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Advanced full-waveform lidar data echo detection: assessing quality of derived terrain and tree height models in an alpine coniferous forest / Adrien Chauve in International Journal of Remote Sensing IJRS, vol 30 n° 19 (October 2009)
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Titre : Advanced full-waveform lidar data echo detection: assessing quality of derived terrain and tree height models in an alpine coniferous forest Type de document : Article/Communication Auteurs : Adrien Chauve , Auteur ; Cédric Vega , Auteur ; Sylvie Durrieu, Auteur ; Tristan Allouis, Auteur ; William Puech, Auteur ; Frédéric Bretar, Auteur ; Marc Pierrot-Deseilligny , Auteur Année de publication : 2009 Projets : TOSCA ExFOLIO / Durrieu, Sylvie Conférence : ForestSat 2007, forests and remote sensing : methods and operational tools 05/11/2007 07/11/2007 Montpellier France Article en page(s) : pp 5211 - 5228 Note générale : Bibliographie
This work is part of the ExFOLIO project and was realized thanks to the financial support of the CNES (Centre National d’Etudes Spatiales).Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] Alpes (France)
[Termes IGN] canopée
[Termes IGN] détection du signal
[Termes IGN] données lidar
[Termes IGN] hauteur des arbres
[Termes IGN] lidar à retour d'onde complète
[Termes IGN] modèle de Gauss-Markov
[Termes IGN] modèle numérique de sursol
[Termes IGN] modèle numérique de terrain
[Termes IGN] Pinus nigra
[Termes IGN] semis de points
[Termes IGN] signal laser
[Termes IGN] télémètre laser aéroporté
[Termes IGN] transformation en ondelettesRésumé : (Auteur) Small footprint full-waveform airborne lidar systems offer large opportunities for improved forest characterization. To take advantage of full-waveform information, this paper presents a new processing method based on the decomposition of waveforms into a sum of parametric functions. The method consists of an enhanced peak detection algorithm combined with advanced echo modelling including Gaussian and generalized Gaussian models. The study focuses on the qualification of the extracted geometric information. Resulting 3D point clouds were compared to the point cloud provided by the operator. 40 to 60% additional points were detected mainly in the lower part of the canopy and in the low vegetation. Their contribution to Digital Terrain Models (DTMs) and Canopy Height Models (CHMs) was then analysed. The quality of DTMs and CHM-based heights was assessed using field measurements on black pine plots under various topographic and stand characteristics. Results showed only slight improvements, up to 5 cm bias and standard deviation reduction. However both tree crowns and undergrowth were more densely sampled thanks to the detection of weak and overlapping echoes, opening up opportunities to study the detailed structure of forest stands. Numéro de notice : A2009-380 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160903023009 Date de publication en ligne : 22/09/2009 En ligne : https://doi.org/10.1080/01431160903023009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30010
in International Journal of Remote Sensing IJRS > vol 30 n° 19 (October 2009) . - pp 5211 - 5228[article]Exemplaires (1)
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Advanced full-waveform lidar data echo detection ... - preprintAdobe Acrobat PDF Fullanalyze : a research tool for handling, processing and analyzing full-waveform Lidar data / Adrien Chauve (2009)
Titre : Fullanalyze : a research tool for handling, processing and analyzing full-waveform Lidar data Type de document : Article/Communication Auteurs : Adrien Chauve , Auteur ; Sylvie Durrieu, Auteur ; William Puech, Auteur ; Frédéric Bretar, Auteur ; Marc Pierrot-Deseilligny , Auteur Editeur : Saint-Mandé : Institut Géographique National - IGN (2008-2011) Année de publication : 2009 Conférence : IGARSS 2009, International Geoscience And Remote Sensing Symposium 12/07/2009 17/07/2009 Le Cap Afrique du sud Proceedings IEEE Importance : 4 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] lidar à retour d'onde complète
[Termes IGN] semis de points
[Termes IGN] signal laser
[Termes IGN] signal lidar
[Termes IGN] traitement du signal
[Termes IGN] visualisation 3DRésumé : (Auteur) Full-waveform (FW) lidar systems provide range profiles of the Earth topography. They are acquired from airborne platforms or from satellites. Many applications derive from the use of such data, from the extraction of 3D point clouds to the inversion of vegetation profiles. Nevertheless, handling range profiles is much more difficult than handling 3D point cloud. The aim of this paper is to present a research tool based on opensource libraries that can process and visualize such data. We focused our work on the implementation on the 2D/3D interface that gives the possibility to visualize the interaction between the lidar electromagnetic waves and the Earth topography. Moreover, this tool integrates several processing steps of FW Lidar data. Numéro de notice : C2009-026 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/IGARSS.2009.5417508 Date de publication en ligne : 18/02/2010 En ligne : https://doi.org/10.1109/IGARSS.2009.5417508 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64290 Documents numériques
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Fullanalyze : a research tool ... - pdf auteurAdobe Acrobat PDF
contenu dans Proceedings of the ISPRS Workshop 'Laser Scanning 2007 and SilviLaser 2007' September 12-14, 2007 Espoo, Finland / Petri Rönnholm (2007)
Titre : Processing full-waveform lidar data: modeling raw signals Type de document : Article/Communication Auteurs : Adrien Chauve , Auteur ; Clément Mallet , Auteur ; Frédéric Bretar, Auteur ; Sylvie Durrieu, Auteur ; Marc Pierrot-Deseilligny , Auteur ; William Puech, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2007 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 Conférence : ISPRS 2007, Workshop Laser Scanning and Silvilaser 12/09/2007 14/09/2007 Espoo Finlande OA Proceedings Importance : pp 102 -107 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] algorithme de Gauss
[Termes IGN] forme d'onde pleine
[Termes IGN] Lidar
[Termes IGN] semis de points
[Termes IGN] signal lidar
[Termes IGN] traitement du signalRésumé : (auteur) Unlike airborne multi-echo laser scanner systems, full-waveform systems are able to digitize and record the entire backscattered signal of each laser pulse. It has been demonstrated that decomposing the return waveforms into a mixture of Gaussian components was suitable. In this paper, we focus on the improvement of peak detection and of raw signal modelling. Refined peak detection greatly increased the number of detected targets as well as their positional accuracy. Models more complex than the Gaussian model, such as the Lognormal or generalized Gaussian functions, were introduced and their contribution to waveform processing was studied. In this way, fitting of asymmetric, peaked or flattened echoes located both in urban and forested areas could be improved. Moreover, introduction of new echo parameters allowed the extraction of additional information on the target shape. This should make easier the decorrelation of geometric and radiometric influences on the signal and, as a consequence, the improvement of point cloud classification algorithms. Numéro de notice : C2007-012 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/3-W52/final_papers/Chauve_2007.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83560 Documents numériques
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Processing full-waveform lidar dataAdobe Acrobat PDF