From 2D (to 3D) to 2.5D – Not all gridded digital surfaces are created equally

Conference paper

Geert J. Verhoeven, Markus Santner, Immo Trinks
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, VIII-M-1-2021, 2021, pp. 171-178

DOI: 10.5194/isprs-annals-VIII-M-1-2021-171-2021

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APA Click to copy
Verhoeven, G. J., Santner, M., & Trinks, I. (2021). From 2D (to 3D) to 2.5D – Not all gridded digital surfaces are created equally. In ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (Vol. VIII-M-1-2021, pp. 171–178). https://doi.org/10.5194/isprs-annals-VIII-M-1-2021-171-2021

Chicago/Turabian Click to copy
Verhoeven, Geert J., Markus Santner, and Immo Trinks. “From 2D (to 3D) to 2.5D – Not All Gridded Digital Surfaces Are Created Equally.” In ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, VIII-M-1-2021:171–178, 2021.

MLA Click to copy
Verhoeven, Geert J., et al. “From 2D (to 3D) to 2.5D – Not All Gridded Digital Surfaces Are Created Equally.” ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. VIII-M-1-2021, 2021, pp. 171–78, doi:10.5194/isprs-annals-VIII-M-1-2021-171-2021.

BibTeX Click to copy

@inproceedings{verhoeven2021a,
  title = {From 2D (to 3D) to 2.5D – Not all gridded digital surfaces are created equally},
  year = {2021},
  journal = {ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
  pages = {171-178},
  volume = {VIII-M-1-2021},
  doi = {10.5194/isprs-annals-VIII-M-1-2021-171-2021},
  author = {Verhoeven, Geert J. and Santner, Markus and Trinks, Immo}
}

Abstract
The surface of most heritage objects holds important clues about their creation. To answer specific research questions about a 16thcentury mural painting located in the Bischofstor of Vienna's St. Stephen's Cathedral, the three-dimensional (3D) geometry of the entire painted surface was digitised in minuscule detail using thousands of overlapping photographs. Although this article provides image acquisition and processing specifics, it aims to assess which image-based modelling workflow can achieve the most detailed, noise-free, two-and-a-half dimensional (2.5D) raster surface of this mural painting. Other than their full 3D counterparts and in contrast to the focus of most academic research, 2.5D raster surfaces are ideally suited for visualising and analysing sizeable, detailed surfaces. They are, therefore, still the preferred surface encoding of many heritage projects that want to leverage digital surface approximations to further heritage insights (and not just use them as mere eyecatchers). In the end, only a combination of different 2.5D rasters was able to accurately represent the variable surface of this mural painting with the right amount of spatial detail.