Assessment of the electromagnetic inversion with the multiscaling Inexact-Newton method

The integration of the Inexact-Newton method within a multi-scaling strategy is assessed in the framework of the contrast field formulation of the electromagnetic inverse scattering. Thanks to the features of the integrated approach, the technique is expected to suitably face the non-linearity and the ill-posedness/ill-conditioning issues of the imaging problem. A numerical validation dealing with different objects, measurement setups, and noise conditions is carried out to provide evidence of the method premises pointing out features and potentialities as well as current limitations. The validation is completed with comparisons with state-of-the-art bare approaches.