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Setting the standard in city digitalisation / Marie-Caroline Rondeau in Geoinformatics, vol 18 n° 8 (December 2015) 

Public [article]  inGeoinformatics > vol 18 n° 8 (December 2015) . - pp 20 - 21 Titre : Setting the standard in city digitalisation Type de document : Article/Communication Auteurs : Marie-Caroline Rondeau, Auteur Année de publication : 2015 Article en page(s) : pp 20 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes descripteurs IGN] Alès [Termes descripteurs IGN] Gap [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] plan corps de rue simplifié Numéro de notice : A2015-807 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78836 [article]

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Automatic registration of optical aerial imagery to a LiDAR point cloud for generation of city models / Bernard O. Abayowa in ISPRS Journal of photogrammetry and remote sensing, vol 106 (August 2015)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 106 (August 2015) . - pp 68 - 81 Titre : Automatic registration of optical aerial imagery to a LiDAR point cloud for generation of city models Type de document : Article/Communication Auteurs : Bernard O. Abayowa, Auteur ; Alper Yilmaz, Auteur ; Russell C. Hardie, Auteur Année de publication : 2015 Article en page(s) : pp 68 - 81 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes descripteurs IGN] algorithme ICP [Termes descripteurs IGN] corrélation croisée normalisée [Termes descripteurs IGN] données lidar [Termes descripteurs IGN] données localisées 3D [Termes descripteurs IGN] image aérienne [Termes descripteurs IGN] image optique [Termes descripteurs IGN] méthode robuste [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] modèle numérique de surface [Termes descripteurs IGN] reconstruction 3D [Termes descripteurs IGN] scène [Termes descripteurs IGN] semis de points [Termes descripteurs IGN] superposition d'images Résumé : (auteur) This paper presents a framework for automatic registration of both the optical and 3D structural information extracted from oblique aerial imagery to a Light Detection and Ranging (LiDAR) point cloud without prior knowledge of an initial alignment. The framework employs a coarse to fine strategy in the estimation of the registration parameters. First, a dense 3D point cloud and the associated relative camera parameters are extracted from the optical aerial imagery using a state-of-the-art 3D reconstruction algorithm. Next, a digital surface model (DSM) is generated from both the LiDAR and the optical imagery-derived point clouds. Coarse registration parameters are then computed from salient features extracted from the LiDAR and optical imagery-derived DSMs. The registration parameters are further refined using the iterative closest point (ICP) algorithm to minimize global error between the registered point clouds. The novelty of the proposed approach is in the computation of salient features from the DSMs, and the selection of matching salient features using geometric invariants coupled with Normalized Cross Correlation (NCC) match validation. The feature extraction and matching process enables the automatic estimation of the coarse registration parameters required for initializing the fine registration process. The registration framework is tested on a simulated scene and aerial datasets acquired in real urban environments. Results demonstrates the robustness of the framework for registering optical and 3D structural information extracted from aerial imagery to a LiDAR point cloud, when co-existing initial registration parameters are unavailable. Numéro de notice : A2015-722 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern En ligne : http://www.sciencedirect.com/science/article/pii/S0924271615001434 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78369 [article]

Oblique aerial image acquisition, 3D city modeling, 3D city guide project for Konya metropolitan municipality / Tuncer Ozerbil in International journal of 3-D information modeling, vol 4 n° 2 (April - June 2015)

Public [article]  inInternational journal of 3-D information modeling > vol 4 n° 2 (April - June 2015) . - pp34 - 37 Titre : Oblique aerial image acquisition, 3D city modeling, 3D city guide project for Konya metropolitan municipality Type de document : Article/Communication Auteurs : Tuncer Ozerbil, Auteur ; Ergun Gokten, Auteur ; Mustafa Onder, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp34 - 37 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes descripteurs IGN] CityGML [Termes descripteurs IGN] image aérienne à axe vertical [Termes descripteurs IGN] image aérienne oblique [Termes descripteurs IGN] intégration de données [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] Oracle [Termes descripteurs IGN] système d'information géographique [Termes descripteurs IGN] Turquie Résumé : (auteur) Usage of aerial oblique cameras and oblique images in generation of 3D city models has become popular all over the world in recent years and various solutions has been developed involving specialized methods and softwares. The first comprehensive step in this field was taken by Konya Metropolitan Municipality in Turkey in 2012 and the project undertaken by GEOGIS has been successfully completed in Februaty 2014. It is the fast Lime in Turkey that 3D city model of this large scale has been generated. The project involves: Aerial image acquisition of the project area with vertical and oblique cameras respectively and photogrammetric triangulation; Development of OttoPenta software, which can display oblique images in pentaview screen, make spatial queries and also can measure the horizontal, vertical distance and area; Digitization of roof and roof structures from vertical stereo images using photogrammetric intertetation techniques and generation of 3D solid building models using this data; Assigning building ID numbers to solid models to integrate with the GIS data of the Municipality that is available in Oracle Spatial database; Automatic texturing of 3D models with oblique images; Exporting of textuted 3D models into Oracle Spatial Database in CityGML format, complying the OGC standards; and development of KNVCity software, to create and publish the 3D city guide on WEB and mobile devices. The goal of this paper is sharing the experience and knowledge that was gained during the 3D City modeling and 3D city guide project which was performed for the first time in Turkey. Numéro de notice : A2015-586 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77862 [article]

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Persistent scatterers at building facades – Evaluation of appearance and localization accuracy / Stefan Gernhardt in ISPRS Journal of photogrammetry and remote sensing, vol 100 (February 2015)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 100 (February 2015) . - pp 92 - 105 Titre : Persistent scatterers at building facades – Evaluation of appearance and localization accuracy Type de document : Article/Communication Auteurs : Stefan Gernhardt, Auteur ; Stefan Auer, Auteur ; Konrad Eder, Auteur Année de publication : 2015 Article en page(s) : pp 92 - 105 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes descripteurs IGN] coin réflecteur [Termes descripteurs IGN] estimation de position [Termes descripteurs IGN] façade [Termes descripteurs IGN] image optique [Termes descripteurs IGN] image radar moirée [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] modélisation 3D [Termes descripteurs IGN] Munich [Termes descripteurs IGN] photogrammétrie architecturale [Termes descripteurs IGN] photogrammétrie terrestre Résumé : (auteur) Thanks to the high resolution of modern SAR satellites many persistent scatterers (PS) appear at single buildings. Approximately half of them represent building facades. These groups of points often show regular patterns in SAR images that can be related to repeating structure elements on the facades. Hence, individual buildings can now be monitored over time, either based on amplitude (for change detection) or phase information (using interferometric methods). However, patterns of point signatures are often disrupted or disappear when the imaging geometry is slightly changed. In addition, the localization accuracy of estimated and geocoded natural PS is not known, yet. The investigation at hand provides a detailed analysis of PS patterns based on reference data obtained from a photogrammetric survey and terrestrial measurements. The processing of the optical images allows creating a detailed 3D model of the respective facade, which represents the geometrical object information for SAR simulation. The terrestrial measurements allow relating the 3D model to its true position in a world coordinate system like UTM (Universal Transverse Mercator), which is necessary for assessing the localization accuracy of the signatures. From the simulation results the appearance of the point patterns of natural PS in high resolution SAR data can be better understood. Moreover, the localization accuracy and the precision for these points can be derived for the first time. The approach and findings for two case studies in Munich are described in detail in this paper. Numéro de notice : A2015-056 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern En ligne : http://www.sciencedirect.com/science/article/pii/S0924271614001488 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75300 [article]

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A 3D heterogeneous interactive web mapping application / Quoc-Dinh Nguyen (2015)  

Public contenu dans VR 2015 IEEE Virtual Reality / Tobias Höllerer (2015)   Titre : A 3D heterogeneous interactive web mapping application Type de document : Article/Communication Auteurs : Quoc-Dinh Nguyen, Auteur ; Alexandre Devaux , Auteur ; Nicolas Paparoditis , Auteur Congrès : VR 2015 IEEE Virtual reality (23 - 27 mars 2015; Arles, France), Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2015 Importance : pp 323 - 324 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes descripteurs IGN] données localisées 3D [Termes descripteurs IGN] globe virtuel [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] réalité augmentée [Termes descripteurs IGN] réalité virtuelle [Termes descripteurs IGN] scène urbaine [Termes descripteurs IGN] SIG 3D [Termes descripteurs IGN] web mapping [Termes descripteurs IGN] webGL Résumé : (auteur) The internet browsers nowadays show incredible possibilities with HTML5. It makes it possible to use all the power of your device such as the GPU and all its sensors, GPS, accelerometer, camera, etc. The ability to put hardware-accelerated 3D content in the browser provides a way for the creation of new web based applications that were previously the exclusive domain of the desktop environment. This paper introduces a novel implementation of a 3D GIS WebGL-based navigation system which allows end-users to navigate in a 3D realistic and immersive urban scene, to interact with different spatial data such as panoramic image, laser, 3D-city model, and vector data with modern functionalities such as using your smartphone as a remote, render for 3D screen and make the scene dynamic. Numéro de notice : C2015-032 Affiliation des auteurs : IGN (2012-2019) Thématique : GEOMATIQUE/IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/VR.2015.7223426 date de publication en ligne : 27/08/2015 En ligne : https://doi.org/10.1109/VR.2015.7223426 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83155

3D Modelling with National Coverage: Bridging the Gap Between Research and Practice / Jantien E. Stoter (2015)  

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ISPRS Geospatial Week 2015 / Clément Mallet (2015)  

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An assisting, constrained 3D navigation technique for multiscale virtual 3D city models / Dieter Hildebrandt in Geoinformatica, vol 18 n° 3 (July 2014)  

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Scalable multi-platform distribution of spatial 3D contents / Jan Klimke in International journal of 3-D information modeling, vol 3 n° 3 (July- September 2014)

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Towards a 3D spatial urban energy modelling approach / Jean-Marie Bahu in International journal of 3-D information modeling, vol 3 n° 3 (July- September 2014)

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3D City Models and urban information: Current issues and perspectives / Roland Billen (2014)  

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3D modeling of buildings / Raphaële Heno (2014)  

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Analyse sémantique de nuages de points 3D dans le milieu urbain : sol, façades, objets urbains et accessibilité / Andres Felipe Serna Morales (2014)  

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Inverse Procedural Modelling and Applications / Julien Weissenberg (2014)  

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Numérisation 3D de bâtiments / Raphaële Heno (2014)

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