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An Intrinsic Framework for Analysis of Facial Surfaces

Abstract : A quantitative analysis of shapes of facial surfaces can play an important role in biometric authentication. The main difficulty in comparing shapes of surfaces is the lack of a canonical system to represent all surfaces. This paper overcomes that problem by proposing a specific coordinate system, on facial surfaces, that enables comparisons of geometries of faces. In this system, a facial surface is represented as a path on the space of closed curves, called facial curves, where each curve is a level curve of distance function from the tip of the nose. Defining H to be the space of paths on the space of closed curves, the paper studies the differential geometry of H and endows it with a Riemannian. Using numerical techniques, it computes geodesic paths between elements of H that represent individual facial surfaces. This Riemannian analysis of faces is then used to: (i) find an optimal deformation from one face to another, (ii) define and compute an average face for a given set of faces, and (iii) compute distances between faces to quantify differences in their shapes. Experimental results are presented to demonstrate and support these ideas.
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Submitted on : Friday, February 3, 2012 - 11:12:38 AM
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Chafik Samir, Anuj Srivastava, Mohamed Daoudi, Eric Klassen. An Intrinsic Framework for Analysis of Facial Surfaces. International Journal of Computer Vision, Springer Verlag, 2009, 82, pp.80-95. ⟨10.1007/s11263-008-0187-8⟩. ⟨hal-00665862⟩



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