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| Wavelet Packet Analysis of Early Corrosion Image of Q235 Steel in Simulated Atmospheric Environment |
| HAN Xiabing, GAO Zhiming, DANG Lihua, WANG Ying, BI Huichao |
| School of Material Sciences and Engineering, Tianjin University, Tianjin 300072, China |
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Abstract The corrosion morphology of the Q235 steel in simulated atmospheric environment was obtained using the established image acquisition system. In order to gain the detailed information of the images, wavelet packet-based image analysis method was applied to decompose the improved images and energies of sub-images (according to the Shannon entropy standard to choose the optimal sub-images with high regularity) were extracted as characteristic information. The results showed that the corrosion extent of the Q235 steel specimens was qualitatively analyzed which correlated well with the change of the energies of sub-images. The relationship between the characteristic information and corrosion mass loss of the samples was evaluated by regression analysis. Using the equation given by the regression analysis, the corrosion degree of the Q235 steel specimens could be quantitatively analyzed.
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Cite this article:
HAN Xiabing,GAO Zhiming,DANG Lihua,WANG Ying,BI Huichao. Wavelet Packet Analysis of Early Corrosion Image of Q235 Steel in Simulated Atmospheric Environment. Journal of Chinese Society for Corrosion and protection, 2013, 33(3): 211-215.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2013/V33/I3/211
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