Model-based coding of videophone images
- 1 January 1991
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics & Communication Engineering Journal
- Vol. 3 (1) , 29-36
- https://doi.org/10.1049/ecej:19910006
Abstract
The requirement for improved picture quality in videophone and videoconference systems operating at low bit-rates has stimulated interest in model-based image coding. In this paper, two model-based coding techniques are described which are capable of producing either improved picture quality at bit-rates around 64 kbit/s or acceptable picture quality at bit-rates far lower than 64 kbit/s. The first technique produces facial expressions by using feature code-books; the second technique produces facial expressions by distorting an underlying three-dimensional model. The problems of image analysis and synthesis, which are concomitant in model-based coding, are discussed.Keywords
This publication has 1 reference indexed in Scilit:
- Facial Action Coding SystemPublished by American Psychological Association (APA) ,1978