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Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects

With increased use of light-weight materials with low factors of safety, non-destructive testing becomes increasingly important. Thanks to the advancement of infrared camera technology, pulse thermography is a cost efficient way to detect subsurface defects non-destructively. However, currently avai...

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Autores principales: Schager, Alexander, Zauner, Gerald, Mayr, Günther, Burgholzer, Peter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8321138/
https://www.ncbi.nlm.nih.gov/pubmed/34460753
http://dx.doi.org/10.3390/jimaging6090096
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author Schager, Alexander
Zauner, Gerald
Mayr, Günther
Burgholzer, Peter
author_facet Schager, Alexander
Zauner, Gerald
Mayr, Günther
Burgholzer, Peter
author_sort Schager, Alexander
collection PubMed
description With increased use of light-weight materials with low factors of safety, non-destructive testing becomes increasingly important. Thanks to the advancement of infrared camera technology, pulse thermography is a cost efficient way to detect subsurface defects non-destructively. However, currently available evaluation algorithms have either a high computational cost or show poor performance if any geometry other than the most simple kind is surveyed. We present an extension of the thermographic signal reconstruction technique which can automatically segment and image defects from sound areas, while also estimating the defect depth, all with low computational cost. We verified our algorithm using real world measurements and compare our results to standard active thermography algorithms with similar computational complexity. We found that our algorithm can detect defects more accurately, especially when more complex geometries are examined.
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spelling pubmed-83211382021-08-26 Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects Schager, Alexander Zauner, Gerald Mayr, Günther Burgholzer, Peter J Imaging Article With increased use of light-weight materials with low factors of safety, non-destructive testing becomes increasingly important. Thanks to the advancement of infrared camera technology, pulse thermography is a cost efficient way to detect subsurface defects non-destructively. However, currently available evaluation algorithms have either a high computational cost or show poor performance if any geometry other than the most simple kind is surveyed. We present an extension of the thermographic signal reconstruction technique which can automatically segment and image defects from sound areas, while also estimating the defect depth, all with low computational cost. We verified our algorithm using real world measurements and compare our results to standard active thermography algorithms with similar computational complexity. We found that our algorithm can detect defects more accurately, especially when more complex geometries are examined. MDPI 2020-09-11 /pmc/articles/PMC8321138/ /pubmed/34460753 http://dx.doi.org/10.3390/jimaging6090096 Text en © 2020 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Schager, Alexander
Zauner, Gerald
Mayr, Günther
Burgholzer, Peter
Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title_full Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title_fullStr Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title_full_unstemmed Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title_short Extension of the Thermographic Signal Reconstruction Technique for an Automated Segmentation and Depth Estimation of Subsurface Defects
title_sort extension of the thermographic signal reconstruction technique for an automated segmentation and depth estimation of subsurface defects
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8321138/
https://www.ncbi.nlm.nih.gov/pubmed/34460753
http://dx.doi.org/10.3390/jimaging6090096
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