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Proceedings Paper

Simulation methodology using photographic terrain and rendered objects
Author(s): Stephen Dow; Kevin Shelledy
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Paper Abstract

We describe a simulation which has been developed over the last couple years for weapons trainers, in which a gunner can pan across a terrain scenario containing moving military vehicles. The terrain imagery is obtained by stitching together a panorama from photographs. Associated with this imagery are a wireframe model of the ground and a range image incorporating both the ground and other objects in the scene. This data allows military vehicles to be rendered at the correct scale and aspect for insertion in the scene, with occlusion by photographic scene objects as appropriate. Controls for contrast, brightness, and focus adjustment which are part of the weapons systems are included in the simulation, as well as rudimentary environmental effects. Achieving real-time performance with smooth user interaction on standard PC hardware posed some challenges. Our methodology assigns some of the processing steps and partial result storage to the graphics card, and others to the system CPU and memory. The methodology also makes frequent use of precomputed and previous fame partial results, so that most frames do not require all the processing step to be applied to the whole visible area. We present an overview of the frame construction methodology, and discuss in more detail the scheme for background precomputation of focus processing results.

Paper Details

Date Published: 23 August 2001
PDF: 8 pages
Proc. SPIE 4368, Visualization of Temporal and Spatial Data for Civilian and Defense Applications, (23 August 2001); doi: 10.1117/12.438111
Show Author Affiliations
Stephen Dow, Univ. of Alabama in Huntsville (United States)
Kevin Shelledy, U.S. Army Aviation and Missile Command (United States)


Published in SPIE Proceedings Vol. 4368:
Visualization of Temporal and Spatial Data for Civilian and Defense Applications
Glenn O. Allgood; Nickolas L. Faust; Glenn O. Allgood, Editor(s)

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