A Method for Extracting Layered Structure and Spatial Distribution of Sediment Layers in Local Sea Areas

Abstract

The present invention provides a method for extracting the layered structure and spatial distribution of local sea area sedimentary layers, comprising: step 1, data I=Δr×Δd as a shallow profile image to be processed; step 2, using a two-dimensional multi-scale line filter Perform multi-scale line filtering on the line information in the superficial section image to be processed to obtain the maximum response image M; step 3, decompose the maximum response image M in different directions, and perform threshold filtering on the low-frequency sub-image obtained from the decomposition, and decompose to obtain Threshold enhancement is performed on the horizontal detail sub-image, and the original image is reconstructed by inverse two-dimensional wavelet transform to obtain an image of horizontal line contrast; step 4, the interface structure and background of the deposition layer of the image of the regional information of the horizontal line in step 3 Carry out binarization processing to obtain the area boundary of the horizontal line; step 5, the horizontal sampling distance becomes r 0 +Δr, repeat step 1 to step 4; step 6, draw the spatial layered structure map of the sediment layer in the local sea area.

Description

technical field [0001] The invention relates to the technical fields of oceanographic measurement and seabed remote sensing, in particular to a method for extracting the layered structure and spatial distribution of sedimentary layers in local sea areas. Background technique [0002] Obtaining accurate marine environmental information is the foundation of marine resource development and national defense construction, and the spatial layered structure and spatial distribution of seabed sediments in local sea areas are important conditions for the study of seabed geological changes and the application of sonar equipment. The traditional method of extracting the layered structure and spatial distribution of seabed sediments is to use columnar sampling equipment, use mechanical pressure or gravity to sample at fixed points, and analyze the sediment in the laboratory to obtain the parameter information of the sedimentary layer, and then obtain the stratification of the sedimentary...

AI Technical Summary

Problems solved by technology

This method can effectively remove the interference of ship noise and wake on the sea surface, and avoid the influence of multiple reflection echoes on the sea bottom. In the data of sea bottom reverberation interference, the accurate spatial layered interface structure of the sediment layer in the local sea area can be obtained synchronously and continuously. Furthermore, the number of layers of the sedimentary layer and the position and thickness of each layer can be automatically obtained, which solves the problem of manual processing and low accuracy of shallow profile data in the multi-system joint seabed survey

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