Title :
Adaptive extraction of time-varying isosurfaces
Author :
Gregorski, Benjamin ; Senecal, Joshua ; Duchaineau, Mark A. ; Joy, Kenneth I.
Author_Institution :
Center for Appl. Sci. Comput., Lawrence Livermore Nat. Lab., CA, USA
Abstract :
We present an algorithm for adaptively extracting and rendering isosurfaces from compressed time-varying volume data sets. Tetrahedral meshes defined by longest edge bisection are used to create a multiresolution representation of the volume in the spatial domain that is adapted overtime to approximate the time-varying volume. The reextraction of the isosurface at each time step is accelerated with the vertex programming capabilities of modern graphics hardware. A data layout scheme which follows the access pattern indicated by mesh refinement is used to access the volume in a spatially and temporally coherent manner. This data layout scheme allows our algorithm to be used for out-of-core visualization.
Keywords :
computational geometry; computer graphic equipment; data visualisation; feature extraction; mesh generation; rendering (computer graphics); surface fitting; very large databases; data layout scheme; graphics hardware; isosurface visualization; mesh refinement; multiresolution techniques; out-of-core visualization; spatial domain; tetrahedral meshes; time-varying isosurfaces; time-varying volume data sets; vertex programming; Acceleration; Clustering algorithms; Data mining; Data visualization; Graphics; Hardware; Isosurfaces; Layout; Runtime; Spatial resolution; 65; Index Terms- Isosurfaces; large isosurface visualization; multiresolution techniques; out-of-core visualization.; time-varying isosurfaces; time-varying visualization;
Journal_Title :
Visualization and Computer Graphics, IEEE Transactions on
DOI :
10.1109/TVCG.2004.35
