International Society for Industrial Process Tomography

Influence of the Integral Parameters in Calderon Method on Image Quality for Electrical Capacitance Tomography

Shijie Sun¹, Lijun Xu¹*, Zhang Cao¹ and Jiangtao Sun¹

¹ School of Instrumentation and Opto-Electronic Engineering, Beihang University, Beijing, China.

^*Email: lijunxu@buaa.edu.cn

ABSTRACT

The Calderon method can be used for direct image reconstruction in electrical capacitance tomography. The integral parameters in the Calderon method, e.g., the integral radius and the number of integral nodes, greatly influence the performance of the Calderon method. In the Calderon method, increasing the integral radius will increase the high-frequency information of the reconstructed image, but the image noise is also increased. In addition, increasing the number of integral nodes will increase the computing accuracy but decrease the computing speed. Therefore, it is necessary to analyse these parameters to improve the image quality for ECT when using the Calderon method. In this paper, the influence of the integral parameters in the Calderon method on the image quality for different permittivity distributions is analysed by numerical simulation, which can guide the use of the Calderon method.

Keywords Electrical capacitance tomography, image reconstruction, inverse problem, integral radius, integral nodes

Industrial Application General