Underwater 3D Reconstruction for Underwater Construction Robot Based on 2D Multibeam Imaging Sonar

Song, Young-Eun; Choi, Seungjin

doi:10.5574/ksoe.2016.30.3.227

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…This study found that the accuracy of length measurements of targets made by imaging SONAR (while perpendicular) is inversely proportional to the beamwidth, and that beam spacing can be used to predict the precision. This is in line with how images are constructed with imaging SONAR (Song & Choi, 2016). To illustrate this, Figure 9 shows the beam geometry schematic (from Figure 1) with two targets of the same length.…”

Section: Discussionsupporting

confidence: 77%

“…Bathymetric multibeam SONAR systems (or multibeam echosounders) are designed to measure water depth, as such the receiver array has a very narrow azimuth angle (typically 0.5–2°) and is deployed pointing towards the seafloor (Lurton, 2010). Imaging SONAR systems are designed to visualise the underwater environment, are usually deployed pointing horizontally through the water and have a receiver azimuth angle (typically 10–30°) larger than bathymetric systems (Song & Choi, 2016). 2D imaging SONAR systems create a plan view image of the area they are directed at, where objects can be detected through acoustic and topographic contrast with the surrounding environment (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…Imaging SONAR systems are designed to visualise the underwater environment, are usually deployed pointing horizontally through the water and have a receiver azimuth angle (typically 10-30°) larger than bathymetric systems (Song & Choi, 2016). 2D imaging SONAR systems create a plan view image of the area they are directed at, where objects can be detected through acoustic and topographic contrast with the surrounding environment (Figure 1).…”

mentioning

confidence: 99%

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The accuracy of length measurements made using imaging SONAR is inversely proportional to the beamwidth

Parnum,

Saunders,

Stott

et al. 2024

Methods Ecol Evol

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Multibeam imaging SONARs have been used for a range of measurement applications, such as measurements of fish lengths. This study aimed to quantify the accuracy of imaging SONAR systems, that varied in frequency and beam geometry, to measure the length of synthetic targets positioned perpendicularly. Blueprint Oculus imaging SONAR systems, with four different (centre) frequencies (750 kHz, 1.2 MHz, 2.1 MHz and 3 MHz), were used to measure the length of three targets of nominal lengths: 10 cm, 20 cm and at ranges between 1 and 15.5 m. The effect of beam geometry on measurement error was then examined using regression analysis. This study found that there was an overestimation of the actual length of the target for all measurements that was inversely proportional to the horizontal beamwidth. The measurement error can be reduced by normalising for beamwidth. However, the variation of measurements (i.e. the precision) was found to also increase with range, which was attributed to the increasing beam separation. It is important that the effect of beamwidth on the accuracy of target length measurements, by imaging SONARs is acknowledged in future studies. One approach to mitigating this problem, is to limit the range at which length measurements are made to a beamwidth that produces an estimated level of error that is acceptable for that study.

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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The accuracy of length measurements made using imaging SONAR is inversely proportional to the beamwidth

Parnum,

Saunders,

Stott

et al. 2024

Methods Ecol Evol

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“…Object shadows in acoustic images can also be made use of in restoring 3D data. Song et al [167] used 2D multibeam imaging sonar for the 3D reconstruction of underwater structures. The acoustic pressure wave generated by the imaging sonar transmitter propagated and reflected on the surface of the underwater system, and these reflected echoes were collected by the 2D imaging sonar.…”

Section: Sonarmentioning

confidence: 99%

“…Song [167,168] IS An approach for 3D reconstruction of underwater structures using 2D multibeam IS was proposed. The physical relationship between the sonar image and the scene terrain was employed to locate elevation information in order to address the issue of the absence of elevation information in sonar images.…”

Section: Brahim [166] Ismentioning

confidence: 99%

Overview of Underwater 3D Reconstruction Technology Based on Optical Images

Wang

Shen

et al. 2023

JMSE

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At present, 3D reconstruction technology is being gradually applied to underwater scenes and has become a hot research direction that is vital to human ocean exploration and development. Due to the rapid development of computer vision in recent years, optical image 3D reconstruction has become the mainstream method. Therefore, this paper focuses on optical image 3D reconstruction methods in the underwater environment. However, due to the wide application of sonar in underwater 3D reconstruction, this paper also introduces and summarizes the underwater 3D reconstruction based on acoustic image and optical–acoustic image fusion methods. First, this paper uses the Citespace software to visually analyze the existing literature of underwater images and intuitively analyze the hotspots and key research directions in this field. Second, the particularity of underwater environments compared with conventional systems is introduced. Two scientific problems are emphasized by engineering problems encountered in optical image reconstruction: underwater image degradation and the calibration of underwater cameras. Then, in the main part of this paper, we focus on the underwater 3D reconstruction methods based on optical images, acoustic images and optical–acoustic image fusion, reviewing the literature and classifying the existing solutions. Finally, potential advancements in this field in the future are considered.

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SOINS: A Real-Time Underwater Sonar-Inertial System for Pipeline 3D Reconstruction

Gong

Zeng

et al. 2022

Lecture Notes in Computer Science

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Underwater 3D Reconstruction for Underwater Construction Robot Based on 2D Multibeam Imaging Sonar

Cited by 7 publications

References 8 publications

The accuracy of length measurements made using imaging SONAR is inversely proportional to the beamwidth

The accuracy of length measurements made using imaging SONAR is inversely proportional to the beamwidth

Overview of Underwater 3D Reconstruction Technology Based on Optical Images

SOINS: A Real-Time Underwater Sonar-Inertial System for Pipeline 3D Reconstruction

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