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vol IV-2/W4 - September 2017 - ISPRS Geospatial Week 2017, 18–22 September, Wuhan, China (Bulletin de ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences) / D. Li  

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 IV-2/W4 - September 2017 - ISPRS Geospatial Week 2017, 18–22 September, Wuhan, China Type de document : Périodique Auteurs : D. Li, Éditeur scientifique ; J. Gong, Éditeur scientifique ; B. Yang, Éditeur scientifique ; et al., Éditeur scientifique Année de publication : 2017 Langues : Anglais (eng) Numéro de notice : sans Affiliation des auteurs : non IGN Nature : Numéro de périodique En ligne : https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-2-W4/ Format de la ressource électronique : URL Sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=34819 [n° ou bulletin]

Contient

• Occupancy modelling for moving object detection from Lidar point clouds: A comparative study / Wen Xiao in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol IV-2/W4 (September 2017)  

Automated registration of dense terrestrial laser-scanning point clouds using curves / B. Yang in ISPRS Journal of photogrammetry and remote sensing, vol 95 (September 2014)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 95 (September 2014) . - pp 109 – 121 Titre : Automated registration of dense terrestrial laser-scanning point clouds using curves Type de document : Article/Communication Auteurs : B. Yang, Auteur ; Yufu Zang, Auteur Année de publication : 2014 Article en page(s) : pp 109 – 121 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] appariement de formes [Termes IGN] ligne caractéristique [Termes IGN] semis de points [Termes IGN] télémétrie laser terrestre Résumé : (Auteur) This paper proposes an automatic method for registering terrestrial laser scans in terms of robustness and accuracy. The proposed method uses spatial curves as matching primitives to overcome the limitations of registration methods based on points, lines, or patches as primitives. These methods often have difficulty finding correspondences between the scanned point clouds of freeform surfaces (e.g., statues, cultural heritage). The proposed method first clusters visually prominent points selected according to their associated geometric curvatures to extract crest lines which describe the shape characteristics of point clouds. Second, a deformation energy model is proposed to measure the shape similarity of these crest lines to select the correct matching-curve pairs. Based on these pairs, good initial orientation parameters can be obtained, resulting in fine registration. Experiments were undertaken to evaluate the robustness and accuracy of the proposed method, demonstrating a reliable and stable solution for accurately registering complex scenes without good initial alignment. Numéro de notice : A2014-475 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2014.05.012 En ligne : https://doi.org/10.1016/j.isprsjprs.2014.05.012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74052 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2014091	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Automatic extraction of road markings from mobile Lidar point clouds / B. Yang in Photogrammetric Engineering & Remote Sensing, PERS, vol 78 n° 4 (April 2012)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 78 n° 4 (April 2012) . - pp 331 - 338 Titre : Automatic extraction of road markings from mobile Lidar point clouds Type de document : Article/Communication Auteurs : B. Yang, Auteur ; Leyuan Fang, Auteur ; Qi Li, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 331 - 338 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] extraction automatique [Termes IGN] interpolation [Termes IGN] lasergrammétrie [Termes IGN] segmentation [Termes IGN] semis de points [Termes IGN] signalisation routière Résumé : (Auteur) Among implicit information of laser points, the strength of reflection of laser points is closely related to the property of road materials which helps detecting road markings. This paper presents a novel approach to automatically extracting road markings from mobile lidar point clouds. An interpolation method is first used to generate a georeferenced feature image of the point cloud, which helps to isolate the points of road surfaces. Then, an algorithm is used to separate these points within a range according to their strength of reflection. The separated points are further segmented to remove non-road points based on height threshold. Finally, the outlines of road markings are extracted from the segmented points using the semantic knowledge of road markings. The results demonstrated that our method was very promising for automatic extraction of road markings from lidar point clouds collected by a land-based mobile lidar system, an Optech Lynx Mobile Mapper. Numéro de notice : A2012-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.78.4.331 En ligne : https://doi.org/10.14358/PERS.78.4.331 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31625 [article]

Variable-resolution compression of vector data / B. Yang in Geoinformatica, vol 12 n° 3 (September - November 2008)  

Public [article]  inGeoinformatica > vol 12 n° 3 (September - November 2008) . - pp 357 - 376 Titre : Variable-resolution compression of vector data Type de document : Article/Communication Auteurs : B. Yang, Auteur ; Ross S. Purves, Auteur ; Robert Weibel, Auteur Année de publication : 2008 Article en page(s) : pp 357 - 376 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] arc [Termes IGN] compression de données [Termes IGN] données vectorielles [Termes IGN] élimination de points [Termes IGN] noeud [Termes IGN] objet géographique [Termes IGN] résolution multiple Résumé : (Auteur) The compression of spatial data is a promising solution to reduce the space of data storage and to decrease the transmission time of spatial data over the Internet. This paper proposes a new method for variable-resolution compression of vector data. Three key steps are encompassed in the proposed method, namely, the simplification of vector data via the elimination of vertices, the compression of removed vertices, and the decoding of the compressed vector data. The proposed compression method was implemented and applied to compress vector data to investigate its performance in terms of the compression ratio, distortions of geometric shapes. The results show that the proposed method provides a feasible and efficient solution for the compression of vector data, is able to achieve good compression ratios and maintains the main shape characteristics of the spatial objects within the compressed vector data. Copyright Springer Numéro de notice : A2008-284 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-007-0036-x En ligne : https://doi.org/10.1007/s10707-007-0036-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29277 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-08031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A multi-parameter approach to automated building grouping and generalization / Hongxiang Yan in Geoinformatica, vol 12 n° 1 (March - May 2008)  

Public [article]  inGeoinformatica > vol 12 n° 1 (March - May 2008) . - pp 73 - 89 Titre : A multi-parameter approach to automated building grouping and generalization Type de document : Article/Communication Auteurs : Hongxiang Yan, Auteur ; Robert Weibel, Auteur ; B. Yang, Auteur Année de publication : 2008 Article en page(s) : pp 73 - 89 Langues : Anglais (eng) Descripteur : [Termes IGN] détection du bâti [Termes IGN] diagramme de Voronoï [Termes IGN] généralisation cartographique automatisée [Termes IGN] généralisation du bâti [Termes IGN] triangulation de Delaunay [Vedettes matières IGN] Généralisation Résumé : (Auteur) This paper presents an approach to automated building grouping and generalization. Three principles of Gestalt theories, i.e. proximity, similarity, and common directions, are employed as guidelines, and six parameters, i.e. minimum distance, area of visible scope, area ratio, edge number ratio, smallest minimum bounding rectangle (SMBR), directional Voronoi diagram (DVD), are selected to describe spatial patterns, distributions and relations of buildings. Based on these principles and parameters, an approach to building grouping and generalization is developed. First, buildings are triangulated based on Delaunay triangulation rules, by which topological adjacency relations between buildings are obtained and the six parameters are calculated and recorded. Every two topologically adjacent buildings form a potential group. Three criteria from previous experience and Gestalt principles are employed to tell whether a 2-building group is ‘strong,’ ‘average’ or ‘weak.’ The ‘weak’ groups are deleted from the group array. Secondly, the retained groups with common buildings are organized to form intermediate groups according to their relations. After this step, the intermediate groups with common buildings are aggregated or separated and the final groups are formed. Finally, appropriate operators/algorithms are selected for each group and the generalized buildings are achieved. This approach is fully automatic. As our experiments show, it can be used primarily in the generalization of buildings arranged in blocks. Copyright Springer Numéro de notice : A2008-070 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-007-0020-5 En ligne : https://doi.org/10.1007/s10707-007-0020-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29065 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-08011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Efficient transmission of vector data over the Internet / B. Yang in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)  

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An integrated TIN and Grid method for constructing multi-resolution digital terrain models / B. Yang in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)  

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An object-oriented data model for complex objects in three-dimensional geographical information systems / Wei Shi in International journal of geographical information science IJGIS, vol 17 n° 5 (july - August 2003)  

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