Computer Animation Algorithms and Techniques

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Presentation transcript:

Computer Animation Algorithms and Techniques Facial Animation

Facial models Anatomic structure FACS - muscle activation rigid parts texture maps continuous surface models textures

Facial anatomy - bone structure http://face-and-emotion.com/dataface/anatomy/attachments.jsp

Facial anatomy - muscles http://www.philipgraham.net/

Facial anatomy - muscles

FACS: Action units http://microexpresion.wordpress.com/2010/01/27/facs-%E2%80%93-au-9/

Facial model: texture map

Facial model: rigid parts

Facial model: continuous surface

Animating the face Parameterized models Blend shapes Muscle models Expressions

Fred Parke’s parameterized model 1974 http://mambo.ucsc.edu/psl/parke.html

Park’s parameterized model

Blend shapes http://www.sintel.org/wp-content/uploads/2010/02/12_examples_facialshapes_wireframes2.png

“Surface” muscles

Deep structure - side view

Muscle activation

Spring-mass-damper system

Spring-damper unit

Muscle model Contractile unit Damper Spring Spring www.shadmehrlab.org/book/musclemodel.pdf

Facial expressions http://home.bournemouth.ac.uk/

Facial expressions http://www.scott-eaton.com/

MPEG-4

Facial anatomy - speech http://www.human-anatomy.net/anatomy-speech-language-pathology.html

Lip Sync Articulators of speech Phonemes Coarticulation Prosody

Lip Sync Nasal Cavity Vellum Oral Cavity Lips Tongue Vocal Folds Jaw Lungs