Enhancement of open-cracks detection using a principal component analysis/wavelet technique in photothermal nondestructive testing
Enhancement of open-cracks detection using a principal component analysis/wavelet technique in photothermal nondestructive testing
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DOI：
10.21611/qirt.2002.002
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Hermosilla-Lara;P. Joubert;D. Placko;F. Lepoutre;M. Piriou
中科院分区：
文献类型：
--
作者：
S. Hermosilla-Lara;P. Joubert;D. Placko;F. Lepoutre;M. Piriou
In this paper, the images provided by a flying-spot camera dedicated to open-crack detection are considered. In this contribution, the authors focus on the enhancement of open-crack detection performances in the case of severe surface conditions. After a short description of the principle of the device, the tested structure and the obtained photothermal images are presented. The images are then processed thanks to a modified principal component analysis which allows to separate the thermal and optical effects from the raw images. The detection is then carried out and the performances are characterized thanks to Receiver Operating Characteristic curves.
