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A 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)  

Public [article]  inInternational journal of advanced robotic systems > vol 10 (2013) . - pp 316 - 326 Titre : A synergistic approach for recovering occlusion-free textured 3D maps of urban facades from heterogeneous cartographic data Type de document : Article/Communication Auteurs : Karim Hammoudi , Auteur ; Fadi Dornaika , Auteur ; Bahman Soheilian , Auteur ; Bruno Vallet , Auteur ; John McDonald, Auteur ; Nicolas Paparoditis , Auteur Année de publication : 2013 Article en page(s) : pp 316 - 326 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] façade [Termes IGN] image terrestre [Termes IGN] modèle numérique du bâti [Termes IGN] semis de points [Termes IGN] texture d'image [Termes IGN] zone urbaine dense Résumé : (auteur) In this paper, we present a practical approach for generating an occlusion-free textured 3D map of urban facades by the synergistic use of terrestrial images, 3D point clouds and area-based information. Particularly in dense urban environments, the high presence of urban objects in front of the facades causes significant difficulties for several stages in computational building modeling. Major challenges lie on the one hand in extracting complete 3D facade quadrilateral delimitations and on the other hand in generating occlusion-free facade textures. For these reasons, we describe a straightforward approach for completing and recovering facade geometry and textures by exploiting the data complementarity of terrestrial multi-source imagery and area-based information. Numéro de notice : A2013-804 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Article DOI : 10.5772/56570 Date de publication en ligne : 01/01/2013 En ligne : http://dx.doi.org/10.5772/56570 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80078 [article]

Design, implementation and simulation of an experimental multi-camera imaging system for terrestrial and multi-purpose mobile mapping platforms: a case study / Karim Hammoudi in Applied Mechanics and Materials, vol 332 (2013)  

Public [article]  inApplied Mechanics and Materials > vol 332 (2013) . - pp 139 - 144 Titre : Design, implementation and simulation of an experimental multi-camera imaging system for terrestrial and multi-purpose mobile mapping platforms: a case study Type de document : Article/Communication Auteurs : Karim Hammoudi , Auteur ; John McDonald, Auteur Année de publication : 2013 Projets : 2-Pas d'info accessible - article non ouvert / Article en page(s) : pp 139 - 144 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] prise de vue terrestre [Termes IGN] système de numérisation mobile Résumé : (auteur) Mobile Mapping Systems (MMS’s) are powerful tools for rapidly and massively collecting imagery in various environments (e.g., rural, semi-urban, urban). In particular, the data collected at terrestrial level can be exploited to complement aerial acquisitions for extending GIS databases,visualizing and modeling urban environments and studying environment morphogenesis over time. Hence, the development of mobile mapping platforms is a topic of great interest for many mapping agencies and surveying companies. Moreover, the experimental imaging systems of mapping vehicles are equipped with varied infrastructures in part resulting from the wide range of targeted applications. Determining a detailed design procedure for such imaging systems is of critical importance, and can be both arduous and time-consuming. Although commercial imaging systems can be exploited directly they are often pre-configured for specific applications. For these reasons, we propose a case study that deals with the development of an orientable and scalable imaging system. In particular, this paper focusses on the primary stage of the mechanical implementation of a multi-camera infrastructure. To this effect, we provide a design document that includes full technical specifications and drawings for creating a roof-mounted camera mast from a vehicle platform. We also provide an inventory of resources required for creating the system. As part of the design process we analyse some well-known MMS’s paying particular attention to their imaging systems. Finally, we evaluate the proposed design by creating the complete 3D mock-up of the camera system at real-scale and by simulating camera configurations from an experimental van platform. Experimental results clearly show the usefulness of this study in the design of an experimental and multi-purpose imaging system. Numéro de notice : A2013-805 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.4028/www.scientific.net/AMM.332.139 En ligne : http://dx.doi.org/10.4028/www.scientific.net/AMM.332.139 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80114 [article]

Recovering quasi-real occlusion-free textures for facade models by exploiting fusion of image and laser street data and image inpainting / Karim Hammoudi (2012)  

Public Titre : Recovering quasi-real occlusion-free textures for facade models by exploiting fusion of image and laser street data and image inpainting Type de document : Article/Communication Auteurs : Karim Hammoudi , Auteur ; Fadi Dornaika , Auteur ; Bahman Soheilian , Auteur ; Bruno Vallet , Auteur ; John McDonald, Auteur ; Nicolas Paparoditis , Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2012 Conférence : WIAMIS 2012, 13th International Workshop on Image Analysis for Multimedia Interactive Services 23/05/2012 25/05/2012 Dublin Irlande Proceedings IEEE Importance : pp Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] fusion d'images [Termes IGN] reconstruction d'image [Termes IGN] semis de points [Termes IGN] système de numérisation mobile [Termes IGN] texture d'image Résumé : (auteur) In this paper we present relevant results for the texturing of 3D urban facade models by exploiting the fusion of terrestrial multi-source data acquired by a Mobile Mapping System (MMS) and image inpainting. Current 3D urban facade models are often textured by using images that contain parts of urban objects that belong to the street. These urban objects represent in this case occlusions since they are located between the acquisition system and the facades. We show the potential use of georeferenced images and 3D point clouds that are acquired at street level by the MMS in generating occlusion-free facade textures. We describe a methodology for reconstructing quasi-real textures of facades that are highly occluded by wide frontal objects. Numéro de notice : C2012-036 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Autre URL associée : autre Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/WIAMIS.2012.6226763 Date de publication en ligne : 28/06/2012 En ligne : https://doi.org/10.1109/WIAMIS.2012.6226763 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101267

Fusion of camera images and laser scans for wide baseline 3D scene alignment in urban environments / Michael Ying Yang in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 supplement (December 2011)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 66 n° 6 supplement (December 2011) . - pp 52 - 61 Titre : Fusion of camera images and laser scans for wide baseline 3D scene alignment in urban environments Type de document : Article/Communication Auteurs : Michael Ying Yang, Auteur ; Y. Cao, Auteur ; John McDonald, Auteur Année de publication : 2011 Article en page(s) : pp 52 - 61 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] données lidar [Termes IGN] données localisées 2D [Termes IGN] données localisées 3D [Termes IGN] extraction de traits caractéristiques [Termes IGN] fusion de données [Termes IGN] lasergrammétrie [Termes IGN] ligne de base [Termes IGN] prise de vue terrestre [Termes IGN] semis de points [Termes IGN] superposition de données [Termes IGN] zone urbaine Résumé : (Auteur) In this paper we address the problem of automatic laser scan registration in urban environments. This represents a challenging problem for two major reasons. First, two individual laser scans might be captured at significantly changed viewpoints (wide baseline) and have very little overlap. Second, man-made buildings usually contain many structures of similar appearances. This will result in considerable aliasing in the matching process. By sensor fusion of laser data with camera images, we propose a novel improvement to the existing 2D feature techniques to enable automatic 3D alignment between two widely separated scans. The key idea consists of extracting dominant planar structures from 3D point clouds and then utilizing the recovered 3D geometry to improve the performance of 2D image feature for wide baseline matching. The resulting feature descriptors become more robust to camera viewpoint changes after the procedure of viewpoint normalization. Moreover, the viewpoint normalized 2D features provide robust local feature information including patch scale and dominant orientation for effective repetitive structure matching in man-made environments. Comprehensive experimental evaluations with real data demonstrate the potential of the proposed method for automatic wide baseline 3D scan alignment in urban environments. Numéro de notice : A2011-518 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2011.09.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2011.09.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31412 [article]

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