VG10: Eurographics/IEEE VGTC on Volume Graphics
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Browsing VG10: Eurographics/IEEE VGTC on Volume Graphics by Subject "Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Picture/Image Generation-Display Algorithms; E.4 [Coding and Information Theory]: Data Compaction and Compression."
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Item A GPU-Supported Lossless Compression Scheme for Rendering Time-Varying Volume Data(The Eurographics Association, 2010) Mensmann, Jörg; Ropinski, Timo; Hinrichs, Klaus; Ruediger Westermann and Gordon KindlmannSince the size of time-varying volumetric data sets typically exceeds the amount of available GPU and main memory, out-of-core streaming techniques are required to support interactive rendering. To deal with the performance bottlenecks of hard-disk transfer rate and graphics bus bandwidth, we present a hybrid CPU/GPU scheme for lossless compression and data streaming that combines a temporal prediction model, which allows to exploit coherence between time steps, and variable-length coding with a fast block compression algorithm. This combination becomes possible by exploiting the CUDA computing architecture for unpacking and assembling data packets on the GPU. The system allows near-interactive performance even for rendering large real-world data sets with a low signal-to-noise-ratio, while not degrading image quality. It uses standard volume raycasting and can be easily combined with existing acceleration methods and advanced visualization techniques.