Supercharge Your Innovation With Domain-Expert AI Agents!

A submarine line detection method based on side-scan sonar data fusion and precision processing

A technology of data fusion and side-scan sonar, which is applied in the direction of sound wave reradiation, radio wave measurement system, measurement device, etc., can solve the problems such as the complex implementation process of LOG operator submarine line extraction, and achieve the effect of solving the complex implementation process

Active Publication Date: 2021-07-02
SECOND INST OF OCEANOGRAPHY MNR
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a seabed line detection method based on side-scan sonar data fusion and precision processing, and introduces the method of fusion of LOG&Canny operator and threshold method to detect the seabed line of side-scan sonar images, In this way, the limitations of the LOG operator and the complicated implementation process of seabed line extraction are solved quickly and accurately.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A submarine line detection method based on side-scan sonar data fusion and precision processing
  • A submarine line detection method based on side-scan sonar data fusion and precision processing
  • A submarine line detection method based on side-scan sonar data fusion and precision processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1 Comparative Analysis of Edge Detection Algorithms

[0083] By comparing five edge detection algorithms such as Laplace, Roberts, Kirsch, Canny, and LOG to analyze their advantages and disadvantages, it is verified that when the noise in the water column area is weak, the simple edge detection algorithm can monitor the seabed line better. Wherein the method effect of LOG&Canny combination of the present invention is better.

[0084] Table 1 time comparison of each method

[0085]

[0086] Table 1 records the time required for each method to run. This method can calculate the result in about 0.5s, which ensures the accuracy while also ensuring the efficiency. Although the latter methods have improved in time, they cannot guarantee Accuracy of bottom line detection.

[0087] image 3 , it can be seen that the detection effects of Kirsch algorithm, Roberts algorithm, Laplace algorithm, LOG algorithm, and Canny algorithm increase sequentially. The Kirsch ...

Embodiment 2

[0092] Embodiment 2 Implementation process of a submarine line detection method based on side-scan sonar data fusion and precision processing

[0093] step1: Convert the sound wave intensity to gray scale. Decode the XTF data to generate a grayscale file;

[0094] step2: Load the image. Build a Bitmap type variable and load a complete single-strip submarine sonar image f(x,y);

[0095] step3: Image filtering. Calculate LOG(x, y) using formula (2) to filter and denoise the original sonar image f(x, y), and obtain the image f'(x, y) after removing the Gaussian noise of the image;

[0096] step4: image sharpening. The edge strength of the image will be reduced during the filtering process in step 3, so Laplacian is used to sharpen the image to obtain f″(x,y);

[0097] step5: Gradient amplitude and direction angle calculation. Use the Sobel first-order differential template to calculate the gradients in the horizontal and vertical directions, and use formulas (3) and (4) to ca...

Embodiment 3

[0102] Example 3 Specific application and comparison in Shenzhen Dapeng Bay sea area

[0103] The experiment adopts the survey data of Shenzhen Dapeng Bay sea area, and uses dual-frequency side-scan sonar equipment to simultaneously collect high-frequency (high-resolution, span 2*75m) and low-frequency (normal resolution, span 2*200m) two 100% overlap of adjacent track line measurement results, which are carried out synchronously with single-beam sounding, and 171 survey lines have been completed. The SSS instrument is Edgetech 4200FS, the frequency is 385KHz, and the single-beam sounder model is HY1600. The range of survey area is as Figure 7 As shown, the water depth variation in the survey area is 5-15m. There are not many types of geomorphology in the survey area, but there are many in number, mainly including: sand spots, fishing nets, sand pits, anchor trenches (anchor marks), reefs, etc.

[0104] Select the area with high noise in the water column area of ​​the sonar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a seabed line detection method based on side-scan sonar data fusion and precise processing. Affected by multiple factors, it is difficult to detect seabed lines in sonar images. In order to solve the problem that complex seabed lines are difficult to accurately detect, the present invention is used to accurately detect seabed lines to perform later slant distance correction. In this method, the image filtered by the LOG function is used as the input image of the Canny detection algorithm to track the seabed, and the result is fused with the tracking result of the threshold method. data for comparison. The present invention is verified by taking Shenzhen Dapeng Bay sea area as an example, and the tracking accuracy with a root mean square error of ±0.2m is obtained, which verifies the feasibility of the present invention. This invention patent can be used for precision detection of submarine lines under complex conditions.

Description

technical field [0001] The invention relates to a seabed line detection method based on side-scan sonar data fusion and precise processing. Background technique [0002] Side-scan sonar is an efficient means of obtaining seabed landform information, and has been widely used for its advantages of high precision, high efficiency and high seabed image quality. At present, side-scan sonar is mainly used in marine surveying and mapping, seabed geological detection, and seabed feature detection. In the generated side-scan sonar seabed grayscale image, the first real seabed echo point connection line of each ping data along the track direction, that is, the obvious boundary between the water column area and the image area is called the seabed line . It indicates the height of the towfish from the seabed, and its detection accuracy directly affects the accuracy of slant distance correction. When side-scan sonar data is collected, the towfish is generally towed, and when it is aff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/88
CPCG01S15/89
Inventor 王胜平吴自银李家彪杨建松赵荻能罗孝文
Owner SECOND INST OF OCEANOGRAPHY MNR
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com