Descripteur
Termes IGN > mathématiques > géométrie > figure géométrique > ligne (géométrie)
ligne (géométrie) |
Documents disponibles dans cette catégorie (230)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Robust reconstruction of building models from three-dimensional line segments / Jiann-Yeou Rau in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 2 (February /2003)
[article]
Titre : Robust reconstruction of building models from three-dimensional line segments Type de document : Article/Communication Auteurs : Jiann-Yeou Rau, Auteur ; L.C. Chen, Auteur Année de publication : 2003 Article en page(s) : pp 181 - 188 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] automatisation
[Termes IGN] contour
[Termes IGN] extraction semi-automatique
[Termes IGN] méthode robuste
[Termes IGN] niveau du sol
[Termes IGN] primitive volumique
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segment de droiteRésumé : (Auteur) This paper presents a novel method for semiautomatically constructing building models from photogrammetric 3D line segments of buildings, i.e., their roof edges. The method, which we call "Split MergeShape" (SMS), can treat both complete line segments as well as incomplete line segments due to image occlusions. The proposed method is comprised of five major parts: (1) the creation of the Region of Interest (ROI) and preprocessing, (2) splitting the model by using the 3D line segments to construct a combination of roof primitives, (3) merging connected roof primitives to complete the boundary of each building, (4) shaping each building rooftop by connected coplanar analysis and coplanar fitting, and (5) quality assurance. The experimental results indicate that the proposed method can soundly rebuild the topology from the 3D line segments and reconstruct building models with up to a 98 percent success rate. The proposed SMS method has been proved reliable and effective, with a high degree of automation, even when groups of connected buildings or complex types of buildings are processed. Numéro de notice : A2003-013 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.2.181 En ligne : https://doi.org/10.14358/PERS.69.2.181 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22311
in Photogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 2 (February /2003) . - pp 181 - 188[article]Cours de géodésie / Françoise Duquenne (2003)Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 14667-02 30.00 Livre Centre de documentation Géodésie Disponible 14667-01 30.00 Livre Centre de documentation Géodésie Disponible
Titre : Reconstruction of 3D building models from aerial images and maps Type de document : Monographie Auteurs : I. Süveg, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2003 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 53 Importance : 143 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-280-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] arbre de décision
[Termes IGN] base de données urbaines
[Termes IGN] bibliothèque de formes
[Termes IGN] contour
[Termes IGN] fusion de données
[Termes IGN] image aérienne
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] modélisation 3D
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segmentation
[Termes IGN] zone urbaineIndex. décimale : 33.30 Photogrammétrie numérique Résumé : (Auteur) The 3D reconstruction of buildings has numerous applications in areas that include urban planning, construction, environment, communication, transportation, energy and property management, tourism, and virtual tours of cities. In this thesis, the reconstruction of 3D building models from aerial images is addressed. The approach presented in this thesis integrates the aerial images analysis with information from a GIS database and domain knowledge.
The problem of automatic 3D building reconstruction has been a central research topic in computer vision and image understanding communities as well as in digital photogrammetry for many years. A variety of approaches has been suggested for the reconstruction of buildings from aerial images. Despite considerable research effort, there is no complete system that can reliably perform autonomous 3D building reconstruction in a wide variety of scene domains. This is particularly true in complex urban areas containing buildings with different shapes and roof types as well as in complicated underlying terrain. Of course, some progress has been made, but there is room for improvement. This improvement can be achieved by fusing multiple data sources and some a priori information.
In this project, largescale 2D GIS databases were used as additional information source. Combination of image data and map data turned out to improve the reliability of the reconstruction. Generic knowledge about the shape of the buildings is also incorporated in the system. Since most buildings can be described as an aggregation of simple building types, the knowledge about the problem domain can be represented in a building library containing simple building models. Therefore, a building library was defined containing the most common building primitives, such as flat roof, and different types of gable roofs.
The building reconstruction process was formulated as a multilevel hypothesis generation and verification scheme and it was implemented as a search tree. A method that can localize the buildings in images using map information has been developed. Also, a method for generating building hypotheses corresponding to the primitives defined in the building library has been developed. This implies stereo matching of image features (corners, lines) which correspond to map primitives and fitting of the building hypotheses to images.
A further contribution is the definition of a metric for evaluating the generated building hypotheses in order to select the one which best describes the image. The metric is based on the formulation of the mutual information between the building model and the images. Methods for the estimation of the mutual information from training samples were analyzed. This metric has been rigorously derived from information theory and does not require a priori information about the surface properties of the object and is robust with respect to variations of illumination. Also, no assumption about the shape of the objects are made. As result the method is quite general and may be used in a wide variety of applications.
The produced approach is able to meet most of the requirements of an automatic 3D building reconstruction system. The developed system has been used in urban and suburban areas to reconstruct buildings and showed good results. Experiments were carried out on two data sets with different characteristics. The system was able to reconstruct more than 80% of the buildings and the accuracy of the reconstruction is good enough for mapping purposes.Numéro de notice : 15043 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie DOI : sans En ligne : https://ncgeo.nl/downloads/53Suveg.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55049 Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 15043-02 33.30 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible 15043-01 33.30 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible DEM generation method from contour lines based on the steepest slope segment chain and a monotone interpolation function / P.O. Adriansyah in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 1-2 (November - December 2002)
[article]
Titre : DEM generation method from contour lines based on the steepest slope segment chain and a monotone interpolation function Type de document : Article/Communication Auteurs : P.O. Adriansyah, Auteur ; R. Yokoyama, Auteur Année de publication : 2002 Article en page(s) : pp 86 - 101 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Orthophotographie, orthoimage
[Termes IGN] contour
[Termes IGN] interpolation
[Termes IGN] méthode
[Termes IGN] modèle numérique de surface
[Termes IGN] pente
[Termes IGN] segment de droiteRésumé : (Auteur) In this paper, a method to generate a digital elevation model (DEM) from contour lines is proposed. The method is characterized by 16 search directions to find the steepest slope direction from a grid point to the nearest and second nearest contour lines, an interpolation along the steepest slope segment chain, an improved identification of slope grid points, and a monotone interpolation provided by a simple cubic Hermit function to interpolate slope grid points. Noticeable improvements are achieved in the generated DEM from the proposed method against the DEM produced by the Geological Survey Institute (GSI) of Japan. Copyright ISPRS Numéro de notice : A2002-283 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00117-X En ligne : https://doi.org/10.1016/S0924-2716(02)00117-X Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22194
in ISPRS Journal of photogrammetry and remote sensing > vol 57 n° 1-2 (November - December 2002) . - pp 86 - 101[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 081-02042 RAB Revue Centre de documentation En réserve L003 Disponible 081-02041 RAB Revue Centre de documentation En réserve L003 Disponible Detecting and measuring individual trees using an airborne laser scanner / A. Persson in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 9 (September 2002)
[article]
Titre : Detecting and measuring individual trees using an airborne laser scanner Type de document : Article/Communication Auteurs : A. Persson, Auteur ; Johan Holmgren, Auteur Année de publication : 2002 Article en page(s) : pp 925 - 932 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] arbre (flore)
[Termes IGN] contour
[Termes IGN] données lidar
[Termes IGN] erreur moyenne quadratique
[Termes IGN] forêt
[Termes IGN] houppier
[Termes IGN] télémétrie laser aéroporté
[Termes IGN] troncRésumé : (Auteur) High-resolution airborne laser scanner data offer the possibility to detect and measure individual trees. In this study, an algorithm which estimated position, height, and crown diameter of individual trees was validated with field measurements. Because all the trees in this study were measured on the ground with high accuracy, their positions could be linked with laser measurements, making validation on an individual tree basis possible. In total, 71 percent of the trees were correctly detected using laser scanner data. Because a large portion of the undetected trees had a small stem diameter, 91 percent of the total stem volume was detected. Height and crown diameter of detected trees could be estimated with a root-mean-square error (RMSE) of 0,63 m and 0,61 m, respectively. Stem diameter was estimated, using laser measured tree height and crown diameter, with an RMSE of 3,8 cm. Different laser beam diameters (0,26 to 3,68 m) were also tested, the smallest beam size showing a better detection rate in dense forest. However, estimates of tree height and crown diameter were not affected much by different beam size. Copyright ASPRS Numéro de notice : A2002-323 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/september/2002_sep_925 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22234
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 9 (September 2002) . - pp 925 - 932[article]Application of snakes and dynamic programming optimisation technique in modeling of buildings in informal settlement areas / H. Ruther in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 4 (July - August 2002)PermalinkPreserving cartographic quality in DTM interpolation from contour lines / Gil Rito-Gonçalves in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 3 (April - June 2002)PermalinkCharacterization of complex bends / Xavier Barillot (2002)PermalinkExtracting 3D edgels hypotheses from multiple calibrated images : a step towards the reconstruction of curved and straight object boundary lines / Franck Jung (2002)PermalinkRéalisation d'un système d'information géographique dédié à l'étude des déformations de surface sur la ville de Paris / J.L. Kouame (2002)PermalinkModifications of Tanaka's illuminated contour method / Patrick Kennelly in Cartography and Geographic Information Science, vol 28 n° 2 (April 2001)PermalinkDreidimensionale kinematische Modelle zur Analyse von Deformationen an Hängen / P. Rawiel (2001)PermalinkAn integrated technique for automated generalization of contour maps / Z. Li in Cartographic journal (the), vol 37 n° 1 (June 2000)PermalinkSemi-automatic contour line generation: advanced manuel editing tools for proper results / Alain Dupéret in GIM international, vol 14 n° 3 (March 2000)PermalinkPermalink