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Weighted Pose Space Editing for Facial Animation
Paper (5.1M PDF)
Abstract
Blendshapes are most commonly used by
animators to produce facial animation in production.
Typically, the animators begin with a relatively small
number of blendshapes, encounter a limit on expres-
siveness, then sculpt additional blendshapes to achieve
the animation goal. To make this additional sculpt-
ing process much more ecient, we present a novel
editing method for blendshape based facial animation.
Based on the delta formulation of blendshape, addi-
tional sculptings on already keyframed animation train
a Radial Basis Functions (RBF) network with the Gaus-
sian kernel for each vertex. Using this technique, the
artist's sculpting on a problematic expression is auto-
matically applied to similar expressions in an entire se-
quence, and indeed all future sequences. The amount
of editing e ect is easily controllable and the e ect is
smoothly propagated through the surrounding frames
of the similar expressions. We applied this technique
to facial animation sequences that require the editing
of further sculpting. In addition, we present a search
scheme that allows e ective reuse of pre-sculpted edit-
ing examples. Our system greatly reduces time and ef-
fort required by animators to create high quality facial
animations.
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