Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/16215
DC Field | Value | Language |
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dc.date.accessioned | 2023-02-21T13:32:34Z | - |
dc.date.available | 2023-02-21T13:32:34Z | - |
dc.date.issued | 2022-03-14 | - |
dc.identifier.uri | http://hdl.handle.net/2122/16215 | - |
dc.description.abstract | Structure from Motion (SfM) photogrammetry is based on the use of algorithms allowing the automatically identification of a large amount of homologous points (or pixels) between images overlapping areas. The coordinates of the homologous points (provided in different reference systems for each acquisition), allow the images alignment meaning the internal and external camera calibration. The number and the distribution of homologous points drives the entire procedure of photogrammetric restitution. In some cases, due to a fatal combination of acquisition strategy, digital cameras and software, anomalies could occur causing systematic effects in the point clouds representing the observed surfaces. This paper shows the results obtained from SfM surveys carried out as part of a project for the study of deformations due to the phenomenon of liquefaction by comparing multi-temporal models. This is the only case we have observed in years of SfM survey experience in which there are systematic effects preventing the direct use of the point clouds obtained using Photoscan (versions 1.1.2 and 1.7.0). Some approaches aimed at mitigating the distortions by balancing the distribution of homologous points and inhibiting the adjustment of internal camera calibration are used to improve results. A reference Terrestrial Laser Scanning (TLS) survey allowed the evaluation unexpected problems. Finally, the images data set processed by means of Metashape (1.5.0), a new improved version of Photoscan, provide good results free from systematism proving the greater efficiency of new algorithms for homologous points selection optimization. Since Photoscan is a very widespread product and also used within the INGV, it is believed that this experience can be useful to many operators involved in monitoring and studying surface deformations. | en_US |
dc.language.iso | Italian | en_US |
dc.publisher.name | INGV | en_US |
dc.relation.ispartof | Quaderni di Geofisica | en_US |
dc.relation.ispartofseries | 177 / (2022) | en_US |
dc.rights | CC0 1.0 Universal | * |
dc.rights.uri | http://creativecommons.org/publicdomain/zero/1.0/ | * |
dc.title | Studio di possibili effetti sistematici nelle nuvole di punti SfM da APR: confronti con TLS, distorsioni e metodi di mitigazione | en_US |
dc.title.alternative | Evaluation of possible systematic effects in SfM UAV based point clouds: TLS and surface variations for error mitigation methods | en_US |
dc.type | article | en |
dc.description.status | Published | en_US |
dc.type.QualityControl | Peer-reviewed | en_US |
dc.description.pagenumber | 1-26 | en_US |
dc.identifier.doi | 10.13127/qdg/177 | en_US |
dc.description.obiettivoSpecifico | 5T. Sismologia, geofisica e geologia per l'ingegneria sismica | en_US |
dc.description.journalType | JCR Journal | en_US |
dc.relation.issn | 1590-2595 | en_US |
dc.contributor.author | Pesci, Arianna | - |
dc.contributor.author | Teza, Giordano | - |
dc.contributor.author | Loddo, Fabiana | - |
dc.contributor.author | Fabris, Massimo | - |
dc.contributor.author | Monego, Michele | - |
dc.contributor.author | Amoroso, Sara | - |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | en_US |
dc.contributor.department | Università degli Studi di Bologna DIFA | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | en_US |
dc.contributor.department | Università di Padova Dipartimento Geoscienze | en_US |
dc.contributor.department | Università di Padova Dipartimento ICEA | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en_US |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | it | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Università di Padova Dipartimento ICEA | - |
crisitem.author.orcid | 0000-0003-1863-3132 | - |
crisitem.author.orcid | 0000-0002-6902-5033 | - |
crisitem.author.orcid | 0000-0002-1153-1021 | - |
crisitem.author.orcid | 0000-0002-7790-9656 | - |
crisitem.author.orcid | 0000-0001-5835-079X | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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QdG177_2022 (effetti sistematici SfM).pdf | 2.22 MB | Adobe PDF | View/Open |
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