This paper presents a novel facial animation retargeting system
that is carefully designed to support the animator¡¯s workflow. Observation
and analysis of the animators¡¯ often preferred process
of key-frame animation with blendshape models informed our research.
Our retargeting system generates a similar set of blendshape
weights to those that would have been produced by an animator.
This is achieved by rearranging the group of blendshapes into
several sequential retargeting groups and solving using a matching
pursuit-like scheme inspired by a traditional key-framing approach.
Meanwhile, animators typically spend a tremendous amount of
time simplifying the dense weight graphs created by the retargeting.
Our graph simplification technique effectively produces editable
weight graphs while preserving the visual characteristics of
the original retargeting. Finally, we automatically create GUI controllers
to help artists perform key-framing and editing very efficiently.
The set of proposed techniques greatly reduce the time and
effort required by animators to achieve high quality retargeted facial