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Smooth transformations between generalized 3D building models for visualization purposes / Martin Kada in Cartography and Geographic Information Science, Vol 42 n° 4 (September 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 4 (September 2015) . - pp 306 - 314 Titre : Smooth transformations between generalized 3D building models for visualization purposes Type de document : Article/Communication Auteurs : Martin Kada, Auteur ; Andreas Wichmann, Auteur ; Tobias Hermes, Auteur Année de publication : 2015 Article en page(s) : pp 306 - 314 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] Bâti-3D [Termes IGN] généralisation sémantique [Termes IGN] visualisation 3D Résumé : (Auteur) The generation of highly detailed 3D city models has significantly matured over the last couple of years. Especially for visualization purposes, these models are needed at several levels of detail (LOD) in fine granular steps that also allow for a smooth transformation from one level to the next to avoid pop-up artifacts. Several methods have been proposed for the automatic generalization of 3D building models that simplify the geometry of given boundary-based models at discrete LODs. In this paper, we present an approach to generate a transformation sequence between two discrete LODs with the purpose to later build a continuous LOD sequence. The method is based on mesh simplification techniques that are extended to a restricted use of edge collapse and vertex move operations applied on triangle meshes augmented by additional breaking lines. The validity of the approach is demonstrated on a case study that is close to reality. Numéro de notice : A2015-513 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2015.1039588 En ligne : https://doi.org/10.1080/15230406.2015.1039588 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77712 [article]

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An update on automatic 3D building reconstruction / Norbert Haala in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 6 (November - December 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 6 (November - December 2010) . - pp 570 - 580 Titre : An update on automatic 3D building reconstruction Type de document : Article/Communication Auteurs : Norbert Haala, Auteur ; Martin Kada, Auteur Année de publication : 2010 Article en page(s) : pp 570 - 580 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] données laser [Termes IGN] état de l'art [Termes IGN] image aérienne [Termes IGN] mise à jour [Termes IGN] photogrammétrie terrestre [Termes IGN] reconstruction 3D du bâti [Termes IGN] télémétrie laser terrestre Résumé : (Auteur) The development of tools for the generation of 3D city models started almost two decades ago. From the beginning, fully automatic reconstruction systems were envisioned to fulfill the need for efficient data collection. However, research on automatic city modelling is still a very active area. The paper will review a number of current approaches in order to comprehensively elaborate the state of the art of reconstruction methods and their respective principles. Originally, automatic city modelling only aimed at polyhedral building objects, which mainly reflects the respective roof shapes and building footprints. For this purpose, airborne images or laser scans are used. In addition to these developments, the paper will also review current approaches for the generation of more detailed facade geometries from terrestrial data collection. Numéro de notice : A2010-489 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.09.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.09.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30682 [article]

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3D builbing reconstruction from lidar based on a cell decomposition approach / Martin Kada (01/12/2009)  

Public contenu dans CMRT09 Object extraction for 3D city models, road databases and traffic monitoring-concepts, algorithms and evaluation / Uwe Stilla (2009)   Titre : 3D builbing reconstruction from lidar based on a cell decomposition approach Type de document : Article/Communication Auteurs : Martin Kada, Auteur ; L. Mckinley, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 01/12/2009 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-3-W4 Conférence : CMRT 2009, City Models, Roads and Traffic, Object extraction for 3D city models, road databases, traffic monitoring 03/09/2009 04/09/2009 Paris France OA ISPRS Archives Importance : pp 47 - 52 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] Berlin [Termes IGN] Cologne [Termes IGN] données lidar [Termes IGN] plan cadastral [Termes IGN] reconstruction 3D du bâti [Termes IGN] texturage [Termes IGN] toit [Termes IGN] ville Résumé : (Auteur) The reconstruction of 3D city models has matured in recent years from a research topic and niche market to commercial products and services. When constructing models on a large scale, it is inevitable to have reconstruction tools available that offer a high level of automation and reliably produce valid models within the required accuracy. In this paper, we present a 3D building reconstruction approach, which produces LOD2 models from existing ground plans and airborne LIDAR data. As well-formed roof structures are of high priority to us, we developed an approach that constructs models by assembling building blocks from a library of parameterized standard shapes. The basis of our work is a 2D partitioning algorithm that splits a building's footprint into nonintersecting, mostly quadrangular sections. A particular challenge thereby is to generate a partitioning of the footprint that approximates the general shape of the outline with as few pieces as possible. Once at hand, each piece is given a roof shape that best fits the LIDAR points in its area and integrates well with the neighbouring pieces. An implementation of the approach is used now for quite some time in a production environment and many commercial projects have been successfully completed. The second part of this-paper reflects the experiences that we have made with this approach working on the 3D reconstruction of the entire cities of East Berlin and Cologne. Numéro de notice : C2009-007 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/3-W4/pub/CMRT09_47.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65047

Automatic generalisation of 3D building models / Martin Kada in GIS Geo-Informations-Systeme, vol 2002 n° 9 (September 2002)

Public [article]  inGIS Geo-Informations-Systeme > vol 2002 n° 9 (September 2002) . - pp 30 - 36 Titre : Automatic generalisation of 3D building models Type de document : Article/Communication Auteurs : Martin Kada, Auteur Année de publication : 2002 Article en page(s) : pp 30 - 36 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] algorithme de filtrage [Termes IGN] cartographie par internet [Termes IGN] compensation par moindres carrés [Termes IGN] généralisation de base de données [Termes IGN] généralisation du bâti [Termes IGN] méthode des moindres carrés [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] reconstruction 3D du bâti [Termes IGN] SIG 3D [Termes IGN] simplification de contour [Termes IGN] simplification de surface [Termes IGN] visualisation 3D [Termes IGN] WebSIG [Vedettes matières IGN] Généralisation Résumé : (Auteur) The paper presents an automatic approach for the generalisation of 3D building models with regard to the visualisation of urban landscapes. Simplified versions of such models are not only needed for level of detail structures in real-time rendering, but also for web-based 3D GIS and for the presentation on mobile computing devices. To yield more sophisticated building models compared to already known surface simplification algorithms from the field of computer vision, the presented solution is based on least squares adjustment theory combined with an elaborate set of surface classification and simplification operations. This concept allows for the integration of surface regularities into the building models which are important for visual impression. These regularities are stringently preserved over the course of the generalisation process. Numéro de notice : A2002-341 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22252 [article]

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