Publications

Multispectral RTI Analysis of Heterogeneous Artworks  (2017)

Authors:
Giachetti, Andrea; Ciortan, Irina Mihaela; Daffara, Claudia; Pintus, Ruggero; Gobbetti, Enrico
Title:
Multispectral RTI Analysis of Heterogeneous Artworks
Year:
2017
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 (GCH 2017)
Place:
Graz, A
Period:
September 27-29, 2017
Publisher:
The Eurographics Association
ISBN:
978-3-03868-037-6
Page numbers:
19-28
Keyword:
Multispectral; Reflactance Transformation Imaging
Short description of contents:
We propose a novel multi-spectral reflectance transformation imaging (MS-RTI) framework for the acquisition and direct analy- sis of the reflectance behavior of heterogeneous artworks. Starting from free-form acquisitions, we compute per-pixel calibrated multi-spectral appearance profiles, which associate a reflectance value to each sampled light direction and frequency. Visualiza- tion, relighting, and feature extraction is performed directly on appearance profile data, applying scattered data interpolation based on Radial Basis Functions to estimate per-pixel reflectance from novel lighting directions. We demonstrate how the pro- posed solution can convey more insights on the object materials and geometric details compared to classical multi-light methods that rely on low-frequency analytical model fitting eventually mixed with a separate handling of high-frequency components, hence requiring constraining priors on material behavior. The flexibility of our approach is illustrated on two heterogeneous case studies, a painting and a dark shiny metallic sculpture, that showcase feature extraction, visualization, and analysis of high-frequency properties of artworks using multi-light, multi-spectral (Visible, UV and IR) acquisitions.
Web page:
https://diglib.eg.org/handle/10.2312/2631771
Product ID:
98998
Handle IRIS:
11562/969019
Last Modified:
September 26, 2020
Bibliographic citation:
Giachetti, Andrea; Ciortan, Irina Mihaela; Daffara, Claudia; Pintus, Ruggero; Gobbetti, Enrico, Multispectral RTI Analysis of Heterogeneous Artworks  in Eurographics Workshop on Graphics and Cultural HeritageThe Eurographics AssociationProceedings of "EUROGRAPHICS Workshop on Graphics and Cultural Heritage (GCH 2017)" , Graz, A , September 27-29, 2017 , 2017pp. 19-28

Consulta la scheda completa presente nel repository istituzionale della Ricerca di Ateneo IRIS

Related projects
Title Department Managers
DSURF Department Informatica Andrea Giachetti
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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