Figure 2
From: Model-Based Synthesis of Visual Speech Movements from 3D Video
Parameterisation of speech lip movements: (a) residual variances for the first 30 dimensions of 
(blue) and 
(red); (b) the speech manifold evident in the first 
dimensions of 
: colour indicates density of the projection (blue least dense 
red most dense), dashed line indicates the plane of symmetry between opening/closing of the lips, and vectors 
and 
indicate maximum change in lip shape and velocity, respectively.