Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/56058
Title: Determination of maximum tilt angle from analytic signal amplitude of magnetic data by the curvature-based method
Authors: Pham, Thanh Luan
Le, Huy Minh
Oksum, Erdine
Do, Duc Thanh
Keywords: The curvature-based
Tilt angle
Analytic signalamplitude
Edge detection
Tu Chinh – Vung May
Issue Date: 2018
Series/Report no.: Vietnam Journal of Earth Sciences;Vol. 40, No. 04 .- P.354–366
Abstract: Imaging buried geological boundaries is one of a major objective during the interpretation of magnetic field data in Geophysics. Therefore, edge detection and edge enhancement techniques assist a crucial role on this aim. Most of the existing edge detector methods require to obtain special points such as in general the maxima of the resulting im­age. One of the useful tools in estimating edges from magnetic data is the tilt angle of the analytical signal amplitude due to its value slightly dependence on the direction of magnetization. In this study, the maxima of the tilt angle of analytical signal amplitudes of the magnetic data was determined by a curvature-based method. The technique is based on fitting a quadratic surface over a 3x3 windows of the grid for locating any appropriate critical point that is near the centre of the window. The algorithm is built in Matlab environment. The feasibility of the algorithm is demonstrated in two cases of synthetic data as well as on real magnetic data from Tu Chinh-Yung May area. The source code is available from the authors on request.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/56058
ISSN: 0866-7187
Appears in Collections:Vietnam journal of Earth sciences

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