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The great amount of data that will be produced during the imaging of Mercury by the stereo camera (STC) of the BepiColombo mission needs a compromise with the restrictions imposed by the band downlink that could drastically reduce the... more
The great amount of data that will be produced during the imaging of Mercury by the stereo camera (STC) of the BepiColombo mission needs a compromise with the restrictions imposed by the band downlink that could drastically reduce the duration and frequency of the observations. The implementation of an on-board real time data compression strategy preserving as much information as possible is therefore mandatory. The degradation that image compression might cause to the DTM accuracy is worth to be investigated. During the stereo-validation procedure of the innovative STC imaging system, several image pairs of an anorthosite sample and a modelled piece of concrete have been acquired under different illumination angles. This set of images has been used to test the effects of the compression algorithm (Langevin and Forni, 2000) on the accuracy of the DTM produced by dense image matching. Different configurations taking in account at the same time both the illumination of the surface and...
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The research group with the responsibility of the STereo Camera (STC) for the ESA BepiColombo mission to Mercury, has realized an innovative and compact camera design in which the light collected independently by two optical channels at... more
The research group with the responsibility of the STereo Camera (STC) for the ESA BepiColombo mission to Mercury, has realized an innovative and compact camera design in which the light collected independently by two optical channels at ±20° with respect to the nadir direction converges on unique bidimensional detector. STC will provide the 3Dmapping of Mercury surface, acquiring images from two different perspectives. A stereo validation setup has been developed in order to give a much greater confidence to the novel instrument design and to get an on ground verification of the actual accuracies in obtaining elevation information from stereo pairs. A series of stereo-pairs of an anorthosite stone sample (good analogue of the hermean surface) and of a modelled piece of concrete, acquired in calibration clean room by means of an auxiliary optical system, have been processed in the photogrammetric pipeline using image correlation for the 3D model generation. The stereo reconstruction validation has been performed by comparing the STC DTMs (Digital Terrain Models) to an high resolution laser scanning 3D model of the stone samples as reference data. The latter has a much higher precision (ca. 20 μm) of the expected in-lab STC DTM (190 μm). Processing parameters have been varied in order to test their influence on the DTM generation accuracy. The main aim is to define the best illumination conditions and the process settings in order to obtain the best DTMs in terms of accuracy and completeness, seeking the best match between the mission constraints and the specific matching aspects that could affect the mapping process.
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The main objective of the TYRGEONET (TYRrhenian GEOdetic NETwork) project is to perform a geodetic survey by means of the Global Positioning System technique in that region of the Mediterranean area where many geodynamical phenomena, that... more
The main objective of the TYRGEONET (TYRrhenian GEOdetic NETwork) project is to perform a geodetic survey by means of the Global Positioning System technique in that region of the Mediterranean area where many geodynamical phenomena, that most influence the evolution of the basin are located. The project supports other researches regarding the detection of active deformation in the Central Mediterranean. The TYRGEONET is a collaborative project between many Italian and foreign Institutions, like the Centre Spatial de Toulose (F), the Institut de Physique du Globe, Paris (F), the Institut de la Meteorologie, Tunis (TN), the Institut Preparatoire Technique du Nabeul (TN), the Universities of Lubiana (YU) Thessaloniki (GR), and Zagabria (YU).
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The need to organise and rationalise maintenance interventions on road pavements, through management systems that are cost-effective and functional, has led to the setting up of Pavement Management Systems (PMS). These systems consider... more
The need to organise and rationalise maintenance interventions on road pavements, through management systems that are cost-effective and functional, has led to the setting up of Pavement Management Systems (PMS). These systems consider the objectives of transportation-related policies, as well as budget limitations of road infrastructure Management Authorities. They also provide for the arrangement of urgent maintenance works, when the paving deterioration is particularly harsh. In addition, there is a need to adjust a PMS according to the actual situations and to plan outlay, times and feasibility. This paper presents a method to survey the deterioration state of road paving and to manage the maintenance intervention through a non-destructive system based on terrestrial laser scanners. The images related to the deterioration state have been acquired by different resolution sensors; segmentation, extraction and classification operations have also been done. The images have been comp...
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The most important steps towards a plausible reconstruction of road routes comprise the evaluation of the viability of those same directrices and the measurement, along their pathways, of the distances between one stopping place and... more
The most important steps towards a plausible reconstruction of road routes comprise the evaluation of the viability of those same directrices and the measurement, along their pathways, of the distances between one stopping place and another. All this needs to be evaluated taking into consideration the slopes and the morphological features of the territory in order that the results will be as reliable as possible. For an integrated approach between archaeology and geomatic, the possible ancient road network of southern Cappadocia (Turkey) was investigated on the basis of a good quality Digital Elevation Model of the area. This analysis allowed (a) an evaluation of the viability (or the impracticality) of those same roads in terms of ‘effort’ and of loss/gain in altitude; (b) for the determination of the possible correspondence between the actual distances (measured in kilometres) and the Roman miles registered mainly in the ancient itineraries; (c) an attempt to be made to localize with greater precision those settlements which are well known in the archaeological literature, but not properly identified on the ground. This research was developed through a standard gis environment. In particular, as far as the slope analysis and the management of the DEM are concerned, the open-source software Quantumgis was used. Such an analysis, characterised by a multi-disciplinary approach, seems both to confirm the results previously obtained through an archaeological/topographic research and to propose a more adequate reconstruction of the road network of that border land linking East and West.
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Laser scanner methodology is evaluated as one of the most efficiency survey tecnique for the production of tridimensional digital models: it allows to obtain high precision and high volume data with low costs and short time. This... more
Laser scanner methodology is evaluated as one of the most efficiency survey tecnique for the production of tridimensional digital models: it allows to obtain high precision and high volume data with low costs and short time. This methodology was adopted for the tridimensional survey of Santo Sepolcro Church, belonging to the whole monumental of Santo Stefano Church in Bologna. This object has been chosen for the great historical architectural interest of the sanctuary, which needs of metric information and morphologis. 17 terrestrial laser scans have been acquired into the Santo Sepolcro Church with the goal to reconstruct the 3D model of the main central structure. The Cyrax 2500 laser scanner for the acquisition of points clouds and the Cyclone software for the alignment of the scanning have been used for the morphometric survey. The co-registration of the scanning has been performed using high reflectivity artificial targets: the coordinates of the targets have been acquired by the total station TC 2003 in order to register the points clouds in the same local reference system
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The hypogea of the Punic necropolis of Nora represented a testing ground for the use of photogrammetry as an archaeological survey tool in a highly critical context, both from the point of view of the survey itself and from the point of... more
The hypogea of the Punic necropolis of Nora represented a testing ground for the use of photogrammetry as an archaeological survey tool in a highly critical context, both from the point of view of the survey itself and from the point of view of the understanding and dissemination of the underground evidence. The study describes the acquisition techniques and the tools used to share the 3D models, both among the research team and with external users, with a specific focus on web-based tools (Potree).
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This paper focuses on a GIS-based spatial analysis dealing with the Roman-Byzantine routes of central Cappadocia, Turkey. Taking into consideration the various typologies of settlements and their distribution within that region, we... more
This paper focuses on a GIS-based spatial analysis dealing with the Roman-Byzantine routes of central Cappadocia, Turkey. Taking into consideration the various typologies of settlements and their distribution within that region, we approached the issue from an operational research perspective.The spatial analysis started from a meta-heuristic algorithm, based on Genetic Algorithms, implemented to find the ‘best’ path from the site of Tyana (modern Kemerhisar) to the site of Colonia Acrhelais/Koloneia (today Aksaray). The algorithm was applied to a cost weighted map, elaborated overlaying the ASTER Global Digital Elevation Model and other raster layers with journey ‘friction’ or ‘facilitation’ factors. In this way, depending on the presence/absence of physical obstacles, or on the level of visibility ‘from the roads’ or ‘of the roads’, each cell of the weighted map was defined by a specific value: the higher the values of the cells, the more expensive the track passing through them. The results of the spatial analysis were compared with the routes previously recreated on the basis of archaeo-historical data.
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The advantages of no-contact methods of acquisition in the field of Cultural Heritage are numerous: from the generation of a photorealistic virtual model to the measurements of details. In this paper the optical acquisition and the 3D... more
The advantages of no-contact methods of acquisition in the field of Cultural Heritage are numerous: from the generation of a photorealistic virtual model to the measurements of details. In this paper the optical acquisition and the 3D laser scanning of a perimortal fracture of a skull, dated between the media and recent Bronze Age, are presented. This study allows, in the bioarchaeological context, to reconstruct the state of health, the living conditions and the causes of death. The instrument used is the OGP SmartScope Flash CNC 300, a multisensor system equipped with a touch probe, a high zoom (30X-600X) optical system and a single coaxial laser beam able to acquire with a resolution of 0.5 µm. The fracture was analized with both laser and optical sensor; some details of bone tissue were aquired with high magnification (33.4X and 88.3X). The Reverse Engineering software Geomagic Studio 12 was used for the processing of the points clouds and the evaluation of quantitative parameters.
A lead medal attributed to Antonio Averlino known as Filarete, with a portrait of Caesar, is preserved in the Gabinetto Numismatico of the Museo Civico Correr of Venice. This unicum presents oxidation coatings on both sides, so it was... more
A lead medal attributed to Antonio Averlino known as Filarete, with a portrait of Caesar, is preserved in the Gabinetto Numismatico of the Museo Civico Correr of Venice. This unicum presents oxidation coatings on both sides, so it was included in a restoration project of the Foundation of the Venetian Civic Museums. Through the acquisition of the object with high resolution scanning it is possible characterize the changes caused by oxidation coating, identify the particular style and mapping at micrometer scale the areas of degradation. For this purpose, two different laser scanning instruments are used in order to compare different resolution and accuracy and to produce a multi resolution model. The medallion was also replicated using rapid prototyping with ZPrinter 450 machine.
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In the Gabinetto Numismatico of the Civico Museo Co rrer of Venice is preserved a lead “all’antica” medal with a portrait of Caesar. Attributed in the past to the “Medallist of the Roman Emperors”, recently it was attributed to Antonio... more
In the Gabinetto Numismatico of the Civico Museo Co rrer of Venice is preserved a lead “all’antica” medal with a portrait of Caesar. Attributed in the past to the “Medallist of the Roman Emperors”, recently it was attributed to Antonio Averlino, kno wn as Filarete, the Renaissance Italian architect a nd sculptor, known above all for having made the bronz e central doors of St. Peter’s Basilica in Rome. The medal is very important because it don’t exist other specimens. Recent showy alterations caused by the lead oxidation appeared in some parts of the two faces and the medal was inserted in a restoration project sponsored by the Fondazione dei Civici Musei Veneziani. For this purpose, an integrated approach has been p erformed, using different laser scanner techniques, in order to produce a 3D high resolution model. Two different instruments were used to compare different resolution and accuracy, from an instrume ntal point of view, and to acquire more information about the showy alterations, from a DTM (Digital Te rrain Model) point of view. The instruments are contact/non-contact measurement systems; the first one is the Faro Cam2 laserScanarm (stripe laser and touch probe), and th e second is OGP SmartScope Flash CNC302, a multisensory system equipped with a through-the-len s (TTL) laser and a micro touch probe. Finally, a 3D model is presented in a standard form at in order to be imported, measured and analyzed using different software environments.
Research Interests: Art and Laser scanner
... is expected for the model such as accuracy required of the digital model, complexity of the description of the digital model for optimal benchmark application, compatibility ... [5] Mays S.: Thearchaeology of human ... [6] Montani C.,... more
... is expected for the model such as accuracy required of the digital model, complexity of the description of the digital model for optimal benchmark application, compatibility ... [5] Mays S.: Thearchaeology of human ... [6] Montani C., Rocchini C., Scopigno R.: Tecnologie 3D scanning. ...
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Información del artículo Caratterizzazione di nummi di V sec. dC tramite rilievo tridimensionale: uno strumento per la ricerca numismatica.
In Cappadocia (central Turkey), routes that were only of a secondary importance during the Roman age acquired a new relevance starting from the end of the 7th century. In this framework, to what extent did the archaeological evidence... more
In Cappadocia (central Turkey), routes that were only of a secondary importance during the Roman age acquired a new relevance starting from the end of the 7th century. In this framework, to what extent did the archaeological evidence match the picture recalled by the written sources? To address this question, the relationship between movement and visibility was considered and view shed analyses were conducted from targeted and strategic spots set along the routes considered. This allowed to better understand the role and the different functions of those axes crossing Cappadocia, and to evaluate the Byzantine/Arab military strategies in central Anatolia.
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This paper focuses on a GIS-based spatial analysis dealing with the Roman-Byzantine routes of central Cappadocia, Turkey. Taking into consideration the various typologies of settlements and their distribution within that region, we... more
This paper focuses on a GIS-based spatial analysis dealing with the
Roman-Byzantine routes of central Cappadocia, Turkey. Taking
into consideration the various typologies of settlements and their
distribution within that region, we approached the issue from an
operational research perspective.
The spatial analysis started from a meta-heuristic algorithm, based
on Genetic Algorithms, implemented to find the ‘best’ path from the site
of Tyana (modern Kemerhisar) to the site of Colonia Acrhelais/Koloneia
(today Aksaray). The algorithm was applied to a cost weighted map,
elaborated overlaying the ASTER Global Digital Elevation Model and
other raster layers with journey ‘friction’ or ‘facilitation’ factors. In this
way, depending on the presence/absence of physical obstacles, or on
the level of visibility ‘from the roads’ or ‘of the roads’, each cell of the
weighted map was defined by a specific value: the higher the values
of the cells, the more expensive the track passing through them. The
results of the spatial analysis were compared with the routes previously
recreated on the basis of archaeo-historical data.
Roman-Byzantine routes of central Cappadocia, Turkey. Taking
into consideration the various typologies of settlements and their
distribution within that region, we approached the issue from an
operational research perspective.
The spatial analysis started from a meta-heuristic algorithm, based
on Genetic Algorithms, implemented to find the ‘best’ path from the site
of Tyana (modern Kemerhisar) to the site of Colonia Acrhelais/Koloneia
(today Aksaray). The algorithm was applied to a cost weighted map,
elaborated overlaying the ASTER Global Digital Elevation Model and
other raster layers with journey ‘friction’ or ‘facilitation’ factors. In this
way, depending on the presence/absence of physical obstacles, or on
the level of visibility ‘from the roads’ or ‘of the roads’, each cell of the
weighted map was defined by a specific value: the higher the values
of the cells, the more expensive the track passing through them. The
results of the spatial analysis were compared with the routes previously
recreated on the basis of archaeo-historical data.
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In Cappadocia (central Turkey), routes that were only of a secondary importance during the Roman age acquired a new relevance starting from the end of the 7th century. In this framework, to what extent did the archaeological evidence... more
In Cappadocia (central Turkey), routes that were only of a secondary importance during the Roman age acquired a new relevance starting from the end of the 7th century. In this framework, to what extent did the archaeological evidence match the picture recalled by the written sources? To address this question, the relationship between movement and visibility was considered and viewshed analyses were conducted from targeted and strategic spots set along the routes considered. This allowed to better understand the role and the different functions of those axes crossing Cappadocia, and to evaluate the Byzantine/Arab military strategies in central Anatolia.
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... 3. EXPORT DATA BENCHMARK ... More and more images were acquired changing the operative modes, as the scanning speed and the angular deflection (both for ... Two files acquired with the Riegl LMS-Z210 laser scanner are presented; using... more
... 3. EXPORT DATA BENCHMARK ... More and more images were acquired changing the operative modes, as the scanning speed and the angular deflection (both for ... Two files acquired with the Riegl LMS-Z210 laser scanner are presented; using the 3D RiSCAN software, the files ...
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Research Interests:
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Laser scanning methodology allows to reconstruct the metric characteristics of objects at different LOD (Level Of Detail) providing spatially dense points clouds. In particular, the terrestrial application carried out in the last years... more
Laser scanning methodology allows to reconstruct the metric characteristics of objects at different LOD (Level Of Detail) providing spatially dense points clouds. In particular, the terrestrial application carried out in the last years have demonstrated the potentialities of the methodology useful in many different sectors. This tecnique has been used also for the "Cavallo ligneo" of the "Palazzo della Ragione" (Padua, Italy) survey providing useful data for the restoration of the wooden horse. Due to the morphologic complexity of the object, some lacunas were created during the points clouds acquisitions: different procedures to filling lacunas were considered and applied providing a complete D model of the wooden statue.
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The aim of this study was to assess, by a digital photogrammetric technique, the relative dimensional changes before and after rapid maxillary expansion (RME). The transverse diameters and volumetric variations of the palate were measured... more
The aim of this study was to assess, by a digital photogrammetric technique, the relative dimensional changes before and after rapid maxillary expansion (RME). The transverse diameters and volumetric variations of the palate were measured by photogrammetry on study casts taken at three different phases of therapy: at the beginning of treatment (T1), on removal of the rapid expander, after expansion and retention for three months (T2), and six months after appliance removal (T3). The sample consisted of 30 children, (age range 7-8 years), all with a crossbite; 15 were angle Class I, six Class II and nine Class III. They were treated with an acrylic splint expander with two turns per day until the maxillary molar palatal cusps were in contact with the mandibular molar buccal cusps. The RME device was used as a passive retainer for three months, after which it was removed. During the following six months, no retention was used and no orthodontic treatment was undertaken. The findings demonstrated a significant relapse (P < 0.001) in the dental transverse diameter in all patients six months after appliance removal, although the palatal volume remained stable.
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The use of volumetric targets for the automatic merging and orientation of laser scanner acquisitions has been experimented. The used procedure is fully automatic. The targets can also be used for the orientation of photogrammetric... more
The use of volumetric targets for the automatic merging and orientation of laser scanner acquisitions has been experimented. The used procedure is fully automatic. The targets can also be used for the orientation of photogrammetric acquisitions, and allow to have a synergic coupling of different kinds of surveying. If a calibration grid is used, the absolute coordinates of the cone vertices are known; for larger objects (architecture), the vertices coordinates can be obtained by a topographic survey. The procedure described in the article, performs the automatic ...
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Padova, 1 aprile 2019 Palazzo Liviano, Sala del Consiglio A Conference on ancient Mediterranean musical customs that we can draw not only from texts and images but from material evidence kept in Italian museums and collections too. In... more
Padova, 1 aprile 2019
Palazzo Liviano, Sala del Consiglio
A Conference on ancient Mediterranean musical customs that we can draw not only from texts and images but from material evidence kept in Italian museums and collections too. In Italy, as well as in most European countries, this material heritage has never been systematically studied from the broader and inclusive perspective of music history as cultural history, nor disseminated. In some cases, this material heritage has not even been identified yet, since many artifacts are kept in museum storerooms, and not displayed. Furthermore, when these objects are put on display, their musical relevance is often not adequately explained.
Palazzo Liviano, Sala del Consiglio
A Conference on ancient Mediterranean musical customs that we can draw not only from texts and images but from material evidence kept in Italian museums and collections too. In Italy, as well as in most European countries, this material heritage has never been systematically studied from the broader and inclusive perspective of music history as cultural history, nor disseminated. In some cases, this material heritage has not even been identified yet, since many artifacts are kept in museum storerooms, and not displayed. Furthermore, when these objects are put on display, their musical relevance is often not adequately explained.
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"Medaglione" è un nome moderno utilizzato per identificare una classe di monete romane imperiali che si distinguono dalle altre coeve per le dimensioni eccezionali, ma anche per la maggior cura con cui sono incise le matrici da cui... more
"Medaglione" è un nome moderno utilizzato per identificare una classe di monete romane imperiali che si distinguono dalle altre coeve per le dimensioni eccezionali, ma anche per la maggior cura con cui sono incise le matrici da cui derivano. Pur potendo essere spesi, i medaglioni avevano la funzione principale di celebrare le glorie e le virtù dell'imperatore e della sua famiglia, entro la ristretta élite sociale che spesso lo stesso imperatore in prima persona intendeva onorare con doni tanto preziosi. Proprio tali caratteristiche da sempre hanno comportato una grande attenzione da parte degli studiosi e dei collezionisti, che soprattutto in Italia nel corso del Rinascimento vi hanno dedicato numerose pubblicazioni e discussioni, tanto da determinare l'impiego del nome italiano anche nel resto d'Europa. Questo volume pubblica per la prima volta nel loro insieme i medaglioni romani imperiali del Museo Correr di Venezia. Si tratta di una piccola collezione che conta però vari esemplari rari e singolari, come quello di Adriano con la raffigurazione del ponte Elio, l'unico originale oggi conosciuto, forse ispiratore dello stesso Raffaello. Lo studio di tali materiali è proposto con un taglio tradizionale, abbinato a un approccio multidisciplinare e interdisciplinare che fa largo uso della rappresentazione tridimensionale, utile tanto ad approfondire l'analisi dei medaglioni quanto a migliorarne la fruibilità grazie all'utilizzo di strumenti digitali.