Accelerated Levenberg-Marquardt method with an optimal step length in electrical capacitance tomography

Author

Smolik, Waldemar T.

Author_Institution

Inst. of Radiolelectronics, Warsaw Univ. of Technol., Warsaw, Poland

fYear

2010

fDate

1-2 July 2010

Firstpage

204

Lastpage

209

Abstract

Electrical capacitance tomography (ECT) is a fast, low cost imaging technique but offers very low spatial resolution. A modified Levenberg-Marquardt (LM) algorithm for image reconstruction in ECT is presented. To accelerate the convergence rate an additional acceleration term is added to the conventional LM. The method for the optimal step length dynamic calculation is applied. The results of application of these modifications of the LM algorithm for 2D image reconstruction of numerical and real phantoms are presented. The 16 electrodes ETC tomograph was used for real data registration.

Keywords

electric impedance imaging; image reconstruction; image registration; imaging; tomography; accelerated Levenberg Marquardt method; data registration; electrical capacitance tomography; image reconstruction; imaging technique; optimal step length; spatial resolution; Acceleration; Cost function; Electrical capacitance tomography; Electrodes; Image reconstruction; Iterative algorithms; Jacobian matrices; Linear approximation; Permittivity; Spatial resolution; component; convergence rate; electrical capacitance tomography; iterative Levenberg-Marquardt method; optimal step length;

fLanguage

English

Publisher

ieee

Conference_Titel

Imaging Systems and Techniques (IST), 2010 IEEE International Conference on

Conference_Location

Thessaloniki

Print_ISBN

978-1-4244-6492-0

Type

conf

DOI

10.1109/IST.2010.5548490

Filename

5548490