Valentina Alena Girelli

Valentina Alena Girelli
University of Bologna | UNIBO · Department of Civil, Chemical, Environmental and Materials Engineering DICAM

PhD

About

40
Publications
10,784
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Introduction
The research is primarily focused on deepening the potentials and the problems of the most modern 3D surveying techniques, in particular aerial and close-range digital photogrammetry and terrestrial laser scanning, with the aim of mapping and modelling objects in a multi-scale approach, from lands to archaeological sites, from buildings to single artefacts.

Publications

Publications (40)
Article
Full-text available
In this paper some experiences in 3D modelling of objects with very high-resolution are described, carried out by the DICAM Geomatics group of the University of Bologna in multi-disciplinary contexts within the field of the Civil Engineering. In all the addressed case studies the main aim is the generation of a 3D model of the surface at a sub-mill...
Article
This paper describes the experience carried out by the Geomatics group of the DICAM Dept. (Department of Civil, Chemical, Environmental and Materials Engineering) of the University of Bologna, in collaboration with the Civic Medieval Museum, about the digitization and reproduction by 3D printing of the bas-relief of Giovanni da Legnano. This artwor...
Article
With the advent of a new arc-based additive manufacturing (AM) process, referred to as Wire-and-Arc Additive Manufacturing (WAAM), the scale of the metal printed parts increased up to several meters, thus becoming suitable for large-scale applications in marine, aerospace and construction sectors. However, specific considerations in terms of geomet...
Conference Paper
Full-text available
Over the last decades, climate change has brought more and more challenges to managers of cultural heritage and researchers. The increasing effects of natural hazards on assets have required the development of a new protocol of techniques and methodologies for the monitoring of Cultural Heritage and the adoption of management plans adapted to the n...
Article
It is well known that multi-leaf walls, cavity walls as well as rubble masonry are prone to brittle collapse mechanism due to weak transverse connections. Twisted steel bars are widely used to strengthen such kind of masonry buildings, in particular to improve the transverse connection between different structural elements. Due to the shape of the...
Conference Paper
In the project, carried out by the Geomatics group of the DICAM Department from the University of Bologna, it is discussed the integration of different sensors as an application to the field of Cultural Heritage. The fresco painting examined dates back to the beginning of the XVII century, it is found in the San Martino theatre hall, in the city ce...
Article
The use of Additive Manufacturing (AM) technologies in the construction industry is still at its pioneering stage. The first investigations indicate that, among actually available metal 3D-printing strategies, Wire-and-Arc Additive Manufacturing (WAAM) process appears to be the most suitable for realizing large-scale steel structures. Nonetheless,...
Chapter
This paper presents two examples of use of amateur video sequences for the 3D modelling of objects in Archaeology. The described case studies refer to the important archaeological sites of Cahuachi (Peru) and Tiwanaku (Bolivia), where the DICAM Dept. of the University of Bologna operated in past years with a surveying activity that involved the app...
Chapter
Among the applications of Remote Sensing for urban environments, Thermal Mapping is currently one of the most interesting, although still quite limited in usage. Airborne, drone and satellite thermal imagery can in fact provide effective data for different purposes and at different scales. The peculiar characteristics of thermal images, on the othe...
Article
Full-text available
In the field of Cultural Heritage, the availability of a complete, detailed and photo-realistic 3D model of the objects of interest permits to describe all the aspects related to geometry, colours and materials, as well as the work techniques and the decay state. Besides, it offers multiple possibilities for the documentation, the analysis and the...
Article
Full-text available
This paper shows an application of image-based 3D modelling concerning an interesting case study in the field of Cultural Heritage, a safe located in the Obellio Firmo domus in Pompeii (Italy), one of the largest and most complex houses in the ancient city. The object was strongly deformed by the eruption of Vesuvius in 79 A.D. and is currently pro...
Chapter
The paper presents some of the surveying experiences, mainly at territorial scale, performed by the authors at the site of Tilmen Höyük, in collaboration with archaeologists and researchers from other fields. Satellite imagery, multi-scale digital Photogrammetry and Space Geodesy, integrated together, allowed a modern approach to the representation...
Article
Additive Manufacturing has recently gained great importance to produce metallic structural elements for civil engineering applications. While a lot of research effort has been focused on different technologies (such as Powder Bed Fusion), there is still quite limited knowledge concerning the structural response of Wire-and-Arc Additive Manufactured...
Article
In the last decades Additive Manufacturing has gained fundamental importance in the development of digital fabrication for the automotive, aerospace, biomedical and only lately civil engineering field. In particular, the technology of Wire-and-Arc Additive Manufacturing, based on a welding process adopted on a robotic arm, is the most suitable to r...
Article
Full-text available
The paper aims to detect the main changes that occurred in the area surrounding the Mario Zucchelli Station (MZS) through analysis of multi-temporal remote sensing integrated by geophysical measurements. Specific attention was directed at realizing an integrated geomorphological study of the Boulder Clay Glacier, a partially debris-covered glacier...
Article
Full-text available
In 2016, the Municipality of Bologna (Italy) has undertaken the restoration of one of the symbols of the entire city, the Fountain of Neptune, in evident state of degradation. The works have touched upon all the aspects of this complex object and the project has seen involved the Municipality and the University of Bologna, the Istituto Superiore pe...
Article
Full-text available
WorldView-3 satellite is providing images with an unprecedented combination of high spatial and spectral resolution. The stereo capabilities and the very high resolution of the panchromatic band (0.31 m) have been fostering new applications in urban areas, where the complexity of the morphology requires a higher level of detail. The present technic...
Article
Full-text available
Airborne thermal cameras are a valuable source of information for energy analyses at city scale. The generation of accurate high-resolution thermal orthomosaics is a necessary but still challenging task, especially when a thermal camera is the only imaging sensor on-board, because of the peculiar characteristics of thermal imagery (i.e. low dynamic...
Conference Paper
This paper presents the basic concepts and the first engineering evaluations towards the development of the technology for the fully automated design and construction of 3D-printed grid-shell dome-like building structures inspired by the ideal visions of city domes. A suitable technique to realize such free-form shapes is the so-called Wire and Arc...
Article
The new geomatic techniques and technologies for surveying an archeological excavation are not limited to obtaining more accurate data or more precisely geo-referenced positions on a map, as they can lead to new approaches and, indeed, raise the concept of different dimensions relating to the handled information. The techniques on offer are now ful...
Article
Full-text available
3D city models are becoming increasingly popular and important, because they constitute the base for all the visualization, planning, management operations regarding the urban infrastructure. These data are however not available in the majority of cities: in this paper, the possibility to use geospatial data of various kinds with the aim to generat...
Article
Full-text available
The research activities described in this contribution were carried out at San Leo (Italy). The town is located on the top of a quadrangular rock slab affected by a complex system of fractures and has a wealth of cultural heritage, as evidenced by the UNESCO’s nomination. The management of this fragile set requires a comprehensive system of geomet...
Article
Full-text available
The modern Geomatics techniques, such as Terrestrial Laser Scanner (TLS) and multi-view Structure from Motion (SfM), are gaining more and more interest in the Cultural Heritage field. All the data acquired with these technologies could be stored and managed together with other information in a Historical Building Information Model (HBIM). In this...
Article
Full-text available
The current dramatic episodes of destruction of archaeological sites have again highlighted the problem of the safeguarding the threatened heritage and, if possible, recovering those damaged by all the armed conflicts of the past. The historical photogrammetry offers the possibility to recover a posteriori the geometrical and material properties o...
Article
Full-text available
A single-band surface temperature retrieval method is proposed, aiming at achieving a better accuracy by exploiting the integration of aerial thermal images with LiDAR data and ground surveys. LiDAR data allow the generation of a high resolution digital surface model and a detailed modeling of the Sky-View Factor (SVF). Ground surveys of surface te...
Article
Full-text available
Landslides of the lateral spreading type, involving brittle geological units overlying ductile terrains, are a common occurrence in the sandstone and limestone plateaux of the northern Apennines of Italy. The edges of these plateaux are often the location of rapid landslide phenomena, such as rock slides, rock falls and topples. In this paper, we p...
Article
Full-text available
The San Leo village, located near to Rimini (northern Italy), was built in the medieval period on the top of a calcarenite and sandstone plateau, affected by lateral spreading associated with secondary rock falls and topples. In fact, a number of landslides endangered the historical town since centuries. In order to describe the structural features...
Article
Full-text available
The rising attention to energy consumption problems is renewing interest in the applications of thermal remote sensing in urban areas. The research presented here aims to test a methodology to retrieve information about roof surface temperature by means of a high resolution orthomosaic of airborne thermal infrared images, based on a case study acqu...
Conference Paper
The Valmarecchia area (RN, Italy), located between the Emilia-Romagna and Marche regions, displays peculiar geological features, being characterized by rocky slabs lying on gentle slopes. The main fortified villages of the area, remarkable for historical and artistic assets, were built in the medieval period on these slabs for defense purposes. The...
Conference Paper
Terrestrial remote sensing techniques, including Terrestrial Laser Scanner (TLS), represent a valid instrument for rock slope characterization and monitoring. Their products can have different applications for landslide characterization or instability analysis, i.e. creation of high resolution Digital Terrain Models (DTM), monitoring displacements...
Article
Full-text available
The paper presents an example of integrated surveying and monitoring activities for the control of an ancient structure, the Casalecchio di Reno sluice, located near Bologna, Italy. Several geomatic techniques were applied (classical topography, high-precision spirit levelling, terrestrial laser scanning, digital close-range photogrammetry, and the...
Article
The adoption of satellite imagery in archaeology is well recognized today, and is rapidly increasing with the greater availability of high resolution sensors, in the past limited solely to military applications. The metrical use of declassified satellite images from the intelligence CORONA project, the first US operational space photo reconnaissanc...
Article
The ISPRS International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISSN: 1682-1750), Vol. XXXVl-5/C53ISSN, pages 141-146, 2007. --------------------------------------------------------------------------------------------------- The paper is related to a multi-disciplinary project started in 1999, within a coll...
Article
Full-text available
The temporal pattern of the High Reggio Emilia Apennine upper timberline during the second half of the 19<sup>th</sup> century has been studied at landscape level in the Prado-Cusna area since 1954. This part of the Northern Apennines is of outstanding biological value. Orthorectified aerial photographs (flights GAI 1954, RER 1978, IT 2000) were us...
Article
Full-text available
The generation of 3D models of objects has become an important research point in many fields of application like industrial inspection, robotics, navigation and body scanning. Recently the techniques for generating photo-textured 3D digital models have interested also the field of Cultural Heritage, due to their capability to combine high precision...
Article
Full-text available
Three main approaches for the recording, documentation and visualization of cultural heritages sites and objects are currently used: (1) image-based methods (2) range-based methods (3) a combination of image- and range-based methods. The requirements specified for many applications, including digital archiving or mapping, involve high geometric acc...
Article
Full-text available
Le soluzioni tecnologiche rese oggi disponibili dalle discipline della moderna Geomatica, offrono opportunità di grande interesse per il rilevamento nel settore dei Beni Culturali, sia per quanto riguarda il momento primario del rilievo, cioè la fase di acquisizione del dato metrico, sia per quanto concerne la questione della rappresentazione per o...
Article
The field of Cultural Heritage surveying is probably the most emblematic of potentialities offered by Geomatic technologies integration, either because of specific peculiarities presented by every case of study, and because frequently the work conditions impose a short acquisition time, a requirement that a multi-disciplinary surveying approach can...
Article
Full-text available
In the framework of the Joint Archaeological Mission of the Universities of Bologna and Lecce at the ancient town of Soknopaiou Nesos (Fayyum, Egypt) a wide-range of geomatic methodologies were experimented (GPS, total station surveys, low-height aerial and close-range photogrammetry, Visual Reality, high resolution satellite imagery, etc.). The su...
Article
The Geomatics techniques offer today very interesting opportunities for Cultural Heritage surveys. In this context the role of Photogrammetry is improved thanks to the development of new Image Matching algorithms and to the introduction of simplified digital tools that permit the realization of surveys for architectural or archaeological purposes,...

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Projects (3)
Project
Special Issue Link: https://www.mdpi.com/journal/applsci/special_issues/3D_virtual_reconstruction_archaeological_sites Dear Colleagues, It is our great pleasure to invite you to submit original contributions concerning the topic of 3D Virtual Reconstruction for Archaeological Sites. 3D virtual reconstruction for the documentation, representation, and realistic simulation of ancient contexts is today becoming increasingly important in the study of Cultural Heritage. In particular, in archeology, 3D virtual reconstructions are frequently used to recreate ancient sites and their surrounding environments for different purposes, such as study, documentation, preservation, management, restoration, dissemination, and multimedia applications for education and tourism. 3D virtual reconstructions, if done with rigorous archaeological hypotheses, allow us today to speak of "virtual archaeology" as a discipline that is increasingly spreading in the academic world, also in multidisciplinary projects. This Special Issue aims to collect high-quality papers dealing with the 3D documentation of archaeological sites, 3D digitization and modeling of Cultural Heritage, 3D virtual reconstruction of archaeological sites and their use through augmented reality (AR)/virtual reality (VR) applications. The main purpose of the Special Issue is to collect contributions about the state-of-the-art on 3D virtual reconstruction in archaeological contexts and on new methodological approaches for virtual archaeology. Examples of case studies in archaeological and museum applications will also be considered. Keywords: Cultural Heritage Archaeological sites 3D surveying 3D virtual reconstruction Virtual restoration AR/VR applications Virtual archaeology Prof. Dr. Mauro Lo Brutto Prof. Dr. Valentina Alena Girelli Guest Editors
Project
link: https://www.mdpi.com/journal/applsci/special_issues/3D_virtual_reconstruction_archaeological_sites Dear Colleagues, It is our great pleasure to invite you to submit original contributions concerning the topic of 3D Virtual Reconstruction for Archaeological Sites. 3D virtual reconstruction for the documentation, representation, and realistic simulation of ancient contexts is today becoming increasingly important in the study of Cultural Heritage. In particular, in archeology, 3D virtual reconstructions are frequently used to recreate ancient sites and their surrounding environments for different purposes, such as study, documentation, preservation, management, restoration, dissemination, and multimedia applications for education and tourism. 3D virtual reconstructions, if done with rigorous archaeological hypotheses, allow us today to speak of "virtual archaeology" as a discipline that is increasingly spreading in the academic world, also in multidisciplinary projects. This Special Issue aims to collect high-quality papers dealing with the 3D documentation of archaeological sites, 3D digitization and modeling of Cultural Heritage, 3D virtual reconstruction of archaeological sites and their use through augmented reality (AR)/virtual reality (VR) applications. The main purpose of the Special Issue is to collect contributions about the state-of-the-art on 3D virtual reconstruction in archaeological contexts and on new methodological approaches for virtual archaeology. Examples of case studies in archaeological and museum applications will also be considered. Keywords: Cultural Heritage Archaeological sites 3D surveying 3D virtual reconstruction Virtual restoration AR/VR applications Virtual archaeology Prof. Dr. Mauro Lo Brutto Prof. Dr. Valentina Alena Girelli Guest Editors
Project
The project is devoted to fully characterize metal parts realized with Wire-and-Arc Additive Manufacturing (WAAM). Geometrical investigations, mechanical tests and microstructural evaluations are performed to fully understand the behavior of metal 3D printed elements. The goal is to draw design guidelines for the realization of new-generation structural elements.