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Occupancy modelling for moving object detection from Lidar point clouds: A comparative study / Wen Xiao in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol IV-2/W4 (September 2017)  

Public [article]  inISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences > vol IV-2/W4 (September 2017) . - pp 171 - 178 Titre : Occupancy modelling for moving object detection from Lidar point clouds: A comparative study Type de document : Article/Communication Auteurs : Wen Xiao, Auteur ; Bruno Vallet , Auteur ; Y. Xiao, Auteur ; Jon Mills, Auteur ; Nicolas Paparoditis , Auteur Année de publication : 2017 Article en page(s) : pp 171 - 178 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] détection d'objet [Termes IGN] détection de changement [Termes IGN] données lidar [Termes IGN] grille [Termes IGN] objet mobile [Termes IGN] semis de points [Termes IGN] théorie de Dempster-Shafer Résumé : (auteur) Lidar technology has been widely used in both robotics and geomatics for environment perception and mapping. Moving object detection is important in both fields as it is a fundamental step for collision avoidance, static background extraction, moving pattern analysis, etc. A simple method involves checking directly the distance between nearest points from the compared datasets. However, large distances may be obtained when two datasets have different coverages. The use of occupancy grids is a popular approach to overcome this problem. There are two common theories employed to model occupancy and to interpret the measurements, DempsterShafer theory and probability. This paper presents a comparative study of these two theories for occupancy modelling with the aim of moving object detection from lidar point clouds. Occupancy is modelled using both approaches and their implementations are explained and compared in details. Two lidar datasets are tested to illustrate the moving object detection results Numéro de notice : A2017-913 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/isprs-annals-IV-2-W4-171-2017 En ligne : https://doi.org/10.5194/isprs-annals-IV-2-W4-171-2017 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102874 [article]

Information from imagery: ISPRS scientific vision and research agenda / Jun Chen in ISPRS Journal of photogrammetry and remote sensing, vol 115 (May 2016)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 115 (May 2016) . - pp 3 – 21 Titre : Information from imagery: ISPRS scientific vision and research agenda Type de document : Article/Communication Auteurs : Jun Chen, Auteur ; Ian J. Dowman, Auteur ; Songnian Li, Auteur ; Zhilin li, Auteur ; Marguerite Madden, Auteur ; Jon Mills, Auteur ; Nicolas Paparoditis , Auteur ; Franz Rottensteiner, Auteur ; Monika Sester, Auteur ; Charles K. Toth, Auteur ; John C. Trinder, Auteur ; Christian Heipke, Auteur Année de publication : 2016 Article en page(s) : pp 3 – 21 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] image à haute résolution [Termes IGN] information géographique [Termes IGN] informatique ubiquitaire [Termes IGN] recherche et développement [Termes IGN] technologies de l'information et de la communication [Termes IGN] télédétection spatiale Mots-clés libres : Research agenda  Photogrammetry  Remote sensing  Spatial information science Résumé : (auteur) With the increased availability of very high-resolution satellite imagery, terrain based imaging and participatory sensing, inexpensive platforms, and advanced information and communication technologies, the application of imagery is now ubiquitous, playing an important role in many aspects of life and work today. As a leading organisation in this field, the International Society for Photogrammetry and Remote Sensing (ISPRS) has been devoted to effectively and efficiently obtaining and utilising information from imagery since its foundation in the year 1910. This paper examines the significant challenges currently facing ISPRS and its communities, such as providing high-quality information, enabling advanced geospatial computing, and supporting collaborative problem solving. The state-of-the-art in ISPRS related research and development is reviewed and the trends and topics for future work are identified. By providing an overarching scientific vision and research agenda, we hope to call on and mobilise all ISPRS scientists, practitioners and other stakeholders to continue improving our understanding and capacity on information from imagery and to deliver advanced geospatial knowledge that enables humankind to better deal with the challenges ahead, posed for example by global change, ubiquitous sensing, and a demand for real-time information generation. Numéro de notice : A2016-541 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.09.008 Date de publication en ligne : 09/10/2015 En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2015.09.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81686 [article]

Modelling vertical error in LiDAR-derived digital elevation models / F. Aguilar in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 1 (January - February 2010) . - pp 103 - 110 Titre : Modelling vertical error in LiDAR-derived digital elevation models Type de document : Article/Communication Auteurs : F. Aguilar, Auteur ; Jon Mills, Auteur ; J. Delgado, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 103 - 110 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] interpolation inversement proportionnelle à la distance [Termes IGN] lasergrammétrie [Termes IGN] modèle d'erreur [Termes IGN] modèle numérique de surface Résumé : (Auteur) A hybrid theoretical–empirical model has been developed for modelling the error in LiDAR-derived digital elevation models (DEMs) of non-open terrain. The theoretical component seeks to model the propagation of the sample data error (SDE), i.e. the error from light detection and ranging (LiDAR) data capture of ground sampled points in open terrain, towards interpolated points. The interpolation methods used for infilling gaps may produce a non-negligible error that is referred to as gridding error. In this case, interpolation is performed using an inverse distance weighting (IDW) method with the local support of the five closest neighbours, although it would be possible to utilize other interpolation methods. The empirical component refers to what is known as “information loss”. This is the error purely due to modelling the continuous terrain surface from only a discrete number of points plus the error arising from the interpolation process. The SDE must be previously calculated from a suitable number of check points located in open terrain and assumes that the LiDAR point density was sufficiently high to neglect the gridding error. For model calibration, data for 29 study sites, 200*200 m in size, belonging to different areas around Almeria province, south-east Spain, were acquired by means of stereo photogrammetric methods. The developed methodology was validated against two different LiDAR datasets. The first dataset used was an Ordnance Survey (OS) LiDAR survey carried out over a region of Bristol in the UK. The second dataset was an area located at Gador mountain range, south of Almería province, Spain. Both terrain slope and sampling density were incorporated in the empirical component through the calibration phase, resulting in a very good agreement between predicted and observed data (R2=0.9856;p Numéro de notice : A2010-233 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.09.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.09.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30427 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2010011	SL	Revue	Centre de documentation	Revues en salle	Disponible

Spatial decision support in a post-disaster environment: A community-focused approach / Jon Mills in Cartographica, vol 44 n° 1 (March 2009)  

Public [article]  inCartographica > vol 44 n° 1 (March 2009) . - pp 17 - 31 Titre : Spatial decision support in a post-disaster environment: A community-focused approach Type de document : Article/Communication Auteurs : Jon Mills, Auteur Année de publication : 2009 Article en page(s) : pp 17 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] analyse spatiale [Termes IGN] approche participative [Termes IGN] catastrophe naturelle [Termes IGN] environnement [Termes IGN] outil d'aide à la décision [Termes IGN] participation du public [Termes IGN] SIG participatif [Termes IGN] système d'information géographique Résumé : (Auteur) Disasters, by definition, are low-frequency, high-impact events. Because of the infrequent occurrence and dynamic conditions of such events, researchers do not often have the ability to thoroughly study their effects. However, as population distributions and densities place more people at risk of experiencing a disaster, more complete investigations of these events are needed. Recovery, the post-disaster phase of returning to “normalcy,” is one understudied aspect. Gaining a better understanding of this process has important implications for the well-being of disaster-affected people and equitable redevelopment of affected places. This article focuses on one aspect of recovery: spatial decision support for communities. Though the literature on community mapping discusses a variety of cases in which geographic information systems (GIS) are used as a tool to engage the public on a variety of issues, it has yet to address concerns in a post-disaster environment. Furthermore, existing research in geographic information science (GISc) for disasters has only limited dealings with community-focused mapping. The result is that community information needs in a post-disaster environment have not been recognized. Based on existing literature and empirical observations from post-Katrina Louisiana, this article addresses the spatial component of these information needs and how GISc can provide decision-support tools in a post-disaster environment. Copyright University of Toronto Press Numéro de notice : A2009-094 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.3138/carto.44.1.17 En ligne : https://doi.org/10.3138/carto.44.1.17 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29724 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-09011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Videogrammetric monitoring of as-built membrane roof structures / S.Y. Lin in Photogrammetric record, vol 23 n° 122 (June - August 2008)  

Public [article]  inPhotogrammetric record > vol 23 n° 122 (June - August 2008) . - pp 128 - 147 Titre : Videogrammetric monitoring of as-built membrane roof structures Type de document : Article/Communication Auteurs : S.Y. Lin, Auteur ; Jon Mills, Auteur ; P.D. Gosling, Auteur Année de publication : 2008 Article en page(s) : pp 128 - 147 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] balise [Termes IGN] déformation de surface [Termes IGN] données localisées 3D [Termes IGN] modèle numérique de surface [Termes IGN] surveillance d'ouvrage [Termes IGN] toit [Termes IGN] Vidéogrammétrie Résumé : (Auteur) A monitoring system that uses applied geomatics techniques, including videogrammetry and terrestrial laser scanning, has been developed in order to investigate the dynamic behaviour of as-built membrane roof structures. To accommodate the problems involved in measuring such roof structures, examples of which include uniform surface texture and unreachable height, the system adopts a non-contact targeting methodology to substitute for traditional control techniques. In-house software was developed for processing the acquired video imagery in order to produce a sequential surface model of the membrane. This paper firstly reports on experiments conducted to demonstrate that the monitoring system was capable of measuring representative test structures with a precision of better than +1 mm. To prove the feasibility and transferability of the system, videogrammetric monitoring campaigns were subsequently performed at a real-world test site where two different types of membrane structure were observed. The sequential 3D surface models that were generated allowed the displacement of the membrane surfaces to be investigated over a period, during which the range of the movement reached over 20 mm. The information acquired from the system is proving to be of great value to structural engineers involved in research and development of such membrane structures. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2008-294 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2008.00477.x En ligne : https://doi.org/10.1111/j.1477-9730.2008.00477.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29287 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-08021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Geometric validation of a ground-based mobile laser scanning system / D. Barber in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)  

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A robust surface matching technique for integrated monitoring of coastal geohazards / P. Miller in Marine geodesy, vol 30 n° 1-2 (March - June 2007)  

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