Use of Non-professional UAV Video Sequences for the 3D Modelling of Archaeological Sites by SfM Techniques

Bitelli, Gabriele; Artini, Federico; Girelli, Valentina Alena; Lambertini, Alessandro; Mandanici, Emanuele

doi:10.1007/978-3-030-62800-0_22

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…Indeed, it was possible to find some videos online that are accessible to the general public, from which a number of frames were extracted, and a three-dimensional model was produced using expeditious SfM methods. Unfortunately, images acquired from non-professional UAV flights only allows for the creation of an approximate and incomplete model [40,41], as there is in fact no way of georeferencing and properly scaling the obtained point cloud. Moreover, having enough crowdsourced data to have a sufficiently complete three-dimensional model is not obvious in general [42], and that was confirmed in the analyzed case.…”

Section: Discussionmentioning

confidence: 99%

A Laboratory for the Integration of Geomatic and Geomechanical Data: The Rock Pinnacle “Campanile di Val Montanaia”

Tavasci,

Lambertini,

Donati

et al. 2023

Remote Sensing

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This work describes a procedure for building a high-quality 3D model of a rocky pinnacle in the Dolomites, Italy, using Structure from Motion (SfM) techniques. The pinnacle, known as “Campanile di Val Montanaia”, is challenging to survey due to its high elevation and sub-vertical cliffs. The construction of the 3D model is the first step in a multi-disciplinary approach to characterize the rock mass and understand its behavior and evolution. This paper discusses the surveying operations, which involved climbing the pinnacle to collect Ground Control Points (GCPs) and using a UAV to capture aerial imagery. The photographs were processed using SfM software to generate point clouds, mesh, and texture, which were then used for rock mass discontinuity mapping. The study compares models of different qualities and point densities to determine the optimal trade-off between processing time and accuracy in terms of discontinuity mapping. The results show that higher quality models allow for more detailed mapping of discontinuities, with some drawbacks due to noise in the case of the densest solution (e.g., increase in frequency of outliers across the point cloud). These pros and cons are also discussed in relation to the computational cost necessary to build the models. The study also examines the limitations and challenges of performing discontinuity mapping in the different models, including subjectivity in interpretation. A further element of interest is the publication of a high-quality 3D georeferenced model of the “Campanile di Val Montanaia” to be used for several potential further applications, such as stability analyses and numerical modeling.

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Section: Discussionmentioning

confidence: 99%

A Laboratory for the Integration of Geomatic and Geomechanical Data: The Rock Pinnacle “Campanile di Val Montanaia”

Tavasci,

Lambertini,

Donati

et al. 2023

Remote Sensing

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“…A similar situation is visible in the digital reconstruction of Temple of Bel (Wahbeh et al, 2016) where, in addition to the package of crowdsourced data, professional panoramic images were included in the processing. The Cahuachi / Tiwanaku project (Bitelli et al, 2020), other than crowdsourced video data, had the best condition for this objective because it used the point cloud from the laser scan as a base. In Plaka bridge case (Stathopoulou et al, 2015), there was no professional data included in the processing.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, (Bitelli et al, 2020) applied and compared different methods of image-based digital reconstruction in the field of archeology. In order to evaluate quality of obtained data, in (Somogyi et al, 2016)open access GEO tagged images from tourist sites in Budapest were processed to a 3d Model and compared with laser scanner and DSLR data.…”

Section: Crowd Sourcing In Documentation Of Cultural Heritagementioning

confidence: 99%

“…Like the Temple of Bel, this is a structure that was completely destroyed, but in this case, crowdsourced images from a large number of different sources represent the only existing data for a possible reconstruction. Secondary data sources were also included in the processing of the digital reconstruction of the two archaeological sites Cahuachi / Tiwanaku in Peru and Bolivia (Bitelli et al, 2020). The Team tested and assessed the process of extracting and selecting images from 4k amateur videos of archeological sites in Peru and Bolivia.…”

Section: Parameter Matrixmentioning

confidence: 99%

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Secondary Data Collection and Heritage Documentation - Case Study of a Remote Documentation of Travnik’s Varoška Mosque

Jäger-Klein¹,

Kodzoman²,

Stampfer³

2023

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. After two disastrous fires in Travnik in 1903, the Austro-Hungarian administration designed a new and secure mosque building model typology following a distinctive style of Habsburg-Bosnia. In order to understand the interventions which were carried out in that time, the research team examined the limited plan documentation from the 1990s. and collected the basic measurements by working on-site. Because of extended requirements, and new target areas being developed later in the project, more data for further research was needed. This paper will examine the possibilities of supplementing the existing materials collected on site by including new secondary sources into the processing. It will discuss the extent of combining data from different sources collected by means of crowdsourcing to conduct photogrammetric models and improve the quality of its result. Also, it will show how this material can refine already existing data and contribute to the precise documentation of the built heritage of Travnik, in particular to the 3D plan set of Varoška Mosque.

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“…The three-dimensional survey of the basaltic receptacle was conducted in 2014 by DICAM Department, University of Bologna, contextually with different geomatic and topographic surveys carried out at Tiwanaku archaeological site (Bitelli et al, 2020).…”

Section: D Scanning: Data Acquisition and Post-processing Operationsmentioning

confidence: 99%

3d Survey and Data Processing of Bolivian Archaeology: The Ritual Receptacle From Tiwanaku

Forte

Orefici

Bitelli

2023

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The archaeological site of Tiwanaku is among the most important examples of Bolivian archaeology and UNESCO World Heritage Site since 2000. This works reports a geomatic-based surveying and modelling methodology applied to a ritual receptacle excavated from the semi-subterranean temple in the archaeological complex. A high-resolution 3D survey was conducted through structured-light projection scanning and post-processing operations were carried out to emphasize surface details. Most of the operations were conducted in open-source software, with the aim to establish a quick and repeatable methodology to be applied to similar case studies. The final outputs, consisting of geometry projections (unrolled meshes), digitally enhanced surfaces and vector graphics can support the work of archaeologists in interpreting the iconography depicted on the receptacle and to conduct further studies to shed light about culture and religion of the civilization that inhabited Tiwanaku.

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Use of Non-professional UAV Video Sequences for the 3D Modelling of Archaeological Sites by SfM Techniques

Cited by 3 publications

References 13 publications

A Laboratory for the Integration of Geomatic and Geomechanical Data: The Rock Pinnacle “Campanile di Val Montanaia”

A Laboratory for the Integration of Geomatic and Geomechanical Data: The Rock Pinnacle “Campanile di Val Montanaia”

Secondary Data Collection and Heritage Documentation - Case Study of a Remote Documentation of Travnik’s Varoška Mosque

3d Survey and Data Processing of Bolivian Archaeology: The Ritual Receptacle From Tiwanaku

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