Eric H. Shor

Abstract

A technique for thermal infrared (8-14 micrometers) synthetic image generation (SIG) was demonstrated that yields improved radiometric accuracy. This process utilizes the LOWTRAN 6 atmospheric propagation model 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. This index points to angular emissivity data for that material. LOWTRAN 6 can incorporate a sensor response function when calculating data files for the atmospheric transmission, upwelled and downwelled radiances, and temperature-to-radiance conversions. Ray-traced imagery is generated and discussed. The image is then further processed using convolution to represent the modulation transfer function of the imaging system. The final infrared synthetic image is then compared to an actual thermal image. An average apparent temperature difference of 2.50C is reported with a 1.52C standard deviation. These temperatures fall within predicted error analysis limits.

Library of Congress Subject Headings

Infrared imaging; Infrared technology; Three-dimensional display systems; Remote sensing--Data processing; Computer simulation

Publication Date

5-16-1990

Document Type

Thesis

Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)

Advisor

Schott, John

Advisor/Committee Member

Salvaggio, Carl

Advisor/Committee Member

Fairchild, Mark

Comments

Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TA1570 .S565 1990

Campus

RIT – Main Campus

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