Pubblicazioni

Autori:

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

Titolo:

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

Anno:

2016

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

Luogo:

Genova

Periodo:

October 5-7 2016

Casa editrice:

The Eurographics Association

ISBN:

978-3-03868-011-6

Intervallo pagine:

127-136

Parole chiave:

RTI, Reflectance, Microprofilometer

Breve descrizione dei contenuti:

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.

Pagina Web:

https://diglib.eg.org/handle/10.2312/gch20161396

Id prodotto:

93396

Handle IRIS:

11562/949893

ultima modifica:

15 novembre 2022

Citazione bibliografica:

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 Heritage , The Eurographics Association , Atti di "Eurographics Workshop on Graphics and Cultural Heritage" , Genova , October 5-7 2016 , 2016 , pp. 127-136

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