ISSN 1004-4140
CN 11-3017/P
Volume 26 Issue 1
Feb.  2017
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YUAN Ye, HUANG Xiao-han, WANG Zhong-gang, ZHANG Yu, JIANG Zheng. The Method of Inversion Imaging Based on Matrix Pretreatment and BPT-SIRT Nonlinear Weighted[J]. CT Theory and Applications, 2017, 26(1): 53-62. DOI: 10.15953/j.1004-4140.2017.26.01.07
Citation: YUAN Ye, HUANG Xiao-han, WANG Zhong-gang, ZHANG Yu, JIANG Zheng. The Method of Inversion Imaging Based on Matrix Pretreatment and BPT-SIRT Nonlinear Weighted[J]. CT Theory and Applications, 2017, 26(1): 53-62. DOI: 10.15953/j.1004-4140.2017.26.01.07
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The Method of Inversion Imaging Based on Matrix Pretreatment and BPT-SIRT Nonlinear Weighted

  • 1. Dept. of Civil Engineering, LEU, Chongqing 401311, China;

  • 2. Construction Dept. of Project 078#, Equipment Development Department, Wenchang 610041, China

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  • Received Date: August 01, 2016
  • Available Online: November 27, 2022
    Graphical Abstract
    • Abstract
  • In order to improve the quality of the inversion in the elastic wave CT, at the same time, taking into account the pathological characteristics of the coefficient matrix and low quality of the reconstruction image obtained by the BPT-SIRT algorithm, a method based on principal component weighting preprocessing and weighted BPT-SIRT algorithm is proposed. The initial iterative value obtained by the method of BPT is weighted, then, adding a weight to the principal component of the coefficient matrix, the element of ray matrix is weighted by the nonlinear exponential weighting function. The method is verified by numerical simulation and concrete filled steel tube specimens with defects. The results show that the method has better convergence speed and accuracy, and the recognition effect is better.
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