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Measurement of surface changes in a scaled-down landslide model using high-speed stereo image sequences / Tiantian Feng in Photogrammetric Engineering & Remote Sensing, PERS, vol 82 n° 7 (juillet 2016)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 82 n° 7 (juillet 2016) . - pp 547 - 557 Titre : Measurement of surface changes in a scaled-down landslide model using high-speed stereo image sequences Type de document : Article/Communication Auteurs : Tiantian Feng, Auteur ; Huan Mi, Auteur ; Marco Scaioni, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 547 - 557 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] cartographie d'urgence [Termes IGN] Chine [Termes IGN] détection de changement [Termes IGN] effondrement de terrain [Termes IGN] gestion prévisionnelle [Termes IGN] modèle de simulation [Termes IGN] modèle stéréoscopique [Termes IGN] photogrammétrie métrologique [Termes IGN] séquence d'images [Termes IGN] surveillance géologique [Termes IGN] vitesse Résumé : (Auteur) Construction of scaled-down landslide models is an important means for landslide study. The objective of this study is to develop an innovative non-contact photogrammetric system to meet the challenge for monitoring the fast surface deformation of a laboratory-simulated landslide, which can detect pre-failure events and the final failure, provide sectional and overall surface deformation patterns, and generate speed maps during the rapid slope failure. We proposed an event detector based on altered surface features in the slower SLRC (single-lensreflex camera) image sequence to detect pre-failure events, while a combined analysis tool used the surface velocity fields and deformation areas based on fast HSCS (high-speed stereocamera system) stereo image sequences to reveal fast-changing landslide behavior during the short final failure. The introduced surface change detector uses the percentage of sliding block areas, percentage of changed features, and average speeds. It successfully detected four pre-failure local collapse events and the final slope failure; the extent of surface changes reached its maximum to accumulate energy 1.5 seconds before the failure when the average speed of changed features achieved its peak of 0.8 m/s. The developed system achieved a position accuracy of 3.8 mm and a speed accuracy of 0.11 m/s. The analysis result demonstrated a time period of 66 minutes before the failure which is confirmed by significant signals from both imaging and contact sensors and is important for landslide early warning. A field implementation scheme in western China will be designed and realized in the near future. Numéro de notice : A2016-516 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.82.7.547 En ligne : http://dx.doi.org/10.14358/PERS.82.7.547 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81587 [article]

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Simultaneous registration of gnomonic projections and central perspectives / Luigi Barazzetti in Photogrammetric record, vol 29 n° 147 (September - November 2014)  

Public [article]  inPhotogrammetric record > vol 29 n° 147 (September - November 2014) . - pp 278 - 296 Titre : Simultaneous registration of gnomonic projections and central perspectives Type de document : Article/Communication Auteurs : Luigi Barazzetti, Auteur ; Mattia Previtali, Auteur ; Marco Scaioni, Auteur Année de publication : 2014 Article en page(s) : pp 278 - 296 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] compensation par faisceaux [Termes IGN] image panoramique [Termes IGN] orientation d'image [Termes IGN] photogrammétrie terrestre [Termes IGN] projection gnomonique [Termes IGN] traitement automatique d'images Résumé : (Auteur) An innovative methodology that combines central perspectives and panoramic gnomonic projections into an integrated bundle block adjustment is discussed. The use of both kinds of images generates metric products with a superior level of detail (image resolution) compared with conventional central perspectives alone, whilst achieving the accuracy of the latter. The entire methodology is intended as a low-cost solution to improving the ground sampling distance over that achievable with single exposures by conventional modern terrestrial cameras. Very high-resolution close-range images can be automatically generated and oriented with a rigorous multi-step procedure that integrates both types of images within a unified least squares adjustment. The advantages and disadvantages of the proposed approach are analysed from both theoretical and practical points of view and illustrated through a series of examples. Numéro de notice : A2014-489 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12062 Date de publication en ligne : 18/09/2014 En ligne : https://doi.org/10.1111/phor.12062 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74078 [article]

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II-5 W2 - November 2013 - [actes] ISPRS Workshop Laser Scanning 2013, 11–13 November 2013, Antalya, Turkey (Bulletin de ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences) / Marco Scaioni  

Public [n° ou bulletin]  est un bulletin de ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences / International society for photogrammetry and remote sensing (1980 -) (2012 - )   Titre : II-5 W2 - November 2013 - [actes] ISPRS Workshop Laser Scanning 2013, 11–13 November 2013, Antalya, Turkey Type de document : Périodique Auteurs : Marco Scaioni, Éditeur scientifique ; Roderik Lindenbergh, Éditeur scientifique ; Sander J. Oude Elberink, Éditeur scientifique ; Dieter Schneider, Éditeur scientifique ; Francesco Pirotti, Éditeur scientifique Année de publication : 2013 Conférence : ISPRS 2013, Workshop Laser Scanning 11/11/2013 13/11/2013 Antalya Turquie OA ISPRS Annals Langues : Anglais (eng) Numéro de notice : sans Affiliation des auteurs : non IGN Nature : Numéro de périodique En ligne : http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-7-W2/index.htm [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=26808 [n° ou bulletin]

Contient

• Registration of terrestrial mobile laser data on 2D or 3D geographic database by use of a non-rigid ICP approach / Fabrice Monnier in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5 W2 (November 2013)    
• Facade reconstruction with generalized 2.5D grids / Jérôme Demantké in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5 W2 (November 2013)    
• Feature relevance assessment for the semantic interpretation of 3D point cloud data / Martin Weinmann in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5 W2 (November 2013)    
• Change Detection in 3D Point Clouds Acquired by a Mobile Mapping System / Wen Xiao in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5 W2 (November 2013)    

Change detection and deformation analysis in point clouds: Application to rock face monitoring / Marco Scaioni in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 5 (May 2013)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 79 n° 5 (May 2013) . - pp 441 - 455 Titre : Change detection and deformation analysis in point clouds: Application to rock face monitoring Type de document : Article/Communication Auteurs : Marco Scaioni, Auteur ; Riccardo Roncella, Auteur ; Mario Ivan Alba, Auteur Année de publication : 2013 Article en page(s) : pp 441 - 455 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse comparative [Termes IGN] analyse diachronique [Termes IGN] détection de changement [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] éboulement [Termes IGN] falaise [Termes IGN] filtrage de la végétation [Termes IGN] image RVB [Termes IGN] Italie [Termes IGN] montagne [Termes IGN] Préalpes (Europe) [Termes IGN] semis de points [Termes IGN] télémétrie laser terrestre Résumé : (Auteur) The paper outlines a method to compare two digital surfaces of the same rock face to detect major changes resulting from detached rocks and deformations. A terrestrial laser scanning survey is used for data gathering. After georeferencing, if the cliff has a complex morphology, a 3D segmentation algorithm is applied to split the whole rock surface into more subregions with an almost planar structure. In each subregion the raw point cloud is resampled on a regular grid and multitemporal differences are analyzed. Anomalies in differences, which should be very close to zero if no geometric variations have occurred, are identified with the following purposes: (a) localizing gross changes due to rock detachments, (b) removing global rigid-body displacements, and (c) understanding local cliff deformations. In the case where the rock face is covered by vegetation, this has to be filtered out, e.g., by visual inspection of RGB images co-registered to the point cloud. This paper also describes a procedure to carry out vegetation filtering in automatic way from the analysis of near-infrared images captured by a camera integrated to laser scanner. The application of the full processing pipeline has been tested on a real case study located in the Italian pre-alpine area. Here, after filtering some vegetation, a total rock fall volume of 0.15 m3 was detected on a cliff of about 375 m2 and within a period of six months. Numéro de notice : A2013-282 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.79.5.441 En ligne : https://doi.org/10.14358/PERS.79.5.441 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32420 [article]

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Review of geometric and radiometric analyses of paintings / Fabio Remondino in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)  

Public [article]  inPhotogrammetric record > vol 26 n° 136 (December 2011 - February 2012) . - pp 439 - 461 Titre : Review of geometric and radiometric analyses of paintings Type de document : Article/Communication Auteurs : Fabio Remondino, Auteur ; Luigi Barazzetti, Auteur ; Marco Scaioni, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 439 - 461 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] capteur actif [Termes IGN] déformation d'image [Termes IGN] image multibande [Termes IGN] patrimoine culturel [Termes IGN] patrimoine mobilier [Termes IGN] peinture [Termes IGN] photogrammétrie terrestre [Termes IGN] qualité radiométrique (image) [Termes IGN] restitution [Termes IGN] surveillance [Termes IGN] télémétrie laser terrestre [Termes IGN] valeur radiométrique Résumé : (Auteur) This paper presents an overview of a number of diagnostic campaigns carried out to assess the conservation state of paintings. The specific characteristics required in cultural heritage applications have been investigated and are reported, where two main fields are considered: radiometric analyses using multispectral images and 3D surveying for geometric deformation analysis by means of photogrammetry and laser scanning. The activities described were accomplished in interdisciplinary teams, composed of photogrammetrists, art-historians, restorers and experts of non-destructive diagnostic techniques. Numéro de notice : A2011-496 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00664.x En ligne : http://dx.doi.org/10.1111/j.1477-9730.2011.00664.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31390 [article]

Orientation and 3D modelling from markerless terrestrial images : combining accuracy with automation / Luigi Barazzetti in Photogrammetric record, vol 25 n° 132 (December 2010 - February 2011)  

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Crack measurement : development, testing and applications of an automatic image-based algorithm / L. Barazetti in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 3 (May - June 2009)  

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Generation of a spatial information system for architecture with laserscanning data / Luigi Fregonese (2009)  

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