Imaging Interiors: An Implicit Solution to Electromagnetic Inverse Scattering Problems
This work improves computational imaging for non-invasive interior imaging, but it appears incremental as it builds on prior methods with specific enhancements.
The paper tackles electromagnetic inverse scattering problems by using an implicit representation for relative permittivity to address discretization and inversion challenges, outperforming existing methods on standard benchmarks.
Electromagnetic Inverse Scattering Problems (EISP) have gained wide applications in computational imaging. By solving EISP, the internal relative permittivity of the scatterer can be non-invasively determined based on the scattered electromagnetic fields. Despite previous efforts to address EISP, achieving better solutions to this problem has remained elusive, due to the challenges posed by inversion and discretization. This paper tackles those challenges in EISP via an implicit approach. By representing the scatterer's relative permittivity as a continuous implicit representation, our method is able to address the low-resolution problems arising from discretization. Further, optimizing this implicit representation within a forward framework allows us to conveniently circumvent the challenges posed by inverse estimation. Our approach outperforms existing methods on standard benchmark datasets. Project page: https://luo-ziyuan.github.io/Imaging-Interiors