The historical images preserved in archives and in private collections represent not only a valuable documentation of objects belonging to Cultural Heritage; sometimes they are the only remained evidence of destroyed assets of our past. In the last few years, the improvement of the technologies in the framework of photogrammetric vision and the implementations of new Structure-from-Motion (SfM) algorithms allow to extract metric information's from this kind of images in order to carry out a digital reconstruction of these lost masterpieces. The study presented in this paper aims to evaluate a SfM approach to perform the 3D reconstruction of a dome collapsed in 1971 by using historical images. The final goal is to provide not only a digital replica but also a physical reconstruction of a portion of the collapsed dome as a support for the recovered fragments of the fresco originally present on the surface of the dome.
This paper describes a process started in 2011 with the use of the “mist lining” technique for a large painting by Titian, conserved in Venice uncontrolled environment. After several experiences with a specific version of the method, Valerio Garofalo’s research thesis helped the standardisation of lining procedures aiming to obtain predictable, reproducible results. This was achieved through the production of a large quantity of mock-up painting linings and samples for peel tests. The bond created with a viscoelastic adhesive appears stronger with high speed testing, if compared with the same at a lower speed, but literature shows high variability of peel speeds. Preliminary tests with different speeds for Plextol B500 allowed to compare results with literature data. The study gives a deeper understanding of the mechanisms involved in adhesion when lining with this method.
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