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International Society for Photogrammetry and Remote Sensing ISPRS
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contenu dans Geospatial theory, processing and applications : proceedings of the ISPRS commission 4 symposium, 8 -12 July 2002, Ottawa, Canada / Costas Armenakis (2002)
Titre : Generalization of 3D building data Type de document : Article/Communication Auteurs : Franck Thiemann, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 01/08/2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-4 Conférence : ISPRS 2002, Commission 4 symposium, Geospatial theory, processing and applications 08/07/2002 12/07/2002 Ottawa Canada OA ISPRS Archives Importance : pp 286 - 290 Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation automatique de données
[Termes IGN] reconstruction 3D
[Termes IGN] visualisation de données
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Today, more and more (semi-) automatic tools and techniques are getting available, that allow for an efficient capture of more and more detailed 3D city models. With the availability of such data, the question rises, how these typically huge data sets can efficiently be handled, manipulated, analysed and visualized. Concerning visualization, the Level of Detail (LOD) concept from Computer Graphic provides a mechanism to only present that information, that is currently visible in an adequate resolution level. The problem, however, is how such a multi-scale representation of buildings can be automatically gained. This generation is a generalization problem. In the paper a concept is sketched, that relies on the representation of buildings in terms of Constructive Solid Geometry (CSG). Firstly, the complex building shape has to be transformed into CSG, which involves a segmentation of the building into its relevant parts. Secondly, generalization mechanisms can operate on the CSG-tree. Finally, the transition between neighbouring generalization levels is achieved using a differential scheme, where only the differences between adjacent generalization levels are stored, instead of the whole models. Numéro de notice : C2002-021 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : http://www.isprs.org/proceedings/XXXIV/part4/pdfpapers/455.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64979 Documents numériques
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Generalization of 3D building data - pdf éditeurAdobe Acrobat PDF
Titre : 3D visualization of building from Lidar and Ikonos image Type de document : Article/Communication Auteurs : Zheng Ji, Auteur ; Jianqing Zhang, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-2 Conférence : ISPRS 2002, Commission 2 symposium, Integrated System for Spatial Data Production, Custodian and Decision Support 20/08/2002 23/08/2002 Xi'an Chine OA ISPRS Archives Importance : 4 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] données lidar
[Termes IGN] image Ikonos
[Termes IGN] impulsion laser
[Termes IGN] modèle numérique de surface
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] superposition d'images
[Termes IGN] visualisation 3DRésumé : (Auteur) Laser Scanner can measure the direct distance from the aircraft to the terrain surface by run-time emitting and reflecting laser pulse. DEM can be available with lower costs and sort period than over ways. IKONOS Satellite can get high resolution image. Combining DEM from laser scanning and texture from IKONOS image in the same region can provide a low-cost way to realize 3D-visualization to a certain extent. Registring IKONOS image and LIDAR image is the most important procedure. Two algorithms are adopted in the registration of IKONOS image as texture information and LIDAR image as three-dimensional spatial information. Numéro de notice : C2002-032 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXIV/part2/paper/036_050.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64380 Extracting 3D edgels hypotheses from multiple calibrated images : a step towards the reconstruction of curved and straight object boundary lines / Franck Jung (2002)
contenu dans Proceedings of the ISPRS commission 3 symposium, Photogrammetric computer vision, september 9 - 13, 2002, Graz Austria, Part B. Papers accepted on the basis of abstracts / R. Kalliany (2002)
Titre : Extracting 3D edgels hypotheses from multiple calibrated images : a step towards the reconstruction of curved and straight object boundary lines Type de document : Article/Communication Auteurs : Franck Jung , Auteur ; Vincent Tollu, Auteur ; Nicolas Paparoditis , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-3B Conférence : PCV 2002, ISPRS commission 3 symposium, Photogrammetric computer vision 09/09/2002 13/09/2002 Graz Autriche OA ISPRS Archives Importance : pp 100 - 104 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] contour
[Termes IGN] image aérienne
[Termes IGN] reconstruction d'objet
[Termes IGN] Triangulated Irregular NetworkRésumé : (auteur) This paper describes a novel technique to extract 3D elementary linear elements from multiple views, often called edgels, that are 3D points with tangent direction. Techniques based on stereopair feature, edgel or contour, matching have been intensively developed in the 80s. The relatively poor quality of images used at the time and the ill-posed stereo context contributed to focus the research around segment matching, which provided fairly good results on objects with rectilinear boundaries. Here, we take advantage of the multiplication and of the high quality of images provided by a digital frame camera to revisit this feature matching technique and to enhance the accuracy, the detection and the robustness of a 3D elementary edgel feature estimator. 3D edgels introduce the lowest implicit modelisation as possible, thus allowing the characterisation and reconstruction of curved and straight linear structures which are widespread in our manmade world. The 3D points with tangent directions generated by our estimator can be directly injected in a surface reconstruction framework based on tensor voting (Tang and Medioni, 1998). In a more practical and photogrammetric context, e.g. HR aerial images of urban landscapes, these low-level features can be used to build 3D lines that can be injected as constraint lines in addition to other features, such as 3D points and 3D segments, in a triangulation process (Paparoditis et al., 2001) to improve the surface reconstruction of manmade objects (buildings, pavements, roads, etc.). These features can also be used to construct higher level features such as planar facets in aerial images of urban areas for building reconstruction. Numéro de notice : C2002-025 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : Poster-avec-CL DOI : sans En ligne : http://www.isprs.org/proceedings/XXXIV/part3/papers/paper144.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86135 Documents numériques
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Extracting 3D edgels hypotheses - pdf éditeurAdobe Acrobat PDF Formalising the geographic database generalisation process by means of a conflicts/operations graph / Dominique Han-Sze-Chuen (2002)
contenu dans Geospatial theory, processing and applications : proceedings of the ISPRS commission 4 symposium, 8 -12 July 2002, Ottawa, Canada / Costas Armenakis (2002)
Titre : Formalising the geographic database generalisation process by means of a conflicts/operations graph Type de document : Article/Communication Auteurs : Dominique Han-Sze-Chuen, Auteur ; Sébastien Mustière , Auteur ; Bernard Moulin, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-4 Conférence : ISPRS 2002, Commission 4 symposium, Geospatial theory, processing and applications 08/07/2002 12/07/2002 Ottawa Canada OA ISPRS Archives Importance : pp 269 - 273 Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation automatique de données
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] graphe
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Database generalisation is a process which aims at producing a geographic database from an initial geographic database in order to satisfy new needs. Starting from the study of an actual database generalisation process developed at the Ministere des Ressources Naturelles of Quebec (MRNQ), our intention was to formalise the cartographic knowledge contained in the process to make it reusable. MRNQ's process has the form of a workflow which contains a list of actions applied to object classes. Since we wanted to extract generic knowledge, we introduced the notions of problem and operation: our assumption is that the cartographic knowledge formalised using these two notions is generic enough to be applied to other cases of generalisation. Thus, we propose a causal graph which associates a set of problems to a set of operations. The utility of such a model is that it offers an explanation for each actions contained in the workflow and allows an anticipation of future problems when creating a new workflow. Numéro de notice : C2002-020 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://www.isprs.org/proceedings/XXXIV/part4/pdfpapers/374.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64978 Documents numériques
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Formalising the geographic database generalisation process - pdf éditeurAdobe Acrobat PDF Geospatial theory, processing and applications : proceedings of the ISPRS commission 4 symposium, 8 -12 July 2002, Ottawa, Canada / Costas Armenakis (2002)
Titre : Geospatial theory, processing and applications : proceedings of the ISPRS commission 4 symposium, 8 -12 July 2002, Ottawa, Canada Type de document : Actes de congrès Auteurs : Costas Armenakis, Éditeur scientifique ; Y.C. Lee, Éditeur scientifique Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-4 Conférence : ISPRS 2002, Commission 4 symposium, Geospatial theory, processing and applications 08/07/2002 12/07/2002 Ottawa Canada OA ISPRS Archives Importance : 808 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie
[Termes IGN] analyse spatiale
[Termes IGN] base de données localisées
[Termes IGN] cartographie numérique
[Termes IGN] exploration de données
[Termes IGN] généralisation automatique de données
[Termes IGN] Infrastructure de données
[Termes IGN] intégration de données
[Termes IGN] visualisation de donnéesNuméro de notice : 10549 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Actes DOI : sans En ligne : https://www.isprs.org/proceedings/XXXIV/part4/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34532 ContientRéservation
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Code-barres Cote Support Localisation Section Disponibilité 10549-01 CG2002 Livre Centre de documentation Congrès Disponible Proceedings of the ISPRS commission 3 symposium, Photogrammetric computer vision, september 9 - 13, 2002, Graz Austria, Part B. Papers accepted on the basis of abstracts / R. Kalliany (2002)PermalinkProceedings of the ISPRS commission 3 symposium, Photogrammetric computer vision, september 9 - 13, 2002, Graz Austria, Part A. Papers accepted on the basis of peer-review full manuscripts / R. Kalliany (2002)PermalinkReconstruction of 3D linear primitives from multiple views for urban areas modelisation / Franck Taillandier (2002)PermalinkPermalinkPermalinkPermalinkKnowledge based system for the automatic extraction of road intersections from aerial images / Nicolas Boichis (2000)PermalinkMachine learning techniques for determining parameters of cartographic generalisation algorithms / Lagrange (Enseigne de Vaisseau) (2000)PermalinkA Plane-sweep strategy for the 3D reconstruction of buildings from multiple images / Caroline Baillard (2000)PermalinkSurface reconstruction in urban areas from multiple views of aerial digital frame cameras / Nicolas Paparoditis (2000)Permalink