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Name
CRS4 Open Archive
Type
Institutional Repository
Items
6 Publications
Compatibility
OpenAIRE 3.0 (OA, funding)
OAI-PMH
http://oai.crs4.it/oai/request
More information
Detailed data provider information (OpenDOAR)

 

  • Mobile Graphics

    Agus, Marco; Gobbetti, Enrico; Marton, Fabio; Pintore, Giovanni; Vázquez, Pere-Pau (2017)
    Projects: EC | Scan4Reco (665091)
    The increased availability and performance of mobile graphics terminals, including smartphones and tablets with high resolution screens and powerful GPUs, combined with the increased availability of high-speed mobile data connections, is opening the door to a variety of networked graphics applications. In this world, native apps or mobile sites coexist to reach the goal of providing us access to a wealth of multimedia information while we are on the move. This half-day tutorial provides a tec...

    Guided Robust Matte-Model Fitting for Accelerating Multi-light Reflectance Processing Techniques

    Pintus, Ruggero; Giachetti, Andrea; Pintore, Giovanni; Gobbetti, Enrico (2017)
    Projects: EC | Scan4Reco (665091)
    The generation of a basic matte model is at the core of many multi-light reflectance processing approaches, such as Photometric Stereo or Reflectance Transformation Imaging. To recover information on objects’ shape and appearance, the matte model is used directly or combined with specialized methods for modeling high-frequency behaviors. Multivariate robust regression offers a general solution to reliably extract the matte component when source data is heavily contaminated by shadows, inter-r...

    Multispectral RTI Analysis of Heterogeneous Artworks

    Giachetti, Andrea; Ciortan, Irina; Daffara, Claudia; Pintus, Ruggero; Gobbetti, Enrico (2017)
    Projects: EC | Scan4Reco (665091)
    We propose a novel multi-spectral reflectance transformation imaging (MS-RTI) framework for the acquisition and direct analysis 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. Visualization, relighting, and feature extraction is performed directly on appearance profile data, applying scattered data i...

    A Novel Framework for Highlight Reflectance Transformation Imaging

    Giachetti, Andrea; Ciortan, Irina; Daffara, Claudia; Marchioro, Giacomo; Pintus, Ruggero; Gobbetti, Enrico (2017)
    Projects: EC | Scan4Reco (665091)
    We propose a novel pipeline and related software tools for processing the multi-light image collections (MLICs) acquired in different application contexts to obtain shape and appearance information of captured surfaces, as well as to derive compact relightable representations of them. Our pipeline extends the popular Highlight Reflectance Transformation Imaging (H-RTI) framework, which is widely used in the Cultural Heritage domain. We support, in particular, perspective camera modeling, per-...

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

    Ciortan, Irina; Pintus, Ruggero; Marchioro, Giacomo; Daffara, Claudia; Giachetti, Andrea; Gobbetti, Enrico (2016)
    Projects: EC | Scan4Reco (665091)
    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 studied 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...
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