<div class="csl-bib-body">
<div class="csl-entry">Mulsow, C., Sardemann, H., Gueguen, L.-A., Mandlburger, G., & Maas, H.-G. (2024). Concepts for compensation of wave effects when measuring through water surfaces in photogrammetric applications. In <i>Volume XLVIII-2-2024, 2024 | ISPRS TC II Mid-term Symposium “The Role of Photogrammetry for a Sustainable World”</i> (pp. 289–295). https://doi.org/10.5194/isprs-archives-XLVIII-2-2024-289-2024</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/199018
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dc.description.abstract
A common problem when imaging and measuring through moving water surfaces is the quasi-random refraction caused by waves. The article presents two strategies to overcome this problem by lowering the complexity down to a planer air/water interface problem. In general, the methods assume that the shape of the water surface changes randomly over time and that the water surface moves around an idle-state (calm planar water surface). Thus, moments at which the surface normal is orientated vertically should occur more frequently than others should. By analysing a sequence of images taken from a stable camera position these moments could be identified – this can be done in the image or object space. It will be shown, that a simple median filtering of grey values in each pixel position can provide a corrected image freed from wave and glint effects. This should have the geometry of an image taken through calm water surface. However, in case of multi camera setups, the problem can be analysed in object space. By tracking homological underwater features, sets of image rays hitting accidently horizontal orientated water surface areas can be identified. Both methods are described in depth and evaluated on real and simulated data.
en
dc.language.iso
en
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dc.relation.ispartofseries
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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dc.subject
Underwater and Multimedia Photogrammetry
en
dc.subject
Snell’s Law
en
dc.subject
Modelling
en
dc.subject
Image Sequence Analysis
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dc.subject
Image Correction
en
dc.title
Concepts for compensation of wave effects when measuring through water surfaces in photogrammetric applications
en
dc.type
Inproceedings
en
dc.type
Konferenzbeitrag
de
dc.contributor.affiliation
TU Dresden, Germany
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dc.contributor.affiliation
TU Dresden, Germany
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dc.contributor.affiliation
TU Dresden, Germany
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dc.description.startpage
289
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dc.description.endpage
295
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dc.type.category
Full-Paper Contribution
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tuw.booktitle
Volume XLVIII-2-2024, 2024 | ISPRS TC II Mid-term Symposium “The Role of Photogrammetry for a Sustainable World”
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tuw.container.volume
XLVIII-2-2024
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tuw.peerreviewed
true
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tuw.researchTopic.id
E4
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tuw.researchTopic.name
Environmental Monitoring and Climate Adaptation
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E120-07 - Forschungsbereich Photogrammetrie
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tuw.publisher.doi
10.5194/isprs-archives-XLVIII-2-2024-289-2024
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dc.description.numberOfPages
7
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tuw.author.orcid
0000-0001-9034-3469
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tuw.event.name
ISPRS TC II Mid-term Symposium “The Role of Photogrammetry for a Sustainable World” (2024)