15 March 1996 Infrared thermography: nonplanar inspection
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Abstract
Nondestructive evaluation by active infrared thermography allows detection of subsurface defects. In some instances however, such defect detection is perturbed by the geometry of the object. Thermal variations caused by object shape alter significantly the detection's performance because it may become difficult to distinguish between a defect and a shape variation (especially if a single image is analyzed). This paper presents a method which allows, from a single infrared image acquired right after the pulse thermal stimulation, to evaluate the shape of a nonplanar object and then apply a correction on subsequent thermograms in the time sequence in order to increase the reliability of defect detection.
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Jean-Francois Pelletier, Jean-Francois Pelletier, Xavier P. Maldague, Xavier P. Maldague, "Infrared thermography: nonplanar inspection", Proc. SPIE 2766, Thermosense XVIII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (15 March 1996); doi: 10.1117/12.235384; https://doi.org/10.1117/12.235384
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