PONTI , Cristina

This paper deals with direct/inverse electromagnetic scattering for imaging applications. In particular, a new approach for the forward scattering computation is proposed, which is based on a timedomain implementation of the CWA. The reconstruction process is performed by using a "qualitative" imaging method able to detect and localize buried...

No description

No description

A hybrid method for through-the-wall imaging, based on an iterative technique performing a regularization in the framework of variable-exponent Lebesgue spaces, is presented in this paper. The exponent function is computed using a preliminary image obtained through the singular value decomposition method. The effectiveness of the approach has...

Through-wall imaging is an application field in which microwaves play an important role, thanks to their ability of penetrating inside building materials. In this framework, the aim of this paper is twofold. On the one hand, it presents an analytical forward model able to effectively describe the scattering phenomena by fully taking into...

The imaging of dielectric targets hidden behind a wall is addressed in this paper. An analytical solver for a fast and accurate computation of the forward scattered field by the targets is proposed, which takes into account all the interactions of the electromagnetic field with the interfaces of the wall. Furthermore, an inversion procedure...

A novel two-step inverse-scattering technique is proposed for through-the-wall microwave imaging. The approach is based on a regularization scheme developed in the framework of variable-exponent Lebesgue spaces, which enhances the quality of the reconstruction by properly tuning the exponent function that defines the adopted norm. Such a...

A hybrid inversion scheme for through-the-wall imaging is proposed in this paper. The approach is based on a linearized model of the inverse-scattering problem, employing the Green's function developed for a layered background. The reconstruction is obtained by means of a Landweberlike iterative method performing a regularization in the...

In this Chapter, an overview of the results achieved by teams from the CNIT research units of the University of Genoa and University of Roma Tre in the framework of through-the-wall imaging is reported. The through-the-wall imaging problem is dealt with through a comprehensive approach, which considers both the solution of the...

In this work, an inverse-scattering technique for through-the-wall imaging is presented and validated against experimental data. The inverse-scattering scheme is developed in variable-exponent Lebesgue spaces, where a delay-and-sum beamforming approach is preliminary applied to build the exponent function. Measurements are collected as...

In this work, a prototype of microwave imaging system for through-the-wall monitoring is presented. The system can operate remotely, as well as by using antennas directly in contact with the wall. For the remote modality, ad-hoc wide-band antennas have been designed and integrated into an efficient measurement system, able to acquire the...