Abstract: As the 3D datasets arc usually in large scalar, the capability of a single CPU to rendering is not sufficient to achieve interactivity. Direct volume rendering via GPU has positioned itself as an efficient tool for the display and visual analysis of volumetric scalar fields. A rapid PC hardware based visualization method for largcscale datasets method was proposed. At last we demonstrated the effectiveness of our method with several data sets. It was proved that the proposed method can generate high-duality visual representations on normal PC.

Key words: GPU(Graphic Processing Unit),Largcscale datascts,Ray casting