Secondary echo suppression and geomorphologic map fusion method based on sounding side-scan sonar

Abstract

The invention relates to a secondary echo suppression and geomorphologic map fusion method based on sounding side-scan sonar, comprising two steps: (1) secondary echo suppression: a piece of sounding side-scan sonar passes through a plurality of receiving array elements to eliminate secondary sea echo using a beam-forming technology and a Chebyshev weighting method; and (2) geomorphologic map fusion: a side-scan geomorphologic map acquired by a single receiving array element and a side-scan geomorphologic map acquired by multiple receiving array elements are fused, wherein there are mainly single-array element side-scan maps near the position right below, and there are mainly multi-array element weighted side-scan maps at other positions. The problem of ghosting in conventional side-scan sonar geomorphologic maps is well eliminated. A single-array element side-scan map and a multi-array element side-scan map are fused effectively to get a higher-quality side-scan geomorphologic map, which facilitates interpretation of the submarine geomorphology.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic imaging, and in particular relates to a secondary echo suppression and topographic map fusion method based on sounding side-scan sonar. Background technique [0002] With the development and utilization of marine resources, the detection of seabed topography and geomorphology is becoming more and more important. At present, the detection of seabed topography and geomorphology mainly relies on side-scan sonar and multi-beam bathymetry sonar. It is used to detect seabed topography; multi-beam bathymetric sonar can accurately measure seabed depth and form an intuitive three-dimensional topographic map, which is mainly used to detect seabed topography. In order to combine the advantages and functions of these two sonars, the British scholar Denbigh formally proposed the principle and structure of the sounding side-scan sonar system for the first time in 1977. All the advantages of side-sc...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a secondary echo suppression and geomorphic map fusion method based on sounding side-scan sonar, using multi-array element joint processing technology to solve the problem that conventional side-scan sonar cannot Suppress the problem of seabed secondary scattering echo and sea surface echo, and then fuse with the side scan image of the single array element to obtain a higher quality side scan image

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