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This work proposes a system for the automatic construction of multi-spectral three-dimensional (3D) models of architecture. Besides the specific application , which concerns the interactive visualization and the restoration of historical buildings, the interest of the proposed system lies in the instrumental gap it fills in the multi-spectral nature of the(More)
The multispectral acquisition of frescoes poses unsolved challenges, the main difficulty being that it is often impossible to measure the reference white signal. We introduce a new formulation of the lightness problem for images of pictorial artworks. As artists often paint the effects of light, the albedo field can contain a component that mimics an(More)
This work proposes a system for the automatic construction of multi-spectral 3D models of architecture. Besides the specific application which concerns the interactive visualization and the restoration of historical buildings, the interest of the proposed techniques lays in the multi-spectral nature of the textures which allow rendering with faithful colors(More)
We introduce a new formulation of the lightness problem for images of artworks, such as paintings or frescoes. As artists often paint the effects of light, the albedo field can contain a component that mimics an illumination field. Therefore, new insights are needed to distinguish the effects of physical illumination and painted shading. Because paint has a(More)
This paper presents a performance characterization of the Specim ImSpector V10[1] used as the core of a spectral camera for the acquisition and analysis of works of art. The Specim ImSpector is an imaging spectrograph generally used for colorimetry applications. Our purpose is to employ it for the analysis of the spectral content in the visible and near(More)
This work presents a procedure for the 3D detection and measurement of facial swellings, an issue of paramount importance in oral and maxillofacial surgery. The considered problems are the automatic acquisition of face masks of adequate precision, the registration of the 3D masks of the same patient taken at different times during the edema evolution, and(More)
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