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The most commonly used approaches for volume visualization include the extraction and rendering of isosurfaces or direct volume rendering (DVR). For DVR splatting, 3D texture mapping and raycasting are typically used. In this project we investigate fast splatting or raycasting based DVR techniques and have developed new layered, hardware-accelerated volume splatting algorithm. Layered volume splatting combines the speed benefits of fast axis-aligned pre-classified sheet-buffer splatting while at the same time exhibiting display quality comparable to high-quality post-classified view-aligned sheet-buffer splatting. In contrast to previous splatting methods, we exploit the original exponential extinction coefficient to achieve a better approximation of the volume rendering integral.
