Three-dimensional reconstruction method and three-dimensional reconstruction system for sonar image

By using two sonars with vertically cross-installed vertically in an underwater environment for data acquisition and using probability sensor models and important sampling techniques for processing, the accuracy and computing resource consumption problems of sonar images in the existing technology are solved, and efficient and accurate three-dimensional reconstruction effect is achieved.

CN119722932APending Publication Date: 2025-03-28SUZHOU IND PARK IND TECH SCHOOL (SUZHOU IND PARK COMMUNITY TRAINING COLLEGE JIANGSU UNITED VOCATIONAL & TECH COLLEGE SUZHOU IND PARK BRANCH) +1
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Patent Information

Application Number
CN202411737673.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing three-dimensional reconstruction method of sonar images has problems such as blurred imaging, noise interference and high computing resource consumption in underwater environments, making it difficult to effectively realize high-precision three-dimensional reconstruction.

Method used

Two sonars are installed in a vertical crossover mode, one is used to obtain horizontal direction data for short distances, and the other is used to obtain vertical data for long distances, and data processing and three-dimensional image reconstruction are carried out through probability sensor models and important sampling techniques.

Benefits of technology

It improves the accuracy of three-dimensional image reconstruction, reduces the consumption of computing resources, improves processing speed, and effectively reduces noise interference.

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Abstract

The invention provides a three-dimensional reconstruction method and a three-dimensional reconstruction system for sonar images, and the method comprises the following steps: controlling a first sonar and a second sonar to carry out the data measurement, and enabling the first sonar and the second sonar to be installed on an AUV in a vertical crossing manner; filtering background information according to measurement data of the first sonar, and extracting a target area; establishing a probability sensor model of the dual-sonar system according to the measurement data of the second sonar; generating weight particles according to the probability sensor model of the dual-sonar system and the target area, and carrying out important sampling to retain particles with high weight; and performing three-dimensional image reconstruction according to the weight particle information. According to the invention, the two kinds of sonar are installed in a vertical crossing manner, the data of the two kinds of sonar are complementary, the reconstruction precision of the three-dimensional image can be effectively improved, important sampling is carried out on particles with high weights in the image reconstruction process, the computing resources can be greatly saved, and the processing speed is improved while the precision of the three-dimensional reconstructed image is ensured.
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