Traditionally, video encoders have been designed assuming that the more redundancy is removed, the better the encoder. However, on current laptops, reducing the compression efficiency of the video encoder by reducing the number of instructions used to perform compression can actually reduce the total energy used to encode and transmit a sequence. The correct balance between computation and comp...

Motion estimation has been shown to help signi cantly in the compression of video sequences. However, since most motion estimation algorithms require a large amount of computation, it is undesirable to use them in power constrained applications, such as battery operated wireless video terminals. This paper presents an approach to reducing the power dissipation of wireless video terminals in a n...

In order to jointly optimise the quality of video coding on one hand and video analysis on the other, this paper proposes a novel approach to enhance the reusable information content in compressed video domain. By introducing a hierarchical content driven motion estimation mechanism at the encoder, complemented by a statistical prediction of region-of-interest, this approach reduces the complex...

we define minimal cn-dominating graph $mathbf {mcn}(g)$, commonality minimal cn-dominating graph $mathbf {cmcn}(g)$ and vertex minimal cn-dominating graph $mathbf {m_{v}cn}(g)$, characterizations are given for graph $g$ for which the newly defined graphs are connected. further serval new results are developed relating to these graphs.

Human vision plays and important role in the areas of image processing. Without adequate and efficient human vision it is very hard to prove any computer vision related work successful. For better human vision, light and color plays most important roles. Gamma encoder is the one which is used to enhance the visualization property. However, depending on computer devices gamma encoder value varie...

Various studies [1,2] show that a basic architecture of MPEG2 transcoder consists of a cascaded decoder/encoder, shown in Figure 6. Such a transcoder re-uses the motion vectors (MVs) and minimizes the changes of macroblock (MB) mode. One interesting feature that can be added on this type of transcoder is to insert a translucent logo into the transcoded bit-stream.

We introduce a new way to use fractal coding for image compression, based on the parallel use of a fractal encoder and a DCT encoder. The two encoders are given the complementary roles to capture the information of edge and smooth variation, and the information of detail respectively. We show the advantage of using this hybrid coding scheme over the use of a fractal encoder alone, or a DCT enco...