Abstract
The aim of this work is to present a new practical approach to digital photogrammetry to obtain 3D models of polychromatic sculptures under ultraviolet fluorescence and near-infrared by starting from photographic images. This digital photogrammetry was applied recently to a 17th-century reliquary bust representing St. Rodonio, a saint particularly venerated by the Orthodox Church, presently under restoration in the Laboratories of University of Tuscia and belonging to the Museum of Colle del Duomo of Viterbo (Italy). The acquisitions of ultraviolet fluorescence and infrared frames were performed using a Nikon D5300 digital SLR camera and a modified low-cost digital camera (Samsung Model NX3300), respectively. The three-dimensional UV and IR models were obtained using Agisoft PhotoScan® software. The generated ultraviolet 3D model of the bust makes visible, in a single file, the fluorescence induced by UV radiation on the entire sculpture, highlighting surface abrasions, organic dyes, and ancient protective features. The infrared 3D model allowed for better definition of the details of the drawing used for eyes, nose and mouth definition. In conclusion, the ultraviolet fluorescence and IR 3D models of Saint Rodonio were particularly useful as documentation tools for the conservation status and for the painting construction, allowing us to perfectly map the original and restoration materials and to detect the drawing in single dynamic 3D files following a totally non-invasive, cost-effective, and rapid approach.
Highlights
The aim of this paper is to report the potentiality of ultraviolet fluorescence (UVF) and infrared (IRR) photography applied on 3D models generated through digital photogrammetry
The 3D model with ultraviolet fluorescence rendering performed before restoration allows for
The 3D model with ultraviolet fluorescence rendering performed before restoration allows for the the localizing and characterizing of some materials and the general conservation status of the localizing and characterizing of some materials and the general conservation status of the surfaces surfaces based on specific fluorescence responses
Summary
The aim of this paper is to report the potentiality of ultraviolet fluorescence (UVF) and infrared (IRR) photography applied on 3D models generated through digital photogrammetry. To our knowledge, this cost-effective approach was never applied to wooden polychromatic sculptures, but only to paintings, with the aim of investigating the surface layers [1,2]. During the documentation process in restoration, it is common to use two-dimensional systems, such as photographs, textual notes, and graphical maps, to record the alteration, decay, additions, sampling points, etc. The 3D models allow for the transferring of all information on a single file and permit the observation of the entire object surface by rotating the models [9]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
