Paper
23 June 2003 Video coding of model based at very low bit rates
XianPing Fu, Zhao Wang
Author Affiliations +
Proceedings Volume 5150, Visual Communications and Image Processing 2003; (2003) https://doi.org/10.1117/12.500193
Event: Visual Communications and Image Processing 2003, 2003, Lugano, Switzerland
Abstract
Very low bit rate coding is an important part of the MPEG-4 standard. To obtain maximum compression in videoconference sequences a technique called model-based coding can be used. With this technique, the face of the speaker is represented by a model, and its movement between frames is coded with a small set of parameters. As with all MPEG standards, the encoder algorithm is not described and this leaves the door open to many possible implementations. In this paper, a summary of model-based coding is presented. Many fields have been studied, including 3D wire-frame models, face detection, facial feature extraction, motion parameter estimation, and face model parameter coding. Several problems need to be solved before model-based video communication will become practical. Some of them are discussed in this paper, such as how to detect and locate a face in an image, how to extract parameters from an image to adapt a face model, and how to compress the animation parameters.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
XianPing Fu and Zhao Wang "Video coding of model based at very low bit rates", Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003); https://doi.org/10.1117/12.500193
Lens.org Logo
CITATIONS
Cited by 1 scholarly publication and 3 patents.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
3D modeling

Motion models

Model-based design

Facial recognition systems

Feature extraction

Solid modeling

Motion estimation

RELATED CONTENT

Model-based head tracking and 3D pose estimation
Proceedings of SPIE (September 24 1998)
3D-model-based head tracking
Proceedings of SPIE (January 10 1997)
Model-based image coding
Proceedings of SPIE (September 16 1994)
Model based image coding using deformable 3D model for face...
Proceedings of SPIE (September 21 1994)
Model-based multiple-sensor dynamic scene interpretation
Proceedings of SPIE (February 01 1992)

Back to Top