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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2022-04-10
Deep Learning Based Non-Iterative Solution to the Inverse Problem in Microwave Imaging
By
Ria Benny,

    Ms. Ria Benny

    Cochin University of Science and Technology

    India

    Homepage

Thathamkulam A. Anjit,

    Dr. Thathamkulam A. Anjit

    Cochin University of Science and Technology

    India

    Homepage

Palayyan Mythili

    Dr. Palayyan Mythili

    Cochin University of Science and Technology

    India

    Homepage

Progress In Electromagnetics Research M, Vol. 109, 231-240, 2022
DOI:10.2528/PIERM22010905 | Google Scholar

Abstract
A deep learning-based approach in conjugation with Fourier Diffraction Theorem (FDT) is proposed in this paper to solve the inverse scattering problem arising in microwave imaging. The proposed methodology is adept in generating a permittivity mapping of the object in less than a second and hence has the potential for real-time imaging. The reconstruction of the dielectric permittivity from the measured scattered field values is done in a single step as against that by a long iterative procedure employed by conventional numerical methods. The proposed technique proceeds in two stages; with the initial estimate of the contrast function being generated by the FDT in the first stage. This initial profile is fed to a trained U-net to reconstruct the final dielectric permittivities of the scatterer in the second stage. The capability of the proposed method is compared with other works in the recent literature using the Root Mean Square Error (RMSE). The proposed method generates an RMSE of 0.0672 in comparison to similar deep learning methods like Back Propagation-Direct Sampling Method (BP-DSM) and Subspace-Based Variational Born Iterative Method (SVBIM), which produce error values 0.1070 and 0.0813 in the case of simulation (using Austria Profile). The RMSE level while reconstructing the experimental data (FoamDielExt experimental database) is 0.0922 for the proposed method as against 0.1631 and 0.1037 for BP-DSM and SVBIM, respectively.
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Citation
Ria Benny, Thathamkulam A. Anjit, and Palayyan Mythili, "Deep Learning Based Non-Iterative Solution to the Inverse Problem in Microwave Imaging," Progress In Electromagnetics Research M, Vol. 109, 231-240, 2022.
DOI:10.2528/PIERM22010905
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