Image reconstruction using direct Landweber method in electrical resistance tomography

B. S. Kima, A. K. Khambampatia, K. Y. Kimb, S. Kima,c

aInstitute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Korea bDepartment of Electronic Engineering, Jeju National University, Jeju 690-756, Korea cDepartment of Nuclear and Energy Engineering, Jeju National University, Jeju 690-756, Korea

Abstract

In this paper, a direct Landweber method is proposed to estimate the rapidly varying resistivity distribution. The proposed method is that the iterative Landweber method is modified for on-line computation and the resistivity distribution is estimated directly with multiplying between data and a matrix that is computed off-line. Moreover, to improve the reconstruction performance, adaptive step-lengths for the proposed method are computed. Numerical experiments have been carried out to evaluate the performance of the proposed method.

Keywords: electrical resistance tomography; Landweber method; image reconstruction; on-line monitoring