Structure from motion technology for historic building information modeling of Toron fortress (Lebanon)

Doumit, Jean A.

doi:10.35595/2414-9179-2019-2-25-288-296

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…In recent years there has been a growing interest in UAVs from the scientific community, as well as geomatics professionals and software developers, which has led to their use in increasing applications related to architecture and engineering [3,4]. In fact, UAVs were first used for military applications [5] and then for civilian purposes [6] such as precision agriculture [7,8], forestry studies [9,10], fire monitoring [11,12], cultural heritage and archaeology [13][14][15], traffic monitoring [16,17], environmental surveying [18,19], and 3D reconstruction [20][21][22]. UAV photogrammetry is gaining ground in the gap between traditional surveying methods and photogrammetric flights performed with conventional aircraft.…”

Section: Introductionmentioning

confidence: 99%

Use of UAV-Photogrammetry for Quasi-Vertical Wall Surveying

2020

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In this study, an analysis of the capabilities of unmanned aerial vehicle (UAV) photogrammetry to obtain point clouds from areas with a near-vertical inclination was carried out. For this purpose, 18 different combinations were proposed, varying the number of ground control points (GCPs), the adequacy (or not) of the distribution of GCPs, and the orientation of the photographs (nadir and oblique). The results have shown that under certain conditions, the accuracy achieved was similar to those obtained by a terrestrial laser scanner (TLS). For this reason, it is necessary to increase the number of GCPs as much as possible in order to cover a whole study area. In the event that this is not possible, the inclusion of oblique photography ostensibly improves results; therefore, it is always advisable since they also improve the geometric descriptions of break lines or sudden changes in slope. In this sense, UAVs seem to be a more economic substitute compared to TLS for vertical wall surveying.

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Section: Introductionmentioning

confidence: 99%

Use of UAV-Photogrammetry for Quasi-Vertical Wall Surveying

2020

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“…In the last years, Geospatial Technologies became a usual tool for heritage managers, conservators, restorers, architects, archaeologists, painters, and all other categories of experts involved in cultural heritage activities, which can be found in numerous national and international case studies (e.g. El-Hakim et al 2004, Kersten 2006, Kersten et al, 2012Fassi et al, 2013;Micoli et al 2013, Dostal 2014, Erenoglu et al 2017, Maietti, F. et al, 2018, Doumit 2019, Galantucci & Fatiguso 2019.…”

Section: Introductionmentioning

confidence: 99%

Use of Photogrammetry and Terrestrial Laser Scanning to Measure Superficial Weathering Damage on the Façade of Hanfelden Castle, Austria

Sulzer,

Gspurning,

Kaufmann

et al. 2023

JMC

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Hanfelden Castle is one of the few Renaissance castles in Austria, which were subsequently hardly redesigned and changed since the tower building from the 14th century, and the extension in the 16th century to the today's appearance. This includes the façade with plaster layers from the 16th to the 18th century on the south and west side. Under these conditions, the concept for future scientific research of the object should essentially cover two needs: On the one hand, a collection of 3D basic data as complete as possible should be created for further work with the help of geospatial-technological methods, and on the other hand, methodological-technical expertise should also be built up (no substantial investigations have been undertaken in this direction). Additionally, and with regard to the determination of mostly conservation measures- the façade should be preserved - it has been important to check the façade made of plaster, natural stone or brick for the extent of superficial damage - such as weathering, flaking, bulging or bending. Therefore, non-contact 3D measuring systems are compared and applied as an alternative to visual inspection using standard cherry pickers or scaffolding. These so-called geospatial technologies applied in this study include methodological aspects of terrestrial photogrammetry, UAV assisted photogrammetry, and terrestrial laser scanning (TLS). This study used historical data/recordings and photogrammetric results from 1986 as well as newer techniques from the structure from motion (SfM) method (2019, 2022) and terrestrial laser scanning (2019, 2022). The different data recording methods and different result data in a multi-temporal and multi-sensoral approach, comparable for the changes to the facade, were a challenge for the study. Despite the different methodological approaches of the technologies used, the overarching goals of the study were, on the one hand, to detect and map the damage to the facade that has become increasingly apparent over the years. On the other hand, it has been shown that the applied 3D methods used (individually or in combination) represent a time-saving and cost-effective alternative to visual examinations using lifting platforms. The data sets obtained in the campaigns described should be homogenized and summarized in the sense of a historical BIM and serve as a basis for further work on the object. The focus was on multi- and interdisciplinarity as well as on taking into account the needs of science to science and science to public dissemination.

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“…Photogrammetry is more developed in architecture [7,8,9] and cultural heritage collections [10,11,12,13,14]. In the literature, there are no clear methodologies for surveying techniques, processing algorithms and recommendations for storage and modification of models, which will be used for advertising applications.…”

Section: Introductionmentioning

confidence: 99%

Small Object Surveying Techniques in the Engineering Stages of Design and 3D Reconstruction

Glumova

2021

Proceedings of the 31th International Conference on Computer Graphics and Vision. Volume 2

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The paper is devoted to The decision of actual problem of development of methodology of photogrammetric survey of the small-sized objects with the purpose of receiving the correct data on them for creation of photorealistic 3D-models without use of the specialized equipment. Structure-from-motion methods applications of small-size objects are considered in the paper. Small-sized objects are justified by the narrow application of 3D models obtained by photogrammetry in marketing. A distinctive feature of the study is the use of images taken by mobile phone cameras as input data for the 3D-reconstruction. The main factors influencing the accuracy of object reconstruction are considered. An analysis of the determination of distortion in mobile phone camera images is carried out. The geometric parameters of different mobile phone cameras are considered in order to determine the deviations in reconstruction accuracy. General recommendations on creation of 3D-models for source data from mobile phone cameras are given. The work has been carried out using the central axis method. And methodical guidelines for obtaining input data for photogrammetry for different object sizes are also given. Quantitative indicators for image series are derived experimentally in order to reduce the time it takes to shoot

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Structure from motion technology for historic building information modeling of Toron fortress (Lebanon)

Cited by 4 publications

References 4 publications

Use of UAV-Photogrammetry for Quasi-Vertical Wall Surveying

Use of UAV-Photogrammetry for Quasi-Vertical Wall Surveying

Use of Photogrammetry and Terrestrial Laser Scanning to Measure Superficial Weathering Damage on the Façade of Hanfelden Castle, Austria

Small Object Surveying Techniques in the Engineering Stages of Design and 3D Reconstruction

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