Edge detection of potential field data using improved local phase filter
Edge detection of potential field data using improved local phase filter
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DOI：
10.1071/eg12022
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发表时间：
2013-03
影响因子：
0.9
通讯作者：
Guoqing Ma
中科院分区：
文献类型：
--
作者：
Guoqing Ma
边缘检测是位场数据解释中的一项必不可少的任务。基于水平导数和垂直导数的高通滤波器有很多种，如总水平导数、倾斜角、theta图等。本文提出了一种新的边缘检测滤波器--改进的局部相位（ILP）滤波器。新的滤波器是计算稳定的，因为它不需要计算的位场数据的垂直导数。新的滤波器进行了测试合成和真实的位场数据。ILP滤波器的分辨能力通过与由其他滤波器获得的结果进行比较来测试。ILP滤波器在位场数据边缘检测中的优势在于它能更精确、更清晰地显示源的边缘，并能显示出更细微的细节。
Edge detection is a requisite task in the interpretation of potential field data. There are many high-pass filters based on horizontal and vertical derivatives in use, such as total horizontal derivative, tilt angle, theta map, et al. In this paper, we present a new edge detection filter, which uses the combination of the different order horizontal derivatives to delineate the edges of the sources, called improved local phase (ILP) filter. The new filter is computationally stable, as it does not need the computation of the vertical derivatives of potential field data. The new filter is tested on synthetic and real potential field data. The resolving power of the ILP filter is tested by comparing the results with those obtained by the other filters. The advantage of the ILP filter in the edge detection of potential field data is due to the fact that it can display the edges of the causative sources more precisely and clearly, and can bring out more subtle details.