Theses and Dissertations from UMD

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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.Dinaburg, Joshua BenjaminSubject: search.filters.subject.metrology

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    Development of a display screen correlation metric for thermal imaging cameras
    (2007-05-11) Dinaburg, Joshua Benjamin; Jackson, Gregory; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Thermal imaging cameras detect infrared radiation to semi-quantitatively determine the thermal profile of the surroundings. Previously, no standard performance measurements have been established for thermal imaging cameras applications such as search and rescue and firefighting. The spatial contrast resolution in realistic atmospheric conditions was assessed through various full scale fires. Absorbing gas-phase combustion products greatly affected the ability of the TIC to measure local contrast in temperatures as a function of spatial frequency. A test was developed using a thermal gradient target to relate the voltage ramp output signal recorded in 8 bit digital tape format to the luminance projected by the LCD screen profile measured by a 16 bit CCD camera array with an IR filter. These relationship were nonlinear and unique to each imager tested. Measurements of the output signal only do not describe the final performance and a complete standard performance evaluation must measure the display luminance.