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Data fusion of high-resolution satellite imagery and Lidar data for automatic building extraction / Gunho Sohn in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 1 (May 2007)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 62 n° 1 (May 2007) . - pp 43 - 63 Titre : Data fusion of high-resolution satellite imagery and Lidar data for automatic building extraction Type de document : Article/Communication Auteurs : Gunho Sohn, Auteur ; Ian J. Dowman, Auteur Année de publication : 2007 Article en page(s) : pp 43 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] ALTM [Termes IGN] arbre BSP [Termes IGN] détection du bâti [Termes IGN] données lidar [Termes IGN] espace objet [Termes IGN] extraction automatique [Termes IGN] fusion de données multisource [Termes IGN] image Ikonos [Termes IGN] Normalized Difference Vegetation Index [Termes IGN] polygone [Termes IGN] semis de points [Termes IGN] spatial metrics Résumé : (Auteur) This paper aims to present a new approach for automatic extraction of building footprints in a combination of the IKONOS imagery with pan-sharpened multi-spectral bands and the low-sampled (not, vert, similar 0.1 points/m2) airborne laser scanning data acquired from the Optech's 1020 ALTM (Airborne Laser Terrain Mapper). Initially, a laser point cluster in 3D object space was recognized as an isolated building object if all the member points were similarly attributed as building points by investigating the height property of laser points and the normalized difference vegetation indices (NDVI) driven from IKONOS imagery. As modelling cues, rectilinear lines around building outlines collected by either data-driven or model-driven manner were integrated in order to compensate the weakness of both methods. Finally, a full description of building outlines was accomplished by merging convex polygons, which were obtained as a building region was hierarchically divided by the extracted lines using the Binary Space Partitioning (BSP) tree. The system performance was evaluated by objective evaluation metrics in comparison to the Ordnance Survey's MasterMap®. This evaluation showed the delineation performance of up to 0.11 (the branching factor) and the detection percentage of 90.1% (the correctness) and the overall quality of 80.5%. Copyright ISPRS Numéro de notice : A2007-214 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.01.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.01.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28577 [article]

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081-07031	SL	Revue	Centre de documentation	Revues en salle	Disponible

An automatic approach for camera calibration from vanishing points / L. Grammatikopoulos in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 1 (May 2007)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 62 n° 1 (May 2007) . - pp 64 - 76 Titre : An automatic approach for camera calibration from vanishing points Type de document : Article/Communication Auteurs : L. Grammatikopoulos, Auteur ; G.E. Karras, Auteur ; E. Petsa, Auteur Année de publication : 2007 Article en page(s) : pp 64 - 76 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] compensation par faisceaux [Termes IGN] étalonnage de chambre métrique [Termes IGN] orientation interne [Termes IGN] point de fuite Résumé : (Auteur) Camera calibration is a fundamental task in photogrammetry and computer vision. This paper presents an approach for the automatic estimation of interior orientation from images with three vanishing points of orthogonal directions. Extraction of image line segments and their clustering into groups corresponding to three dominant vanishing points are performed without any human interaction. Camera parameters (camera constant, location of principal point, and two coefficients of radial lens distortion) and the vanishing points are estimated in a one-step adjustment of all participating image points. The approach may function in a single image mode, but is also capable of handling input from independent images (i.e. images not necessarily of the same object) with three and/or two vanishing points in a common solution. The reported experimental tests indicate that, within certain limits, results from single images compare satisfactorily with those from multi-image bundle adjustment. Copyright ISPRS Numéro de notice : A2007-215 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.02.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.02.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28578 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-07031	SL	Revue	Centre de documentation	Revues en salle	Disponible