Descripteur
Vedettes matières IGN > Acquisition d'image(s) et de donnée(s)
Acquisition d'image(s) et de donnée(s) |
Documents disponibles dans cette catégorie (1329)
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
Laser scanner in a backpack / Antero Kukko in GIM international [en ligne], vol 30 n° 1 (January 2016)
[article]
Titre : Laser scanner in a backpack Type de document : Article/Communication Auteurs : Antero Kukko, Auteur ; Harri Kaartinen, Auteur ; Juho-Pekka Virtanen, Auteur Année de publication : 2016 Article en page(s) : pp 16 - 19 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] accessibilité
[Termes IGN] données lidar
[Termes IGN] télémètre laser terrestre
[Termes IGN] télémétrie laser mobileRésumé : (éditeur) Laser scanning systems have gone through a major evolution in the past decade. After the initial breakthrough of airborne laser scanners (ALS), other types of laser scanning systems have emerged, most notably terrestrial laser scanners (TLS) and mobile laser scanners (MIS). While these three main types of Lidar systems together serve a large number of applications, none of them are optimised for fast and flexible scanning in challenging locations, rugged terrain and complicated urban structures. Personal laser scanners (PIS) fill this void and are now evolving towards compact, agile and flexible solutions for mapping complex environments. This article explains the new Akhka R2 PLS and illustrates its use in various applications. Numéro de notice : A2016-012 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79344
in GIM international [en ligne] > vol 30 n° 1 (January 2016) . - pp 16 - 19[article]Sentinel-2A image quality commissioning phase final results: geometric calibration and performances / Florie Languille (2016)
Titre : Sentinel-2A image quality commissioning phase final results: geometric calibration and performances Type de document : Article/Communication Auteurs : Florie Languille, Auteur ; Angélique Gaudel, Auteur ; Cécile Dechoz, Auteur ; Daniel Greslou, Auteur ; Françoise de Lussy, Auteur ; Thierry Trémas, Auteur ; Vincent Poulain, Auteur ; Stéphane Massera , Auteur Editeur : Washington : Society of Photo-Optical Instrumentation Engineers SPIE Année de publication : 2016 Collection : SPIE Proceedings num. 10000 Conférence : SPIE Remote Sensing 2016, Sensors, Systems, and Next-Generation Satellites XX 26/09/2016 29/09/2016 Edimbourg Royaume-Uni Proceedings SPIE Note générale : bibliographie
in Sensors, Systems, and Next-Generation Satellites XXLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] étalonnage géométrique
[Termes IGN] image Sentinel-MSI
[Termes IGN] qualité d'image
[Termes IGN] test de performanceRésumé : (auteur) In the frame of the Copernicus program of the European Commission, Sentinel-2 offers multispectral high-spatial-resolution optical images over global terrestrial surfaces. In cooperation with ESA, the Centre National d’Etudes Spatiales (CNES) is in charge of the image quality of the project, and so ensures the CAL/VAL commissioning phase during the months following the launch. Sentinel-2 is a constellation of 2 satellites on a polar sun-synchronous orbit with a revisit time of 5 days (with both satellites), a high field of view - 290km, 13 spectral bands in visible and shortwave infrared, and high spatial resolution - 10m, 20m and 60m. The Sentinel-2 mission offers a global coverage over terrestrial surfaces. The satellites acquire systematically terrestrial surfaces under the same viewing conditions in order to have temporal images stacks. The first satellite was launched in June 2015. Following the launch, the CAL/VAL commissioning phase is then lasting during 6 months for geometrical calibration. This paper will point on observations and results seen on Sentinel-2 images during commissioning phase. It will provide explanations about Sentinel-2 products delivered with geometric corrections. This paper will detail calibration sites, and the methods used for geometrical parameters calibration and will present linked results. The following topics will be presented: viewing frames orientation assessment, focal plane mapping for all spectral bands, results on geolocation assessment, and multispectral registration. There is a systematic images recalibration over a same reference which is a set of S2 images produced during the 6 months of CAL/VAL. This set of images will be presented as well as the geolocation performance and the multitemporal performance after refining over this ground reference. Numéro de notice : C2016-043 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1117/12.2236313 Date de publication en ligne : 14/12/2016 En ligne : https://doi.org/10.1117/12.2236313 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91856 Study and development of a laser based alignment system for the compact linear collider / Guillaume Stern (2016)
Titre : Study and development of a laser based alignment system for the compact linear collider Type de document : Thèse/HDR Auteurs : Guillaume Stern, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2016 Autre Editeur : Zurich : Eidgenossische Technische Hochschule ETH - Ecole Polytechnique Fédérale de Zurich EPFZ Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 96 Importance : 230 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-42-0 Note générale : bibliographie
thesis submitted to attain the degree of doctor of sciences of ETH ZurichLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] accélérateur de particules
[Termes IGN] caméra numérique
[Termes IGN] capteur actif
[Termes IGN] laser
[Termes IGN] topométrie de précisionIndex. décimale : 35.10 Acquisition d'images Résumé : (auteur) The first objective of the PhD thesis is to develop a new type of positioning sensor to align components at micrometre level over 200 m with respect to a laser beam as straight line reference. The second objective is to estimate the measurement accuracy of the total alignment system over 200 m. The context of the PhD thesis is the Compact Linear Collider project, which is a study for a future particle accelerator.
The proposed positioning sensor is made of a camera and an open/close shutter. The sensor can measure the position of the laser beam with respect to its own coordinate system. To do a measurement, the shutter closes, a laser spot appears on it, the camera captures a picture of the laser spot and the coordinates of the laser spot centre are reconstructed in the sensor coordinate system with image processing. Such a measurement requires reference targets on the positioning sensor.
To reach the first objective of the PhD thesis, we used laser theory and camera model to define an accurate image processing and we performed experiments to validate a prototype of a positioning sensor. For the second objective, we could not obtain results regarding measurement accuracy because we could not develop a full alignment system under vacuum over 200 m. However, we could estimate laser pointing stability over 200 m by extrapolating results obtained over 12 m.
As a result, we present in this report a sensor design, a calibration protocol and estimations regarding measurement uncertainty. In case of a separate calibration with theodolites, we estimated the measurement uncertainty of the positioning sensor to be 4μm for all coordinates. In case of a full auto-calibration, we estimated the measurement uncertainty of the positioning sensor to be 10μm for the radial and the vertical coordinates and 20μm for the depth coordinate. Concerning the extrapolation over long distance, we estimated laser pointing stability to be 10μm for a laser beam propagation distance of 200 m.
Our work does not provide a complete laser beam alignment system at micrometre level over 200 m but it is the first necessary step towards it.Note de contenu : 1 - Introduction
2 - Theoretical background
3 - Experiments
4 - Sensor implementation
5 - ConclusionNuméro de notice : 17460 Affiliation des auteurs : non IGN Autre URL associée : URL supplémentaire Thématique : POSITIONNEMENT Nature : Thèse étrangère Note de thèse : thèse : Sciences : ETHZ : 2016 DOI : 10.3929/ethz-a-010621412 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-96.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89686 Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 17460-01 35.10 Livre Centre de documentation Télédétection Disponible Study of lever-arm effect using embedded photogrammetry and on-board GPS receiver on UAV for metrological mapping purpose and proposal of a free ground measurements calibration procedure / Mehdi Daakir (2016)
Titre : Study of lever-arm effect using embedded photogrammetry and on-board GPS receiver on UAV for metrological mapping purpose and proposal of a free ground measurements calibration procedure Type de document : Article/Communication Auteurs : Mehdi Daakir , Auteur ; Marc Pierrot-Deseilligny , Auteur ; Pierre Bosser , Auteur ; Francis Pichard, Auteur ; Christian Thom , Auteur ; Yohann Rabot, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2016 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 40-3/W4 Conférence : EuroCOW 2016, the European Calibration and Orientation Workshop 10/02/2016 12/02/2016 Lausanne Suisse ISPRS OA Archives Importance : pp 65 - 70 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] antenne GPS
[Termes IGN] drone
[Termes IGN] étalonnage de chambre métrique
[Termes IGN] géoréférencement direct
[Termes IGN] image aérienneRésumé : (auteur) Nowadays, Unmanned Aerial Vehicle (UAV) on-board photogrammetry knows a significant growth due to the democratization of using drones in the civilian sector. Also, due to changes in regulations laws governing the rules of inclusion of a UAV in the airspace which become suitable for the development of professional activities. Fields of application of photogrammetry are diverse, for instance: architecture, geology, archaeology, mapping, industrial metrology, etc. Our research concerns the latter area. Vinci-Construction- Terrassement is a private company specialized in public earthworks that uses UAVs for metrology applications. This article deals with maximum accuracy one can achieve with a coupled camera and GPS receiver system for direct-georeferencing of Digital Surface Models (DSMs) without relying on Ground Control Points (GCPs) measurements. This article focuses specially on the lever-arm calibration part. This proposed calibration method is based on two steps: a first step involves the proper calibration for each sensor, i.e. to determine the position of the optical center of the camera and the GPS antenna phase center in a local coordinate system relative to the sensor. A second step concerns a 3d modeling of the UAV with embedded sensors through a photogrammetric acquisition. Processing this acquisition allows to determine the value of the lever-arm offset without using GCPs. Numéro de notice : C2016-001 Affiliation des auteurs : LASTIG LOEMI+Ext (2012-2019) Autre URL associée : vers HAL Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprs-archives-XL-3-W4-65-2016 Date de publication en ligne : 17/03/2016 En ligne : https://doi.org/10.5194/isprs-archives-XL-3-W4-65-2016 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79911 The art of seeing / Philippe Roy in GEO: Geoconnexion international, vol 15 n° 1 (January 2016)
[article]
Titre : The art of seeing Type de document : Article/Communication Auteurs : Philippe Roy, Auteur Année de publication : 2016 Article en page(s) : pp 24 - 26 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] détection automatique
[Termes IGN] drone
[Termes IGN] photo-interprétation
[Termes IGN] surveillanceRésumé : (éditeur) UAVs have the potential to be used for automatic surveillance in both civilian and military applications. But first they need to be able to recognise what’s of interest and what’s not. Philippe Roy looks at one method being used to enable UAVs to do just that Numéro de notice : A2016-004 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79152
in GEO: Geoconnexion international > vol 15 n° 1 (January 2016) . - pp 24 - 26[article]The future of disaster response management / Krista Montgomery in GEO: Geoconnexion international, vol 15 n° 1 (January 2016)PermalinkLe drone fait carrière / Michel Ravelet in Géomètre, n° 2131 (décembre 2015)PermalinkGeometric accuracy analysis model of the ZiYuan-3 satellite without GCPs / Xinming Tang in Photogrammetric Engineering & Remote Sensing, PERS, vol 81 n° 12 (December 2015)PermalinkIntergeo 2015 ou la foire du drone / Olivier Reis in XYZ, n° 145 (décembre 2015 - février 2016)PermalinkMapping with small UAS: A point cloud accuracy assessment / Charles K. Toth in Journal of applied geodesy, vol 9 n° 4 (December 2015)PermalinkOcular robotics : The world's most dynamic eye / Ocular robotics in GIM international [en ligne], vol 29 n° 12 (December 2015)PermalinkSetting the standard in city digitalisation / Marie-Caroline Rondeau in Geoinformatics, vol 18 n° 8 (December 2015)PermalinkUAV real-time: Data use in a lightweight direct georeferencing system / Christian Eling in GPS world, vol 26 n° 11 (November 2015)PermalinkFlying high with a UAS adventurer / Anonyme in Position, n° 79 (October - November 2015)PermalinkImproved wide-angle, fisheye and omnidirectional camera calibration / Steffen Urban in ISPRS Journal of photogrammetry and remote sensing, vol 108 (October 2015)Permalink