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Der Aufsatz berichtet über europäische und deutsche Vorarbeiten für die Neufassung des Eurocode 7 „Geotechnik“ (EN 1997). Eine besondere Rolle nahm dabei die Initiative PraxisRegelnBau (PRB) mit der Projektgruppe Geotechnik (PG6) ein, die gleichzeitig auch Arbeitskreis der beiden Arbeitsausschüsse des DIN ist, die für die beiden Teile der EN 1997 als Spiegelausschüsse zuständig sind. Schwerpunkte...
ISO recently published a new image compression standard, JPEG XT, which extends the popular JPEG standard towards higher dynamic range, compression of alpha channels and lossless coding. In part 7 ofJPEG XT, a two-layer lossy image compression for HDR images isintroduced that reconstructs HDR signals by the combination of a baselayer following the legacy JPEG standard, and an extension layer thatenlarges...
The upcoming JPEG XT standard for High Dynamic Range (HDR) images defines a common framework for the lossy and lossless representation of high-dynamic range images. It describes the decoding process as the combination of various processing tools that can be combined freely. In this paper we analyze the coding efficiency of different decoding tools through a large scale objective quality testing using...
Despite its age, JPEG (formally, Rec. ITU-T T.81 — ISO/IEC 10918-1) is still the omnipresent image file format for lossy compression of photographic images. While its rate-distortion performance is not competitive with state-of-the-art schemes like JPEG 2000 or HEVC, manifold techniques have been developed over the years to improve its compression performance. This article provides a short review...
The Joint Photographic Experts Group recently produced a new standard, JPEG eXTension. JPEG XT is both backward-compatible with legacy JPEG and offers the ability to encode images of higher precision and higher dynamic range, and in lossy or lossless modes. Here, the authors shed some light on the recent developments of the JPEG committee and discuss both the current status of JPEG XT and its future...
Recent advances in high dynamic range (HDR) capturing and display technologies attracted a lot of interest to HDR imaging. Many issues that are considered as being resolved for conventional low dynamic range (LDR) images pose new challenges in HDR context. One such issue is a lack of standards for HDR image compression. Another is the limited availability of suitable image datasets that are suitable...
The issue of backwards compatible image and video coding gained some attention in both MPEG and JPEG, let it be as extension for HEVC, let it be as the JPEG XT standardization initiative of the SC29WG1 committee. The coding systems work all on the principle of a base layer operating in the low-dynamic range regime, using a tone-mapped version of the HDR material as input, and an extension layer invisible...
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