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Generalisation and data quality / Nicolas Regnauld (2015)  

Public contenu dans ISPRS Geospatial Week 2015 / Clément Mallet (2015)   Titre : Generalisation and data quality Type de document : Article/Communication Auteurs : Nicolas Regnauld , Auteur Congrès : ISPRS Geospatial Week 2015 (28 septembre - 3 octobre 2015; La Grande Motte, France) , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2015 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. XL-3-W3 Importance : pp 91 - 94 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation automatique de données [Termes IGN] qualité des données [Termes IGN] utilisateur [Vedettes matières IGN] Généralisation Résumé : (auteur) The quality of spatial data has a massive impact on its usability. It is therefore critical to both the producer of the data and its users. In this paper we discuss the close links between data quality and the generalisation process. The quality of the source data has an effect on how it can be generalised, and the generalisation process has an effect on the quality of the output data. Data quality therefore needs to be kept under control. We explain how this can be done before, during and after the generalisation process, using three of 1Spatial’s software products: 1Validate for assessing the conformance of a dataset against a set of rules, 1Integrate for automatically fixing the data when non-conformances have been detected and 1Generalise for controlling the quality during the generalisation process. These tools are very effective at managing data that need to conform to a set of quality rules, the main remaining challenge is to be able to define a set of quality rules that reflects the fitness of a dataset for a particular purpose. Numéro de notice : C2015-003 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprsarchives-XL-3-W3-91-2015 date de publication en ligne : 19/08/2015 En ligne : http://dx.doi.org/10.5194/isprsarchives-XL-3-W3-91-2015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83520

Close-range photogrammetric tools for small 3d archeological objects / Mariam Samaan (2013)    

Public contenu dans XXIV International CIPA Symposium 2–6 September 2013, Strasbourg, France / Pierre Grussenmeyer (2013)   Titre : Close-range photogrammetric tools for small 3d archeological objects Type de document : Article/Communication Auteurs : Mariam Samaan, Auteur ; Raphaële Heno , Auteur ; Marc Pierrot-Deseilligny , Auteur Congrès : Congrès: ISPRS CIPA 2013, 23rd international symposium Recording, Documentation and Cooperation for Cultural Heritage (2 - 6 septembre 2013; Strasbourg, France), Commanditaire Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2013 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 Importance : pp 549 - 553 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] corrélation automatique de points homologues [Termes IGN] hiéroglyphe [Termes IGN] MicMac [Termes IGN] modélisation 3D [Termes IGN] patrimoine culturel [Termes IGN] patrimoine immobilier [Termes IGN] photogrammétrie métrologique Résumé : (auteur) This article will focus on the first experiments carried out for our PHD thesis, which is meant to make the new image-based methods available for archeologists. As a matter of fact, efforts need to be made to find cheap, efficient and user-friendly procedures for image acquisition, data processing and quality control. Among the numerous tasks that archeologists have to face daily is the 3D recording of very small objects. The Apero/MicMac tools were used for the georeferencing and the dense correlation procedures. Relatively standard workflows lead to depth maps, which can be represented either as 3D point clouds or shaded relief images. Numéro de notice : C2013-009 Affiliation des auteurs : LGA (2012-2018) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliés DOI : 10.5194/isprsarchives-XL-5-W2-549-2013 date de publication en ligne : 22/07/2013 En ligne : http://doi.org/10.5194/isprsarchives-XL-5-W2-549-2013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90823

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3D Virtual Reconstruction and Visualization of Complex Architectures / Fabio Remondino (2012)  

Public Titre : 3D Virtual Reconstruction and Visualization of Complex Architectures Type de document : Actes de congrès Auteurs : Fabio Remondino, Editeur scientifique ; Sabry F. El Hakim, Editeur scientifique Congrès : 3D-ARCH 2011, 4th ISPRS International Workshop (2 - 4 mars 2011; Trento, Italie), Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2012 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 38-5-W16 Langues : Anglais (eng) Numéro de notice : 17112 Affiliation des auteurs : non IGN Nature : Actes En ligne : http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXVIII-5-W16/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79899

Contient

• Apero, an open source bundle adjusment software for automatic calibration and orientation of set of images / Marc Pierrot-Deseilligny (2011)  

An accuracy assessment of automated photogrammetric techniques for 3D modeling of complex interiors / Athanasios Georgantas (2012)  

Public contenu dans Proceedings, Commission 3, XXII ISPRS Congress, 25 August – 01 September 2012, Melbourne, Australia / M. Shortis (2012)   Titre : An accuracy assessment of automated photogrammetric techniques for 3D modeling of complex interiors Type de document : Article/Communication Auteurs : Athanasios Georgantas, Auteur ; Mathieu Brédif , Auteur ; Marc Pierrot-Deseilligny , Auteur Congrès : ISPRS 2012, 22th international congress (25 aout - 1er septembre 2012; Melbourne, Australie) , Commanditaire Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2012 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 39-B3 Importance : pp 23 - 28 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] analyse comparative [Termes IGN] APERO [Termes IGN] compensation par faisceaux [Termes IGN] données localisées 3D [Termes IGN] espace intérieur [Termes IGN] MicMac [Termes IGN] modèle 3D du site Résumé : (auteur) This paper presents a comparison of automatic photogrammetric techniques to terrestrial laser scanning for 3D modelling of complex interior spaces. We try to evaluate the automated photogrammetric techniques not only in terms of their geometric quality compared to laser scanning but also in terms of cost in money, acquisition and computational time. To this purpose we chose as test site a modern building’s stairway. APERO/MICMAC ( ©IGN )which is an Open Source photogrammetric software was used for the production of the 3D photogrammetric point cloud which was compared to the one acquired by a Leica Scanstation 2 laser scanner. After performing various qualitative and quantitative controls we present the advantages and disadvantages of each 3D modelling method applied in a complex interior of a modern building. Numéro de notice : C2012-013 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprsarchives-XXXIX-B3-23-2012 En ligne : http://dx.doi.org/10.5194/isprsarchives-XXXIX-B3-23-2012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94276

Automatic cloud detection from multi-temporal satellite images: towards the use of Pléiades time series / Nicolas Champion (2012)  

Public contenu dans Proceedings, Commission 3, XXII ISPRS Congress, 25 August – 01 September 2012, Melbourne, Australia / M. Shortis (2012)   Titre : Automatic cloud detection from multi-temporal satellite images: towards the use of Pléiades time series Type de document : Article/Communication Auteurs : Nicolas Champion , Auteur Congrès : ISPRS 2012, 22th international congress (25 aout - 1er septembre 2012; Melbourne, Australie) , Commanditaire Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2012 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 39-B3 Importance : pp 559 - 564 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale [Termes IGN] détection des nuages [Termes IGN] image multitemporelle [Termes IGN] image Pléiades-HR [Termes IGN] image SPOT-HRS [Termes IGN] segmentation en régions Résumé : (auteur) Contrary to aerial images, satellite images are often affected by the presence of clouds. Identifying and removing these clouds is one of the primary steps to perform when processing satellite images, as they may alter subsequent procedures such as atmospheric corrections, DSM production or land cover classification. The main goal of this paper is to present the cloud detection approach, developed at the French Mapping agency. Our approach is based on the availability of multi-temporal satellite images (i.e. time series that generally contain between 5 and 10 images) and is based on a region-growing procedure. Seeds (corresponding to clouds) are firstly extracted through a pixel-to-pixel comparison between the images contained in time series (the presence of a cloud is here assumed to be related to a high variation of reflectance between two images). Clouds are then delineated finely using a dedicated region-growing algorithm. The method, originally designed for panchromatic SPOT5-HRS images, is tested in this paper using time series with 9 multi-temporal satellite images. Our preliminary experiments show the good performances of our method. In a near future, the method will be applied to Pléiades images, acquired during the in-flight commissioning phase of the satellite (launched at the end of 2011). In that context, this is a particular goal of this paper to show to which extent and in which way our method can be adapted to this kind of imagery. Numéro de notice : C2012-017 Affiliation des auteurs : IGN (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprsarchives-XXXIX-B3-559-2012 En ligne : http://dx.doi.org/10.5194/isprsarchives-XXXIX-B3-559-2012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94281

LIBRJMCMC: an open-source generic C++ library for stochastic optimization / Mathieu Brédif (2012)  

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Reconstruction of sky illumination domes from ground-based panoramas / Fabien Coubard (2012)  

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Apero, an open source bundle adjusment software for automatic calibration and orientation of set of images / Marc Pierrot-Deseilligny (2011)  

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Architectural patrimony management in Yemen / Raphaële Heno (2011)    

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Dimensionality based scale selection in 3d Lidar point clouds / Jérôme Demantké (2011)    

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Forest object-oriented classification with customized and automatic attribute selection / Olivier de Joinville (2010)    

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ISPRS - Commission II Mid-Term Symposium : Joint International Conference on Theory, Data Handling and Modelling in GeoSpatial Information Science / Eric Guilbert (2010)  

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ISPRS Technical Commission VIII Symposium, Networking the World with Remote Sensing, August 9–12, 2010, Kyoto, Japan / Koji Kajiwara (2010)  

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Robust and automatic vanishing points detection with their uncertainties from a single uncalibrated image, by planes extraction on the unit sphere / Mahzad Kalantari (2008)    

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Proceedings of the ISPRS Workshop 'Laser Scanning 2007 and SilviLaser 2007' September 12-14, 2007 Espoo, Finland / Petri Rönnholm (2007)  

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