Search results for " ICA"
showing 10 items of 10405 documents
Integration of 3D modelling with photogrammetry applied on historical images for cultural heritage
2023
The recovery of past architecture through 3D modelling is an important challenge today to the preservation of heritage. Decisive support for the interpretation of architecture can certainly come from historical images and old photographs that fix a portion of space at a specific time, keeping it unchanged over the years. This acquisition is decisive for studying architectures of the past that can be reinterpreted and analysed. Photos, in fact, capture the advance of time and the life of a building at a precise historical moment, becoming essential documents for the study and knowledge of heritage. An additional advantage is when these old images can be processed through Structure for Motion…
Ernesto Basile e le Esposizioni Agricole Siciliane dei primi anni del ‘900
2020
In 1891 the IV Italian National Exposition was held in Palermo, the first to have a southern city as its protagonist. The area on which the pavilions were built, obtained from the expropriation of the land belonging to the Prince of Villafranca, lent itself from the following year to accommodate the housing development and new buildings to complete the Via della Libertà, a high-bourgeois boulevard that already in 1850, by cutting the same "Firriato" of the Villafranca family, had marked the expansion towards the north of the city and seen the construction of the first buildings on its eastern front. Ernesto Basile was one of the main designers of the event and future urban creations. Althou…
PERFORMANCE EVALUATIONS OF 3D WEB-SERVICES AND OPEN-SOURCE SOFTWARE FOR DIGITAL MODELING OF ARCHAEOLOGICAL FINDS
2016
The Structure From Motion (SFM) algorithms derived from Computer Vision community make image-based techniques a competitive and user friendly approach to obtain 3D information of real objects. These algorithms have been implemented in many 3D web-services and open-source software to develop free instruments for the reconstruction of very detailed 3D digital models. Their use is becoming very common above all in archaeological studies but their potentiality for metric application has not been tested at all. The aim of the work is to investigate the quality and the accuracy of 3D models obtained through 3D web-services and SFM open-source software. Different tests have been performed using so…
SfM Techniques Applied in Bad Lighting and Reflection Conditions: The Case of a Museum Artwork
2019
In recent years, SfM techniques have been widely used especially in the field of Cultural Heritage. Some applications, however, remain undefined in cases where the boundary conditions are not suitable for the technique. Examples of this are instances where there are poor lighting conditions and the presence of glass and reflective surfaces. This paper presents a case study where SfM is applied, using a DSLR camera (Nikon D5200), to the “Head of Hades” inside a glass theca and under a large number of light sources at different distances and of different intensities and sizes. The geometric evaluation has been made comparing the DSLR camera model against the 3D data acquired with structured l…
Survey and Photogrammetric Restitution of Monumental Complexes: Issues and Solutions—The Case of the Manfredonic Castle of Mussomeli
2019
The latest results obtained through photogrammetric restitution enhanced by GNSS (Global Navigation Satellite System) RTK (Real-Time Kinematic) survey achieved increased levels of accuracy. These survey solutions are used to rapidly obtain a detailed model with an excellent level of accuracy (centimetric) with cheaper equipment. However, the contour conditions are not always favorable for obtaining the best results in a simple way. The work presented in this paper shows the survey and the photogrammetric restitution of the Manfredonic Castle of Mussomeli in Sicily, developed as a part of the PON NEPTIS European Project, aimed at the valorization of Cultural Heritage (CH). This case is a typ…
Vision metrology and Structure from Motion for archaeological heritage 3D reconstruction: A Case Study of various Roman mosaics
2017
<p class="Abstract">Vision metrology and computer vision can be successfully used for archaeological heritage 3D reconstruction in very high precision 3D measurement projects. Of those archaeological objects requiring very accurate measurements (&lt;1 mm), ancient mosaics comprise some of the most important. The aim of this paper is to assess the photogrammetric/computer vision approach in a vision metrology context as part of a 3D mosaics survey. In order to evaluate the optimal photogrammetric/computer vision workflow in this work, three different surveys were performed on three mosaics of different sizes and locations. Two of these are stored at the <em>Antonino Salinas&l…
Riscoprire: forma e storia della Torre di Fuonti
2022
The defensive system of the Amalfi Coast represents a testimony of our past, to be known, preserved and protected, a heritage to be treasured and passed on. Despite the great importance and value, some towers have been abandoned because over the years becoming unfit for the use and obsolete. The role of virtual reconstruction, in this regard, is particularly important because it supports the valorization of the heritage, the knowledge of the territory and the dissemination of the culture of our country. The contribution is a part of a wider study aimed at the divulgation of the defensive system of the Amalfi Coast. The paper focuses on a tower named Torre della Punta di Fuenti (di Fuonti or…
Rediscovering the coastal towers of Salerno. History and representation
2023
The focus is on the ongoing developments in the field of digitisation for the preservation and conservation of Cultural Heritage. The work draws attention to the important and necessary multidisciplinary approach, which inextricably links history and new technologies in the field of survey and representation. The case study concerns the defence system of coastal towers in the province of Salerno, an area that has always been rich in history and a crossroads of peoples and civilisations. The use of new technologies in the conservation of historical and architectural heritage is in fact a fundamental step to improve the analysis, conservation and dissemination of these sites and buildings. Af…
Exploiting Low-Cost 3D Imagery for the Purposes of Detecting and Analyzing Pavement Distresses
2020
Road pavement conditions have significant impacts on safety, travel times, costs, and environmental effects. It is the responsibility of road agencies to ensure these conditions are kept in an acceptable state. To this end, agencies are tasked with implementing pavement management systems (PMSs) which effectively allocate resources towards maintenance and rehabilitation. These systems, however, require accurate data. Currently, most agencies rely on manual distress surveys and as a result, there is significant research into quick and low-cost pavement distress identification methods. Recent proposals have included the use of structure-from-motion techniques based on datasets from unmanned a…
Digital Technologies for the Fruition of Archaeological Heritage. The Visualisation of the Temple C Metopes Polychrome in Selinunte
2019
Through the tools of the representation this paper investigates a hypothetical virtual re-presentation of the metopes original polychromies. The reconstructive interpretative process was carried out through a critical reading of historical and iconographic sources. Starting from the reading of drawings made by Angell and Harris at the time of the archaeological finds, of Hittorff’s studies and watercolors, and of some coloured fragments still observable in the original metopes, the graphic elaborations that simulate the original polychromes have been prepared. The purpose of this study and of the analysis here described is the experimentation of an interactive visualisation application (aug…