A trend surface filtering method and system for multi-beam bathymetry data

A data trend, multi-beam technology, applied in complex mathematical operations and other directions, can solve problems such as insufficient effectiveness, and achieve the effect of enhancing effectiveness, reducing false alarm rate, and improving data quality.

Active Publication Date: 2020-11-17
深圳市建设综合勘察设计院有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multi-beam bathymetric data trend surface filtering method and system to solve the gross error calibration problem caused by the insufficient effectiveness of the existing trend surface filtering method in view of the deficiencies in the prior art

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  • A trend surface filtering method and system for multi-beam bathymetry data
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  • A trend surface filtering method and system for multi-beam bathymetry data

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[0046] The present invention provides a multi-beam bathymetric data trend surface filtering method and system. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] In the present invention, suffixes such as 'module', 'part' or 'unit' used to represent elements are used only to facilitate description of the present invention and have no specific meaning by themselves. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0048] The content of the invention will be further described below by describing the embodiments in conjunction with the accompanying drawings.

[0049] Please refer to figure 1 , figure 1 It is a flow chart of a...

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Abstract

The invention discloses a multi-beam sounding data trend surface filtering method and system. The method comprises the steps that mesh generation is conducted on a multi-beam measurement area; sounding points in meshes are fitted into a second-order trend surface through a least square median method, and a fitting equation of the second-order trend surface is obtained; standardized residual absolute values of all the sounding points are calculated according to the fitting square, and the distribution probability of the standardized residual absolute values is calculated; a gross calibration value is selected according to the distribution probability, and sounding values containing gross errors are removed by adopting a gross error calibration principle; and fitting is repeatedly executed to the removing step until the variation of a fitting coefficient is smaller than preset tolerance and all the gross error sounding values are removed. According to the method, by improving the gross error calibration principle, reasonable sounding values with high observation noise are accepted, the false alarm rate of the trend surface filtering method is decreased, and the quality of data obtained after filtering processing is improved.

Description

technical field [0001] The invention relates to the technical field of multi-beam data processing, in particular to a multi-beam bathymetric data trend surface filtering method and system. Background technique [0002] In the multi-beam bathymetry system, due to factors such as noise, water bubbles on the surface of the transducer, and sound ray bending, there are inevitably gross errors in the multi-beam bathymetry data, which makes it difficult to accurately reflect the characteristics of the seabed topography, and even leads to The entire batch of data is invalid. Therefore, gross error elimination is an essential part of multi-beam data processing and seabed topographic characteristics research. The trend surface filtering method is a commonly used multi-beam bathymetry data gross error detection and elimination method. After it was first proposed by French scholar Nathalie Debase in 1998, it has been widely adopted by marine institutions and scholars at home and abroa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/11G06F17/16
CPCG06F17/11G06F17/16
Inventor 王双龙宋军杨啸宇朱家松邹亚靖汪驰升
Owner 深圳市建设综合勘察设计院有限公司
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