ICHIM01 Tutorial ProgramSeptember 3-4, 2001Museum & Heritage Applications of Digital 3D Imaging Track 5: Multimedia for the WebSeptember 3 Afternoon Active 3D sensing: Applications 3D projects at SIBA Coordination Latest Results Prof. Virginia Valzano(Director of SIBA Coordination) presented by Dr. Adriana Bandiera (SIBA Coordination) Eng. J-Angelo Beraldin (National Research Council of Canada, Project partner)
SIBA Coordination • SIBA Coordination is the structure of the University of Lecce that co-ordinates, manages and develops the Telematic Information System for Research and Education. • It coordinates the development of the University libraries computerization. • It coordinates relations with other national and international Universities and Research Centres for the achievement of information systems and other shared projects.
SIBA Coordination offers to scholars and students the possibility to access to a coordinated system of bibliographical and documentation resources in digital format and full-text. • SIBA Coordination is involved in the coordination and development of numerous activities and national and international projects for the retrieval and the assessment through electronic media of archaeological finds, books, and documentary material of high historical value and archival rarity.
It is engaged in the development of coordinated services aimed at: • digital reproduction • digital preservation • virtual restoration • assessment of the historical, scientific and cultural holdings of the University. • It is also engaged in the development of methodologies for the use of digital technologies within the cultural heritage field by means of the use of innovative technological and computerized systems.
SIBA Laboratories • Server Laboratory: http://siba2.unile.it/sedi/lab_serv.html • Laboratory for the acquisition and processing of bibliographical and documentary information http://siba2.unile.it/sedi/labelbib.html • Laboratory for the digital acquisition and processing of images http://siba2.unile.it/sedi/labdig1.html • GIS Lab (Geographic Information Systems) http://siba2.unile.it/sedi/labgis.html • 3D Lab (acquisition and processing of three-dimensional images) http://siba2.unile.it/sedi/lab3d.html
Staff for the 3D projects at the SIBA lab General Coordinator: Virginia Valzano Technical Responsible: Antonio Marra Collaborators: Adriana Bandiera Fabrizio Bergamo Maria Carmela Catamo Rosita Ingrosso Flavio Melcarne
Coordinated project of Catania and Lecce Universities • The project foresees the digital acquisition and processing of bibliographic and documentary information • Digital reproduction of archaeological objects and finds of particular importance • Acquisition and processing of images and three-dimensional models and environments, for restoration and virtual reconstruction.
Laboratory for the digital acquisition and processing of 2D images The Laboratory for the digital acquisition and processing of images of the SIBA Coordination, is one of the most advanced in Italy. It possesses sophisticated HW and SW equipment, which allows the acquisition of digital images at both low and high resolutions. (http://siba2.unile.it/sedi/labim.html)
The balancing platform and the HMI cold light lamps allow the acquisition of images in compliance with the regulations for the preservation of the documents.
The digital Back Dicomed allows the acquisition of colours and information invisible to the naked eye • 7520x6000 pixel (129 Mb) • The digital Back Mamiya 645 allows the acquisition at a maximum resolution of 3000x2000 pixel • The workstation allows the processing of digital images for virtual restoration Instantaneous digital back (max res. 3000 x 2000 pixels) Digital scan back (max res. 7520 x 6000 pixels)
Detail Archives of old printed books images: High resolution images: ~ 2000 x 3000 pixel Low resolution images: ~ 550 x 850 pixel Frontispiece of an old printed book
Demotic and Greek papyri archive:Original and virtual restoration Fragment of Greek papyrus of Ptolemaic era (III/II BC) containing a list of names. 3,8 cm x 8,8 cm
PUL: Papyrologica Universitatis Lupiensis Pectoral of mummy retrieved from Cartonnage 30 cm x 23 cm
Virtual restoration • The virtual restoration is not in contrast with the "traditional" restoration performed on the physical document. The virtual restoration represents a tool of cognitive integration, to obtain that information that went lost or that is unlikely deducible from the original copy. • It allows the optimization of the legibility of the textual and artistic informative data, without turning to interventions often traumatic for the original copy. • Besides, the virtual restoration is always reversible unlike the traditional one • It allows an in-depth study on possible interventions of traditional restoration.
3D Database Project Objectives Digital acquisition, processing, virtual restoration and three-dimensional reconstruction of archaeological finds, architectural structures and objects of high historical and artistic value, as well as the preservation, enhanced knowledge and increased accessibility.
3D Database Project Partners SIBA Coordination • Scuola di Specializzazione in Archeologia, Università degli Studi di Lecce • Centro di Ricerche Informatiche per i Beni Culturali, Scuola Normale Superiore di Pisa • Dipartimento di disegno industriale e tecnologia dell'architettura, Politecnico di Milano • Institute for Information Technology, National Research Council, Canada
SIBA Coordination – 3D Laboratory Mensi SOISIC 2000 3D laser scanner (short range version)
Scanner 3D laser Mensi SOISIC 2000 – technical specifications distance range: 0.8-10 m scanning speed: 100 pt/sec Field of view (FOV): 46° Panoramic FOV: 320° minimal mesh: 0.2 mm per meter size: 1 x 0.2 x 0.4 m laser wavelength: 640 nm
Supplied by scanner manufacturer
Beam divergence 0.2 mrad Adapted by user
near field mm (@ 0.6 m) far field mm Depth accuracy (mm) Tele Lens: 111 x 84 x 40 460 x 350 x 130 (@ 2.5 m) 0.19 Mid Lens: 196 x 153 x 70 830 x 622 x 220 (@ 2.5 m) 0.35 Wide Lens: 355 x 266 x 92 1200 x 903 x 400 (@ 2 m) 0.64 Vivid 900 scanning speed: 100 000 pt/sec
DELL Workstation for processing and modelling in 3D Dual 1 GHz Intel Pentium III CPUs 1 Gbyte of RAM Video adapter Intense 3D 4110 WildCat
Softwares for processing and modelling in 3D Mensi 3D Ipsos Alias/WaveFront Studio Okino Polytrans Innovmetric Polyworks Rhino Geomagic Studio Autodesk Autocad 2000i
3D Database Project 3D ARCHAEO 3D BYZANTINE
3D ARCHAEO Digital acquisition and construction of three-dimensional models of archaeological finds, environments and sites of the Salento Peninsula. Therefore the creation of several databases, as for instance the 3D stelae and cippus database and others, concerning in particular the archaeological excavations of Cavallino (LE), is expected.
3D ARCHAEO Archaeological excavations of Cavallino (LE)
3D ARCHAEO 3D Stelae and Cippus Stelae of the VIIIth and VIIth sec. b.c. and the cippus of the of the III sec. b.c., discovered in the Salento territory during some excavation sessions organized by the Archaeological Superitendence of Puglia and by University of Lecce.
3D ARCHAEO 3D Stelae and Cippus Example of stelae
3D ARCHAEO 3D Stelae & Cippus Cippus of Otranto (LE) with messapian inscriptions (III sec. b.C.)
3D ARCHAEO 3D Stelae and Cippus This example has been discovered in the territory of Cavallino (LE) in a heap of stones dumped by farmers near to a “dolina” at the centre of a fenced zone of archaic fortifications. As described by the Director of the school of archaeology of the University of Lecce, it is a fragment of a stele (33x39x12cm) rather badly preserved, very splintered and with large calcareous crusts even on the figured area.
3D ARCHAEO 3D Stelae and Cippus On the front side we see a very low and flat relief whereon we can recognize two horses attached to a two-wheel vehicle and a human shape, in a primitive representation, where all elements are taken to pieces and spread over a single plane.
3D ARCHAEO 3D Stelae and Cippus This example has been discovered in the ancient Messapian settlement of “Muro Tenente” in the province of Brindisi. It is a stele on which we can see a war chariot and two rows of hoplites with helmets and long lances. As specified by Prof. D’Andria, we can find in this stele, as in the one of Cavallino, a reticulated rectangular motif at the lateral side, and, at the front side, we see a representation in which all elements are taken into pieces and spread over a single plane. 107x51x14 cm
Stele Z uncertainty Spatial XY Resolution N. 1 (Cavallino) 0.6 mm 0.3 mm N. 2 (Muro Tenente) 1 mm 0.3 mm 3D ARCHAEO 3D Stelae and Cippus
3D ARCHAEO 3D Stelae and Cippus For both examples two 3D models have been produced, one with and the other without texture. To this purpose some digital photos have been used, produced with the digital camera Kodak Dc 265 of the Laboratory for the Digital Image Acquisition and Processing of the SIBA Coordination.
Adobe Photoshop These photos, imported in Adobe Photoshop, have been calibrated, combined, resized and adapted to the model and afterwards they have been projected on it by means of Alias/Wavefront Studio. Alias/WaveFront
3D ARCHAEO 3D Stelae and Cippus Stele n. 1 Muro Tenente (BR) 5 hours to perform all the 3D scans 3D Scan with Soisic: standoff = 2 m A total of 2D & 3D images were acquired and used for the complete model Spatial resolution = 1st model 1 mm; 2nd model scan 0.3 mm Total of about 1.200.000 points After filtering and meshing total of about 1.200.000 polygons (triangles)
3D ARCHAEO 3D Stelae and Cippus Cloud of point obtained with 3D scanner
3D ARCHAEO 3D Stelae and Cippus Shaded 3D Model
3D ARCHAEO 3D Stelae and Cippus Cloud of point obtained with 3D scanner
3D ARCHAEO 3D Stelae & Cippus Shaded 3D Model
3D ARCHAEO 3D Stelae & Cippus 3D Models with texture map From 2D images after rectification
3D ARCHAEO 3D Stelae and Cippus Stele n. 2 Cavallino (LE)
3D ARCHAEO 3D Stelae and Cippus Stele n. 2 Cavallino (LE) Work performed January 3-4, 2001 6 hours to perform all the 3D scans 3D Scan Soisic: standoff = 1.80 m A total of three 3D images were scanned and used for the complete model Spatial resolution: 1st and 2nd scan 0.6 mm; 3rd scan 0.3 mm Total of about 300.000 points After filtering and meshing total of about 272.000 polygons (triangles)