Accession Number : ADA320941

Title :   Extracting Features from 3D Unstructured Meshes for Interactive Visualization.

Descriptive Note : Contract rept.,

Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s) : Ma, Kwan-Liu ; Interrante, Victoria

PDF Url : ADA320941

Report Date : NOV 1996

Pagination or Media Count : 14

Abstract : This paper describes techniques, based on the extraction of geometric features, for facilitating the visualization and interactive manipulation of the typically very large and dense three-dimensional unstructured grids used in aerodynamics calculations. We discuss the difficulties that scientists currently face in efficiently and effectively displaying these meshes and propose methods for using geometric feature lines to clearly and concisely indicate the essential structural detail of the model while eliminating much of the unnecessary visual clutter. We describe the perceptual importance of specific viewpoint-dependent and view-independent features, discuss the practical implementation of simple but effective algorithms for identifying these features (taking into consideration both local and global criteria), and demonstrate the performance of each proposed technique on various types of data sets.

Descriptors :   *IMAGE PROCESSING, *FLOW VISUALIZATION, DATA BASES, ALGORITHMS, COMPUTATIONS, EDGES, OPTICAL IMAGES, SILHOUETTES.

Subject Categories : Cybernetics
      Optical Detection and Detectors
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE