3D Models of the Lips for Realistic Speech Animation
Abstract
3D models of the lips have been developed in the framework of an audiovisual articulatory speech synthetizer. Unlike most of the regions of the human face, the lips are essentially characterized by their border contours. The internal and external contours of the vermilion zone can be fitted by means of algebraic equations. The coefficients of these equations must be controlled so that the lip shape can be adapted to various speakers conformations and to any speech gesture. To reach this goal, a 3D model of the lips has been worked out from geometrical analysis of the natural lips of a French speaker. Our lip model was developed to adjust a set of continuous functions best fitting the contours of 22 reference lip shapes. Only five parameters are necessary to predict all the equations of the contours of the lip model. From this model, a volumic model based on implicit surfaces was also developped to take in account lip contact.
Keywords
speech synthesis
natural languages
audio-visual systems
computer animation
realistic images
3D models
lip modelling
realistic speech animation
audio visual articulatory speech synthesizer
human face
border contours
vermilion zone
algebraic equations
lip shape
speaker dependent conformations
geometrical analysis
natural lips
French speaker
continuous functions
reference lip shapes
volumetric model
implicit surfaces
lip contact
Domains
Graphics [cs.GR]
Origin : Files produced by the author(s)
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