Facial shape and 3D skin

Abstract

We present novel ideas for facial shape and skin simulation on extremely detailed threedimensional facial meshes. Our input database is composed of a small number of scanned human faces with resolutions up to several million triangles, where even the pores are clearly distinguished. We show how to decompose the facial meshes into the global shape of the face plus skin detail (3D skin), and then to reconstitute them. Our modeling methodology allows us to simulate the exaggeration of the facial global shape, retaining the original skin detail, as well as to transfer 3D skin from one face to another. First, we represent all the input faces in terms of a homogeneous structure on the base model in low resolution by using mesh adaptation techniques. Second, the differences between the original mesh and a base mesh, which appear as skin detail, are captured and stored, so that each face is decomposed into the global shape (a base mesh) plus skin detail. Face reconstitution after global shape exaggeration and/or skin transfer enables delicate simulation of facial models. In addition, we can increase the resolution of any model scanned at a low resolution by transferring skin from a higher resolution model. Our method shows successful manipulation of the minute structure of 3D skin differently from other methods such as Normal Mapping, Displacement Mapping, Displaced Subdivision Surfaces, and Normal Meshes where none of these techniques show manipulation of minute structure like ours and only approximation is used while our method recovers the original structure.

Trigonometric Curve-Based Human Modeling

“…(Venkataraman et al, 2005) introduced a combination of a kinematic and a variational model to deal with the wrinkling of skin by minimising a functional including energies for stretching, bending and self-intersection. By decomposing the facial meshes into the global shape and 3D skin detail and recomposing the shape and 3D skin, (Lee and Soon, 2006) proposed a method to reproduce the scanned model which allows to simulate the exaggeration of the facial global shape, retain the original skin detail and transfer 3D skin from one to another. Using sweeps following a simplified skeleton, proposed a new method to carry out realistic human hand modeling and deformation which can achieve realtime performance.…”