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dc.contributor.authorBozdağı, Gözdeen_US
dc.contributor.authorTekalp, A. M.en_US
dc.contributor.authorOnural, Leventen_US
dc.coverage.spatialAdelaide, South Australia, Australiaen_US
dc.date.accessioned2016-02-08T12:01:27Z
dc.date.available2016-02-08T12:01:27Z
dc.date.issued1994en_US
dc.identifier.issn1520-6149en_US
dc.identifier.urihttp://hdl.handle.net/11693/27778
dc.descriptionDate of Conference: 19-22 April 1994en_US
dc.descriptionConference Name: 19th International Conference on Acoustics, Speech and Signal Processing, IEEE 1994en_US
dc.description.abstractWe address the problem of 3-D motion estimation in the context of knowledge-based coding of facial image sequences. The proposed method handles the global and local motion estimation and the adaptation of a generic wire-frame to a particular speaker simultaneously within an optical flow based framework including the photometric effects of motion. We use a flexible wire-frame 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 wire-frame model. For the initialization of the motion and structure parameters, a modified feature based algorithm is used. Experimental results with simulated facial image sequences are given.en_US
dc.language.isoEnglishen_US
dc.source.titleProceedings of the 19th International Conference on Acoustics, Speech and Signal Processing, IEEE 1994en_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/ICASSP.1994.389400en_US
dc.subjectFacial image sequenceen_US
dc.subjectFeature-based algorithmen_US
dc.subjectGeometrical constraintsen_US
dc.subjectLocal motion estimationsen_US
dc.subjectModel Adaptationen_US
dc.subjectMotion and structureen_US
dc.subjectStochastic relaxationen_US
dc.subjectStructure parameteren_US
dc.subjectAlgorithmsen_US
dc.subjectComputer visionen_US
dc.subjectImage codingen_US
dc.subjectKnowledge based systemsen_US
dc.subjectPhotometryen_US
dc.subjectStochastic modelsen_US
dc.subjectWireen_US
dc.subjectMotion estimationen_US
dc.titleSimultaneous 3-D motion estimation and wire-frame model adaptation including photometric effects for knowledge-based video codingen_US
dc.typeConference Paperen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spageV413en_US
dc.citation.epageV416en_US
dc.identifier.doi10.1109/ICASSP.1994.389400en_US
dc.publisherIEEEen_US


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