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Utility-pole detection based on interwoven column generation from terrestrial mobile Laser scanner data / Siamak Talebi Nahr in Photogrammetric record, Vol 36 n° 176 (December 2021)  

Public [article]  inPhotogrammetric record > Vol 36 n° 176 (December 2021) . - pp 402 - 424 Titre : Utility-pole detection based on interwoven column generation from terrestrial mobile Laser scanner data Type de document : Article/Communication Auteurs : Siamak Talebi Nahr, Auteur ; Mohammad Saadatseresht, Auteur Année de publication : 2021 Article en page(s) : pp 402 - 424 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] détection d'objet [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] équipement collectif [Termes IGN] exactitude des données [Termes IGN] exhaustivité des données [Termes IGN] lidar mobile [Termes IGN] mur [Termes IGN] objet géographique complexe [Termes IGN] objet géographique urbain [Termes IGN] partitionnement par bloc [Termes IGN] qualité des données [Termes IGN] réseau électrique [Termes IGN] scène urbaine Résumé : (Auteur) Mobile lidar scanning is one of the recent technologies that is used to map street scenes rapidly. Among street objects, utility-poles are more critical to energy companies to monitor regularly through time. This paper presents a novel approach to detect utility-poles from mobile lidar data in complex city scenes. After removing ground points, the scene is gridded into blocks based on a shared-partitioning algorithm. Next, an interwoven column generation algorithm is used to create columns. Finally, each of these columns is considered to be a utility-pole or not. The proposed algorithm is tested on two test areas. The algorithm achieved Completeness, Correctness and Quality of 92.8%, 97.5% and 90.6% in Area 1, and 92.8%, 92.2% and 86.1% in Area 2. The total number of utility-poles in both areas was 265. The algorithm shows promising results in utility-pole detection in complex city scenes with attached walls. Numéro de notice : A2021-916 Affiliation des auteurs : non IGN Thématique : IMAGERIE/URBANISME Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/phor.12394 Date de publication en ligne : 10/12/2021 En ligne : https://doi.org/10.1111/phor.12394 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99331 [article]

Automated co-registration of satellite images through luminance transformation / Deniz Gerçek in Photogrammetric record, vol 31 n° 156 (December 2016 - February 2017)  

Public [article]  inPhotogrammetric record > vol 31 n° 156 (December 2016 - February 2017) . - pp 407 - 427 Titre : Automated co-registration of satellite images through luminance transformation Type de document : Article/Communication Auteurs : Deniz Gerçek, Auteur ; Davut Çeşmeci, Auteur ; M. Kemal Güllü, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 407 - 427 Note générale : bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] appariement d'images [Termes IGN] caméra numérique [Termes IGN] image satellite [Termes IGN] intensité lumineuse [Termes IGN] partitionnement par bloc [Termes IGN] radiance Résumé : (auteur) This paper presents an extensive evaluation of a novel intensity-based image co-registration method called luminance transformed differences (LTD) which is compared with current alternatives. The proposed method suggests the use of the luminance transform operation (LTO) to reduce luminance differences between images that may well affect image registration accuracy. Registration is implemented in a block-based fashion in order to achieve a non-rigid transformation at a sub-pixel accuracy level. Sample images from different sensors, exhibiting various geometric distortions, are registered to test the various intensity-based image registration alternatives. LTD is found to outperform other methods; its high accuracy can be achieved even using small searching blocks which substantially reduce the computational cost. Numéro de notice : A2016--004 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12160 Date de publication en ligne : 04/10/2016 En ligne : https://doi.org/10.1111/phor.12160 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83822 [article]

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106-2016041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

DTM generalisation : handling large volumes of data for multi-scale mapping / O. Chaudry in Cartographic journal (the), vol 47 n° 4 (November 2010)  

Public [article]  inCartographic journal (the) > vol 47 n° 4 (November 2010) . - pp 360 - 370 Titre : DTM generalisation : handling large volumes of data for multi-scale mapping Type de document : Article/Communication Auteurs : O. Chaudry, Auteur ; William A Mackaness, Auteur Année de publication : 2010 Article en page(s) : pp 360 - 370 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] données multiéchelles [Termes IGN] généralisation automatique de données [Termes IGN] généralisation de MNT [Termes IGN] modèle numérique de surface [Termes IGN] modèle numérique de terrain [Termes IGN] morphologie mathématique [Termes IGN] partitionnement par bloc [Termes IGN] représentation multiple Résumé : (Auteur) Map generalisation is a modelling process in which it is typical that detailed, high dimensional geographic phenomena are reduced down to a set of `higher order', yet more generalized set of phenomena (for example, a large cluster of buildings is reduced to `city'). This process of generalisation necessarily requires us to handle large volumes of data which results in high processing overheads. One way of managing this is to partition the data. When geographically partitioning data, we need to partition in such a way that each partition can be generalized without having to consider regions outside any given partition. The focus of this paper is to explore partitioning and generalisation methodologies that can be applied to digital elevation data - the ambition being to derive generalized descriptions of morphology at the National Scale (for the UK). The paper describes and compares two solutions to this problem, and demonstrates how it is possible to apply generalisation algorithms to national coverages. Numéro de notice : A2010-543 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870410X12825500202896 Date de publication en ligne : 29/11/2013 En ligne : https://doi.org/10.1179/000870410X12825500202896 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30735 [article]

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030-2010041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A discrete global grid system based on the parallels plane projection / T. Ma in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1297 - 1313 Titre : A discrete global grid system based on the parallels plane projection Type de document : Article/Communication Auteurs : T. Ma, Auteur ; Y. Zhou, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1297 - 1313 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] déformation géométrique [Termes IGN] ellipsoïde de révolution [Termes IGN] parallèle [Termes IGN] partitionnement par bloc [Termes IGN] projection équivalente Résumé : (Auteur) We developed a direct partitioning method to construct a seamless discrete global grid system (DGGS) with any resolution based on a two-dimensional projected plane and the earth ellipsoid. This DGGS is composed of congruent square grids over the projected plane and irregular ellipsoidal quadrilaterals on the ellipsoidal surface. A new equal area projection named the parallels plane (PP) projection derived from the expansion of the central meridian and parallels has been employed to perform the transformation between the planar squares and the corresponding ellipsoidal grids. The horizontal sides of the grids are parts of the parallel circles and the vertical sides are complex ellipsoidal curves, which can be obtained by the inverse expression of the PP projection. The partition strategies, transformation equations, geometric characteristics and distortions for this DGGS have been discussed. Our analysis proves that the DGGS is area-preserving while length distortions only occur on the vertical sides off the central meridian. Angular and length distortions positively correlate to the increase in latitudes and the spanning of longitudes away from a chosen central meridian. This direct partition only generates a small number of broken grids that can be treated individually. Copyright Taylor & Francis Numéro de notice : A2009-390 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.1080/13658810802344150 En ligne : https://doi.org/10.1080/13658810802344150 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30020 [article]

Exemplaires(1)

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079-09061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A partition-based serial algorithm for generating viewshed on massive DEMs / H. Wu in International journal of geographical information science IJGIS, vol 21 n° 9-10 (october 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 955 - 964 Titre : A partition-based serial algorithm for generating viewshed on massive DEMs Type de document : Article/Communication Auteurs : H. Wu, Auteur ; M. Pan, Auteur ; L. Yao, Auteur ; B. Luo, Auteur Année de publication : 2007 Article en page(s) : pp 955 - 964 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] algorithme géométrique [Termes IGN] modèle numérique de surface [Termes IGN] partitionnement par bloc Résumé : (Auteur) As increasingly large-scale and higher-resolution terrain data have become available, for example air-form and space-borne sensors, the volume of these datasets reveals scalability problems with existing GIS algorithms. To address this problem, a kind of serial algorithm was developed to generate viewshed on large grid-based digital elevation models (DEMs). We first divided the whole DEM into rectangular blocks in row and column directions (called block partitioning), then processed these blocks with four axes followed by four sectors sequentially. When processing the particular block, we adopted the 'reference plane' algorithm to calculate the visibility of the target point on the block, and adjusted the calculation sequence according to the different spatial relationships between the block and the viewpoint since the viewpoint is not always inside the DEM. By adopting the 'Reference Plane' algorithm and using a block partitioning method to segment and load the DEM dynamically, it is possible to generate viewshed efficiently in PC-based environments. Experiments showed that the divided block should be dynamically loaded whole into computer main memory when partitioning, and the suggested approach retains the accuracy of the reference plane algorithm and has near linear compute complexity. Copyright Taylor & Francis Numéro de notice : A2007-551 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601034218 En ligne : https://doi.org/10.1080/13658810601034218 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28914 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-07061	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-07062	RAB	Revue	Centre de documentation	En réserve L003	Disponible