GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain
Usually, in ground-penetrating radar (GPR) datasets, the user defines the limits between the useful signal and the noise through standard filtering to isolate the effective signal as much as possible. However, there are true reflections that mask the coherent reflectors that can be considered noise....
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/10/2005 |
| _version_ | 1797533365853749248 |
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| author | Rui Jorge Oliveira Bento Caldeira Teresa Teixidó José Fernando Borges |
| author_facet | Rui Jorge Oliveira Bento Caldeira Teresa Teixidó José Fernando Borges |
| author_sort | Rui Jorge Oliveira |
| collection | DOAJ |
| description | Usually, in ground-penetrating radar (GPR) datasets, the user defines the limits between the useful signal and the noise through standard filtering to isolate the effective signal as much as possible. However, there are true reflections that mask the coherent reflectors that can be considered noise. In archaeological sites these clutter reflections are caused by scattering with origin in subsurface elements (e.g., isolated masonry, ceramic objects, and archaeological collapses). Its elimination is difficult because the wavelet parameters similar to coherent reflections and there is a risk of creating artefacts. In this study, a procedure to filter the clutter reflection noise (CRN) from GPR datasets is presented. The CRN filter is a singular value decomposition-based method (SVD), applied in the 2D spectral domain. This CRN filtering was tested in a dataset obtained from a controlled laboratory environment, to establish a mathematical control of this algorithm. Additionally, it has been applied in a 3D-GPR dataset acquired in the Roman villa of Horta da Torre (Fronteira, Portugal), which is an uncontrolled environment. The results show an increase in the quality of archaeological GPR planimetry that was verified via archaeological excavation. |
| first_indexed | 2024-03-10T11:14:29Z |
| format | Article |
| id | doaj.art-b173c71d8e014d08a0132a68e2af04e5 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T11:14:29Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-b173c71d8e014d08a0132a68e2af04e52023-11-21T20:34:14ZengMDPI AGRemote Sensing2072-42922021-05-011310200510.3390/rs13102005GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral DomainRui Jorge Oliveira0Bento Caldeira1Teresa Teixidó2José Fernando Borges3Instituto de Ciências da Terra, ICT, Universidade de Évora, Apartado 94, 7002-554 Évora, PortugalInstituto de Ciências da Terra, ICT, Universidade de Évora, Apartado 94, 7002-554 Évora, PortugalInstituto Andaluz de Geofísica, Campus Universitario de Cartuja, Universidad de Granada, 18071 Granada, SpainInstituto de Ciências da Terra, ICT, Universidade de Évora, Apartado 94, 7002-554 Évora, PortugalUsually, in ground-penetrating radar (GPR) datasets, the user defines the limits between the useful signal and the noise through standard filtering to isolate the effective signal as much as possible. However, there are true reflections that mask the coherent reflectors that can be considered noise. In archaeological sites these clutter reflections are caused by scattering with origin in subsurface elements (e.g., isolated masonry, ceramic objects, and archaeological collapses). Its elimination is difficult because the wavelet parameters similar to coherent reflections and there is a risk of creating artefacts. In this study, a procedure to filter the clutter reflection noise (CRN) from GPR datasets is presented. The CRN filter is a singular value decomposition-based method (SVD), applied in the 2D spectral domain. This CRN filtering was tested in a dataset obtained from a controlled laboratory environment, to establish a mathematical control of this algorithm. Additionally, it has been applied in a 3D-GPR dataset acquired in the Roman villa of Horta da Torre (Fronteira, Portugal), which is an uncontrolled environment. The results show an increase in the quality of archaeological GPR planimetry that was verified via archaeological excavation.https://www.mdpi.com/2072-4292/13/10/2005applied geophysicsdigital signal processingenhancement of 3D-GPR datasetsclutter noise removalspectral filtering |
| spellingShingle | Rui Jorge Oliveira Bento Caldeira Teresa Teixidó José Fernando Borges GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain Remote Sensing applied geophysics digital signal processing enhancement of 3D-GPR datasets clutter noise removal spectral filtering |
| title | GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain |
| title_full | GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain |
| title_fullStr | GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain |
| title_full_unstemmed | GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain |
| title_short | GPR Clutter Reflection Noise-Filtering through Singular Value Decomposition in the Bidimensional Spectral Domain |
| title_sort | gpr clutter reflection noise filtering through singular value decomposition in the bidimensional spectral domain |
| topic | applied geophysics digital signal processing enhancement of 3D-GPR datasets clutter noise removal spectral filtering |
| url | https://www.mdpi.com/2072-4292/13/10/2005 |
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