Dynamic Isosurface Extraction and Level-of-Detail in Voxel Space

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Description

A new visualization representation is described, which dramatically improves interactivity for scientific visualizations of structured grid data sets by creating isosurfaces at interactive speeds and with dynamically changeable levels-of-detail (LOD). This representation enables greater interactivity by allowing an analyst to dynamically specify both the desired isosurface threshold and required level-of-detail to be used while rendering the image. A scientist can therefore view very large isosurfaces at interactive speeds (with a low level-of-detail), but has the full data set always available for analysis. The key idea is that various levels-of-detail are represented as differently sized hexahedral virtual voxels, which are stored ... continued below

Physical Description

25 p.

Creation Information

Lamphere, P.B. & Linebarger, J.M. March 1, 1999.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

A new visualization representation is described, which dramatically improves interactivity for scientific visualizations of structured grid data sets by creating isosurfaces at interactive speeds and with dynamically changeable levels-of-detail (LOD). This representation enables greater interactivity by allowing an analyst to dynamically specify both the desired isosurface threshold and required level-of-detail to be used while rendering the image. A scientist can therefore view very large isosurfaces at interactive speeds (with a low level-of-detail), but has the full data set always available for analysis. The key idea is that various levels-of-detail are represented as differently sized hexahedral virtual voxels, which are stored in a three-dimensional binary tree, or kd-tree; thus the level-of-detail representation is done in voxel space instead of the traditional approach which relies on surface or geometry space decimations. Utilizing the voxel space is an essential step to moving from a post-processing visualization paradigm to a quantitative, real-time paradigm. This algorithm has been implemented as an integral component of the EIGEN/VR project at Sandia National Laboratories, which provides a rich environment for scientists to interactively explore and visualize the results of very large-scale simulations performed on massively parallel supercomputers.

Physical Description

25 p.

Notes

OSTI as DE00005649

Medium: P; Size: 25 pages

Source

  • Other Information: PBD: 1 Mar 1999

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  • Report No.: SAND98-1224 Revised
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/5649 | External Link
  • Office of Scientific & Technical Information Report Number: 5649
  • Archival Resource Key: ark:/67531/metadc694729

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Creation Date

  • March 1, 1999

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 10, 2017, 6:05 p.m.

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Lamphere, P.B. & Linebarger, J.M. Dynamic Isosurface Extraction and Level-of-Detail in Voxel Space, report, March 1, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc694729/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.