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Image-based rendering of LOD1 3D city models for traffic-augmented immersive street-view navigation / Mathieu Brédif in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol II-3 W3 (November 2013)  

Public [article]  inISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences > vol II-3 W3 (November 2013) . - pp 7 - 11 Titre : Image-based rendering of LOD1 3D city models for traffic-augmented immersive street-view navigation Type de document : Article/Communication Auteurs : Mathieu Brédif , Auteur Année de publication : 2013 Projets : iSpace&Time / Brédif, Mathieu Conférence : CMRT 2013, City Models, Roads and Traffic 12/11/2013 13/11/2013 Antalya Turquie OA ISPRS Annals Article en page(s) : pp 7 - 11 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] navigation virtuelle [Termes IGN] niveau de détail [Termes IGN] rendu réaliste [Termes IGN] simulation 3D [Termes IGN] système de numérisation mobile [Termes IGN] texturage [Termes IGN] trafic routier [Termes IGN] visualisation 3D Résumé : (auteur) It may be argued that urban areas may now be modeled with sufficient details for realistic fly-through over the cities at a reasonable price point. Modeling cities at the street level for immersive street-view navigation is however still a very expensive (or even impossible) operation if one tries to match the level of detail acquired by street-view mobile mapping imagery. This paper proposes to leverage the richness of these street-view images with the common availability of nation-wide LOD1 3D city models, using an image-based rendering technique : projective multi-texturing. Such a coarse 3D city model may be used as a lightweight scene proxy of approximate coarse geometry. The images neighboring the interpolated viewpoint are projected onto this scene proxy using their estimated poses and calibrations and blended together according to their relative distance. This enables an immersive navigation within the image dataset that is perfectly equal to – and thus as rich as – original images when viewed from their viewpoint location, and which degrades gracefully in between viewpoint locations. Beyond proving the applicability of this preprocessing-free computer graphics technique to mobile mapping images and LOD1 3D city models, our contributions are three-fold. Firstly, image distortion is corrected online in the GPU, preventing an extra image resampling step. Secondly, externally-computed binary masks may be used to discard pixels corresponding to moving objects. Thirdly, we propose a shadowmap-inspired technique that prevents, at marginal cost, the projective texturing of surfaces beyond the first, as seen from the projected image viewpoint location. Finally, an augmented visualization application is introduced to showcase the proposed immersive navigation: images are unpopulated from vehicles using externally-computed binary masks and repopulated using a 3D visualization of a 2D traffic simulation. Numéro de notice : A2013-793 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/isprsannals-II-3-W3-7-2013 En ligne : http://dx.doi.org/10.5194/isprsannals-II-3-W3-7-2013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80399 [article]

Semi-automatic road/pavement modeling using mobile laser scanning / Alexandre Hervieu in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol II-3 W3 (November 2013)  

Public [article]  inISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences > vol II-3 W3 (November 2013) . - pp 31 - 36 Titre : Semi-automatic road/pavement modeling using mobile laser scanning Type de document : Article/Communication Auteurs : Alexandre Hervieu , Auteur ; Bahman Soheilian , Auteur Année de publication : 2013 Projets : 1-Pas de projet / Brédif, Mathieu Conférence : CMRT 2013, City Models, Roads and Traffic 12/11/2013 13/11/2013 Antalya Turquie OA ISPRS Annals Article en page(s) : pp 31 - 36 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] chaussée [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] modèle numérique [Termes IGN] précision centimétrique Résumé : (auteur) Scene analysis, in urban environments, deals with street modeling and understanding. A street mainly consists of roadways, pavements (i.e., walking areas), facades, still and moving obstacles. In this paper, we investigate the surface modeling of roadways and pavements using LIDAR data acquired by a mobile laser scanning (MLS) system. First, road border detection is considered. A system recognizing curbs and curb ramps while reconstructing the missing information in case of occlusion is presented. A user interface scheme is also described, providing an effective tool for semi-automatic processing of large amount of data. Then, based upon road edge information, a process that reconstructs surfaces of roads and pavements has been developed, providing a centimetric precision while reconstructing missing information. This system hence provides an important knowledge of the street, that may open perspectives in various domains such as path planning or road maintenance. Numéro de notice : A2013-794 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/isprsannals-II-3-W3-31-2013 Date de publication en ligne : 08/10/2013 En ligne : http://dx.doi.org/10.5194/isprsannals-II-3-W3-31-2013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80400 [article]

vol II-3 W3 - November 2013 - WG III/4, ICWG III/VII, CMRT13 – City Models, Roads and Traffic 2013 [actes] (12 - 13 novembre 2013; Antalya, Turquie) (Bulletin de ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences) / Franz Rottensteiner  

Public [n° ou bulletin]  est un bulletin de ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences / International society for photogrammetry and remote sensing (1980 -) (2012 - )   Titre : vol II-3 W3 - November 2013 - WG III/4, ICWG III/VII, CMRT13 – City Models, Roads and Traffic 2013 [actes] (12 - 13 novembre 2013; Antalya, Turquie) Type de document : Périodique Auteurs : Franz Rottensteiner, Éditeur scientifique ; Uwe Stilla, Éditeur scientifique ; Stefan Hinz, Éditeur scientifique Année de publication : 2013 Conférence : CMRT 2013, City Models, Roads and Traffic 12/11/2013 13/11/2013 Antalya Turquie OA ISPRS Annals Langues : Anglais (eng) Numéro de notice : sans Affiliation des auteurs : non IGN Nature : Numéro de périodique En ligne : http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W3/index.ht [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=26726 [n° ou bulletin]

Contient

• Image-based rendering of LOD1 3D city models for traffic-augmented immersive street-view navigation / Mathieu Brédif in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol II-3 W3 (November 2013)  
• Semi-automatic road/pavement modeling using mobile laser scanning / Alexandre Hervieu in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol II-3 W3 (November 2013)