Overview on Image Reconstruction Algorithms for Electrical Capacitance Tomography

Abstract

Electrical Capacitance Tomography is an imaging technology for visualizing industrial process based on the mechanism of capacitance sensitive process. After decades of development, the research results of ECT technology are also constantly improved and further. However the soft-field effect and under-determined problem limited the ECT imaging technology applied in related field. There has been extensive effort to study the image reconstruction theory and algorithms, in order to significantly improve the image resolution and speed to extend the application of ECT technique. This paper mainly gives an overview for the current research status of image reconstruction algorithm and compares the shortcoming and advantages of the iterative reconstruction algorithms, the non-iterative reconstruction algorithms and intelligent algorithms. In the end, Several 3D image reconstruction algorithms are introduced and the future research direction of image reconstruction algorithm are discussed.