A comparative assessment of information-exploitation techniques for GPR data inversion

5th International Workshop on New Computational Methods for Inverse Problems

物理学;计算机科学

Salucci, M.^1 ; Tenuti, L.^2 ; Poli, L.^2 ; Oliveri, G.^2 ; Massa, A.^1,2

ELEDIA Offshore Lab at Paris, Laboratoire des Signaux et Systémes (L2S, UMR CNRS 8506), 3 rue Joliot Curie, Gif-sur-Yvette

91192, France^1

ELEDIA Research Center, Department of Information Engineering and Computer Science, University of Trento, Via Sommarive 5, Trento

38123, Italy^2

关键词: Comparative assessment;    Conjugate gradient minimizations;    Ground penetrating radar (GPR);    Information exploitation;    Intrinsic frequency;    Inversion techniques;    Numerical comparison;    Regions of interest;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/657/1/012010/pdf
DOI  :  10.1088/1742-6596/657/1/012010

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The inversion of Ground Penetrating Radar (GPR) data requires the development of suitable information-exploitation techniques that are able to extract as much as possible information on the unknown targets from the available measurements. An innovative singlefrequency (SF) inversion technique based on a deterministic conjugate-gradient (CG) minimization and the iterative multi-scaling approach (IMSA) is described. It is then shown how to improve the performances of the SF-IMSA-CG method by the introduction of an external frequency hopping (FH) iterative loop. On the one hand, the proposed FH-IMSA-CG method allows to exploit the intrinsic frequency diversity of wideband GPR measurements thanks to the FH strategy. On the other hand, the IMSA approach guarantees a significant reduction of the problem unknowns, providing an increased resolution within the identified regions of interest (RoIs). A numerical comparison shows the advantages of the FH-IMSA-CG over its single-frequency version. Moreover, the benefits of integrating the IMSA within the FH are verified by directly comparing the FH-IMSA-CG with its single-resolution (BARE) version (FH-BARE-CG).