High-resolution structured light D sensor for autonomous underwater inspection

Risholm, Petter; Kirkhus, Trine; Thielemann, Jens T.

doi:10.1109/oceans.2018.8604930

Cited by 10 publications

(14 citation statements)

References 13 publications

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“…The best known commercial product is Texas Instruments’ digital light processor (DLP) [110]. There are underwater 3D scanners that use DMDs to project patterns which are more complex than a line [111,112,113].…”

Section: Active Light Projection Technologiesmentioning

confidence: 99%

“…Risholm et al [76,134] and Chua et al [75] used a doe to flash diffuse light in every direction with no spatial structure. Other authors employ spatially-structured light: Massot-Campos and Oliver-Codina [60] used a special doe to project 25 lines onto the surface of the scanned object, whereas Sarafraz and Haus [135] and Risholm et al [112,136] used commercial projectors to illuminate the scene with specifically-designed, more complex patterns. Bleier and Nüchter [137] simply used two laser lines forming a cross.…”

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

“…Risholm et al [112] projected a gray code phase stepping (GCPS) pattern using a LED with a DLP projector. In a newer version [136], they developed a multi-frequency phase stepping (MFPS) pattern, which was reportedly more accurate in-depth and more robust to turbidity than GCPS.…”

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

“…The baseline of triangulation sensors is a very important design decision, as discussed in Section 3.2. The reported baselines are 100 mm (Lopes et al [140]), 100 to 200 mm (Risholm et al [112,136]), 265 mm (Matos et al [143]) and 150 to 400 mm (Palomer et al [48]). Bodenmann et al [61] use a larger baseline between 800 and 1500 mm.…”

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

“…Apart from the sensor’s performance, water turbidity is one of the main challenges of underwater scanning (see Section 2), and it has various effects. On the one hand, Risholm et al [112] report a worsening in-depth precision for higher turbidity levels. On the other hand, Massot-Campos and Oliver-Codina [60] states that the effect of higher turbidity on their sensor is a major decrease in the number of detected points due to a reduction of the maximum scanning range.…”

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

See 4 more Smart Citations

State of the Art of Underwater Active Optical 3D Scanners

Castillón

Palomer

Forest

et al. 2019

Sensors

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Underwater inspection, maintenance and repair (IMR) operations are being increasingly robotized in order to reduce safety issues and costs. These robotic systems rely on vision sensors to perform fundamental tasks, such as navigation and object recognition and manipulation. Especially, active optical 3D scanners are commonly used due to the domain-specific challenges of underwater imaging. This paper presents an exhaustive survey on the state of the art of optical 3D underwater scanners. A literature review on light projection and light-sensing technologies is presented. Moreover, quantitative performance comparisons of underwater 3D scanners present in the literature and commercial products are carried out.

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Section: Active Light Projection Technologiesmentioning

confidence: 99%

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

Section: Quantitative Analysis Of Current Technologiesmentioning

confidence: 99%

See 3 more Smart Citations

State of the Art of Underwater Active Optical 3D Scanners

Castillón

Palomer

Forest

et al. 2019

Sensors

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A novel mooring system anomaly detection framework for SEMI based on improved residual network with attention mechanism and feature fusion

Mao,

Li,

Duan

et al. 2024

Reliability Engineering & System Safety

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Low-cost optical techniques for detecting and imaging different objects underwater

Hyiamang

Guo

et al. 2021

J. Phys.: Conf. Ser.

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The camera has been commonly used in underwater image acquisition experiments, but the image noise is high, and the distance is limited because of the underwater scattering effect. In this paper, the optical detection device of underwater objects, 520 nm continuous laser modulation by PWM pulse modulation (10 Hz, 60% space ratio), was used to scan and detect two completely different objects (such as advanced resin and green leaves). The photodetectors were used to replace cameras, collect and process the received laser echo signals, and image and display the data. The detected objects images can be visually displayed in the form of grayscale images (resolution of 143 x 62), and the corresponding effects have been discussed. In the experiment, we used a 70 cm long ultra-white glass cylinder and detected a distance of 45 cm, and the results were very consistent with the actual situation.

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High-resolution structured light D sensor for autonomous underwater inspection

Cited by 10 publications

References 13 publications

State of the Art of Underwater Active Optical 3D Scanners

State of the Art of Underwater Active Optical 3D Scanners

A novel mooring system anomaly detection framework for SEMI based on improved residual network with attention mechanism and feature fusion

Low-cost optical techniques for detecting and imaging different objects underwater

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