Descripteur
Documents disponibles dans cette catégorie (737)
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
Aux origines de la 3D / Michel Ravelet in Géomètre, n° 2092 (mai 2012)
[article]
Titre : Aux origines de la 3D Type de document : Article/Communication Auteurs : Michel Ravelet, Auteur Année de publication : 2012 Article en page(s) : pp 18 - 19 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] Ardèche (07)
[Termes IGN] grotte
[Termes IGN] image terrestre
[Termes IGN] modélisation 3D
[Termes IGN] photogrammétrie numérique
[Termes IGN] photogrammétrie terrestre
[Termes IGN] reconstruction 3D
[Termes IGN] texturageRésumé : (Auteur) Quand la mesure du géomètre-expert se met au service de la science, l'anamorphose de la grotte Chauvet donne un résultat époustouflant. Numéro de notice : A2012-188 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31635
in Géomètre > n° 2092 (mai 2012) . - pp 18 - 19[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 063-2012051 RAB Revue Centre de documentation En réserve L003 Disponible Urban tree cover mapping with relief-corrected aerial imagery and lidar / B. Lehrbass in Photogrammetric Engineering & Remote Sensing, PERS, vol 78 n° 5 (May 2012)
[article]
Titre : Urban tree cover mapping with relief-corrected aerial imagery and lidar Type de document : Article/Communication Auteurs : B. Lehrbass, Auteur ; Jing Wang, Auteur Année de publication : 2012 Article en page(s) : pp 473 - 484 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] arbre (flore)
[Termes IGN] arbre urbain
[Termes IGN] carte de la végétation
[Termes IGN] classification orientée objet
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] flore urbaine
[Termes IGN] fusion d'images
[Termes IGN] image aérienne
[Termes IGN] modèle numérique de surface
[Termes IGN] Ontario (Canada)
[Termes IGN] orthoimage
[Termes IGN] précision de la classification
[Termes IGN] zone urbaineRésumé : (Auteur) Urban tree canopy cover is often mapped by classifying high-resolution multispectral imagery. However, it can be difficult to differentiate low-lying vegetation from tree cover using optical data alone. Combining a lidar-derived Normalized Digital Surface Model (ndsm) improves classification accuracy, but the optical imagery is often imperfectly aligned with the NDSM. Aerial imagery is normally orthorectified using the ground elevation. However, tall objects in the orthorectified imagery still suffer from relief displacement. This can cause classification errors when lidar and the aerial imagery are combined. This study presents an approach for urban tree cover mapping composed of two parts: a method for correcting the relief displacement of trees in previously orthorectified aerial imagery, and an object-based classification method which combines relief-corrected multispectral aerial imagery with a lidar-derived NDSM. Using these methods, the tree cover was mapped for a 1,600 ha region of London, Ontario, Canada with improved positional and classification accuracy. Numéro de notice : A2012-233 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.78.5.473 En ligne : https://doi.org/10.14358/PERS.78.5.473 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31679
in Photogrammetric Engineering & Remote Sensing, PERS > vol 78 n° 5 (May 2012) . - pp 473 - 484[article]Classification of savanna tree species, in the Greater Kruger National Park region, by integrating hyperspectral and LiDAR data in a Random Forest data mining environment / Laven Naidoo in ISPRS Journal of photogrammetry and remote sensing, vol 69 (April 2012)
[article]
Titre : Classification of savanna tree species, in the Greater Kruger National Park region, by integrating hyperspectral and LiDAR data in a Random Forest data mining environment Type de document : Article/Communication Auteurs : Laven Naidoo, Auteur ; Moses Azong Cho, Auteur ; Renaud Mathieu, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 167 - 179 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] Afrique du sud (état)
[Termes IGN] arbre (flore)
[Termes IGN] classification par forêts d'arbres décisionnels
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] hauteur des arbres
[Termes IGN] image hyperspectrale
[Termes IGN] lasergrammétrie
[Termes IGN] parc naturel national
[Termes IGN] savaneRésumé : (Auteur) The accurate classification and mapping of individual trees at species level in the savanna ecosystem can provide numerous benefits for the managerial authorities. Such benefits include the mapping of economically useful tree species, which are a key source of food production and fuel wood for the local communities, and of problematic alien invasive and bush encroaching species, which can threaten the integrity of the environment and livelihoods of the local communities. Species level mapping is particularly challenging in African savannas which are complex, heterogeneous, and open environments with high intra-species spectral variability due to differences in geology, topography, rainfall, herbivory and human impacts within relatively short distances. Savanna vegetation are also highly irregular in canopy and crown shape, height and other structural dimensions with a combination of open grassland patches and dense woody thicket – a stark contrast to the more homogeneous forest vegetation. This study classified eight common savanna tree species in the Greater Kruger National Park region, South Africa, using a combination of hyperspectral and Light Detection and Ranging (LiDAR)-derived structural parameters, in the form of seven predictor datasets, in an automated Random Forest modelling approach. The most important predictors, which were found to play an important role in the different classification models and contributed to the success of the hybrid dataset model when combined, were species tree height; NDVI; the chlorophyll b wavelength (466 nm) and a selection of raw, continuum removed and Spectral Angle Mapper (SAM) bands. It was also concluded that the hybrid predictor dataset Random Forest model yielded the highest classification accuracy and prediction success for the eight savanna tree species with an overall classification accuracy of 87.68% and KHAT value of 0.843. Numéro de notice : A2012-199 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.03.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.03.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31646
in ISPRS Journal of photogrammetry and remote sensing > vol 69 (April 2012) . - pp 167 - 179[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2012031 SL Revue Centre de documentation Revues en salle Disponible Road network extraction in suburban areas / A. Grote in Photogrammetric record, vol 27 n° 137 (March - May 2012)
[article]
Titre : Road network extraction in suburban areas Type de document : Article/Communication Auteurs : A. Grote, Auteur ; Christian Heipke, Auteur ; Franz Rottensteiner, Auteur Année de publication : 2012 Article en page(s) : pp 8 - 28 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] banlieue
[Termes IGN] classification à base de connaissances
[Termes IGN] cohérence géométrique
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] extraction du réseau routier
[Termes IGN] image infrarouge couleur
[Termes IGN] réseau routierRésumé : (Auteur) In this paper, an algorithm for the extraction of road networks in suburban areas is presented. The algorithm is region-based and uses high-resolution colour infrared images as well as, optionally, a digital surface model (DSM). The road extraction starts with a segmentation using the normalised cuts algorithm; afterwards the segments are grouped. Road sections are extracted from the grouped segments. Road sections that are likely to belong to the same road are connected to subgraphs in the next step. To eliminate false connections in the subgraphs, context objects such as vehicles, buildings and trees are employed. The remaining road strings, represented by their centre lines, are connected to a road network. The process employs combinations of radiometric and geometric features, derived from knowledge about the appearance of roads in suburban areas. Results are presented for two test data-sets, acquired by different sensors. A quantitative analysis is performed for the quality of the road extraction as well as the topological quality of the extracted network. Numéro de notice : A2012-128 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00670.x Date de publication en ligne : 14/03/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00670.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31576
in Photogrammetric record > vol 27 n° 137 (March - May 2012) . - pp 8 - 28[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 106-2012011 RAB Revue Centre de documentation En réserve L003 Disponible Ableitung von Bewegungsstrategien zur automatisierten, vollständigen Vermessung von Innerraumszenen auf autonom navigierender Plattform / Alexander Fietz (2012)
Titre : Ableitung von Bewegungsstrategien zur automatisierten, vollständigen Vermessung von Innerraumszenen auf autonom navigierender Plattform Titre original : [Détournement (ou dérivation) de stratégies de mouvement pour la mesure complète et automatisée de scènes spatiales intérieures sur la plate-forme de navigation autonome] Type de document : Thèse/HDR Auteurs : Alexander Fietz, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2012 Collection : DGK - C Sous-collection : Dissertationen num. 685 Importance : 164 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5097-6 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] bloc photo
[Termes IGN] caméra numérique
[Termes IGN] compensation par faisceaux
[Termes IGN] données lidar
[Termes IGN] données localisées 2D
[Termes IGN] données localisées 3D
[Termes IGN] lasergrammétrie
[Termes IGN] photogrammétrie terrestre
[Termes IGN] plateforme
[Termes IGN] positionnement en intérieur
[Termes IGN] reconstruction 3D
[Termes IGN] robot
[Termes IGN] segment de droite
[Termes IGN] semis de points
[Termes IGN] système de numérisation mobile
[Termes IGN] tachéomètre électronique
[Termes IGN] varianceRésumé : (Auteur) A fundamental task of an autonomous mobile robot is the ability of self-localization in its environment respectively in a map of it, available to the robot. Many applications require a localization that is as precise as possible. Thereby, a decisive factor is the accuracy but also the completeness of the map. The generated map can usually be seen as a necessary side-product. When considered from a surveying point of view, it is brought more into focus. The question is to what extent the spatial robot data can fulfill certain mapping requirements in terms of accuracy and completeness in a detailed enough manner to be useful to human users. Precise models of indoor environments are very useful in both public and private sectors. But since their procurement involves a great deal of effort, an automatical generation of indoor models is desirable.
The following thesis should make a contribution to this and tries to compose the techniques that are necessary to deliver interior models at the push of a button. Therefore, a mobile measuring system was designed, that is able to carry out complete and precise measurements of indoor environments. The system was build up in two stages. A mobile platform is equipped with a low-cost laser scanner in the basic stage. This build-up allows a precise exploration of indoor scenes in 2D. In an expansion stage the installation of a digital camera leads to an additional 3D reconstruction based on photogrammetric techniques.
The accuracy and quality of robotic mapping is primarily dependent on the sensors that are used. The software process to register the collected data in a common coordinate frame and to create a holistic map of the environment has an additional influence. In the field of scanning systems scan matching techniques or probabilistic filter approaches are used. In the case of 3D surveying, a photogrammetric reconstruction can be done by an estimation of feature points, which are extracted from a photo block, within a bundle adjustment process. Results can be optimized, if requirements and restrictions of these techniques are regarded in the data acquisition process, when the robot proceeds the exploration. A crucial aspect is the spatial sensor placement at a certain point of time in this process. In the field of robotics, sensor placement is controlled by positioning strategies, which normally are of overriding importance to all other processes. The majority of known positioning strategies have the primary aim to optimize the efficiency of the exploration, so that every measurement provides as much new spatial information as possible. Requirements of the data registration technique are neglected in contrast. This thesis presents positioning strategies for scanning 2D measurements as well as photogrammetric 3D measurements, which try to maximize the accuracy of the collected spatial data. A scanning 2D measuring system, which is able to explore previously unknown indoor environments and generate precise floor plans is presented in the first part of this thesis. The system iteratively visits measurement poses defined by a positioning strategy. 2D point clouds, collected at various positions, are transformed into a common coordinate system by the use of a scan matching technique. The latter takes advantage of the characteristic manifestation of office environments and extracts planar segments from the measured point clouds. Minimizing the sum of perpendicular distances to these segments, points of a new scan are transformed into the existing coordinate system with high accuracy. Precision and robustness are improved through iterative parameter refinement. The measuring system uses a positioning strategy, which is based on the global assumption that the environment can be described as a collection of line segments. Since segment ends indicate data gaps, exploration is pushed until their observation is complete. All accessible measuring positions, represented in an occupancy grid, are evaluated in terms of their explorative benefit by the strategy using a cost function. Exploration is stopped as soon as every section is observed with a desired resolution.
The second part of this work presents a positioning strategy to enable the recording of photo blocks that are suitable for a photogrammetric reconstruction. In the run-up of data acquisition possible pose configurations are determined using accuracy estimation. The assumption of plain environments allows a limitation to a 2D search problem regarding the choice of possible camera poses, whereby the combinatorial variety is reduced. Initial information of pose estimation provides a 2D map, generated by the system structure that was presented in the first part of this work. For predefined sections of the environment, pseudo-random pose constellations are derived iteratively from the map and compared with each other using a cost function. The cost function helps to predict the variances resulting from a bundle adjustment. Therefore the functional model of the bundle adjustment has to be projected on the R2 in a way that a geodetic network consisting of direction measurements remains. The size and the shape of the resulting error ellipses allow conclusions and a comparative consideration regarding the quality of camera pose candidates.
An essential part of the work is the empirical analysis of the systems, to evaluate their performance and the quality of the resulting spatial data. Various experiments in real indoor environments show that developed measurement methods can be applied in practice. In different sets of experiments initial conditions are varied to find out their influence on the measurement process or the result. In order to achieve reliable results, reference models of the experimental environments were created by the use of a total station.
In the case of scanner measurements, experiments show that the developed system is able to explore and measure also complex interiors. An examination of the point clouds show that the achieved accuracy comes up with surveying demands. On this issue, the presented technique outplays conventional measuring equipment. However, additional modeling shows that mainly fine structures of the environment are displayed wrongly or are even lost completely. Also the 3D measuring strategy is demonstrably superior to existing techniques. The purely passive technique leads to sparse point clouds, not dense enough to derive detailed environment models with the corresponding software.Numéro de notice : 14621 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère DOI : sans En ligne : https://www.ifp.uni-stuttgart.de/dokumente/Dissertationen/diss-fietz-c-685.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62672 De l'acquisition 3D à la réalité augmentée : le cas de l'église de la Chartreuse pontificale de Villeneuve-lès-Avignon (Gard) / Aurélie Favre-Brun in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkL'apport de la 3D dans l'art préhistorique: analyse et restitution des images et de leurs supports, exemples croisés des sites de Blanchard (La Garenne) et la Marche / Eric Robert in Archeologia e Calcolatori, Supplement 3 (2012)PermalinkAutomated detection of prehistorical rock art features aided by TLS and 2D data co-registration / Jean-Baptiste Lamontre (2012)PermalinkCaractérisation sémantique de numérisations 3D d'objets architecturaux : Une piste de recherche entre "complexité" et "intelligibilité" / David Lo Buglio (2012)PermalinkLa citerne El-Nabih à Alexandrie : Un exemple d'utilisation de la photogrammétrie, de la lasergrammétrie et du modèle 3D sur un chantier de fouille archéologique / Laurent Borel in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkGeometrische und stochastische Modelle zur Verarbeitung von 3D-Kameradaten am Beispiel menschlicher Bewegungsanalysen / Patrick Westfeld (2012)PermalinkModeling and Simulation in Engineering, ch. 1. Image-laser fusion for in situ 3D modeling of complex environments: A 4D panoramic-driven approach / Daniela Craciun (2012)PermalinkPermalinkPhotogrammétrie et photographies : des outils complémentaires pour la reconstitution numérique du patrimoine. L'exemple de la modélisation des toits de deux bâtiments de terre de la ville de Bam (Iran) / Olivier Bouet in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkPhotogrammétrie pour la recherche architecturale : vingt ans d'expérience à l'école d'études arabes / Antonio Almagro in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)Permalinkn° 196 - Janvier 2012 - Photogrammétrie au service des archéologues et des architectes, [actes], Villeneuve-lès-Avignon, 9 - 10 sptembre 2010 (Bulletin de Revue Française de Photogrammétrie et de Télédétection) / Société française de photogrammétrie et de télédétectionPermalinkDes techniques pour analyser le patrimoine archéologique monumental : Le cas du temple d'Opet à Karnak / Emmanuel Laroze in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkPermalinkValorisation numérique du théâtre gallo-romain de Mandeure / Emmanuel Alby in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkAutomatic roof model reconstruction from ALS data and 2D ground plans based on side projection and the TMR [TIN-Merging and Reshaping] algorithm / J. Rau in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 supplement (December 2011)PermalinkData fusion of extremely high resolution aerial imagery and LiDAR data for automated railroad centre line reconstruction / R. Beger in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 supplement (December 2011)PermalinkEvaluation de l'érosion du site de Wankama (Niger) par comparaison de différents MNT / T. Gendre in XYZ, n° 129 (décembre - février 2011)PermalinkFusion 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)PermalinkInvestigation of UAV systems and flight modes for photogrammetric applications / Henri Eisenbeiss in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)PermalinkPhotogrammetric techniques for voxel-based flow velocity field measurement / Patrick Westfeld in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)PermalinkReview of geometric and radiometric analyses of paintings / Fabio Remondino in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)PermalinkSurveying and modelling the Main Spire of Milan Cathedral using multiple data sources / F. Fassi in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)PermalinkCultural heritage data acquisition and processing: a report on the ISPRS York 2011 conference / Gordon Petrie in Geoinformatics, vol 14 n° 7 (01/10/2011)PermalinkSurveying buildings: Point clouds and multi-image panoramas / Luigi Colombo in Geoinformatics, vol 14 n° 7 (01/10/2011)PermalinkExtraction des courbes de niveau cartographiques à partir d'un modèle numérique de terrain (MNT) / Kusay Jaara in Cartes & Géomatique, n° 209 (septembre 2011)PermalinkA quality prediction method for building model reconstruction using LiDAR data and topographic maps / R. You in IEEE Transactions on geoscience and remote sensing, vol 49 n° 9 (September 2011)PermalinkConception d'un MNT parisien à partir de points de nivellement / N. Cadoux in Géomatique expert, n° 81 (01/07/2011)PermalinkExperimentation of structured light and stereo vision for underwater 3D reconstruction / F. Bruno in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 4 (July - August 2011)PermalinkUser interactive multiple aerial view analysis for reconstructing a large number of 3D architectural models / S. Lee in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 4 (July - August 2011)PermalinkEvolutions récentes en photogrammétrie et modélisation 3D par photo des milieux naturels / Marc Pierrot-Deseilligny in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkLa fabuleuse histoire de la Tête de Maori de Rouen et sa numérisation / S. Varea in XYZ, n° 127 (juin - août 2011)PermalinkImage matching and surface registration for 3D reconstruction of a scoliotic torso / I. Detchev in Geomatica, vol 65 n° 2 (June 2011)PermalinkTopographie, représentation et analyse morphologique 3D de drains, de conduits et de parois du karst / Stéphane Jaillet in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkExtraction of cartographic contour lines using digital terrain Model (DTM) / Kusay Jaara in Cartographic journal (the), vol 48 n° 2 (May 2011)PermalinkLe premier forum de la charte d'éthique de la 3D / Anonyme in Géomatique expert, n° 80 (01/05/2011)PermalinkAcquisition of the 3D boundary of the Triglav glacier from archived non-metric panoramic images / Mihaela Triglav Cekada in Photogrammetric record, vol 26 n° 133 (March - May 2011)PermalinkCity model enrichment / P. Smart ; J. Quinn ; C. Jones in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 2 (March - April 2011)PermalinkImagina 2011 : l'édition de l'internationalisation et le lancement de "Territoires 3D" / Jean-Pierre Maillard in XYZ, n° 126 (mars - mai 2011)PermalinkMinimising systematic error surfaces in digital elevation models using oblique convergent imagery / R. Wackrow in Photogrammetric record, vol 26 n° 133 (March - May 2011)Permalink3D City Models: Supporting Tool for Urban Planning and Design / E. Parmehr in GIM international, vol 25 n° 2 (February 2011)PermalinkPermalinkPermalinkGenerating virtual 3D model of urban street facades by fusing terrestrial multi-source data / Karim Hammoudi (2011)PermalinkRelevance of airborne lidar and multispectral image data for urban scene classification using random forests / Li Guo in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 1 (January - February 2011)PermalinkPermalink