GAN-driven Electromagnetic Imaging of 2-D Dielectric Scatterers
<|reference_start|>GAN-driven Electromagnetic Imaging of 2-D Dielectric Scatterers: Inverse scattering problems are inherently challenging, given the fact they are ill-posed and nonlinear. This paper presents a powerful deep learning-based approach that relies on generative adversarial networks to accurately and efficiently reconstruct randomly-shaped two-dimensional dielectric objects from amplitudes of multi-frequency scattered electric fields. An adversarial autoencoder (AAE) is trained to learn to generate the scatterer's geometry from a lower-dimensional latent representation constrained to adhere to the Gaussian distribution. A cohesive inverse neural network (INN) framework is set up comprising a sequence of appropriately designed dense layers, the already-trained generator as well as a separately trained forward neural network. The images reconstructed at the output of the inverse network are validated through comparison with outputs from the forward neural network, addressing the non-uniqueness challenge inherent to electromagnetic (EM) imaging problems. The trained INN demonstrates an enhanced robustness, evidenced by a mean binary cross-entropy (BCE) loss of $0.13$ and a structure similarity index (SSI) of $0.90$. The study not only demonstrates a significant reduction in computational load, but also marks a substantial improvement over traditional objective-function-based methods. It contributes both to the fields of machine learning and EM imaging by offering a real-time quantitative imaging approach. The results obtained with the simulated data, for both training and testing, yield promising results and may open new avenues for radio-frequency inverse imaging.<|reference_end|>
@article{naseer2024gan-driven,
    title={GAN-driven Electromagnetic Imaging of 2-D Dielectric Scatterers},
    author={Ehtasham Naseer, Ali Imran Sandhu, Muhammad Adnan Siddique, Waqas W.
  Ahmed, Mohamed Farhat, and Ying Wu},
    journal={arXiv preprint arXiv:2402.10831},
    year={2024},
    archivePrefix={arXiv},
    eprint={2402.10831},
    primaryClass={eess.IV cs.CE cs.LG eess.SP}
}