A Comparison of Error Indicators for Multilevel Visualization on Nested Grids
نویسندگان
چکیده
Multiresolution visualization methods have recently become an indispensable ingredient of real time interactive post processing. Here local error indicators serve as criteria where to reene the data representation on the physical domain. In this article we give an overview on diierent types of error measurement on nested grids and compare them for selected applications in 2D as well as in 3D. Furthermore, it is pointed out that a certain saturation of the considered error indicator plays an important role in multilevel visualization and can be reused for the evaluation of data bounds in hierarchical searching or for a multilevel backface culling of isosurfaces.
منابع مشابه
Error indicators for multilevel visualization and computing on nested grids
Nowadays computing and post processing of simulation data is often based on ee-cient hierarchical methods. While multigrid methods are already established standards for fast simulation codes, multiresolution visualization methods have only recently become an important ingredient of real{time interactive post processing. Both methodologies use local error indicators which serve as criteria where...
متن کاملMultiresolutional Parallel Isosurface Extraction based on Tetrahedral Bisection
Nowadays, multiresolution visualization methods become an indispensable ingredient of real time interactive post processing. We will here present an eecient approach for tetrahedral grids recursively generated by bisection, which is based on a more general method for arbitrary nested grids. It especially applies to regular grids, the hexahedra of which are procedurally subdivided into tetrahedr...
متن کاملMultilevel Fictitious Space Preconditioner for Nonconforming Approximations on Unstructured Regular Triangulations
In the multidimensional numerical simulation of physical processes many phenomena are suuciently localized and it is obvious that adap-tive local grid reenement techniques are necessary to resolve the local physical behavior. For this reason the nite element discretiza-tions are often considered on the non-hierarchical unstructured meshes which permit to reduce the number of degrees of freedom ...
متن کاملReflections on QuestVis: A Visualization System for an Environmental Sustainability Model
We present lessons learned from the iterative design of QuestVis, a visualization interface for the QUEST environmental sustainability model. The QUEST model predicts the effects of policy choices in the present using scenarios of future outcomes that consist of several hundred indicators. QuestVis treats this information as a high-dimensional dataset, and shows the relationship between input c...
متن کاملOptimal-order Nonnested Multigrid Methods for Solving Finite Element Equations Ii: on Non-quasi-uniform Meshes
Nonnested multigrid methods are proved to be optimal-order solvers for finite element equations arising from elliptic problems in the presence of singularities caused by re-entrant corners and abrupt changes in the boundary conditions, where the multilevel grids are appropriately refined near singularities and are not necessarily nested. Therefore, optimal and realistic finer grids (compared wi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999