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Article type: Research Article
Authors: Li, Zongjian; | Zeng, Li; | Zou, Xiaobing; | Xiang, Caibing;
Affiliations: ICT Research Center, Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China, Chongqing University, Chongqing, China | College of Optoelectronic Engineering, Chongqing University, Chongqing, China | College of Mathematics and Physics, Chongqing University, Chongqing, China
Note: [] Corresponding author. Tel.: +86 023 86394828; Fax: +86 023 65103562; E-mail: drlizeng@hotmail.com
Abstract: As an advanced nondestructive testing (NDT) technology, industrial computed tomography (ICT) has been widely applied to diversified areas. In modern industry, ICT is especially useful for analyzing inner defects of complex and close work pieces. The common defects of work pieces include gas cavities, slag inclusions, cracks and shrinking cavities. Only cracks are often caused by fatigue usage. Precisely extracting a crack is important to estimate the remaining secure service time of the work piece. This paper presents a crack surface extraction method of ICT volume data based on finite plane integral transform (FPIT) and planelet. FPIT and planelet, as new methods of multiscale geometric analysis (MGA), have distinct discrimination for different plane singularities. Within the paper, firstly the definitions of FPIT and planelet are introduced. Secondly, after analyzing the components and relationship of planelet at monoscale, a fast performance of planelet transform is designed. Thirdly, the steps of the proposed crack surface extraction method are described. In numeric experiment, compared with the method of 3D facet model, C-V model and 3D wavelet respectively, the proposed method can extract the crack surface full and continuously, which,is robust to noise.
Keywords: Crack surface extraction, planelet, finite plane integral transform (FPIT), volume data, industrial computed tomography (ICT)
DOI: 10.3233/XST-2010-0275
Journal: Journal of X-Ray Science and Technology, vol. 19, no. 1, pp. 1-12, 2011
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