From Documentation Images to Restauration Support Tools: A Path Following the Neptune Fountain in Bologna Design Process

Abstract

ABSTRACT:The sixteenth-century Fountain of Neptune is one of Bologna's most renowned landmarks. During the recent restoration activities of the monumental sculpture group, consisting in precious marbles and highly refined bronzes with water jets, a photographic campaign has been carried out exclusively for documentation purposes of the current state of preservation of the complex. Nevertheless, the highquality imagery was used for a different use, namely to create a 3D digital model accurate in shape and color by means of automated photogrammetric techniques and a robust customized pipeline. This 3D model was used as basic tool to support many and different activities of the restoration site. The paper describes the 3D model construction technique used and the most important applications in which it was used as support tool for restoration: (i) reliable documentation of the actual state; (ii) surface cleaning analysis; (iii) new water system and jets; (iv) new lighting design simulation; (v) support for preliminary analysis and projectual studies related to hardly accessible areas; (vi) structural analysis; (vii) base for filling gaps or missing elements through 3D printing; (viii) high-quality visualization and rendering and (ix) support for data modelling and semantic-based diagrams.

Evaluating Smartphones Color Fidelity and Metric Accuracy for the 3d Documentation of Small Artifacts

“…In our tests we employed a well-established 3D reconstruction pipeline, successfully tested in many heritage case studies Apollonio et al, 2017a;Apollonio et al, 2017b) starting from RAW photographs and consisting of a customized, optimized and automated procedure, able to improve the traditional solution based on SfM and dense stereo matching. The first step deals with a completely automated image preprocessing, aimed at enhancing photograph quality (radiometric calibrated images) carried out by SHAFT application (SAT & HUE Adaptive Fine Tuning (Gaiani and Ballabeni, 2018), and yielding better results during the following photogrammetric processing, i.e.…”

Managing Cultural Heritage With Integrated Services Platform

“…The definition of the semantic structure was instrumental in reaching a clear hierarchy of the monument and so making it more effective for information to be linked to the 3D elements without being scattered on an overly extended surface, conversely in the correct level of detail. Moreover, another essential task was the development of the conceptual data model of the Information System in order to explore possible relationships between data, involved operators, operating fields, processes and activities, and chronological steps of the restoration project of the fountain, for a rapid online dataentry and query in the web platform (Apollonio et al, 2017a); (ii) in the SACHER project the team was in charge of two main tasks: (a) the photogrammetry-based acquisition of the case study (Palazzo del Podestà, Bologna); (b) the data modelling of the SACHER 3D CH service in terms of designing processes and tools for restorers or administration operators. The first activity was carried out in stages, capturing the whole block for photogrammetric reconstruction based on a customised workflow (Gaiani et al, 2016c) and planning a subsequent specific campaign to assure colour fidelity to the 3D model (Gaiani et al, 2016a;Gaiani et al, 2017); thus the digital 3D model has been semantically structured (Figure 3) following the architectural categorisation into elementary elements according to architectural features (Ballabeni et al, 2015;.…”

Negro Tower: Documentation, Conservation, and Restoration

“…The use of digital 3D simulation as a reliable enduring reference for restoration and maintenance practice through an Information System (IS) has been widely demonstrated (Apollonio et al, 2017).…”