Roberto Grosso

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Multilevel representations and mesh reduction techniques have been used for accelerating the processing and the rendering of large datasets representing scalar or vector valued functions defined on complex 2 or 3 dimensional meshes. We present a method based on finite element approximations which combines these two approaches in a new and unique way that is(More)
A multiresolution data decomposition offers a fundamental framework supporting compression, progressive transmission , and level-of-detail (LOD) control for large two or three dimensional data sets discretized on complex meshes. In this paper we extend a previously presented algorithm for 3D mesh reduction for volume data based on multilevel finite element(More)
An algorithm for adaptive refinement of 3D-meshes is outlined. This algorithm is very convenient for the generation of mesh hierarchies used for efficient volume visualiza-tion algorithms, e.g. iso-surface extraction or direct volume rendering, and for multilevel finite element computations. The aim was to construct an algorithm which generates as little(More)
We present a method for discretizing 3D-space in order to make it accessible for handling numerical problems , e.g. for simulation or visualization. Our algorithm generates a hierarchy of 3D meshes. It allows adaptive subdivision, driven by a user speciied local error control. Each 3D mesh consists of tetrahedra and octahedra having a minimal number of(More)