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Out-of-core GPU-based change detection in massive 3D point clouds / Rico Richter in Transactions in GIS, vol 17 n° 5 (October 2013)
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Titre : Out-of-core GPU-based change detection in massive 3D point clouds Type de document : Article/Communication Auteurs : Rico Richter, Auteur ; Jan Eric Kiprianidis, Auteur ; Jürgen Döllner, Auteur Année de publication : 2013 Article en page(s) : pp 724 - 741 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] attribut
[Termes IGN] détection de changement
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] processeur graphique
[Termes IGN] semis de points
[Termes IGN] structure de données localisées
[Termes IGN] visualisation 3D
[Termes IGN] visualisation simultanéeRésumé : (Auteur) If sites, cities, and landscapes are captured at different points in time using technology such as LiDAR, large collections of 3D point clouds result. Their efficient storage, processing, analysis, and presentation constitute a challenging task because of limited computation, memory, and time resources. In this work, we present an approach to detect changes in massive 3D point clouds based on an out-of-core spatial data structure that is designed to store data acquired at different points in time and to efficiently attribute 3D points with distance information. Based on this data structure, we present and evaluate different processing schemes optimized for performing the calculation on the CPU and GPU. In addition, we present a point-based rendering technique adapted for attributed 3D point clouds, to enable effective out-of-core real-time visualization of the computation results. Our approach enables conclusions to be drawn about temporal changes in large highly accurate 3D geodata sets of a captured area at reasonable preprocessing and rendering times. We evaluate our approach with two data sets from different points in time for the urban area of a city, describe its characteristics, and report on applications. Numéro de notice : A2013-579 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01362.x Date de publication en ligne : 05/12/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01362.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32715
in Transactions in GIS > vol 17 n° 5 (October 2013) . - pp 724 - 741[article]Urban accessibility diagnosis from mobile laser scanning data / Andrès Serna in ISPRS Journal of photogrammetry and remote sensing, vol 84 (October 2013)
[article]
Titre : Urban accessibility diagnosis from mobile laser scanning data Type de document : Article/Communication Auteurs : Andrès Serna, Auteur ; Beatriz Marcotegui, Auteur Année de publication : 2013 Article en page(s) : pp 23 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] accessibilité
[Termes IGN] calcul d'itinéraire
[Termes IGN] courbe de Bézier
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] milieu urbain
[Termes IGN] segmentation
[Termes IGN] semis de pointsRésumé : (Auteur) In this paper, we present an approach for automatic analysis of urban accessibility using 3D point clouds. Our approach is based on range images and it consists in two main steps: urban objects segmentation and curbs detection. Both of them are required for accessibility diagnosis and itinerary planning. Our method automatically segments facades and urban objects using two hypotheses: facades are the highest vertical structures in the scene and objects are bumps on the ground on the range image. The segmentation result is used to build an urban obstacle map. After that, the gradient is computed on the ground range image. Curb candidates are selected using height and geodesic features. Then, nearby curbs are reconnected using Bézier curves. Finally, accessibility is defined based on geometrical features and accessibility standards. Our methodology is tested on two MLS databases from Paris (France) and Enschede (The Netherlands). Our experiments show that our method has good detection rates, is fast and presents few false alarms. Our method outperforms other works reported in the literature on the same databases. Numéro de notice : A2013-514 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.07.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.07.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32651
in ISPRS Journal of photogrammetry and remote sensing > vol 84 (October 2013) . - pp 23 - 32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2013101 RAB Revue Centre de documentation En réserve L003 Disponible Urbanisme et démocratie : représenter pour être compris / Fouad Awada in Cahiers de l'Institut d'aménagement et d'urbanisme de la région Île-de-France, n° 166 (octobre 2013)
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Titre : Urbanisme et démocratie : représenter pour être compris Type de document : Article/Communication Auteurs : Fouad Awada, Auteur Année de publication : 2013 Article en page(s) : pp 9 - 12 Langues : Français (fre) Descripteur : [Termes IGN] communication cartographique
[Termes IGN] données localisées 3D
[Termes IGN] participation du public
[Termes IGN] représentation cartographique
[Termes IGN] urbanisme
[Termes IGN] visualisation cartographique
[Vedettes matières IGN] CartologieRésumé : (Auteur) L'aspiration du citoyen à être davantage associé aux décisions modifie le positionnement relatif entre lui, le politique et l'urbaniste, dans le débat public en matière d'urbanisme. L'utilisation d'un langage commun est indispensable pour un dialogue constructif. L'imagerie 3D, l'infographie et la simplification des cartes peuvent y répondre. Mais cet effort de communication ne doit pas conduire à appauvrir le corpus conceptuel de cette discipline. Numéro de notice : A2013-658 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32794
in Cahiers de l'Institut d'aménagement et d'urbanisme de la région Île-de-France > n° 166 (octobre 2013) . - pp 9 - 12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 36934-01 49.20 Revue Centre de documentation Aménagement - Urbanisme Disponible Using virtual reality and percolation theory to visualize fluid flow in porous media / Carlos Magno De Lima in Geoinformatica, vol 17 n° 4 (October 2013)
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Titre : Using virtual reality and percolation theory to visualize fluid flow in porous media Type de document : Article/Communication Auteurs : Carlos Magno De Lima, Auteur ; Luis M. G. Gonçalves, Auteur ; Cristiana Bentes, Auteur ; Ricardo Farias, Auteur Année de publication : 2013 Article en page(s) : pp 521 - 541 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] analyse visuelle
[Termes IGN] données localisées 3D
[Termes IGN] dynamique des fluides
[Termes IGN] flux de données
[Termes IGN] modèle de simulation
[Termes IGN] prospection pétrolière
[Termes IGN] réalité virtuelle
[Termes IGN] visualisation 3DRésumé : (Auteur) The study of the fluid flow process through porous media can bring valuable contributions in areas like oil exploration and environmental research. In this work, we propose an interactive tool, named VRFluid, that allows visual interpretation of the three-dimensional data generated by the simulation of the fluid flow the porous media. VRFluid comprises a virtual reality engine that provides stereo visualization of the three-dimensional data, and a simulation engine based on a dynamic percolation method to model the fluid flow. VRFluid is composed of two independent main threads, the percolation simulator and the rendering server, that can operate in parallel as a pipeline. We tested our tool on a region of a mature field database, supervised by geophysicists, and obtained images of the interior of the percolation data, providing important results for the interpretation and cluster formation process. Numéro de notice : A2013-508 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-012-0168-5 Date de publication en ligne : 23/10/2012 En ligne : https://doi.org/10.1007/s10707-012-0168-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32646
in Geoinformatica > vol 17 n° 4 (October 2013) . - pp 521 - 541[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2013041 RAB Revue Centre de documentation En réserve L003 Disponible Automatic extraction of building roofs using LIDAR data and multispectral imagery / Mohammad Awrangjeb in ISPRS Journal of photogrammetry and remote sensing, vol 83 (September 2013)
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Titre : Automatic extraction of building roofs using LIDAR data and multispectral imagery Type de document : Article/Communication Auteurs : Mohammad Awrangjeb, Auteur ; Chunsun Zhang, Auteur ; Clive Simpson Fraser, Auteur Année de publication : 2013 Article en page(s) : pp 1 - 18 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] classification dirigée
[Termes IGN] détection de contours
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] image multibande
[Termes IGN] modèle numérique de terrain
[Termes IGN] toitRésumé : (Auteur) Automatic 3D extraction of building roofs from remotely sensed data is important for many applications including city modelling. This paper proposes a new method for automatic 3D roof extraction through an effective integration of LIDAR (Light Detection And Ranging) data and multispectral orthoimagery. Using the ground height from a DEM (Digital Elevation Model), the raw LIDAR points are separated into two groups. The first group contains the ground points that are exploited to constitute a ‘ground mask’. The second group contains the non-ground points which are segmented using an innovative image line guided segmentation technique to extract the roof planes. The image lines are extracted from the grey-scale version of the orthoimage and then classified into several classes such as ‘ground’, ‘tree’, ‘roof edge’ and ‘roof ridge’ using the ground mask and colour and texture information from the orthoimagery. During segmentation of the non-ground LIDAR points, the lines from the latter two classes are used as baselines to locate the nearby LIDAR points of the neighbouring planes. For each plane a robust seed region is thereby defined using the nearby non-ground LIDAR points of a baseline and this region is iteratively grown to extract the complete roof plane. Finally, a newly proposed rule-based procedure is applied to remove planes constructed on trees. Experimental results show that the proposed method can successfully remove vegetation and so offers high extraction rates. Numéro de notice : A2013-486 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.05.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.05.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32624
in ISPRS Journal of photogrammetry and remote sensing > vol 83 (September 2013) . - pp 1 - 18[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2013091 RAB Revue Centre de documentation En réserve L003 Disponible Compensation of measurement errors caused by glass refraction for photogrammetric plantar surface mapping / Jasim Ahmed Ali Al-Baghdadi in Photogrammetric record, vol 28 n° 143 (September - November 2013)PermalinkDevelopment of a vector-based method for coastal bluffline mapping using LiDAR data and a comparison study in the area of lake Erie / Yunjae Choung in Marine geodesy, vol 36 n° 3 (September - November 2013)PermalinkIndirect georeferencing of terrestrial laser scanning data using control lines / Daniel R. Dos Santos in Photogrammetric record, vol 28 n° 143 (September - November 2013)PermalinkPerformance of dense digital surface models based on image matching in the estimation of plot-level forest variables / Kimmo Nurminen in ISPRS Journal of photogrammetry and remote sensing, vol 83 (September 2013)PermalinkA random set approach for modeling integrated uncertainties of traffic islands derived from airborne laser scanning points / Liang Zhou in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 9 (September 2013)PermalinkA synergistic approach for recovering occlusion-free textured 3D maps of urban facades from heterogeneous cartographic data / Karim Hammoudi in International journal of advanced robotic systems, vol 10 (2013)Permalink3-D voxel-based solid modeling of a broad-leaved tree for accurate volume estimation using portable scanning lidar / Fumiki Hosoi in ISPRS Journal of photogrammetry and remote sensing, vol 82 (August 2013)PermalinkAccurate 3D comparison of complex topography with terrestrial laser scanner: Application to the Rangitikei canyon (N-Z) / Dimitri Lague in ISPRS Journal of photogrammetry and remote sensing, vol 82 (August 2013)PermalinkA methodology to characterize vertical accuracies in lidar-derived products at landscape scales / Wade T. Tinkham in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 8 (August 2013)PermalinkA multiresolution hierarchical classification algorithm for filtering airborne LiDAR data / Chuanfa Chen in ISPRS Journal of photogrammetry and remote sensing, vol 82 (August 2013)Permalink