Combining Radon transform and Electrical Capacitance Tomography for a $2d+1$ imaging device

TL;DR

This paper introduces a novel 2D+1 imaging device combining Radon transform and Electrical Capacitance Tomography, demonstrating promising surface and near-surface imaging capabilities with potential for optimized inversion methods.

Contribution

It presents a new coplanar capacitive imaging device modeled as a weighted Radon transform, enabling effective surface and near-surface imaging with theoretical and experimental validation.

Findings

Good surface resolution achieved

Effective short depth imaging demonstrated

Potential for optimized inversion formulas

Abstract

This paper describes a coplanar non invasive non destructive capacitive imaging device. We first introduce a mathematical model for its output, and discuss some of its theoretical capabilities. We show that the data obtained from this device can be interpreted as a weighted Radon transform of the electrical permittivity of the measured object near its surface. Image reconstructions from experimental data provide good surface resolution as well as short depth imaging, making the apparatus a $2d+1$ imager. The quality of the images leads us to expect that excellent results can be delivered by \emph{ad-hoc} optimized inversion formulas. There are also interesting, yet unexplored, theoretical questions on imaging that this sensor will allow to test.