A 3D underwater acoustic image system real-time reconstruction method

Abstract

The invention discloses a 3D underwater acoustic imaging system real-time reconstruction method, comprising: (1) inputting acquired 3D underwater acoustic imaging data into a 2x2 grid block real-pointsearch module, searching and connecting acoustic data points in 2*2 grid block for non-empty acoustic data points on each scanning beam chain list; (2) inputting the data processed in the step (1) into a 3* 3 grid block empty point searching module, and searching and connecting the acoustic data points in the 3 * 3 interval centered on the empty point in the grid block; (3) sequentially inputtingthe data processed in the step (2) into a 2*3 vertical grid block searching module and a 3*2 horizontal grid block searching module for searching and connecting acoustic data points; (4) inputting the data processed in the step (3) into the triangular patch generation module, and generating the triangular patch by using the established connection relationship. The invention can effectively fill the hole of 3D underwater acoustic imaging data under the interference of background noise environment, and realizes the real-time reconstruction of 3D underwater acoustic imaging data.

Description

technical field [0001] The invention belongs to the field of underwater acoustic imaging, and in particular relates to a real-time reconstruction method for a 3D underwater acoustic imaging system. Background technique [0002] With the wide application of underwater acoustic detection in the development of marine resources, underwater acoustic technology has become an effective means of underwater information detection, positioning and communication, and underwater acoustic imaging technology for underwater detection has become an important tool for large-scale underwater detection. means. For example, the Chinese patent document whose publication number is CN102928844A discloses an underwater sub-wavelength resolution three-dimensional imaging method, which includes the following steps: (1) acoustic signal emission; (2) acoustic lens beamforming; (3) acoustic signal reception and conditioning (4) Image processing and display: the two-dimensional data obtained according to...

AI Technical Summary

Problems solved by technology

[0003] The real-time reconstruction of 3D underwater acoustic imaging system plays an important role in the follow-up processing of 3D underwater acoustic imaging technology. 3D grid data search and surface reconstruction will generate a large number of invalid triangular patches, which will increase the amount of calculation and reduce efficiency, and will form many holes in the sonar image data, making it difficult to correctly reflect the topography of the seabed

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