Search results for "virtual reconstruction."

Castellaccio of Monreale: From the Survey to the Visualisation of Virtual Reconstructions

2023

On Monte Caputo near Monreale stands a castle, presumably built in the twelfth century. The paper presents the first results of a still in progress survey activity, carried out on the entire monument using laser scanning and photogram-metric methods. This activity was carried out as part of a scientific agreement stipu-lated between the University of Palermo, Department of Architecture and the Club Alpino Siciliano, owner of the Castle. The graphic restitution of the survey provided new information and unpublished images of the castle. It was then possible to formu-late hypotheses on the virtual reconstruction of lost configurations. This was achiev-able thanks to the survey analytical read…

La memoria fotografica dell’architettura : restituzioni prospettiche e ricostruzioni

2023

This book explores perspective restitution from photographs for the reconstruction of buildings and urban sites that no longer exist or have suffered many alterations over time. Digital drawing and modelling tools overcome many of the limitations that, in the past, made perspective restitution from photographs inaccurate and inconvenient. Traditional drawing tools made perspective restitution from photographs difficult, especially when vanishing points appeared at a great distance from the image frame. The results of perspective restitution were either 1D or 2D objects, i.e. points, segments, angles, planar figures and profiles, that were revolved into the picture plane. By contrast, digita…

From aerial survey to representation and visualization: the Temple G of Selinunte

2022

The paper reports the outputs of a research work focused on the segmentation of meshes generated from aerial photogrammetric survey, aiming at the implementation of a database integrated in a web-based Information System developed with 3D-Hop technology, that uses models as the access point to information data. Segmentation is a relevant topic in cultural heritage documentation, since it is the a pre-requisite for the development of systems that connect information data to 3D models. The chosen case study is the Doric Temple G of Selinunte, an archaeological site in southern Sicily. Temple G, one of the biggest Doric Temples of Magna Graecia, it is today a huge heap of ruins, probably due t…

A virtual reconfiguration of two destroyed neighborhoods in the Old Town of Palermo

2018

The proposed contribution deals with the topic of virtual three-dimensional reconstructions on an urban scale. The choice was oriented on significant samples of city portions that over the centuries have undergone substantial transformations or distortions: the aim is to reconstruct their history backwards, starting from the current survey and using the tools of virtual representation to reconfigure the forms of the past and tell their events. From here comes the idea to create, for pieces, a hypertextual study of the urban image of Palermo: the theme of the transformation of the city, of change and of complexity, opens up differentiated research paths. The hypertext choice was almost obvio…

Toward a virtual reconstruction of an antique three-dimensional marble puzzle

2017

International audience; Abstract | Introduction | Related Work | Acquisition Setup, Proposed Prototype: Calibration and Visibility | Preprocessing of Scanned Three-Dimensional Fragment Data | Processing of Scanned Three-Dimensional Surface Data: Matching | Conclusion and Future Works | Appendices | Acknowledgments | ReferencesAbstract. The reconstruction of broken objects is an important field of research for many applications, such as art restoration, surgery, forensics, and solving puzzles. In archaeology, the reconstruction of broken artifacts is a very time-consuming task due to the handling of fractured objects, which are generally fragile. However, it can now be supported by three-dim…

Modelli interoperabili per Cultural Heritage Recording. Le cupole a torrini di Sicilia e Castiglia.

La ricerca indaga l’origine e l’evoluzione di uno specifico modello di cupola su tamburo a pianta circolare o poligonale, con contrafforti cilindrici sull’asse dei piloni della crociera. Sei casi studio in Spagna e in Sicilia sono stati studiati attraverso il riesame delle fonti storiche e sono state analizzate le matrici geometriche sottese al progetto; i casi studio ancora esistenti sono stati rilevati con metodi laser scanning e fotogrammetrici. I modelli tridimensionali sono stati utilizzati per una verifica del contributo statico offerto dai torrini alla stabilità delle strutture. The research work is focused on the origin and the modifications of a peculiar dome on tambour having a ci…

SURVEY AND VIRTUAL RECONSTRUCTION OF ANCIENT ROMAN FLOORS IN AN ARCHAEOLOGICAL CONTEXT

2019

Abstract. Despite the consistent development of approaches aimed at the virtual reconstruction of whole houses or archaeological monuments, the variety of technologies involved in virtual reconstruction procedures and the complexity of a rigorous process to provide validation models, seems to limit a univocal and shared standards adoption. For example, compared to the large number of contributions on the virtual reconstruction of whole architectures or cultural heritage sites, only a few works have proposed a rigorous workflow specific to mosaics and ancient floors and to their virtual reconstruction. The goal of this work is to present the first results on the virtual reconstruction of the…

Reconstruction of urban sites from photos

2019

Abstract. This paper reports the results of an experiment that aims at the virtual reconstruction of a urban site that has been partially reshaped during the 20th century; the reconstruction process is based on period photos. The chosen case study is the eldest harbour of Palermo, named ‘Cala’; the site was bombed during World War II and new buildings took the place of the ruined ones. Two period photos, taken from an aircraft, document the buildings that were destroyed by bombs. The 3D restitution process used the ‘inverse’ projection from period photos (2D) to the virtual space (3D) ; the first step was therefore addressed to the calculation of the inner parameters (focal length, principa…

AR to Rediscover Heritage: the Case Study of Salerno Defense System

2022

Recognizing and transmitting the uniqueness and identity of one’s territory represents fundamental step to guarantee its sustainability, protection and valorisation. Of particular importance, moreover, is the issues of the lesser-known heritage of great value but which, unfortunately, in some cases is still little known and often in a state of neglect. However, the diffusion of new technology and the great development of digitization positively contribute to the accessibility and visibility of these patrimonies, increasing the knowledge and the dissemination. This contribution focuses on one of the towers of the coastal defence system, a perfect example of a lesser-known architecture of gre…

Palazzo Lanza dei Principi di Deliella. Dai disegni di archivio di Ernesto Basile alla ricostruzione virtuale

2022

Il contributo indaga il progetto di Ernesto Basile, mai realizzato, per Palazzo Lanza dei principi di Deliella a Palermo, attraverso lo studio dei disegni originali (1895-1897). Questi consistono in 15 documenti grafici che raccolgono 5 piante, 6 prospetti e 4 viste prospettiche, che rappresentano quattro versioni di progetto con diverse soluzioni, di ognuna delle quali è possibile reperire una documentazione frammentaria e incompleta, riconducibile a tempi ideativi differenti. Il contributo ripercorre, mediante il ridisegno, il percorso compiuto da Basile per giungere dalla prima all’ultima versione, raccontando graficamente l’evoluzione della pianta dell’edificio che, dall’impianto simmet…