This study focused on the operation of the RIT Digital Imaging and Remote Sensing Lab's synthetic image generation (DIRSIG) software model in the 0.4 to 1.0 urn wavelength region. The overall intent was to create a baseline for future DIRSIG activity. This was achieved by modifying the infrared based software to account for the characteristics of visible energy, and then evaluating the model's overall performance. A modification was made to the model's radiance algorithm by dividing surface reflectivity into a combination of view angle dependent diffuse and specular components. Additionally a practical method was developed for generating these values. Performance evaluation of the model was accomplished by collecting truth data from an actual scene, generating an applicable reflectivity database, synthetically generating images of the scene, and then comparing the image data with the truth data. The generated images provided a good representation of the visible energy interactions occurring in a scene.
Library of Congress Subject Headings
Infrared imaging--Computer simulation; Infrared technology--Simulation methods; Remote sensing--Data processing; Image processing--Digital techniques
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
Stark, Richard, "Synthetic image generator model: Application of specular and diffuse reflectivity components and performance evaluation in the visible region" (1993). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus