Geomatic Contribution for the Restoration Project of the Valentino Castle Green Room. From Data Acquisition to Integrated Documentation

Abstract

Abstract. In the framework of restoration operations, valuable assistance can be supplied from innovative techniques and methods developed in the field of Geomatics. Over the years, this continuous collaboration has produced synergistic and interdisciplinary results that have been successfully contributing to heritage conservation and valorisation. In the case of the current research, thorough multisensory investigations have been performed in order to provide a deeper knowledge of the Green Room of the Valentino Castle in Turin and to support the planning of the future restoration works that will involve this valuable asset. In the framework of this experience, four LiDAR systems have been employed in order to evaluate the different results obtainable from the sensors. Additionally, a complete photogrammetric close-range survey has been carried out, and some tests were completed using a hyperspectral camera. The workflow followed during the current research is described in this paper, and a comparison between the obtained outputs is proposed, focusing on the characteristics of these metric products, useful and sometimes necessary in the framework of the restoration project. Besides, some considerations on the advantages and the issues connected with the use of these reality-based data as a starting point for HBIM (Heritage Building Information Modeling) model generation are proposed, along with some observations about the potentialities of a photogrammetric co-registration approach using spectrum technologies for deterioration/decay detection and monitoring of heritage.

Implementation of a TeamWork-HBIM for the Management and Sustainability of Architectural Heritage

“…These data are recorded in files with great deal of information that cannot be used in BIM digital platforms. For this reason, new strategies related to the interoperability of accurate modelling systems should be developed [22], and especially those related to data management and new sustainable scenarios. This paper includes the implementation of a TeamWork-HBIM methodology that strengthens reciprocal information flows among all the participating areas of specialist technical teams and operators.…”

SFM-Based 3d Reconstruction of Heritage Assets Using Uav Thermal Images

“…If the number of extracted homologous points is too low -due to the low resolution of the images and to the low contrast between materials characterised by similar thermal emissivity (leading to similar temperatures) -the 3D reconstruction could be heavily affected by outliers if not fail. Considering the extraordinary potentialities of this kind of imagery in the framework of non-destructive investigations of heritage assets (especially if taking into account the precious possibility to enrich the high resolution 3D models with nonvisible multispectral information, following data fusion strategies) (Dlesk et al 2022;Patrucco et al 2020b), it becomes fundamental to underline how the development of new coregistration techniques can provide new effective and powerful tools for the documentation -and therefore for the safeguard -of the cultural heritage. In the particular case of this contribution, the main aim of the presented research is to test -and to evaluate -the effectiveness and the efficiency of two different SfM-based approaches in the framework of thermal images photogrammetric processing.…”

Integrated Processing of Photogrammetric and Laser Scanning Data for Frescoes Restoration

“…The combination of image-and rangebased techniques allows digitization with high metric and radiometric accuracy. This is particularly useful in the field of restoration, where accurate documentation is required for quantitative and qualitative analysis of the surfaces state of conservation (Bevilacqua et al, 2016;Patrucco et al, 2020, Gabellone et al, 2020. These two issues are fundamental, for example, in frescoed spaces.…”