Description
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.
Date of creation, presentation, or exhibit
11-1-1990
Document Type
Conference Paper
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
Recommended Citation
Eric H. Shor, Carl Salvaggio, John R. Schott, "Three-dimensional longwave infrared synthetic image generation incorporating angular emissivity effects using ray-tracing techniques", Proc. SPIE 1341, Infrared Technology XVI, (1 November 1990); doi: 10.1117/12.23080; https://doi.org/10.1117/12.23080
Campus
RIT – Main Campus
Comments
Copyright 1990 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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