Documenting carved stones from 3D models. Part II — Ambient occlusion to reveal carved parts.
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 oc...
| Publicado en: | Journal of Cultural Heritage Vol. 49; pp. 28 - 38 |
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| Autores principales: | , , , , , , , |
| Formato: | Artículo |
| Publicado: |
Elsevier B.V.
May2021
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=150852921&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 150852921 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 12962074 KK8 jtl: Journal of Cultural Heritage issn: 12962074 maglogo: N pubinfo: dt: May2021 vid: 49 pid: 467 pub: Elsevier B.V. artinfo: ui: 150852921 10.1016/j.culher.2021.03.006 ppf: 28 ppct: 10 formats: tig: atl: Documenting carved stones from 3D models. Part II — Ambient occlusion to reveal carved parts. aug: au: Rolland, Tanguy Monna, Fabrice Magail, Jérôme Esin, Yuri Navarro, Nicolas Wilczek, Josef Gantulga, Jamiyan-Ombo Chateau-Smith, Carmela affil: ARTEHIS, UMR CNRS 6298, Université Bourgogne–Franche Comté, 6 Boulevard Gabriel, Bat. Gabriel, 21000 Dijon, France Musée d'Anthropologie préhistorique de Monaco, 56 bis, boulevard du Jardin exotique, 98000 MC, Monaco Khakassian Research Institute for Language, Literature and History, 23, Shchetinkin Street, 655017 Abakan, Republic of Khakassia, Russia EPHE, PSL Research University, 21000 Dijon, France Biogéosciences UMR CNRS 6282, Université Bourgogne Franche-Comté, 6, boulevard Gabriel, 21000 Dijon, France Department of Archaeology, Philosophical Faculty of the University of Hradec Králové, Rokitanského 62, 50003 Hradec Králové, Czech Republic Institute of Archaeology, Mongolian Academy of Sciences, Jucov Street-77, Ulaanbaatar 13343, Mongolia CPTC, EA4178, Université de Bourgogne, 4, boulevard Gabriel, 21000 Dijon, France su: Rock art (Archaeology) Petroglyphs Three-dimensional imaging Computational geometry Mongols Deer Mongolia sug: subj: Mongolia Rock art (Archaeology) Petroglyphs Three-dimensional imaging Computational geometry Mongols Deer keyword: Archaeology Deer stone Documentation Late bronze age Rock art Volumetric obscurance ab: 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. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2021 holdings: @attributes: islocal: N |
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