Photogrammetric Engineering & Remote Sensing, PERS / American society for photogrammetry and remote sensing . vol 75 n° 3Paru le : 01/03/2009 ISBN/ISSN/EAN : 0099-1112 |
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Ajouter le résultat dans votre panierAssessing spatial uncertainty of LIDAR-derived building model: a case study in downtown Oklahoma city / M. Cheuk in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 3 (March 2009)
[article]
Titre : Assessing spatial uncertainty of LIDAR-derived building model: a case study in downtown Oklahoma city Type de document : Article/Communication Auteurs : M. Cheuk, Auteur ; M. Yuan, Auteur Année de publication : 2009 Article en page(s) : pp 257 - 269 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] estimation de précision
[Termes IGN] incertitude géométrique
[Termes IGN] milieu urbain
[Termes IGN] modèle numérique du bâti
[Termes IGN] Oklahoma (Etats-Unis)
[Termes IGN] reconstruction 3D du bâtiRésumé : (Auteur) Light Detection and Ranging (lidar) technology enables cost-effective rapid production of digital models that capture topography and vertical structures of surface features at a fine spatial resolution. The capability has promoted lidar applications for mapping terrain, buildings, forest stands, and coastal features that cannot be adequately captured by other remote sensing means over a large area. However, in complex terrain, lidar data and lidar-derived products may contain significant uncertainty. This research provides a simple method to assess the spatial uncertainty of lidar-derived building model, using downtown Oklahoma City, Oklahoma as an example. Results indicate that significant uncertainty could be found in urban environment where: (a) building structures are complex, (b) buildings are constructed with reflective materials, and (c) vegetation grows near-by. In addition, cities under rapid development also challenge the accuracy assessment of 3D building models. To conclude, we suggest: (a) careful pre-flight planning before data collection, (b) improve the feature extraction algorithm if possible, (c) use of other remote sensing data, and (d) accuracy assessment on suggested urban environments to reduce the spatial uncertainty of lidar data and lidar-derived products. Copyright ASPRS Numéro de notice : A2009-036 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.3.257 En ligne : https://doi.org/10.14358/PERS.75.3.257 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29666
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 3 (March 2009) . - pp 257 - 269[article]Reconstruction of complex shape building from LIDAR data using free forms surfaces / N.A. Akel in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 3 (March 2009)
[article]
Titre : Reconstruction of complex shape building from LIDAR data using free forms surfaces Type de document : Article/Communication Auteurs : N.A. Akel, Auteur ; S. Filin, Auteur ; Y. Doytsher, Auteur Année de publication : 2009 Article en page(s) : pp 271 - 280 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] détection du bâti
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] objet géographique complexe
[Termes IGN] partitionnement
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] semis de points
[Termes IGN] surface planeRésumé : (Auteur) Building reconstruction from lidar data offers promising prospects for rapid generation of large-scale 3D models autonomously. Such reconstruction requires knowledge on a variety of parameters that refer to both the point cloud and the modeled buildings. The complexity of the reconstruction task has led researchers to use external information to localize buildings and assume that they consist of only planar parts. These assumptions limit the reconstruction of complex buildings, particularly those having curved faces. We present in this paper a detection and reconstruction model that considers the point cloud as the only information source and supports the reconstruction of general shape surfaces. Nonetheless, since many of the buildings are composed of planar faces, we maintain the planar based partitioning whenever possible and model non-planar surfaces only where needed. This way, standard models are extended to support free-form roof shapes without imposing artificial models. In addition to the free-form surface extension, we demonstrate the effect of imposing geometric constraints on the reconstruction as a means to generate realistic building models. Copyright ASPRS Numéro de notice : A2009-037 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.3.271 En ligne : https://doi.org/10.14358/PERS.75.3.271 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29667
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 3 (March 2009) . - pp 271 - 280[article]An adaptive approach to topographic feature extraction from Digital Terrain Models / Y. Song in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 3 (March 2009)
[article]
Titre : An adaptive approach to topographic feature extraction from Digital Terrain Models Type de document : Article/Communication Auteurs : Y. Song, Auteur ; J. Shan, Auteur Année de publication : 2009 Article en page(s) : pp 281 - 290 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] Antarctique
[Termes IGN] carte des pentes
[Termes IGN] extraction automatique
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] modèle numérique de terrain
[Termes IGN] seuillageRésumé : (Auteur) This study presents an adaptive solution to topographic feature extraction from digital terrain model. First, a slope map is produced by the proposed slope estimator that combines the well-known D8 and finite difference methods. In the second step, the Laplacian of Gaussian (LOG) operator with multiple thresholds is applied to the resultant slope map to determine edge pixels that have local maximum curvature and maximum connectivity. The third step adopts the original and robust marching square algorithms to trace the topographic features. Modification is made to selectively introduce shoulder points according to the local topographic complexity. In comparison to the existing algorithms, the performance of the proposed adaptive marching square algorithm is evaluated in terms of precision and resolution of the extracted features. Digital terrain models over three locations in Antarctica are used for this study. It is shown overall reducing 75 percent of the shoulder points from the robust algorithm will cause 24 percent precision drop in the adaptive method. Copyright ASPRS Numéro de notice : A2009-038 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.3.281 En ligne : https://doi.org/10.14358/PERS.75.3.281 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29668
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 3 (March 2009) . - pp 281 - 290[article]Role of tie points in integrated sensor orientation for photogrammetric map compilation / Kourosh Khoshelham in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 3 (March 2009)
[article]
Titre : Role of tie points in integrated sensor orientation for photogrammetric map compilation Type de document : Article/Communication Auteurs : Kourosh Khoshelham, Auteur Année de publication : 2009 Article en page(s) : pp 305 - 312 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] erreur
[Termes IGN] espace image
[Termes IGN] GPS-INS
[Termes IGN] modélisation géométrique de prise de vue
[Termes IGN] orientation du capteur
[Termes IGN] orientation externe
[Termes IGN] point d'appui
[Termes IGN] points homologuesRésumé : (Auteur) Direct measurement of exterior orientation parameters has been a challenge in photogrammetry for many years. Direct sensor orientation using a calibrated GPS/INS system can potentially eliminate the need for ground control points and aerial triangulation, and consequently, result in a great reduction in the cost and time of aerial photogrammetry. Previous studies have shown that, compared to conventional aerial triangulation, direct sensor orientation yields larger errors in the image and object space. It has also been shown that including a number of tie points within an integrated orientation approach can result in a reduction of errors in the image space. In this paper, the influence of the number and distribution of tie points on integrated orientation is investigated. Experiments with various numbers of tie points regularly as well as randomly distributed are presented. Results indicate that an increase in the number of tie points up to one point per model results in a considerable reduction of the errors in the image space. Copyright ASPRS Numéro de notice : A2009-039 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.3.305 En ligne : https://doi.org/10.14358/PERS.75.3.305 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29669
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 3 (March 2009) . - pp 305 - 312[article]