Vicente González Ruiz

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—This paper describes and analyzes JPIP-W, an innovative proposal for the interactive transmission of JPEG2000 images on the Internet. JPIP-W is an extension of JPIP, the current JPEG protocol proposed for interactive JPEG2000 image browsing. One of the JPIP characteristics of greatest interest is its ability to use the Web for retrieving images. However,(More)
—Hyperspectral data lossy compression has not yet achieved global acceptance in the remote sensing community, mainly because it is generally perceived that using compressed images may affect the results of posterior processing stages. This possible negative effect, however, has not been accurately characterized so far. In this letter, we quantify the impact(More)
In this work several different strategies for image compression and progressive transmission are analyzed and evaluated. It will be shown that the simplest wavelet transform (Unitary Sequential Transform, UST) with a spatial predictor (U(S+P)T) followed by the so-called Set Partitioning In Hierarchical Trees (SPIHT) coder is a very good lossless compressor(More)
This work presents a rigorous and objective evaluation of two progressive image transmission techniques in a framework of telemicroscopy of biological specimens. First of all, a Lossless Progressive Image Codec (LPIC) which is based on a specific wavelet transform and an efficient encoding method is introduced. This system is then compared to the standard(More)
This paper proposes an efficient prefetching strategy for interactive remote browsing of sequences of high resolution JPEG 2000 images. As a result of the inherent latency of client-server communication, the experiments of this study prove that a significant benefit, can be achieved, in terms of both quality and responsiveness, by anticipating certain data(More)
To account for differences among rural and urban regions, the OECD has established a regional typology, classifying TL3 regions as predominantly urban (PU), intermediate (IN) or predominantly rural (PR). This typology has proved to be meaningful to better explain regional differences in economic and labour market performance. However, it does not take into(More)