Towards Assessing Sandstone Surface Moisture and Degradation Level from Radiometrically Corrected TLS Intensity Data
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Date
2023-12-13
Publication Type
Conference Paper
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yes
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Abstract
Water is a prevalent deterioration agent for historic masonry works, especially those made of clay-bearing sandstones. To preserve cultural heritage made of sandstone, it is important to monitor, and then detect the regions with water retention or stone deterioration. To that aim, we investigate the prospects of terrestrial laser scanner (TLS) intensities for quantifying moisture in sandstone. Through a series of experiments following the drying processes of sandstone samples, we verify that TLS intensities can serve as moisture proxies for remote-sensing water retention. We identify the theoretically most suitable wavelengths, systematic effects requiring mitigation, and promising mitigation strategies. However, we also observe that the intensities are significantly affected by the type of sandstone and its level of degradation. Our results indicate that it is possible to distinguish different sandstones and levels of artificial degradation by observing and analyzing TLS-intensity time series during the drying process.
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published
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Journal / series
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Volume
X-1/W1-2023
Pages / Article No.
567 - 574
Publisher
Copernicus
Event
ISPRS Geospatial Week 2023
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03964 - Wieser, Andreas / Wieser, Andreas
02261 - Center for Sustainable Future Mobility / Center for Sustainable Future Mobility