Modeling and Synthesis of Realistic Visual Speech in 3D - 3D Modeling and Animation: Synthesis and Analysis Techniques for the Human Body - page 281

Figure 10. Orthogonal projection of a novel face onto the hyper-plane
formed by the neutral example faces.

the example face i into the vector F i . If the coordinates of the projected, novel
face F are given by

nov

n

= ∑

F ω F

(6)

nov i i

i = 1

ω

the same weights are applied to the visemes of the example faces, to yield

a personalized set of visemes for the novel face. The effect is that a rounded face
will get visemes that are closer to those of the more rounded example faces, for
instance.
This step in the creation of personalized visemes is schematically represented in
Figure 11.

i

Figure 11. A novel face can be approximated as a linear combination of
example faces. The same combination of the example faces' visemes yields
a first version of the novel face's viseme set.