Documenting carved stones from 3D models. Part II - Ambient occlusion to reveal carved parts
| Autor: | Josef Wilczek, Jérôme Magail, Fabrice Monna, Nicolas Navarro, Jamiyan-Ombo Gantulga, Tanguy Rolland, Yuri N. Esin, Carmela Chateau-Smith |
|---|---|
| Přispěvatelé: | Archéologie, Terre, Histoire, Sociétés [Dijon] (ARTeHiS), Ministère de la Culture et de la Communication (MCC)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Musée d'anthropologie préhistorique de Monaco, Khakassian Research Institute for Language, Literature and History, École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL), Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Department of Archaeology, University of Hradec Králové, Institute of Archaeology, Mongolian Academy of Sciences (MAS), Centre Pluridisciplinaire Textes et Cultures [Dijon] (CPTC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB), Research funded by the Joint MissionMongolia–Monaco and the project ROSAS (uB-FC and RNMSH)., Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Archeology
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory Computer science Materials Science (miscellaneous) ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology Conservation Documentation 01 natural sciences Software Computer graphics (images) Rock art Volumetric obscurance Projection (set theory) Deer stone Spectroscopy ComputingMethodologies_COMPUTERGRAPHICS business.industry 010401 analytical chemistry Visibility (geometry) Mongolia 021001 nanoscience & nanotechnology Computational geometry 0104 chemical sciences Identification (information) Archaeology Chemistry (miscellaneous) Late bronze age Ambient occlusion 0210 nano-technology Scale (map) business General Economics Econometrics and Finance |
| Zdroj: | Journal of Cultural Heritage Journal of Cultural Heritage, Elsevier, 2021, 49, pp.28-37. ⟨10.1016/j.culher.2021.03.006⟩ |
| ISSN: | 1296-2074 |
| Popis: | 10 pages; International audience; Revealing carved parts in rock art is of primary importance and remains a major challenge for archaeological documentation. Computational geometry applied to 3D imaging provides a unique opportunity to document rock art. This study evaluates five algorithms and derivatives used to compute ambient occlusion and sky visibility on 3D models of Mongolian stelae, also known as deer stones. By contrast with the previous companion work, models are processed directly in 3D, without preliminary projection. Volumetric obscurance gives the best results for the identification of carved figures. The effects of model resolution and parameters specific to ambient occlusion are then evaluated. Keeping tridimensional information intact allows accurate measurement of distance, volume, and depth. Objects augmented by ambient occlusion can easily be manipulated in 3D viewers, for seamless and effortless access to the overall organization of the figures, at the scale of the entire object. Qualitatively speaking, the 2D projected outputs are equivalent to, or even better than, existing archaeological documentation. The proposed workflow should be easily applicable in many situations, particularly as the functions provided for the free R programming software are fully configurable. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect