Speeding up Multi-Isosurface Extraction based on Multi-Active Node Searching

Abstract

Multi-isosurface extraction plays an important role in scientific data analysis. However, the existing isosurface extraction methods aim to speed up the extraction of single isosurface. In this paper, we propose an acceleration algorithm of multi-isosurface extraction based on multi-active node searching, which can extract multiple isosurfaces simultaneously and efficiently. Based on improving the BONO extraction algorithm, our algorithm can significantly reduce the number of nodes to be accessed in the process of searching active nodes, and thus time cost can be reduced obviously. We also propose the concept of active factor to research the relationship between multi-active node and acceleration effect. Experimental results show that the BONO_Multi algorithm we proposed has a significant acceleration effect compared with the existing methods, especially for the large data and numerous isosurfaces.