Evaluating the Impact of Lighting Conditions on Photogrammetric Acquisition of Cultural Heritage

Simple item page
dc.contributor.authorGangi, Federicoen_US
dc.contributor.authorShafqat, Malik Umairen_US
dc.contributor.authorGuidi, Gabrieleen_US
dc.contributor.editorCampana, Stefanoen_US
dc.contributor.editorFerdani, Danieleen_US
dc.contributor.editorGraf, Holgeren_US
dc.contributor.editorGuidi, Gabrieleen_US
dc.contributor.editorHegarty, Zackaryen_US
dc.contributor.editorPescarin, Sofiaen_US
dc.contributor.editorRemondino, Fabioen_US
dc.date.accessioned2025-09-05T20:06:00Z
dc.date.available2025-09-05T20:06:00Z
dc.date.issued2025
dc.description.abstractAccurate documentation of cultural heritage artifacts is essential for study, conservation, and exhibition. While optimal lighting is known to minimize photogrammetric uncertainty, the quantitative impact of progressively deteriorating illumination, when compensated by ISO adjustments, remains underexplored. This study experimentally evaluates how varying ISO levels affect the geometric accuracy of dense 3D point clouds generated through Structure from Motion / Image Matching (SfM/IM). A sandstone sample, previously digitized with a high accuracy structured light scanner, served as the reference model. Three cameras of different generations were tested in a controlled darkroom, with lighting progressively reduced and exposure adjusted to maintain correct image brightness. Results reveal an unexpectedly stable measurement uncertainty across a wide ISO range (ISO 100-51,200 for the Sony α7R IV, ISO 100-6,400 for the Nikon D810, and ISO 100- 3,200 for the Canon EOS 4000D), followed by a sharp accuracy drop at the highest ISO setting of each device. While geometric accuracy remained largely unaffected within these ranges, tie point counts decreased and reprojection errors increased steadily with ISO, indicating a gradual loss of feature robustness. These findings show that modern sensors can sustain high-accuracy photogrammetry far beyond traditionally accepted ISO limits, offering practical tolerance thresholds for reliable heritage documentation under challenging lighting conditions.en_US
dc.description.sectionheadersDigitization and Technology
dc.description.seriesinformationDigital Heritage
dc.identifier.doi10.2312/dh.20253128
dc.identifier.isbn978-3-03868-277-6
dc.identifier.pages10 pages
dc.identifier.urihttps://doi.org/10.2312/dh.20253128
dc.identifier.urihttps://diglib.eg.org/handle/10.2312/dh20253128
dc.publisherThe Eurographics Associationen_US
dc.rightsAttribution 4.0 International License
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleEvaluating the Impact of Lighting Conditions on Photogrammetric Acquisition of Cultural Heritageen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
dh20253128.pdf
Size:
1.64 MB
Format:
Adobe Portable Document Format
Download
Collections
Track 04 – Acquisition and Digitization