Three-dimensional longwave infrared synthetic image generation incorporating angular emissivity effects using ray-tracing techniques

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Title: Three-dimensional longwave infrared synthetic image generation incorporating angular emissivity effects using ray-tracing techniques
Author: Shor, Eric; Salvaggio, Carl; Schott, John
Abstract: A technique for longwave infrared (LWIR) synthetic image generation (510) is shown which yields improved radiomeiric accuracy in the 8-14 .tm bandpass. This process uses a modified LOWTRAN 6 atmospheric transmission/upwelled radiance code and computer graphics ray-tracing techniques. A scene is created by placing faceted objects into world coordinates with rotation, translation, and scaling parameters. Each facet is assigned a material index and temperature. The material index points to optical properties for that material. The modified LOWTRAN 6 code incorporates sensor response function when computing tables of the atmospheric transmission and upwelled and downwelled radiances. A ray-traced image is then generated. A final synthetic LWIR scene is generated to geometrically match an actual acquired scene so that radiometric comparisons can be made.
Description: RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
Record URI: http://hdl.handle.net/1850/4357
Publishers URL: http://dx.doi.org/10.1117/12.23080
Date: 1990-11

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