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Proceedings Paper

Thermal shadow modeling within a physically-based scene simulation
Author(s): J. Michael Cathcart
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Paper Abstract

The Electro-Optics & Physical Sciences Laboratory of the Georgia Tech Research Institute (GTRI) continues to develop a physically-based scene simulation in support of a variety of applications including human factors studies and electro-optical system analyses. Accurate simulation of a scene requires the reproduction of the scene component shadows onto the simulated landscape. Scene simulation in the mid- and far-infrared wavebands provides a particularly difficult challenge due to the inherent long-term time dependence of the thermal interactions which define the heat flows in the scene. This paper will address an approach investigated at GTRI for implementing a shadowing algorithm within the GTVISIT scene simulation software. The paper will discuss the algorithms devised for computing signatures for shadow regions and subsequent rendering of those regions on the background. Example imagery illustrating the results of the algorithms will be shown.

Paper Details

Date Published: 13 August 1993
PDF: 12 pages
Proc. SPIE 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III, (13 August 1993); doi: 10.1117/12.151047
Show Author Affiliations
J. Michael Cathcart, Georgia Tech Research Institute (United States)


Published in SPIE Proceedings Vol. 1967:
Characterization, Propagation, and Simulation of Sources and Backgrounds III
Wendell R. Watkins; Dieter Clement, Editor(s)

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