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Radarsat-2 data: automated high accuracy geometric correction and mosaicking without ground control points / Penggen Cheng in Geoinformatics, vol 13 n° 5 (01/07/2010)
[article]
Titre : Radarsat-2 data: automated high accuracy geometric correction and mosaicking without ground control points Type de document : Article/Communication Auteurs : Penggen Cheng, Auteur ; Thierry Toutin , Auteur Année de publication : 2010 Article en page(s) : pp 22 - 27 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] géoréférencement direct
[Termes IGN] image radar
[Termes IGN] image Radarsat
[Termes IGN] mosaïquage d'images
[Termes IGN] orthoimage
[Termes IGN] orthorectification automatique
[Termes IGN] point d'appui
[Termes IGN] RadarsatRésumé : (Auteur) Imagine a fully automated system used to produce accurate high resolution radar ortho-image and -mosaics all over the world with excellent reliability! Emergency management teams could then have access to highly-accurate radar data as soon as it becomes available for their time-sensitive needs. This was a difficult task, mainly due to the arduous process of collecting ground control points (GCPs). It is now possible with the successful operation of the radarsat-2 satellite and a new 3D hybrid satellite model that process this data without user-collected GCPs. Numéro de notice : A2010-270 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30464
in Geoinformatics > vol 13 n° 5 (01/07/2010) . - pp 22 - 27[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 262-2010051 SL Revue Centre de documentation Revues en salle Disponible A novel approach to terrestrial Lidar georeferencing / B. Wilkinson in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 6 (June 2010)
[article]
Titre : A novel approach to terrestrial Lidar georeferencing Type de document : Article/Communication Auteurs : B. Wilkinson, Auteur ; A. Mohamed, Auteur ; B. Dewitt, Auteur ; G. Seedahmed, Auteur Année de publication : 2010 Article en page(s) : pp 683 - 690 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] géoréférencement direct
[Termes IGN] orientation absolue
[Termes IGN] semis de points
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) This paper describes a novel method for determining the absolute orientation of lidar point clouds using GPS measurements from two antennas firmly mounted on the optical head of a lidar scanner. The solution is linear and is derived from the non-linear georeferencing model by exploiting the properties of the skew-symmetric matrix. Simulation and real world experimentation using our prototype suggest a precision of about 0.05° (+_ 1 mrad) for the three Euler attitude angles. The method can help alleviate problems associated with the conventional technique and can allow for an increased number of practical applications for georeferenced terrestrial lidar. Numéro de notice : A2010-227 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.6.683 En ligne : https://doi.org/10.14358/PERS.76.6.683 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30421
in Photogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 6 (June 2010) . - pp 683 - 690[article]The Forward Propagation of Integrated System Component Errors within Airborne Lidar Data / T. Goulden in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 5 (May 2010)
[article]
Titre : The Forward Propagation of Integrated System Component Errors within Airborne Lidar Data Type de document : Article/Communication Auteurs : T. Goulden, Auteur ; Christopher Hopkinson, Auteur Année de publication : 2010 Article en page(s) : pp 589 - 601 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] erreur en position
[Termes IGN] géoréférencement direct
[Termes IGN] GPS-INS
[Termes IGN] propagation d'erreur
[Termes IGN] varianceRésumé : (Auteur) Error estimates of lidar observations are obtained by applying the General Law of Propagation of Variances (GLOPOV) to the direct georeferencing equation. Within the formulation of variance propagation, the most important consideration is the values used to describe the error of the hardware component observations including the global positioning system, inertial measurement unit, laser ranger, and laser scanner (angular encoder noise and beam divergence). Data tested yielded in general, pessimistic predictions as 85 percent of residuals were within the predicted error level. Simulated errors for varying scan angles and altitudes produced horizontal errors largely influenced by IMU subsystem error as well as angular encoder noise and beam divergence. GPS subsystem errors contribute the largest proportion of vertical error only at shallow scan angles and low altitudes. The transformation of the domination of GPS related error sources to total vertical error occurs at scan angles of 23°, 13°, and 8° at flying heights of 1,200 m, 2,000 m, and 3,000 m AGL, respectively. Copyright ASPRS Numéro de notice : A2010-162 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.5.589 En ligne : https://doi.org/10.14358/PERS.76.5.589 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30357
in Photogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 5 (May 2010) . - pp 589 - 601[article]In-flight quality assessment and data processing for airborne laser scanning / Philipp Schaer (2010)
Titre : In-flight quality assessment and data processing for airborne laser scanning Type de document : Thèse/HDR Auteurs : Philipp Schaer, Auteur ; Jan Skaloud, Directeur de thèse Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2010 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 79 Importance : 166 p. Format : 20 x 30 cm ISBN/ISSN/EAN : 978-3-908440-23-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] estimation statistique
[Termes IGN] étalonnage d'instrument
[Termes IGN] étalonnage en vol
[Termes IGN] géoréférencement direct
[Termes IGN] implémentation (informatique)
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] qualité des données
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroportéIndex. décimale : 33.80 Lasergrammétrie Résumé : (Auteur) [introduction] [...] The objectives of this research are threefold: 1. Elaborate the theoretical concepts and methodologies needed for performing fast and automated QA/QC of ALS data. This embraces the definition of a methodology to automatically assess the quality of laser measurements and to evaluate the point-cloud coverage and homogeneity. A further objective is to establish a concept to assess the accuracy of derived surface models. 2. Implement the theoretical concepts in a fully functional in-flight QA/QC tool embedded in an ALS system. This requires merging data streams from different technologies (i.e. inertial navigation, GNSS positioning, laser measurements) in real-time (RT), developing its qualitative evaluation and presenting it to the system operator. 3. Provide a thorough analysis of the system performance using data acquired under real operating conditions. The objective is to demonstrate the usefulness of the provided QC information in-flight and to determine the achievable accuracies for ALS data processed in-flight. A particular attention is payed to the evaluations of benefits using real-time Kinematics (RTK) for improving the accuracy of the RT navigation, point-cloud generation and derivation of quality metrics. [...] Note de contenu : 1 Introduction
1.1 Context
1.2 Research Objectives
1.3 Methodology
1.4 External Contributions
1.5 Thesis Outline
2 ALS Enabling Technologies
2.1 Airborne Laser Scanning
2.1.1 History of ALS Technology
2.1.2 Current in-flight QA/QC Capabilities
2.1.3 Trends in ALS
2.2 Direct Georeferencing: Basic Relations
2.3 Laser Scanner Technology
2.4 Positioning Technology
2.5 Integrated Navigation Technology
3 ALS System Calibration and Point-cloud Processing
3.1 System Calibration
3.2 Strip Adjustment
3.3 ALS Point-cloud Data Processing
3.4 Digital Elevation Models
4 Point-cloud Quality Assessment
4.1 Overview of ALS Error Sources
4.2 ALS Navigation Errors
4.3 ALS System Errors
4.4 Assessment of ALS Target Accuracy
4.5 Assessment of Scanning Geometry
4.6 Single Point Quality Indicator
4.7 Error Budget Evaluation
4.8 Use of Quality Indicators in Point-cloud Processing
5 Surface Quality Assessment
5.1 Data Coverage Analysis
5.2 Internal Data Accuracy
5.3 Height Model Data Accuracy .
6 Implementation
6.1 Handheld Airborne Mapping System
6.2 Flight Preparation
6.3 In-flight Quality Assessment Tool (IQUAL)
6.4 GPS Quality Analysis Module (GPSQUAL)
6.5 RT GPS/INS Integration Engine (GIINAV)
6.6 RT ALS Georeferencing Engine (LIEOS)
6.7 LiDAR Quality Analysis Module (LIAN)
6.8 Flight Management and Monitoring Module (HELIPOS)
7 Results and Performance Analysis
7.1 RT Trajectory and Point-cloud Accuracy
7.2 Trajectory Quality Analyses (GPSQUAL)
7.3 ALS Point-cloud Quality Analysis (LIAN)
7.4 Computational Performance
8 Conclusion and Perspectives
8.1 Summary of Contributions
8.2 Conclusions
8.3 Perspectives
Bibliography
A Derivation of Sub-matrices
B Computation of 3D Laser Footprint
C Comparison RT - PPNuméro de notice : 10368 Affiliation des auteurs : non IGN Autre URL associée : URL EPFL Thématique : IMAGERIE Nature : Thèse étrangère Note de thèse : PhD thesis : : EPFL : 2010 DOI : 10.5075/epfl-thesis-4590 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-79.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62407 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 10368-01 33.80 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible Matching terrestrial images captured by a nomad system to images of a reference database for pose estimation purpose / Arnaud Le Bris (2010)
contenu dans Photogrammetric computer vision and image analysis, ISPRS Commission 3 symposium, Saint-Mandé, 1-3 septembre 2010, volume 1. Papers accepted on the basis of peer-reviewed full manuscripts / Nicolas Paparoditis (2010)
Titre : Matching terrestrial images captured by a nomad system to images of a reference database for pose estimation purpose Type de document : Article/Communication Auteurs : Arnaud Le Bris , Auteur ; Nicolas Paparoditis , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2010 Conférence : PCV 2010, ISPRS - Commission 3 symposium Photogrammetric computer vision and image analysis 01/09/2010 03/09/2010 Saint-Mandé France ISPRS OA Archives Importance : pp 133 - 137 Note générale : Bibliographie
Paper accepted on the basis of peer-reviewed full manuscriptLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] géoréférencement direct
[Termes IGN] image panoramique
[Termes IGN] intégration de données
[Termes IGN] points homologues
[Termes IGN] SIFT (algorithme)
[Termes IGN] Stéréopolis
[Termes IGN] système de numérisation mobileRésumé : (Auteur) Mobile mapping systems have been developed to achieve a fast automated acquisition of huge quantity of georeferenced terrestrial images in urban cities. Stereopolis is such a system making it possible to capture panoramic groups of images. These georeferenced photos are then stored in urban images street scale reference databases. The issue investigated in this paper is the problem of tie points extraction between new images captured with an approximate georeferencement by a ”nomad system” and images from the reference database in order to estimate a precise pose for these new images. Because of several difficulties (diachronism, viewpoint change, scale variation, repetitive patterns) extracting enough correct well distributed tie points is difficult and directly extracted and matched SIFT keypoints from original images are most of the time not sufficient. Nevertheless, results can be improved using ortho-rectified images on the facade plane instead of original images. Rectification parameters (3D rotation) are obtained from the coordinates of vanishing points corresponding to the two main directions of the facade. These points can indeed be extracted from linear features of the facade on the images. However, many point matches remain false and difficult to detect using only their image coordinates. The use of both image coordinates and scale and orientation associated to the matched SIFT keypoints makes it possible to detect outliers and to obtain an approximate similitude model between the two ortho-images. A more accurate model can then be computed from correct tie points. Numéro de notice : C2010-003 Affiliation des auteurs : MATIS (1993-2011) Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/part3/a/pdf/133_XXXVIII-part3A.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65058 Sea surface topography and marine geoid by airborne laser altimetry and shipborne ultrasound altimetry / Philippe Limpach (2010)PermalinkTiming on the fly: synchronisation for direct georeferencing on small UAVs / J. Perry in Inside GNSS, vol 4 n° 6 (November - December 2009)Permalinkvol 14 n° 5 - septembre - octobre 2009 - Système d'information et géolocalisation (Bulletin de Ingénierie des systèmes d'information, ISI : Revue des sciences et technologies de l'information, RSTI) / Sylvie ServignePermalinkGénération d'un modèle numérique de terrain Radar : application à la région d'Oran, Algérie / K. Hasni in Bulletin des sciences géographiques, n° 23 (juin 2009)PermalinkContrôle de l'intégrité GPS en temps réel et géoréférencement direct par RTK-GPS pour le levé laser aéroporté / Yannick Stebler in Géomatique suisse, vol 107 n° 3 (01/03/2009)PermalinkAutomatde co-registration of images from multiple bands of LISS-4 camera / P. Radhadevi in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 1 (January - February 2009)PermalinkTheory and reality of direct georeferencing in national coordinates / Jan Skaloud in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 2 (March - April 2008)PermalinkPermalinkEntwicklung eines Qualitätsmodells für die Generierung von digitalen Gelandemodellen aus airborne Laser scanning / Hans Jürg Luthy (2008)PermalinkEtude sur la restitution fine de l'axe de visée d'un instrument optronique embarqué / Adeline Coupé (2008)PermalinkRoadmark reconstruction from stereo-images acquired by a ground-based mobile mapping system / Bahman Soheilian (2008)PermalinkRational function model for sensor orientation of IRS-P6 LISS-4 imagery / V. Nagasubramanian in Photogrammetric record, vol 22 n° 120 (December 2007 - February 2008)PermalinkPALSAR data without ground control points / Penggen Cheng in Geoinformatics, vol 10 n° 6 (01/09/2007)PermalinkAutomated sensor block adjustment and local satellite positioning: benefits and perspectives for mapping applications / A. Le Guellec in Revue Française de Photogrammétrie et de Télédétection, n° 185 (Mars 2007)PermalinkOpen-source software-operated CMOS camera for real-time mapping / Hervé Gontran in Revue Française de Photogrammétrie et de Télédétection, n° 185 (Mars 2007)PermalinkAdvances in mobile mapping technology / C. Vincent Tao (2007)PermalinkLIDAR : une technique prometteuse / Françoise de Blomac in SIG la lettre, n° 83 (janvier 2007)PermalinkPerformance analysis of integrated sensor orientation / A. Ip in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 1 (January 2007)PermalinkAnalysis of rigorous orientation models for pushbroom sensors: applications with Quickbird / M. Crespi in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)PermalinkRigorous approach to bore-sight self-calibration in airborne laser scanning [erratum in vol 61 n° 6 February 2007, pages 414-415] / Jan Skaloud in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 1 (October 2006)Permalink