Browsing by Subject "Graphics processing unit (GPU)"

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    Direct volume rendering of unstructured tetrahedral meshes using CUDA and OpenMP
    (2014) Okuyan, E.; Güdükbay, Uğur
    Direct volume visualization is an important method in many areas, including computational fluid dynamics and medicine. Achieving interactive rates for direct volume rendering of large unstructured volumetric grids is a challenging problem, but parallelizing direct volume rendering algorithms can help achieve this goal. Using Compute Unified Device Architecture (CUDA), we propose a GPU-based volume rendering algorithm that itself is based on a cell projection-based ray-casting algorithm designed for CPU implementations. We also propose a multicore parallelized version of the cell-projection algorithm using OpenMP. In both algorithms, we favor image quality over rendering speed. Our algorithm has a low memory footprint, allowing us to render large datasets. Our algorithm supports progressive rendering. Wecompared the GPU implementation with the serial and multicore implementations.We observed significant speed-ups that, together with progressive rendering, enables reaching interactive rates for large datasets. © Springer Science+Business Media New York 2013.