A practical underwater 3D-Laserscanner

This paper presents a survey on optical sensors and methods for 3D reconstruction in underwater environments. The techniques to obtain range data have been listed and explained, together with the different sensor hardware that makes them possible. The literature has been reviewed, and a classification has been proposed for the existing solutions. New developments, commercial solutions and previous reviews in this topic have also been gathered and considered.

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“…Hildebrandt et al [ 83 ] mount a laser line onto a servomotor that can be rotated

with an accuracy of

. The camera is a 640 × 480 CMOS shooting at 200 frames per second (fps) with a

HFOV (horizontal field of view).…”

Section: Sensors and Technologiesmentioning

confidence: 99%

Optical Sensors and Methods for Underwater 3D Reconstruction

Massot-Campos

Oliver-Codina

2015

Sensors

138

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“…As reported by Bass et al (2009 andHildebrandt et al (2008) the wavelength of the line laser should be in the green spectral band. Hence, it is a good compromise between high light energy and absorption effects of the water caused by suspended loads and dissolved solids.…”

Section: Stereo Laser-profile Systemmentioning

confidence: 71%

Precise Laser-Based Optical 3d Measurement of Welding Seams Under Water

Ekkel

Schmik

Lühmann

et al. 2015

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:This paper deals with the development of a measuring procedure and an experimental set-up (stereo camera system in combination with a projecting line laser and a positioning unit) which are intended to detect the surface topography, particularly of welds, with high accuracy in underwater environments. The system concept makes provision for the fact that the device can be positioned in space and manipulated by hand. The development, optimization and testing of the system components for surface measurements as well as calibration and accuracy evaluations are the main objectives within this research project. Testing procedures and probes are constructed and evaluated to verify the results. First results will be shown, where the test objects are underwater. The development considers conditions for a future adaption to underwater use.

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“…As reported by (Bass et al, 2009, Hildebrandt et al, 2008) the wavelength of the line laser should be in the green spectral band. Hence, it is a good compromise between high light energy and absorption effects of the water caused by suspended loads and dissolved solids.…”

Section: Stereo Laser-profile Systemmentioning

confidence: 86%

Development of a stereo-laser-profile-system for the optical inspection of welding seams

Ekkel

Meyer

Lühmann

et al. 2013

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:This research project focuses on the development of an optical 3D measuring system that enables high accurate surface measurements of welding seams in order to detect impurities. The systems concept is based on a stereo camera system in conjunction with a projecting line laser. A second camera system is used as tracking or positioning component to obtain the position of the measuring systems in object space. The complete stereo laser-profile system will be used as a hand-held system. The development, optimization and testing of the system components (stereo camera system with projecting laser line and tracking component) for surface measurements as well as calibration and accuracy evaluations are the main objectives within this research project. Testing procedures and probes are constructed and evaluated to verify the results. The development considers conditions for a future adaption to underwater use.

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A practical underwater 3D-Laserscanner

Cited by 15 publications

References 8 publications

Optical Sensors and Methods for Underwater 3D Reconstruction

Optical Sensors and Methods for Underwater 3D Reconstruction

Precise Laser-Based Optical 3d Measurement of Welding Seams Under Water

Development of a stereo-laser-profile-system for the optical inspection of welding seams

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