Vector quantization based shear-warped volume rendering

Volume rendering based on vector quantization can take advantage of code book to render directly from the compressed data, while other approaches have to decompress the codes before rendering. New method can not only reduce the storage, but also speed up the rendering process. However, it reveals the short coming that the projected pixmap can not be widely used for every code index in the volume, especially in perspective projection. To overcome this defect, we introduced Shear Warp transformation into the rendering process that makes use of the full advantage of vector quantization with high compression ratio and direct rendering from the compressed data, at the same time inherits the merits of shear-warp preprocessing with fast rendering speed and ability to deal with perspective projection. The approach proposed in the paper can get a nearly real-time interactive speed and can be used to render the volume data over web.EI06532-5361