, the modification of the structure of said model (M) including at least one of the operations chosen within the group formed by: (d1) making the width of the projection of the model (M) coincide with the width of said face image (I), (d2) vertically registering the projection of the model (M) with said face image (I), and (d3) performing a global, nonlinear transformation of the model (M) in the vertical direction in order to make the position of at least one characteristic feature of the model (M) coincide with an homologous characteristic feature of such face image (I), said modification of the structure of the model (M) being carried out in the form of a geometric operation performed by positioning said face image (I) and said model (M) in opposite and mirroring positions with respect to the origin (O) of a three-dimensional Cartesian system (X, Y, Z).