3-D motion estimation and wireframe adaptation including photometric effects for model-based coding of facial image sequences

Proposes a novel formulation where 3D global and local motion estimation and the adaptation of a generic wireframe model to a particular speaker are considered simultaneously within an optical flow based framework including the photometric effects of the motion. We use a flexible wireframe model who...

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Vydáno v:IEEE transactions on circuits and systems for video technology Ročník 4; číslo 3; s. 246 - 256
Hlavní autoři: Bozdagi, G., Tekalp, A.M., Onural, L.
Médium: Journal Article
Jazyk:angličtina
Vydáno: IEEE 01.06.1994
Témata:
Geometrical optics
Image motion analysis
Image sequences
Motion estimation
Optical propagation
Optical variables control
Parameter estimation
Photometry
Stochastic processes
ISSN:1051-8215
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Shrnutí:Proposes a novel formulation where 3D global and local motion estimation and the adaptation of a generic wireframe model to a particular speaker are considered simultaneously within an optical flow based framework including the photometric effects of the motion. We use a flexible wireframe model whose local structure is characterized by the normal vectors of the patches which are related to the coordinates of the nodes. Geometrical constraints that describe the propagation of the movement of the nodes are introduced, which are then efficiently utilized to reduce the number of independent structure parameters. A stochastic relaxation algorithm has been used to determine optimum global motion estimates and the parameters describing the structure of the wireframe model. Results with both simulated and real facial image sequences are provided.< >
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ISSN:1051-8215
DOI:10.1109/76.305870