Pubblicazioni

Autori:

Giachetti, Andrea; Ciortan, IRINA-MIHAELA; Daffara, Claudia; Pintus, Ruggero; Gobbetti, Enrico

Titolo:

Multispectral RTI Analysis of Heterogeneous Artworks

Anno:

2017

Tipologia prodotto:

Contributo in atti di convegno

Tipologia ANVUR:

Contributo in Atti di convegno

Lingua:

Inglese

Formato:

Elettronico

Titolo del Convegno:

EUROGRAPHICS Workshop on Graphics and Cultural Heritage (GCH 2017)

Luogo:

Graz, A

Periodo:

September 27-29, 2017

Casa editrice:

The Eurographics Association

ISBN:

978-3-03868-037-6

Intervallo pagine:

19-28

Parole chiave:

Multispectral; Reflactance Transformation Imaging

Breve descrizione dei contenuti:

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.

Pagina Web:

https://diglib.eg.org/handle/10.2312/2631771

Id prodotto:

98998

Handle IRIS:

11562/969019

ultima modifica:

15 novembre 2022

Citazione bibliografica:

Giachetti, Andrea; Ciortan, IRINA-MIHAELA; Daffara, Claudia; Pintus, Ruggero; Gobbetti, Enrico, Multispectral RTI Analysis of Heterogeneous Artworks  in Eurographics Workshop on Graphics and Cultural Heritage , The Eurographics Association , Atti di "EUROGRAPHICS Workshop on Graphics and Cultural Heritage (GCH 2017)" , Graz, A , September 27-29, 2017 , 2017 , pp. 19-28

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