A direct imaging method for the exterior and interior inverse scattering problems
Numerical Analysis
2022-02-21 v2 Numerical Analysis
Analysis of PDEs
Abstract
This paper is concerned with the inverse acoustic scattering problems by an obstacle or a cavity with a sound-soft or a sound-hard boundary. A direct imaging method relying on the boundary conditions is proposed for reconstructing the shape of the obstacle or cavity. First, the scattered fields are approximated by the Fourier-Bessel functions with the measurements on a closed curve. Then, the indicator functions are established by the superpositions of the total fields or their derivatives to the incident point sources. We prove that the indicator functions vanish only on the boundary of the obstacle or cavity. Numerical examples are also included to demonstrate the effectiveness of the method.
Cite
@article{arxiv.2112.13311,
title = {A direct imaging method for the exterior and interior inverse scattering problems},
author = {Deyue Zhang and Yue Wu and Yinglin Wang and Yukun Guo},
journal= {arXiv preprint arXiv:2112.13311},
year = {2022}
}
Comments
28 pages, 7 figures