Current developments in digital image coding tend to involve more and more complex algorithms. Overall compression performance can be improved by decomposing the image into regions and applying, for each region, the algorithm best suited to encode the region. Such schemes are referred to as dynamic coding schemes. However, this implies an algorithm selection phase. Current selection methods req...

1047-3203/$ see front matter 2012 Elsevier Inc. A doi:10.1016/j.jvcir.2012.01.015 ⇑ Corresponding author. E-mail address: [email protected] (C.-J. Tsai). In this paper, we propose a perceptual-based distributed video coding (DVC) technique. Unlike traditional video codecs, DVC applies video prediction process at the decoder side using previously received frames. The predicted video frames (...

This paper addresses the issue of 3-D motion estimation in model-based facial image coding. A new approach to estimating the motion of the head and the facial expressions is presented and has the following characteristics: 1) An affine nonrigid motion model is set up. The specific knowledge about facial shape and facial expression is formulated by this model in the form of parameters. This affi...

This article presents a complete still image coder for gray scale images. The coder is based on segmenting the image into homogeneous objects which are coded independently. The coder consist of three parts: segmentation, edge coding and texture coding. The segmentation is done by using mathematical morphology. The segments are then coded by representing the edges between segments by a chain cod...

| This paper presents a region-based coding algorithm for video sequences. The coding approach involves a time-recursive segmentation relying on the pixels ho-mogeneity, a region-based motion estimation, and motion compensated contour and texture coding. This algorithm is mainly devoted to very low bit rate video coding applications. One of the important features of the approach is that no assu...

Model based coding is a promising very low bit rate video coding technique. The idea behind model-based coding is to parameterize a talking head, and then to extract and transmit the parameters describing the facial movements, such as the facial expressions and the head motion to the receiver. At the receiver, the parameters are used to control face animation in order to reconstruct the talking...