Enhancing potential field data using filters based on the local phase

  title={Enhancing potential field data using filters based on the local phase},
  author={Gordon Robert John Cooper and Duncan R. Cowan},
  journal={Comput. Geosci.},
Measures of the local phase of potential fields can be a useful aid to their interpretation. [...] Key Method The filters are demonstrated on synthetic gravity data and on magnetic data from Australia. Source code in Matlab format is available from the server at: www.iamg.org.Expand
A generalized derivative operator for potential field data
The enhancement of potential field data using filters based on horizontal and vertical derivatives is common. As well as the direct use of the gradients themselves they are used in filters such asExpand
Balancing images of potential-field data
This study suggests balancing the analytic signal amplitude by the use of its orthogonal Hilbert transforms, and shows that the balanced profile curvature can be an effective method of enhancing potential-field data. Expand
Improved edge detection tools in the interpretation of potential field data
In this paper, some strategies to improve previous edge detection methods are given, and two different forms of improved theta map filters are presented, which have the advantage of their ability to delineate the source edges more clearly. Expand
Enhancement of Potential Field Source Boundaries Using an Improved Logistic Filter
A method based on the logistic function and the horizontal gradient amplitude, which shows improved performance as a boundary detection filter and can avoid producing spurious boundaries in the output maps. Expand
Sharpening the response of some amplitude-balancing potential field filters
  • G. Cooper
  • Computer Science
  • Arabian Journal of Geosciences
  • 2020
An alternative approach is to raise the filter to a power, which produces improved results without the noise problems, and is demonstrated on magnetic data from Southern Africa. Expand
Filtering potential field data by modifying its amplitude and phase in the space domain
Potential field datasets are commonly broken down in the space domain into amplitude (total gradient, or analytic signal amplitude) and phase (tilt angle) components as part of the data processingExpand
Edge detection of potential field data using improved local phase filter
  • G. Ma
  • Computer Science
  • 2013
A new edge detection filter is presented, which uses the combination of the different order horizontal derivatives to delineate the edges of the sources, called improved local phase (ILP) filter, which is computationally stable, as it does not need the computation of the vertical derivatives of potential field data. Expand
On the performance of phase-based filters for enhancing lateral boundaries of magnetic and gravity sources: a case study of the Seattle uplift
Determining lateral boundaries of the potential field source is a common feature in interpreting magnetic and gravity data. There are many different phase based filters to determine the boundaries ofExpand
A fast automatic interpretation of 3D potential-field image
  • Jian Tang, Jia-Jun Li, Xu Zhang, Y. Bu
  • Geology, Computer Science
  • 2016 12th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD)
  • 2016
The proposed filter is applied to a field example from the Finger Lakes region of State of New York, where the results are in good agreement with previous results and present new structural features. Expand
The Local Phase in the Scale-Space Monogenic Signal: An Edge-Detection Filter
We have presented a new edge-detection filter to enhance potential-field data by using the local phase in the Poisson scale-space monogenic signal. The local phase in the monogenic signal is aExpand


Potential field tilt—a new concept for location of potential field sources
In this paper we expand on a new concept for potential field processing and interpretation, the potential field tilt, which we introduced in an earlier paper. The tilt angle is defined in terms ofExpand
Feature Detection Using Sunshading
Horizontal derivatives of potential field data are routinely used to sharpen the edges of linear features such as dykes and faults. They are also used as input to the sunshading filter. Given theExpand
Separation filtering using fractional order derivatives
Separation or layer filtering of regional and residual magnetic fields is an important component of magnetic interpretation. Separation filtering depends fundamentally on the concept of randomExpand
Automatic conversion of magnetic data to depth, dip, and susceptibility contrast using the SPI (TM) method
The Source Parameter Imaging (SPI™) method computes source parameters from gridded magnetic data. The method assumes either a 2-D sloping contact or a 2-D dipping thin‐sheet model and is based on theExpand
The meter readerNew insights into magnetic derivatives for structural mapping
Magnetic and gravity derivatives can be likened to seismic attributes in that they can help define/estimate the physical properties of the source structure causing the anomaly. This contributionExpand
Feature detection using sun shading
Abstract Sun shading is a powerful tool for the enhancement of linear features in images. Given the azimuth and elevation of a source of illumination it calculates the reflectance from a surfaceExpand
On “Theta map: Edge detection in magnetic data” (
Wijns et al. (2005) may have presented an effective edge detector, but do not acknowledge several very relevant works (Hansen et al., 1987; Phillips, 2000; Keating et al., 2004). To some extent, theExpand
A case study on geophysical gridding techniques: INTREPID perspective
A wide variety of numerical procedures in potential field geophysics require data modelled on a regular grid. However, airborne data tend to be highly sampled along the flight line and sparselyExpand
Enhancement of magnetic signatures of impact structures
Aeromagnetic surveys play an important role in the detection and analysis of terrestrial impact structures as large semi-regional aeromagnetic surveys are widely available. Impact craters can beExpand
Hill shading and the reflectance map
A brief review of the history of manual methods is followed by a discussion of a number of methods that have been proposed for the automatic generation of shaded overlays, compared using the reflectance map as a common representation for the dependence of tone or gray level on the orientation of surface elements. Expand