An image-reconstruction algorithm based on Landweber's iteration method for electrical-capacitance tomography

被引:452
作者
Yang, WQ
Spink, DM
York, TA
McCann, H
机构
[1] Univ Manchester, Dept Elect Engn & Elect, Manchester M60 1QD, Lancs, England
[2] Univ Leeds, Dept Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England
关键词
image reconstruction; iteration method; process tomography;
D O I
10.1088/0957-0233/10/11/315
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Electrical capacitance tomography (ECT) is a so-called 'soft-field' tomography technique. The linear back-projection (LBP) method is used widely for image reconstruction in ECT systems. It is numerically simple and computationally fast because it involves only a single matrix-vector multiplication. However, the images produced by the LBP algorithm are generally qualitative rather than quantitative. This paper presents an image-reconstruction algorithm based on a modified Landweber iteration method that can greatly enhance the quality of the image when two distinct phases are present. In this algorithm a simple constraint is used as a regularization for computing a stabilized solution, with a better immunity to noise and faster convergence. Experimental results are presented.
引用
收藏
页码:1065 / 1069
页数:5
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