Title :
Reconstruction of complex objects in electrical capacitance tomography
Author :
Smolik, Waldemar
Author_Institution :
Warsaw Univ. of Technol., Warsaw
Abstract :
Electrical capacitance tomography (ECT) is fast, non-invasive and low cost imaging technique but offers very low spatial resolution. This paper presents the results of application of a nonlinear optimization technique for 2D reconstruction of images of complex objects. The iterative image reconstruction algorithm is based on the modified Levenberg-Marquard formula with additional convergence parameter. The original forward problem solver is used to speed up sensitivity matrix calculation. The reconstruction for numerical and real objects is presented. The 16 electrodes ETC was used for the real data acquisition.
Keywords :
capacitance measurement; convergence; data acquisition; image reconstruction; image resolution; iterative methods; matrix algebra; optimisation; tomography; capacitance measurement; complex object reconstruction; convergence parameter; data acquisition; electrical capacitance tomography; forward problem solver; iterative 2D image reconstruction; modified Levenberg-Marquard formula; nonlinear optimization technique; sensitivity matrix calculation; spatial resolution; Capacitance measurement; Convergence; Electrical capacitance tomography; Electrodes; Image reconstruction; Inverse problems; Iterative algorithms; Jacobian matrices; Permittivity measurement; Visualization; electrical tomography; image reconstruction; inverse problem; nonlinear methods;
Conference_Titel :
Imaging Systems and Techniques, 2009. IST '09. IEEE International Workshop on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-3482-4
Electronic_ISBN :
978-1-4244-3483-1
DOI :
10.1109/IST.2009.5071681
