Publications

A Practical Reflectance Transformation Imaging Pipeline for Surface Characterization in Cultural Heritage  (2016)

Authors:
Ciortan, Irina Mihaela; Pintus, Ruggero; Marchioro, Giacomo; Daffara, Claudia; Giachetti, Andrea; Gobbetti, Enrico
Title:
A Practical Reflectance Transformation Imaging Pipeline for Surface Characterization in Cultural Heritage
Year:
2016
Type of item:
Contributo in atti di convegno
Tipologia ANVUR:
Contributo in Atti di convegno
Language:
Inglese
Format:
Elettronico
Congresso:
Eurographics Workshop on Graphics and Cultural Heritage
Place:
Genova
Period:
October 5-7 2016
Publisher:
The Eurographics Association
ISBN:
978-3-03868-011-6
Page numbers:
127-136
Keyword:
RTI, Reflectance, Microprofilometer
Short description of contents:
We present a practical acquisition and processing pipeline to characterize the surface structure of cultural heritage objects. Using a free-form Reflectance Transformation Imaging (RTI) approach, we acquire multiple digital photographs of the stud- ied object shot from a stationary camera. In each photograph, a light is freely positioned around the object in order to cover a wide variety of illumination directions. Multiple reflective spheres and white Lambertian surfaces are added to the scene to automatically recover light positions and to compensate for non-uniform illumination. An estimation of geometry and re- flectance parameters (e.g., albedo, normals, polynomial texture maps coefficients) is then performed to locally characterize surface properties. The resulting object description is stable and representative enough of surface features to reliably provide a characterization of measured surfaces. We validate our approach by comparing RTI-acquired data with data acquired with a high-resolution microprofilometer.
Web page:
https://diglib.eg.org/handle/10.2312/gch20161396
Product ID:
93396
Handle IRIS:
11562/949893
Deposited On:
October 7, 2016
Last Modified:
November 2, 2016
Bibliographic citation:
Ciortan, Irina Mihaela; Pintus, Ruggero; Marchioro, Giacomo; Daffara, Claudia; Giachetti, Andrea; Gobbetti, Enrico, A Practical Reflectance Transformation Imaging Pipeline for Surface Characterization in Cultural Heritage  in Eurographics Workshop on Graphics and Cultural HeritageThe Eurographics AssociationProceedings of "Eurographics Workshop on Graphics and Cultural Heritage" , Genova , October 5-7 2016 , 2016pp. 127-136

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Scan4Reco - Multimodal Scanning of Cultural Heritage Assets for their multilayered digitization and preventive conservation via spatiotemporal 4D Reconstruction and 3D Printing Department Informatica Claudia Daffara
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