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Comparison of three algorithms for filtering airborne lidar data / K. Zhang in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 3 (March 2005)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 3 (March 2005) . - pp 313 - 324 Titre : Comparison of three algorithms for filtering airborne lidar data Type de document : Article/Communication Auteurs : K. Zhang, Auteur ; D. Whitman, Auteur Année de publication : 2005 Article en page(s) : pp 313 - 324 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] algorithme de filtrage [Termes IGN] analyse comparative [Termes IGN] données lidar [Termes IGN] filtrage numérique d'image [Termes IGN] pente Résumé : (Auteur) This paper compares three methods for removing non-ground measurements from airborne laser scanning data. These methods, including the elevation threshold with expanding window (ETEW), maximum local slope (MLS), and progressive morphological (PM) filters, analyze data points based on variations of local slope, and elevation. Low and high-relief data sets with various densities of trees, houses, and sand dunes were selected to test the filtering methods. The results show that all three methods can effectively remove most non-ground points in both low-relief urban and high-relief forested areas. The PM filter generated the best result in coastal barrier island areas, whereas the other algorithms tended to remove the tops of steep sand dunes. Each method experienced various omission or commission errors, depending on the filtering parameters. Topographic slope is the most sensitive parameter for the three filtering methods. Numéro de notice : A2005-105 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.3.313 En ligne : https://doi.org/10.14358/PERS.71.3.313 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27243 [article]

A progressive morphological filter for removing nonground measurements from airborne Lidar data / K. Zhang in IEEE Transactions on geoscience and remote sensing, vol 41 n° 4 (April 2003)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 41 n° 4 (April 2003) . - pp 872 - 882 Titre : A progressive morphological filter for removing nonground measurements from airborne Lidar data Type de document : Article/Communication Auteurs : K. Zhang, Auteur ; S.C. Chen, Auteur ; D. Whitman, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 872 - 882 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] filtre numérique [Termes IGN] modèle numérique de terrain [Termes IGN] morphologie mathématique [Termes IGN] semis de points [Termes IGN] sursol [Termes IGN] télémétrie laser aéroporté Résumé : (Auteur) Recent advances in airborne light detection and ranging (LIDAR) technology allow rapid and inexpensive measurements of topography over large areas. This technology is becoming a primary method for generating highresolution digital terrain models (DTMs) that are essential to numerous applications such as flood modeling and landslide prediction. Airborne LIDAR systems usually return a threedimensional cloud of point measurements from reflective objects scanned by the laser beneath the flight path. In order to generate a DTM, measurements from nonground features such as buildings, vehicles, and vegetation have to be classified and removed. In this paper, a progressive morphological filter was developed to detect nonground LIDAR measurements. By gradually increasing the window size of the filter and using elevation difference thresholds, the measurements of vehicles, vegetation, and buildings are removed, while ground data are preserved. Datasets from mountainous and flat urbanized areas were selected to test the progressive morphological filter. The results show that the filter can remove most of the nonground points effectively. Numéro de notice : A2003-182 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.810682 En ligne : https://doi.org/10.1109/TGRS.2003.810682 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22478 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-03041	RAB	Revue	Centre de documentation	En réserve L003	Disponible