系统仿真学报 ›› 2019, Vol. 31 ›› Issue (5): 819-827.doi: 10.16182/j.issn1004731x.joss.17-0287

• 仿真建模理论与方法 •    下一篇

基于修正稀疏拟牛顿的电容层析成像重建算法

陈宇, 夏宗基, 周雨佳   

  1. 东北林业大学信息与计算机工程学院,哈尔滨 150040
  • 收稿日期:2017-06-15 修回日期:2017-09-11 出版日期:2019-05-08 发布日期:2019-11-20
  • 作者简介:陈宇(1975-),男,黑龙江伊春,博士后,副教授,研究方向为探测与成像,图像处理。
  • 基金资助:
    国家自然科学基金(31670717),中央高校基本科研业务费(572017EB09)

Modified Sparse Quasi - Newton Algorithm for Electrical Capacitance Tomography System

Chen Yu, Xia Zongji, Zhou Yujia   

  1. College of Information and Computer Engineering of Northeast Forestry University, Harbin 150040, China
  • Received:2017-06-15 Revised:2017-09-11 Online:2019-05-08 Published:2019-11-20

摘要: 针对电容层析成像(ECT)技术中的“软场”效应和病态问题,提出一种基于修正稀疏拟牛顿的电容层析成像重建算法。推导出基于修正稀疏拟牛顿的数学模型。给出运用该算法的电容层析成像图像重建这一反问题求解的最终迭代公式。将ECT反问题求解的迭代公式用于数字仿真模拟实验。将仿真实验结果与经典的LBP算法、Landweber算法、CG算法、SD算法等成像结果比较分析,证明基于修正稀疏拟牛顿重建算法在解决ECT图像重建问题上,其图像成像质量与收敛速度,都有很好的保证

关键词: 电容层析成像, 修正稀疏拟牛顿, 图像重建, 迭代算法, 收敛性

Abstract: To solve the 'soft-field' nature and the ill-posed problem in electrical capacitance tomography technology, a modified sparse quasi - newton algorithm for electrical capacitance tomography is presented. The mathematical model of modified sparse quasi - newton is derived. The final iteration formula of modified sparse quasi - newton used to adjust the inverse problem solving of the capacitance tomography image reconstruction is given. An iterative formula for ECT inverse problem solving is used for digital simulation experiment. The simulation experiment results are compared with the results of LBP, Landweber, CG, SD, and so on. The results of the analysis show that both precision and speed of the algorithm are very good.

Key words: electrical capacitance tomography, modified sparse quasi - newton, image reconstruction, iterative algorithm, convergence

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