Study on a method for suppressing influence of nonuniform surface emissivity of material in eddy current thermography
Source abstract
Abstract
The nonuniform emissivity of material surface will adversely affect the detection results of the thermal imaging technology. Aiming at the influence of uneven emissivity on the dynamic detection mode of eddy current thermography, a suppression method based on edge detection is proposed in this paper. Since the traditional threshold selection methods are not ideal, a local adaptive threshold selection (LATS) method is applied in this study. This method can automatically obtain the optimal threshold for edge detection to suppress the influence of uneven emissivity. Roberts, Sobel, Prewitt, and Canny operators are tested by using LATS. The results show that Roberts, Sobel, and Prewitt operators can achieve the suppression effect, but the effect of Sobel and Prewitt are similar and better than Roberts.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Thermography and Photoacoustic Techniques · Infrared Target Detection Methodologies · Image Processing Techniques and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Yantai Research Institute, Harbin Engineering University , Yantai, China
Funding
Yantai School-Locality Integration Development Project · Natural Science Foundation of Shandong Province
References (18)
Show source-provided references
1. Nondestructive evaluation of carbon fiber reinforced polymer (CFRP)-steel interfacial debonding using eddy current thermography10.1016/j.compstruct.2021.115133 ↗
2. DC-biased magnetization based eddy current thermography for subsurface defect detection10.1109/tii.2019.2891107 ↗
3. Characterisation and evaluation of paint-coated marine corrosion in carbon steel using eddy current pulsed thermography10.1016/j.ndteint.2022.102678 ↗
4. Nondestructive testing of resistance spot welds using eddy current thermography10.1364/AO.57.000D63 ↗
5. Reducing the effect of surface emissivity variation in eddy current pulsed thermography10.1109/jsen.2013.2294195 ↗
6. Survey of emissivity variability in thermography of urban areas10.1016/0034-4257(82)90043-8 ↗
7. Thermal radiation and the second law10.1016/j.energy.2009.10.024 ↗
8. Transient thermography as a through skin imaging technique for aircraft assembly: Modelling and experimental results10.1016/j.infrared.2003.07.002 ↗
9. Thermoinductive investigations of magnetic materials for surface cracks10.3166/qirt.1.33-46 ↗
10. Thermography pattern analysis and separation10.1063/1.4884644 ↗
11. Detection of hidden defects by lateral thermal flows10.1016/j.ndteint.2013.02.003 ↗
12. Image enhancement in transient lock-in thermography through time series reconstruction and spatial slope correction10.1109/tim.2011.2174095 ↗
13. Pulsed inductive thermal wave radar (PI-TWR) using cross correlation matched filtering in eddy current thermography10.1016/j.infrared.2015.06.004 ↗
14. Crack detection based on a moving mode of eddy current thermography method10.1016/j.measurement.2017.05.041 ↗
15. Methods for suppression of the effect of uneven surface emissivity of material in the moving mode of eddy current thermography10.1016/j.applthermaleng.2017.03.023 ↗
16. Respiratory mask selection and leakage detection system based on Canny edge detection operator10.1016/j.procs.2016.02.064 ↗
17. An improved Otsu threshold segmentation algorithm10.1504/IJCSE.2020.107266 ↗
18. Characteristic analysis of Otsu threshold and its applications10.1016/j.patrec.2011.01.021 ↗