Contrast Source Inversion-Based Multilayered Object Analysis for Terahertz Wave Imaging

Morimoto, Hayatomomaru; Yamauchi, Yoshihiro; Kidera, Shouhei

doi:10.1109/lgrs.2021.3099199

Cited by 8 publications

(1 citation statement)

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“…Additionally, the initial estimate of the permittivity and conductivity of an object is introduced by minimizing the cost function in the CSI. Notably, a similar approach was proposed in the literature [39] to avoid a local optimal solution. Furthermore, the relative permittivity can be determined accurately by the maximum response of the radar image focusing on the rebar response, which does not require prior knowledge about the depth of the rebar position or its cover thickness.…”

Section: Introductionmentioning

confidence: 99%

Complex Permittivity Retrieval Approach With Radar Enhanced Contrast Source Inversion for Microwave Nondestructive Road Evaluation

Suzuki,

Nakamura,

Kidera

2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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An experimental investigation of microwave quantitative imaging of nondestructive testing applications for concrete road structures is presented. A radar prior-based contrast source inversion (CSI) scheme is introduced to achieve an accurate reconstruction for target shape and dielectric property by applying the promising radar approach-range points migration (RPM). Moreover, to address the local optimum problem, we introduce an appropriate initial estimate for complex permittivity that focuses on the cost function of the CSI. A numerical and real data from an actual concrete road model, where a thin-layer water-filled cavity is buried into the boundary area between the asphalt and the concrete floorboard, show that our proposed approach improves reconstruction accuracy for permittivity and conductivity in a real nondestructive testing model.

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Section: Introductionmentioning

confidence: 99%