LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data
In the evaluation of magnetic field data, edge enhancement and detection techniques are important treatments for the interpretation of geological structures. In general geological sense, contiguity of deep and shallow magnetic sources leads to weak and intense anomalies that complicates the interpre...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Earth Science Institute, Slovak Academy of Sciences, Slovakia
2019-12-01
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| Series: | Contributions to Geophysics and Geodesy |
| Subjects: | |
| Online Access: | https://journal.geo.sav.sk/cgg/article/view/214 |
| _version_ | 1818410690461827072 |
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| author | Luan Thanh PHAM Erdinc OKSUM Thanh Duc DO Minh LE-HUY Minh Duc VU Vinh Duc NGUYEN |
| author_facet | Luan Thanh PHAM Erdinc OKSUM Thanh Duc DO Minh LE-HUY Minh Duc VU Vinh Duc NGUYEN |
| author_sort | Luan Thanh PHAM |
| collection | DOAJ |
| description | In the evaluation of magnetic field data, edge enhancement and detection
techniques are important treatments for the interpretation of geological structures. In
general geological sense, contiguity of deep and shallow magnetic sources leads to weak
and intense anomalies that complicates the interpretation to disclose adjacent anomalous
sources. Many of the existing filters for edge detection in magnetics mostly have the disadvantage
that they require a reduction to pole transformation as the pre-process of the
data or they cannot balance weak and intense anomalies and therefore fail in detecting
edges of deep and shallow sources simultaneously. This study presents an improved edge
detection filter LAS (logistic function of the analytical signal), based on the generalised
logistic function configured by the ratio of derivatives of the analytical signal. This novel
approach has the capability of reducing the dependence on the direction of the magnetization
and also balancing anomalies of sources at different levels of depth. The feasibility of
the method is examined on both theoretical and real data cases comparatively with some
other methods that utilize the analytical signal in their basis. In comparison, the results
demonstrate that the LAS method provides more accurate estimation of edge localization. |
| first_indexed | 2024-12-14T10:19:32Z |
| format | Article |
| id | doaj.art-cd760e21dbde427799e3e3d2855b07c2 |
| institution | Directory Open Access Journal |
| issn | 1338-0540 |
| language | English |
| last_indexed | 2024-12-14T10:19:32Z |
| publishDate | 2019-12-01 |
| publisher | Earth Science Institute, Slovak Academy of Sciences, Slovakia |
| record_format | Article |
| series | Contributions to Geophysics and Geodesy |
| spelling | doaj.art-cd760e21dbde427799e3e3d2855b07c22022-12-21T23:06:39ZengEarth Science Institute, Slovak Academy of Sciences, SlovakiaContributions to Geophysics and Geodesy1338-05402019-12-0149442544010.2478/congeo-2019-0022214LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic dataLuan Thanh PHAM0Erdinc OKSUM1Thanh Duc DO2Minh LE-HUY3Minh Duc VU4Vinh Duc NGUYEN5Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi, VietnamS¨uleyman Demirel University, Engineering Faculty, Department of Geophysical Engineering, Isparta, TurkeyFaculty of Physics, VNU University of Science, Vietnam National University, Hanoi, VietnamInstitute of Geophysics, Vietnam Academy of Science and TechnologyFaculty of Physics, VNU University of Science, Vietnam National University, Hanoi, VietnamFaculty of Physics, VNU University of Science, Vietnam National University, Hanoi, VietnamIn the evaluation of magnetic field data, edge enhancement and detection techniques are important treatments for the interpretation of geological structures. In general geological sense, contiguity of deep and shallow magnetic sources leads to weak and intense anomalies that complicates the interpretation to disclose adjacent anomalous sources. Many of the existing filters for edge detection in magnetics mostly have the disadvantage that they require a reduction to pole transformation as the pre-process of the data or they cannot balance weak and intense anomalies and therefore fail in detecting edges of deep and shallow sources simultaneously. This study presents an improved edge detection filter LAS (logistic function of the analytical signal), based on the generalised logistic function configured by the ratio of derivatives of the analytical signal. This novel approach has the capability of reducing the dependence on the direction of the magnetization and also balancing anomalies of sources at different levels of depth. The feasibility of the method is examined on both theoretical and real data cases comparatively with some other methods that utilize the analytical signal in their basis. In comparison, the results demonstrate that the LAS method provides more accurate estimation of edge localization.https://journal.geo.sav.sk/cgg/article/view/214generalised logistic function, analytic signal amplitude, edge detection |
| spellingShingle | Luan Thanh PHAM Erdinc OKSUM Thanh Duc DO Minh LE-HUY Minh Duc VU Vinh Duc NGUYEN LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data Contributions to Geophysics and Geodesy generalised logistic function, analytic signal amplitude, edge detection |
| title | LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| title_full | LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| title_fullStr | LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| title_full_unstemmed | LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| title_short | LAS: A combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| title_sort | las a combination of the analytic signal amplitude and the generalised logistic function as a novel edge enhancement of magnetic data |
| topic | generalised logistic function, analytic signal amplitude, edge detection |
| url | https://journal.geo.sav.sk/cgg/article/view/214 |
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