Athanassios S. Poulakidas

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DAP (Distributed Algorithms Platform) is a generic andhomogeneous simulation environment aiming at the implementation,simulation, and testing of distributed algorithmsfor wired and wireless networks. In this work, we presentits architecture, the most important design decisions, anddiscuss its distinct features and functionalities. DAP allowsthe algorithm(More)
WWW-based Internet information service has grown enormously during the last few years, and major performance bottlenecks have been caused by WWW server and Internet bandwidth inadequacies. Utilizing client-site computing power and also multi-processor support at the server site can substantially improve the system response time. In this paper, we examine(More)
s for papers presented at the the Space and Earth Science Data Compression session that are listed below appear in the DCC ‘96 poster section. Another abstract for this session appears on the following page. “Compression of Aerial Ortho Images Based on Image Denoising” A. Langi and W. Kinsner University of Manitoba and TRLabs, Canada “Global and Local(More)
Wavelet transforms, when combined with quantization and a suitable encoding, can be used to compress images eeectively. In order to use them for image library systems, a compact storage scheme for quantized coeecient wavelet data must be developed with a support for fast subregion retrieval. We have designed such a scheme and in this paper we provide(More)
In an image browsing environment there is need for a design that allows viewing image subregions in progressively higher resolutions. We describe a storage scheme that accomplishes good image compression ratios, while providing fast image subre-gion retrieval in various resolutions. This storage scheme is applied on the quantized coeecient matrices obtained(More)
In an image browsing environment there is need for progressively viewing image subregions at various resolutions. We describe a storage scheme that accomplishes good image compression, while supporting fast image subregion retrieval. We evaluate analytically and experimentally the compression performance of our algorithm. We also provide results on the(More)
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