摘要： 针对电容层析成像(ECT)技术中存在的软场效应及病态问题,提出一种基于修正隐式Landweber的电容层析成像算法。在分析电容层析成像系统基本原理的基础上,给出隐式Landweber方法解决ECT图像重建问题的求解公式,并对该公式进行迭代修正。同时对修正后的隐式Landweber电容层析成像算法的收敛性进行分析。仿真实验结果表明,修正隐式Landweber方法在解决ECT图像重建问题上,其精度与速度均优于经典Landerber、LBP等方法,且实现简单、稳定性好。

关键词: 电容层析成像, Landweber算法, 图像重建, 迭代算法, 支持向量机

Abstract: A modified implicit type Landweber image reconstruction algorithm is presented for solving the ‘soft-field’ nature and the ill-posed problem in Electrical Capacitance Tomography(ECT)technology.On analysis of the basic principles of the ECT system,the paper proposes a formula of the modified implicit type Landweber algorithm to solve the problem of electrical capacitance tomography,and finishes the iterative modification,and analyzes the convergence of the algorithm.Simulation experimental results show that compared with Landweber,LBP methods,both precision and speed of the modified implicit formula Landweber method are very good,and it is simple and stabilized.

Key words: Electrical Capacitance Tomography(ECT), Landweber algorithm, image reconstruction, iterative algorithm, Support Vector Machine(SVM)

中图分类号: 

• TP391.41