Monocular Photogrammetric System for 3D Reconstruction of Welds in Turbid Water View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2022-03-15

AUTHORS

Oliver Kahmen, Thomas Luhmann

ABSTRACT

This article presents a methodology for the 3D reconstruction of welds under water. A monocular measuring system, equipped with a hemispherical (dome) port, and its methodology are introduced. Furthermore, a simple but effective approach for the alignment of a dome port and the entrance pupil of a lens is presented. The alignment is mechanically supported by the presented lens alignment shell. Turbidity experiments in the laboratory quantify the accuracy of the 3D reconstruction of an underwater welded hollow weld in comparison with a high-quality reference measurement. The analyses show that the system is capable to reconstruct the surface of the weld in high quality using least-squares image matching. The quality level ranges from 0.06 mm in clear water to 0.11 mm in turbid water featuring a visibility of ~ 140 mm. More... »

PAGES

19-35

References to SciGraph publications

  • 2019-10-25. Adjustment and Calibration of Dome Port Camera Systems for Underwater Vision in PATTERN RECOGNITION
  • 2016-04-08. Underwater video dehazing based on spatial–temporal information fusion in MULTIDIMENSIONAL SYSTEMS AND SIGNAL PROCESSING
  • 2012. Refractive Calibration of Underwater Cameras in COMPUTER VISION – ECCV 2012
  • 2019-03-07. Camera Calibration Techniques for Accurate Measurement Underwater in 3D RECORDING AND INTERPRETATION FOR MARITIME ARCHAEOLOGY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s41064-022-00191-2

    DOI

    http://dx.doi.org/10.1007/s41064-022-00191-2

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1146286862


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