Passive sonar multi-target azimuth extraction method, electronic equipment and computer-readable storage medium

Abstract

The invention relates to the technical field of sonar image processing, in particular to a passive sonar multi-target azimuth extraction method, electronic equipment and a computer-readable storage medium. The method includes the following steps: expanding the original azimuth history image to obtain the extended azimuth history image; setting the window, sequentially obtaining a series of window images on the extended azimuth history image, performing Radon transformation on each window image to obtain a coefficient matrix R; dividing each matrix R into block; extract the peak points of each block in each matrix R; normalize the obtained peak points of each matrix R to obtain matrix N; reverse the Radon transformation of matrix N to obtain the initial target azimuth trace in matrix R, which is marked as matrix T ; Perform binarization on the matrix T to obtain the matrix M; calculate the threshold of the detection times of the azimuth trace points according to the window size and the number of window translation pixels, and purify the matrix M according to the detection times threshold of the azimuth trace points to obtain the final target azimuth trace; intercept the original The corresponding part of the azimuth history map is obtained to obtain the extracted multi-target azimuth traces.

Description

technical field [0001] The invention relates to the technical field of sonar image processing, in particular to a passive sonar multi-target azimuth extraction method, electronic equipment and a computer-readable storage medium. Background technique [0002] Bearing Time Recording (BTR) is an important information presentation method of passive sonar, which reflects the spatio-temporal information of the target signal and background noise. With the development of vibration and noise reduction technology, the radiation noise of ships is getting lower and lower, and the target azimuth track in the passive sonar azimuth history map is becoming less and less obvious, which affects target detection and azimuth estimation. There are three main types of methods for extracting target azimuths from multi-beam output results: azimuth extraction methods based on peak detection, azimuth extraction methods based on Hidden Markov Model (HMM), and azimuth extraction methods based on spatia...

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Problems solved by technology

[0010] The purpose of the present invention is to propose a passive sonar multi-target azimuth extraction method, electronic equipment and computer-readable storage medium, through the passive sonar multi-target azimuth extraction method to solve the complex and changeable underwater environment existing in the prior art. There may be omissions or outliers when the peak point is detected. When the background noise is large, the existing azimuth extraction method based on peak detection will fail, and although HMM has a good modeling ability for the correlation between the front and rear states, but This kind of azimuth extraction algorithm has the technical problem that the amount of calculation will increase rapidly with the increase of the number of target azimuths

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