11 May 1987 Image Processing Software For Real Time Quantitative Infrared Thermography
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Abstract
True temperature can be determined from infrared thermography provided the material emissivity and ambient irradiance are known. The measurement equations found in the literature are valid only if the scanner response is linear in radiance. Other complications arise if the emissivity depends on temperature. Spectral (or band) rather than total emissivity values should be used but are less often found in the literature. A new method, specimen calibration, avoids these problems by determining a calibration curve specific to the specimen and experimental arrangement. The computer program VDAS (Video Data Analysis System) automates the collection of calibration data, reduction to a calibration curve, and temperature measurement using the curve. The new method was tested on nylon 6/6 between 20 and 160° C and on 304L stainless steel between 30 and 500° C and was found to be significantly more accurate.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul Hughett, Paul Hughett, Elizabeth A. Fuchs, Elizabeth A. Fuchs, } "Image Processing Software For Real Time Quantitative Infrared Thermography", Proc. SPIE 0780, Thermosense IX: Thermal Infrared Sensing for Diagnostics and Control, (11 May 1987); doi: 10.1117/12.940512; https://doi.org/10.1117/12.940512
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