@ARTICLE{Dudzik_Sebastian_Detection_2021, author={Dudzik, Sebastian and Dudek, Grzegorz}, volume={vol. 28}, number={No 1}, journal={Metrology and Measurement Systems}, pages={89-105}, howpublished={online}, year={2021}, publisher={Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation}, abstract={Active thermography is an efficient tool for defect detection and characterization as it does not change the properties of tested materials. The detection and characterization process involves heating a sample and then analysing the thermal response. In this paper, a long heating pulse was used on samples with a low thermal diffusivity and artificially created holes of various depths. As a result of the experiments, heating and cooling curves were obtained. These curves, which describe local characteristics of the material, are recognized using a classification tree and divided into categories depending on the material thickness (hole depths). Two advantages of the proposed use of classification trees are: an in-built mechanism for feature selection and a strong reduction in the dimensions of the pattern. Based on the experimental study, it can be concluded that classification trees are a useful tool for the thinning detection of homogeneous material.}, type={Article}, title={Detection of thinning of homogeneous material using active thermography and classification trees}, URL={http://www.czasopisma.pan.pl/Content/118923/PDF/art06.pdf}, doi={10.24425/mms.2021.135994}, keywords={active thermography, classification tree, defect detection and characterization, material thinning detection}, }