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Proceedings Paper

Photorealistic imaging of digital terrains, free forms, and thematic textures in real-time visualization system Voxel-Volumes
Author(s): Sergei I. Vyatkin; Boris S. Dolgovesov; Valerie V. Ovechkin; Sergei E. Chizhik
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Paper Abstract

This paper highlights only three significant aspects of the proposed visualization system which features a lot of advanced techniques intended to synthesize a highly realistic visual environment for a diverse set of applications. The geometric model is based on non-polygonal representation, however it does support traditional objects, i.e. polygonal models could also be reconstructed and visualized. All geometric objects are uniformly and efficiently processed on dedicated hardware which implements the most specific and computationally excessive operations. Volume oriented rasterization algorithm and uniformity of object processing result in an efficient hidden surface removal and detection of spatial collisions. Chosen representation of terrain data is based on regular elevation map complemented with levels of detail. This approach has several advantages (rapid generation and modification, efficient data storing and retrieving) over polygomzed terrain models. Set of geometric objects is extended by freeform surfaces which simplify composition of smooth complex objects and simultaneously decrease data needed for storing them. To decorate surface of terrain thematic textures are used. It is supposed that observer is not often interested in the exact photographic information about the wide areas covered, for instance, by forest, water, etc., so that the benefits of photographic texture can be obtained by composing a number of patterns called "themes" to produce a final texture of the specific area. The goal of using thematic textures is to abolish the need of the global area texture, and additionally, animation features become available by simple means. Keywords: freeform surfaces, recursive multilevel ray casting, shape texture, volume visualization.

Paper Details

Date Published: 15 July 1997
PDF: 7 pages
Proc. SPIE 3085, Modeling, Simulation, and Visualization of Sensory Response for Defense Applications, (15 July 1997); doi: 10.1117/12.280989
Show Author Affiliations
Sergei I. Vyatkin, Institute of Automation and Electrometry (Russia)
Boris S. Dolgovesov, Institute of Automation and Electrometry (Russia)
Valerie V. Ovechkin, Institute of Automation and Electrometry (Russia)
Sergei E. Chizhik, Institute of Automation and Electrometry (Russia)

Published in SPIE Proceedings Vol. 3085:
Modeling, Simulation, and Visualization of Sensory Response for Defense Applications
John D. Illgen; Nickolas L. Faust; John D. Illgen, Editor(s)

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