id
	12091
Url
	https://chloe.cnr.it/s/BiDiAr/item/12091
Resource template
	Conference Paper
Resource class
	fabio:ConferencePaper
Title
	Stereofotometria per la documentazione in 3D di incisioni e rilievi. Applicazioni nell’arte preistorica della Sardegna
Creator
	Vanzi, Massimo
	Mannu, Carla
	Tanda, Giuseppa
Publisher
	CCSP
Date
	2013
Language
	ita
Abstract
	A photogrammetric technique (Photometric Stero), known since a long time, is here proposed as an agile an cheap tool for 3D recording engravings and relieves. Different from stereoscopic or monoscopic Photogrammetry, the Photometric Stereo uses a standard camera at a fixed point to take typically four snapshots of the same object under different lighting directions. Image processing gives three maps: the “Albedo” (that is the color of the surface without any shading), the x-gradient and the ygradient. From gradient maps one gets the 3D shape of the original surface, with results comparable with those obtained by the much more expensive and demanding laser scanning machines. The 3D surface, once re-colored with the original Albedo, renders highly natural virtual reconstructions.
Is Part Of
	XXV Valcamonica Symposium
Spatial Coverage
	Capo di Ponte
Cited by
	11056
Pages
	155 - 160
Homepage
	https://www.zotero.org/groups/5293298/bidiar/items/VF4NQ6RJ/item-list

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