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Edge detection of potential field sources using the softsign function
Geocarto International ( IF 3.8 ) Pub Date : 2021-02-10 , DOI: 10.1080/10106049.2021.1882007
Luan Thanh Pham 1 , Erdinc Oksum 2 , Dung Van Le 3 , Francisco J. F. Ferreira 4 , Sang Thi Le 1
Affiliation  

Abstract

Edge enhancement techniques have been widely used in mapping geologic features, such as faults, contacts and dikes. The universal disadvantages of previously presented filters are that they cannot balance signals caused by geological structures located at different depths or they bring false edges or the images obtained from these filters have low resolution. We introduce a filter SF that uses the softsign function and derivatives of the horizontal gradient to solve these problems. The applicability of the filter is exemplified with three synthetic data sets and aeromagnetic data from the Olympic Peninsula, northwestern United States. Compared to other edge detector methods, the filter is able to outline the source edges more precisely and clearly, and there are no spurious lateral boundaries in the output results.



中文翻译:

使用软信号功能对潜在场源进行边缘检测

摘要

边缘增强技术已广泛用于映射地质特征,例如断层,接触和堤坝。先前提出的滤波器的普遍缺点是它们不能平衡由位于不同深度的地质结构引起的信号,或者它们带来假边缘,或者从这些滤波器获得的图像具有低分辨率。我们介绍了使用软符号函数和水平梯度导数的滤波器SF来解决这些问题。过滤器的适用性以来自美国西北部奥林匹克半岛的三个合成数据集和航空磁数据为例。与其他边缘检测器方法相比,该滤波器能够更精确,更清晰地勾勒出源边缘的轮廓,并且输出结果中没有虚假的横向边界。

更新日期:2021-02-10
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