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Uncertainty assessment of optical distance measurements at micrometer level accuracy for long-range applications / Joffray Guillory in IEEE Transactions on Instrumentation and Measurement, vol 68 n° 6 (June 2019)
[article]
Titre : Uncertainty assessment of optical distance measurements at micrometer level accuracy for long-range applications Type de document : Article/Communication Auteurs : Joffray Guillory, Auteur ; Maylis Teyssendier de la Serve , Auteur ; Daniel Truong, Auteur ; Christophe Alexandre, Auteur ; Jean-Pierre Wallerand, Auteur Année de publication : 2019 Projets : 2-Pas d'info accessible - article non ouvert / Article en page(s) : pp 2260 - 2267 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] distancemètre
[Termes IGN] incertitude géométrique
[Termes IGN] instrument de mesurage de distances
[Termes IGN] mesurage électronique de distances
[Termes IGN] télémètre laserRésumé : (auteur) We have developed a transportable distance meter based on a 1550-nm laser diode, that is, intensity modulated at 5 GHz. This fiber-based prototype is realized using telecommunication components that are reliable, largely available, and affordable. We have identified and quantified the different sources of error when measuring with this technique a distance between two positions of the same reflector. Minimizing these errors and evaluating their uncertainties lead to a global uncertainty of 4 μm (k = 1) up to 1 km. This value does not include the additional errors caused by the evaluation of the atmospheric parameters. This uncertainty has then been verified over 100 m by comparison with an optical interferometer. The prototype was also tested outdoors over 5.4 km and has shown a resolution of 25 μm for an integration time of 10 ms. Distance measurements for long distances with this prototype are still limited by the air refractive index effect. Nevertheless, we have demonstrated that the uncertainty on optical distances reached with this simple technique is compatible with the future development of a two-wavelength system with air index compensation. Numéro de notice : A2019-279 Affiliation des auteurs : Géodésie+Ext (mi2018-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TIM.2019.2902804 Date de publication en ligne : 03/04/2019 En ligne : https://doi.org/10.1109/TIM.2019.2902804 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95416
in IEEE Transactions on Instrumentation and Measurement > vol 68 n° 6 (June 2019) . - pp 2260 - 2267[article]Challenges in grassland mowing event detection with multimodal Sentinel images / Anatol Garioud (2019)
Titre : Challenges in grassland mowing event detection with multimodal Sentinel images Type de document : Article/Communication Auteurs : Anatol Garioud , Auteur ; Sébastien Giordano , Auteur ; Silvia Valero, Auteur ; Clément Mallet , Auteur Editeur : Saint-Mandé : Institut national de l'information géographique et forestière - IGN (2012-) Année de publication : 2019 Projets : 2-Pas d'info accessible - article non ouvert / Conférence : MultiTemp 2019, 10th International Workshop on the Analysis of Multitemporal Remote Sensing Images 05/08/2019 07/08/2019 Shanghai Chine Proceedings IEEE Importance : pp 1 - 4 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image mixte
[Termes IGN] apprentissage profond
[Termes IGN] détection d'événement
[Termes IGN] données lidar
[Termes IGN] image multibande
[Termes IGN] image RapidEye
[Termes IGN] image Sentinel-MSI
[Termes IGN] image Sentinel-SAR
[Termes IGN] image TerraSAR-X
[Termes IGN] méthode robuste
[Termes IGN] nébulosité
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] Perceptron multicouche
[Termes IGN] prairie
[Termes IGN] régression
[Termes IGN] réseau neuronal récurrent
[Termes IGN] série temporelle
[Termes IGN] surveillance de la végétationRésumé : (auteur) Permanent Grasslands (PG) are heterogeneous environments with high spatial and temporal dynamics, subject to increasing environmental challenges. This study aims to identify requirements, key constraining factors and solutions for robust and complete detection of Mowing Events. Remote sensing is a powerful tool to monitor and investigate Near-Real-Time and seasonally PG cover. Here, pros and cons of Sentinel-2 (S2) and Sentinel-1 (S1) time series exploitation for Mowing Events (MowEve) detection are analysed. A deep-based approach is proposed to obtain consistent and homogeneous biophysical parameter times series for MowEve detection. Recurrent Neural Networks are proposed as regression strategy allowing the synergistic integration of optical and Synthetic Aperture Radar data to reconstruct dense NDVI times series. Experimental results corroborates the interest of deriving consistent and homogeneous series of biophysical parameters for subsequent MowEve detection. Numéro de notice : C2019-028 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Autre URL associée : vers HAL Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/Multi-Temp.2019.8866914 Date de publication en ligne : 29/11/2019 En ligne : https://doi.org/10.1109/Multi-Temp.2019.8866914 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94538
Titre : Piecewise horizontal 3D roof reconstruction from aerial Lidar Type de document : Article/Communication Auteurs : Slim Namouchi, Auteur ; Bruno Vallet , Auteur ; Imed Riadh Farah, Auteur ; Haythem Ismail, Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2019 Projets : 2-Pas d'info accessible - article non ouvert / Conférence : IGARSS 2019, IEEE International Geoscience And Remote Sensing Symposium 28/07/2019 02/08/2019 Yokohama Japon Proceedings IEEE Importance : pp 8992 - 8995 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] aide à la décision
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] extraction de points
[Termes IGN] image RVB
[Termes IGN] planification urbaine
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] reconstruction d'image
[Termes IGN] semis de points
[Termes IGN] toit
[Termes IGN] ville intelligenteRésumé : (auteur) 3D urban models provide convincing analytic tools for decision making, city planning, and smart city services. However, developing a fully automated method that can produce 3D building models of high quality, fidelity and accuracy is still a challenging task. Currently, most of the proposed approaches handle polyhedral roofs (consisting of planar polygons) because they assume that all roofs in a single area follow this prior. However, the reconstruction method could have its prior adapted to the roof type. In this paper, we are dealing with a specific roof case which is piecewise horizontal roofs which are very frequent in most countries of North Africa and in particular in Tunisia. Our building reconstruction method follows four main steps: building LiDAR points extraction, piecewise horizontal roof clustering, boundary creation and 3D geometric modeling. In order to prove the suitability and the effectiveness of the introduced method, experiments are conducted with real LiDAR data and aerial RGB image. Numéro de notice : C2019-038 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/IGARSS.2019.8898650 Date de publication en ligne : 14/11/2019 En ligne : https://doi.org/10.1109/IGARSS.2019.8898650 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95354
Titre : The ‘urban’ component of the French Land Data and Services Centre (Theia) Type de document : Article/Communication Auteurs : Anne Puissant, Auteur ; Arnaud Sellé, Auteur ; Nicolas Baghdadi, Auteur ; Vincent Thierion, Auteur ; Arnaud Le Bris , Auteur ; Jean-Louis Roujean, Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2019 Projets : 2-Pas d'info accessible - article non ouvert / Conférence : JURSE 2019, Joint Urban Remote Sensing Event 22/05/2019 24/05/2019 Vannes France Proceedings IEEE Importance : 4 p. Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] image aérienne
[Termes IGN] image spatialeRésumé : (auteur) The THEIA data and services centre has been created with the objective of increasing the use of space data by the scientific community and the public actors. THEIA structured the French scientific community 1) through a mutualized Service and Data Infrastructure (SDI) distributed between several centers, allowing access to a variety of products; 2) through the setup of Regional Animation Networks (RAN) to federate and animate users (scientists and public / private actors) and 3) through Scientific Expertise Centres (SEC) clustering virtual research groups on a thematic domain. The research works carried out for urban studies in three SEC are presented in this paper. The works are organized around the design and development of value-added products and services. Numéro de notice : C2019-003 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/JURSE.2019.8808998 Date de publication en ligne : 22/08/2019 En ligne : https://doi.org/10.1109/JURSE.2019.8808998 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92208 The impact of rainfall distribution patterns on hydrological and hydraulic response in arid regions: case study Medina, Saudi Arabia / Mohamed Abdulrazzak in Arabian Journal of Geosciences, vol 11 n° 21 (November 2018)
[article]
Titre : The impact of rainfall distribution patterns on hydrological and hydraulic response in arid regions: case study Medina, Saudi Arabia Type de document : Article/Communication Auteurs : Mohamed Abdulrazzak, Auteur ; Amro Elfeki, Auteur ; Ahmed Samy Kamis, Auteur ; Mostafa Kassab, Auteur ; Nassir Alamri, Auteur ; Kashif Noor, Auteur ; Anis Chaabani , Auteur Année de publication : 2018 Projets : 2-Pas d'info accessible - article non ouvert / Article en page(s) : n° 679 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Arabie Saoudite
[Termes IGN] inondation
[Termes IGN] Médine
[Termes IGN] modèle hydrographique
[Termes IGN] précipitation
[Termes IGN] zone arideRésumé : (auteur) Rainfall distribution patterns (RDPs) are crucial for hydrologic design. Hydrologic modeling is based on Soil Conservation Services (SCS) type RDPs (SCS type I, IA, II, and III). SCS type II method is widely used by hydrologists in arid regions. These RDPs were designed for the USA and similar temperate regions. There is no scientific justification for using SCS type II method in arid regions. The consequences of using SCS type II have impacts on the hydrologic and hydraulic modeling studies. The current paper investigates the validity of the SCS type II and in arid regions. New temporal RDPs were applied and compared with SCS type II RDPs. The produced peak discharges, volumes, maximum inundation depths, top widths, and velocities from both approaches were analyzed. An application is made on the protection channel in Taibah and Islamic Universities campuses in Medina, Saudi Arabia. A methodology was followed which included frequency analysis, catchment modeling, hydrological modeling, and hydraulic modeling. Results indicated that there are considerable consequences on infrastructural design, and hydrologic and hydraulic parameters if inappropriate RDPs are used. The investigation confirmed that the SCS type RDPs do not reflect the actual flood features in arid regions. Numéro de notice : A2018-668 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s12517-018-4043-z Date de publication en ligne : 08/11/2018 En ligne : http://dx.doi.org/10.1007/s12517-018-4043-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94265
in Arabian Journal of Geosciences > vol 11 n° 21 (November 2018) . - n° 679[article]All-sky search for long-duration gravitational wave transients in the first Advanced LIGO observing run / B.P. Abbott in Classical and Quantum Gravity, vol 35 n° 6 (March 2018)PermalinkComparative study of visual saliency maps in the problem of classification of architectural images with Deep CNNs / Abraham Montoya Obeso (2018)PermalinkDecision fusion of SPOT6 and multitemporal Sentinel2 images for urban area detection / Cyril Wendl (2018)PermalinkDomain adaptation for large scale classification of very high resolution satellite images with deep convolutional neural networks / Tristan Postadjian (2018)PermalinkPotential and limits of Sentinel-1 data for small alpine glaciers monitoring / Matthias Jauvin (2018)PermalinkPermalinkSentinel-2 level-1 calibration and validation status from the mission performance centre / Catherine Bouzinac (2018)PermalinkA stixel approach for enhancing semantic image segmentation using prior map information / Sylvain Jonchery (2018)PermalinkPermalinkCut Pursuit: Fast algorithms to learn piecewise constant functions on general weighted graphs / Loïc Landrieu in SIAM Journal on Imaging Sciences, vol 10 n° 4 (November 2017)Permalink