Tauradj Ebrahimi

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JPEG 2000, the new ISO/ITU-T standard for still image coding, is about to be finished. Other new standards have been recently introduced, namely JPEG-LS and MPEG-4 VTC. This paper compares the set of features offered by JPEG 2000, and how well they are fulfilled, versus JPEG-LS and MPEG-4 VTC, as well as the older but widely used JPEG and more recent PNG.(More)
We propose a novel technique for coding of texture and three-dimensional data which takes the viewer position into account. This allows to transmit only the most visible parts of information that is needed to render a virtual scene. The rendering operation is modelled and studied using filtering and sampling theory. The technique is applied on real data and(More)
This deliverable details the application scenarios for which DVC may bring major benefits, highlighting the expected advantages for each scenario. In particular, the functionalities usually identified in the literature as DVC strengths, such as error resilience, encoder-decoder complexity trade-off, low-power encoder consumption, but also coding efficiency(More)
In order to satisfy the needs of new applications in a multi-resolution environment the problem of object{ oriented coding has to be addressed. In this paper two main approaches are presented to tackle this problem. First, an algorithm for shape coding is presented. It is based on a chain coding algorithm where powerful modeling techniques are used to(More)
Replica detection is an important prerequisite for the discovery of copyright infringement and detection of illicit content. For this purpose, content-based image protection can be an efficient alternative to watermarking. Rather than imperceptibly embedding a signal, content-based systems rely on image similarity. Certain content-based systems use binary(More)
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