Abstract
Abstract. The paper presents an investigation about the combination of multispectral and 3D imaging aiming at the analysis of the condition and preservation of an ancient vase. Visible-reflected (VIS) and -induced luminescence (UVL) images are mapped to 3D models produced with image- and range-based 3D modelling techniques. The case study is an Attic vase, part of the pottery collection of the Landesmuseum Rudolfinum (Carinthia, Austria) and temporarily stored in the Institute of Archaeology of the University of Graz, Austria. The aim of this study is to exploit the added-value provided by mapping multispectral imaging onto 3D geometry for a comprehensive knowledge of the condition of a restored Cultural Heritage (CH) item.
Highlights
Non-invasive, non-contact digitization techniques are widely used in the Culture Heritage (CH) community, allowing for several applications, such as (i) documenting the state of CH assets; (ii) performing qualitative, quantitative and comparative analyses; (iii) planning conservation and preservation strategies; (iv) visualization, communication and dissemination
3D scanning and photogrammetry fall in the first category, while technical photography (TP) or multispectral imaging is mainly intended for art diagnostics, for gathering information about the different components making up an object
This work presents the combination of UVL and VIS imaging with 3D modelling, applied to an Attic vase, part of the pottery collection of the Landesmuseum Rudolfinum (Carinthia, Austria) and temporary stored at the Institute of Archaeology of the University of Graz, Austria
Summary
Non-invasive, non-contact digitization techniques are widely used in the Culture Heritage (CH) community, allowing for several applications, such as (i) documenting the state of CH assets; (ii) performing qualitative, quantitative and comparative analyses; (iii) planning conservation and preservation strategies; (iv) visualization, communication and dissemination. Multispectral imaging entails the acquisition of photographs using a broad range of wavelengths, including and extending the visible part of the electromagnetic spectrum. This method comprises two main categories: reflectance (or reflected radiation) and luminescence (emitted light or photo-induced luminescence). The most frequently used reflectance imaging techniques are visible-reflected (VIS or VISR, corresponding to standard photography, i.e. the acquisition of RGB colour information), infrared-reflected (IRR) and ultraviolet-reflected (UVR), while luminescence imaging methods include ultraviolet-induced luminescence with emission in the visible range (UVL or UIL), visible-induced visible luminescence (VIVL) and visibleinduced infrared luminescence (VIL) (Dyer et al, 2013).
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