Locating the horizontal boundaries of magnetic and gravity sources provides a fundamental tool for interpreting geological structures. Many filters for detecting the source boundaries have been proposed. These filters are generally constructed based on vertical and horizontal gradients of the magnetic and gravity data. This paper presents a comparative study of various boundary detection filters such as gradient amplitude, tilt derivative, gradient amplitude of tilt angle, theta map, horizontal tilt angle, hyperbolic tilt angle, and tilt angle of gradient amplitude. The applicability of each filter was tested on three synthetic gravity data sets. The results show that the use of the tilt angle of gradient amplitude can display the edges more clearly and precisely. Furthermore, the filters are also performed on a real gravity data set from the Song Hong Trough (Vietnam) where the result computed by the tilt angle of gradient amplitude is also in accord with the geology information.

中文翻译：

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用于增强潜在场源边界的不同滤波器的比较研究：综合示例和来自Song Hong Trough（越南）的案例研究

定位磁源和重力源的水平边界为解释地质结构提供了基本工具。已经提出了许多用于检测源边界的滤波器。这些滤波器通常是根据磁性和重力数据的垂直和水平梯度构造的。本文对各种边界检测滤波器进行了比较研究，例如梯度幅度，倾斜导数，倾斜角的倾斜幅度，θ图，水平倾斜角，双曲线倾斜角和倾斜幅度的倾斜角。在三个合成重力数据集上测试了每个过滤器的适用性。结果表明，利用梯度幅度的倾斜角可以更加清晰，准确地显示边缘。此外，