Multiscale analysis of thermography imaging dynamic for sol-gel coating discrimination
نویسنده
چکیده
Infrared thermography is a non-destructive method that is becoming attractive due to its ability to inspect noninvasively large areas in short times. This work demonstrates that the analysis of the thermographic response of coating layer can be greatly improved with a multiscale decomposition. Based on 2D discrete wavelets transform, effective scales in the thermographic responses of samples can be selected. Then, the dynamic thermal response was analyzed using cross-correlation measure. Results show that thermal transient images obtained with this decomposition, during both excitation and cooling step, provide important information for detecting the presence of the sol-gel coating.
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