Three-dimensional sub-bottom profiler sonar horizon picking with structural feature constraints

doi:10.11947/j.AGCS.2025.20240143

Abstract

Abstract:

Three-dimensional sub-bottom profiler (3D SBP) makes up for the deficiency of two-dimensional sub-bottom profile in the spatial coverage of horizontal imaging, and makes it possible to obtain 3D information of sub-bottom with high quality. However, at present, the interference of scattered echoes in sub-bottom is serious, the spatial changes of horizons are complex, and the traditional methods can only achieve two-dimensional horizon picking and it is difficult to express the three-dimensional spatial distribution of sub-bottom. Therefore, a three-dimensional reflector structure enhancement (RSE3D) algorithm based on plate-like and non-vertical structural features is proposed to improve the effect of horizon picking. Firstly, a volume data generation method considering the spatial distribution of sampling points is presented to realize the 3D sub-bottom profile data generation. Then, the RSE3D algorithm is proposed by approximating the formation structure as a plate structure and taking into account the non-vertical structural features. The method can effectively suppress the echo interference such as scattering and highlight the effective information. On the basis of the enhanced processing results, the horizon picking is finally realized by using the threshold method. Experimental verification and analysis show the index values of horizon picking are better than 80%, which represents the superiority of the proposed algorithm in horizon picking.

Key words: three-dimensional sub-bottom profiler, horizon picking, structural features, enhancement filtering

CLC Number:

P229

Shaobo LI, Jianhu ZHAO, Aixue WANG, Dong DING, Yunlong WU. Three-dimensional sub-bottom profiler sonar horizon picking with structural feature constraints[J]. Acta Geodaetica et Cartographica Sinica, 2025, 54(2): 262-271.

Figures/Tables 12

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算法名称	F₁值	召回率	精确率	准确率
基于二维Frangi增强滤波	79	84	73	97
基于均匀尺度的三维增强滤波	83	90	78	98