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SPOT 5 HRS geometric performances: using block adjustment as a key issue to improve quality of DEM generation / Aurélie Bouillon in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 3 (May 2006)
[article]
Titre : SPOT 5 HRS geometric performances: using block adjustment as a key issue to improve quality of DEM generation Type de document : Article/Communication Auteurs : Aurélie Bouillon, Auteur ; Marc Bernard, Auteur ; Patrick Gigord, Auteur ; Alain Orsoni , Auteur ; Véronique Rudowski, Auteur ; Alain Baudoin , Auteur Année de publication : 2006 Article en page(s) : pp 134 - 146 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] base de données localisées 3D
[Termes IGN] compensation par bloc
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] géoréférencement direct
[Termes IGN] HRS (capteur)
[Termes IGN] image SPOT-HRS
[Termes IGN] modèle numérique de surface
[Termes IGN] orthoimage
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] stéréoscopieRésumé : (Auteur) HRS instrument on board of SPOT 5 allows acquisition of stereoscopic pairs in a single pass. Its final purpose is to provide the worldwide database of Digital Terrain Models and Orthoimages, called ReferenceSD®, with no use of ground control points and a horizontal location specified as 16 m for 90% of the points. The stake is not only to fulfil the HRS' location specification of 50 m in root mean square but to obtain a location performance as best as possible and to check that the instrument can cope with the realisation of the ReferenceSD® database. That's why HRS has been the subject of specific attention even after the end of SPOT 5 in-flight commissioning phase.
This comprehensive paper summarizes the steps jointly taken by CNES, IGN, Spot Image and HRS end-users to calibrate, monitor and validate the HRS image accuracy as well as the accuracy of the final DEM products. First, an overview of HRS on SPOT 5 will be given, with a specific attention paid to the instrument geometry and rigorous sensor model available through ancillary data given with the images. Then, methods and means used by the French Space Agency (CNES) and the French Mapping Agency (IGN) to reach the objectives will be described and the final accuracy reached will be given. It concems: 1-- calibration and monitoring of the HRS geometrical parameters, and the several on board improvements brought to the satellite by CNES to improve the location accuracy at the single pair level (i.e. no tie points nor ground control points used); 2-- the HRS block adjustment model calibration and the evaluation performed by IGN at the stereo pair level (i.e with tie points used within the pair) and block level (with tie points used between different HRS strips). Finally, the article deals with several comparisons of HRS DEM's against available DEMs (eg. SRTM DTED level 2) and also reviews various evaluations of the HRS and the ReferenceSD® products made by independent users against ground truth issued from field measurements or high quality/high scale geodata. Copyright ISPRSNuméro de notice : A2006-225 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.03.002 Date de publication en ligne : 21/04/2006 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.03.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27952
in ISPRS Journal of photogrammetry and remote sensing > vol 60 n° 3 (May 2006) . - pp 134 - 146[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-06031 SL Revue Centre de documentation Revues en salle Disponible Geometric calibration of Pleiades location model / Daniel Greslou in Revue Française de Photogrammétrie et de Télédétection, n° 181 (Mars 2006)
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Titre : Geometric calibration of Pleiades location model Type de document : Article/Communication Auteurs : Daniel Greslou, Auteur ; F. Delussy, Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 25 - 30 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] étalonnage géométrique
[Termes IGN] géoréférencement
[Termes IGN] instrument embarqué
[Termes IGN] modèle physique
[Termes IGN] Pleiades-HR
[Termes IGN] point d'appui
[Termes IGN] positionnement absolu
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] satellite agileRésumé : (Auteur) Pleiades is a high-resolution optical Earth observation system developed by the French National Space Agency CNES, for civilian and militarian users. It will operate in 2008-2009 two agile satellites with very high geometric accuracy since latest budgets show that the system could reach, after in-flight commissioning, an absolute location performance better than the current Pleiades specifications set at 12m for 90% of images. Given this level of accuracy, the geometric calibration needs the use of a very high planimetric and altimetric accurate reference data which is obtained with heavy and costly means: generally, only one or two areas are equipped, and complete calibration could take several months after launch. In order to gain time, a first "coarse" calibration will be performed using ground control points and an accurate physical model of the instrument. This first step should allow the system to reach its specifications more quickly. This paper presents the global methodology planned to calibrate the geometric location model. It also highlight the need of an accurate GCP data base for this treatment and for periodic assessment of the location budget. Copyright SFPT Numéro de notice : A2006-615 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS2-18.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28338
in Revue Française de Photogrammétrie et de Télédétection > n° 181 (Mars 2006) . - pp 25 - 30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 018-06011 RAB Revue Centre de documentation En réserve L003 Disponible Preparing the use of Pleiades images for mapping purposes : preliminary assessments at IGN-France / Jean-Philippe Cantou (01/02/2006)
Titre : Preparing the use of Pleiades images for mapping purposes : preliminary assessments at IGN-France Type de document : Article/Communication Auteurs : Jean-Philippe Cantou , Auteur ; Grégoire Maillet , Auteur ; David Flamanc , Auteur ; Hélène Buissart, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 01/02/2006 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36-1/W41 Conférence : ISPRS 2006, Commission 1, Working Groups I/5, I/6 workshop on Topographic Mapping from Space with Special Emphasis on Small Satellites 14/02/2006 16/02/2006 Ankara Turquie OA ISPRS Archives Importance : 6 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] cartographie topographique
[Termes IGN] image à résolution submétrique
[Termes IGN] image optique
[Termes IGN] image Pléiades-HR
[Termes IGN] mise à jour cartographique
[Termes IGN] qualité géométrique (image)
[Termes IGN] qualité radiométrique (image)
[Termes IGN] satellite agileRésumé : (Auteur) The Pleiades System, of which the first platform of the constellation shall be ready for launch in early 2009, is the new generation of high resolution optical sensor satellites developed by CNES, the French space agency. With its ability to provide photogrammetrists with instantaneous colour image stereo-pairs of 20km swath and 70cm resolution acquired with B/H ratios ranging from 0.15 to 2, the very agile and precisely pointing Pleiades platforms should open in many countries a new era for the updating of high scale maps, by probably avoiding heavy aerial survey campaigns in many cases. In the framework of a cooperation agreement between CNES and IGN-France (IGN-F), designed to prepare an operational use of these images, several experimentations and simulations are being carried out, in order to verify the ability of the System to fulfill the technical and operational requirements of the map-making processes, in comparison with those presently based on digital aerial photography. Among others, present studies particularly focus on :
the geometric and radiometric quality assessment of the planned System products (sensor level, orthoimages and mosaics).
the capacity assessment of the Pleiades constellation to meet the IGN-F cartographic mission needs in terms of image volume for the coverage of the national territory, whether in monoscopic or stereoscopic mode.
the potential of stereo- and three-fold stereoscopic image simulations for the extraction of buildings in 3D, after adapting algorithms primarily dedicated to higher resolution aerial images.
After an overview of the main characteristics of the Pleiades System, the paper aims at presenting the first results of these studies, which will be of great importance, together with the economic side, in the decision process of IGN-F to transfer, or not, part of the supplying of fresh images from the aerial source to the satellite source.Numéro de notice : C2006-008 Affiliation des auteurs : IGN (1940-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://www.isprs.org/proceedings/XXXVI/1-W41/makaleler/Cantau_Preparing_Pleiades [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64396 Documents numériques
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Preparing the use of Pleiades images for mapping purposesAdobe Acrobat PDF Spatiotriangulation with multisensor HR stereo-images / Thierry Toutin in IEEE Transactions on geoscience and remote sensing, vol 44 n° 2 (February 2006)
[article]
Titre : Spatiotriangulation with multisensor HR stereo-images Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur Année de publication : 2006 Article en page(s) : pp 456 - 462 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] compensation par faisceaux
[Termes IGN] compensation par moindres carrés
[Termes IGN] données multicapteurs
[Termes IGN] erreur moyenne quadratique
[Termes IGN] géoréférencement
[Termes IGN] image Ikonos
[Termes IGN] image Quickbird
[Termes IGN] image SPOT-HRG
[Termes IGN] image SPOT-HRS
[Termes IGN] modèle stéréoscopique
[Termes IGN] point de vérification
[Termes IGN] points homologues
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] spatiotriangulationRésumé : (Auteur) The objective of this research study was to evaluate the spatiotriangulation applied to multiltisensor high-resolution satellite stereo-images, which enabled the simultaneous geometric processing of a large number of stereo-pairs together to reduce the control point requirement. The spatiotriangulation is based on the three-dimensional physical models developed for multisensor images at the Canada Centre for Remote Sensing, Natural Resources Canada and on a least squares block stereo-bundle adjustment process with orbital constraints. The spatiotriangulation was applied to five along-/across-track stereo-images [panchromatic Systeme Pour l'Observation de la Terre 5 (SPOT-5) High-Resolution-Stereoscopy (HRS) and High-Resolution-Geometry (HRG), Ikonos, and QuickBird] acquired over Quebec, Canada. The first results of stereo/block bundle adjustment showed that the same error residuals than the input data errors (1/2 to 1-2 pixels) were obtained depending of the stereo-images, whether independently or simultaneously processed. The second and most important results were related to simultaneous stereo-bundle adjustments of the largest "master" SPOT-5 stereo-pair (either HRS or HRG) using 12 ground control points (GCPs) and the smallest "slave" stereo-pair(s) using no GCP but only stereo tie-points (TPs). Better results were normally obtained with SPOT-5-HRG (5-m resolution) as the "master" stereo-pair due to less difference in the sensors resolution than with SPOT-5 HRS. The root mean square errors, verified by independent check points (ICPs) belonging only to the "slave" stereo-pairs, were around 2 in in the three axes. However, the combined image pointing and map errors of ICPs (1-2 m) are included in these 2-m error results, and the internal accuracy of the stereo-pairs should thus be better (less than one resolution). The research study demonstrated thus the possibility to use the largest stereo-pair with a reduced number of GCPs to simultaneously adjust single or multiple stereo-pair(s) with only stereo TPs, and with no degradation in the accuracy. Numéro de notice : A2006-127 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2005.861005 En ligne : https://doi.org/10.1109/TGRS.2005.861005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27854
in IEEE Transactions on geoscience and remote sensing > vol 44 n° 2 (February 2006) . - pp 456 - 462[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-06021 RAB Revue Centre de documentation En réserve L003 Disponible Photogrammetric techniques in civil engineering material testing and structure monitoring / Hans-Gerd Maas in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 1 (January 2006)
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Titre : Photogrammetric techniques in civil engineering material testing and structure monitoring Type de document : Article/Communication Auteurs : Hans-Gerd Maas, Auteur ; U. Hampel, Auteur Année de publication : 2006 Article en page(s) : pp 39 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] acquisition de données
[Termes IGN] déformation d'édifice
[Termes IGN] génie civil
[Termes IGN] matériel
[Termes IGN] photogrammétrie métrologique
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] surveillance d'ouvrageRésumé : (Auteur) Civil engineering material testing includes a wide range of applications requiring the determination of the three-dimensional shape of an object and changes thereof. Large structure monitoring will often include the necessity of determining object deformations at a large number of points. Photogrammetric techniques offer a large potential for the solution of a wide range of measurement tasks in this field. A modular toolbox consisting of digital cameras, computer interfaces, illumination systems, calibration devices, combined with subpixel accuracy image measurement operators, multi-image matching techniques, and self-calibrating bundle adjustment in a suitable user interface, depicts a very powerful tool for tailoring custom-made solutions for material testing labs. Due to the wide range and the repetitive nature of measurements tasks in civil engineering, these applications could depict a significant future market for photogrammetry.
This paper will briefly discuss the major hardware and software modules of a toolbox for civil engineering material testing and large structure monitoring. Based on several sample applications covering object dimensions from 10 cm to 500 meters, the potential of photogrammetric deformation measurement techniques will be shown. The major advantage of photogrammetric techniques can often be seen in the fact that they allow for highly automated measurements at a large number of points simultaneously. In many cases, object deformations can be determined at a precision in the order of 1:100 000 of the object dimension, based on off-the-shelf hardware components.Numéro de notice : A2006-001 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.72.1.39 En ligne : https://doi.org/10.14358/PERS.72.1.39 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27729
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