@inproceedings{Shor1990_0,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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.},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Address = {San Diego, California, United States of America},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Author = {Eric H. Shor and Carl  Salvaggio and John R.  Schott},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Booktitle = {Proceedings of the SPIE, SPIE Annual Meeting, Thermal Imaging and Simulation, Infrared Technology XVI},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Keywords = {dirsig; lowtran; emissivity; ray-tracing},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Month = {July},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number = {},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Organization = {SPIE},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pages = {68--79},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Title = {Three-dimensional longwave infrared (LWIR) synthetic image generation incorporating angular emissivity effects using ray-tracing techniques},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Url = {http://www.cis.rit.edu/~cnspci/references/shor1990.pdf},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Volume = {1341},<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Year = {1990}}