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Automated parameterisation for multi-scale image segmentation on multiple layers / L. Drăguț in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 88 (February 2014) . - pp 119 - 127 Titre : Automated parameterisation for multi-scale image segmentation on multiple layers Type de document : Article/Communication Auteurs : L. Drăguț, Auteur ; O. Csillik, Auteur ; C. Eisank, Auteur ; D. Tiede, Auteur Année de publication : 2014 Article en page(s) : pp 119 - 127 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse d'image orientée objet [Termes IGN] eCognition [Termes IGN] facteur d'échelle [Termes IGN] résolution multiple [Termes IGN] segmentation d'image [Termes IGN] variance Résumé : (Auteur) We introduce a new automated approach to parameterising multi-scale image segmentation of multiple layers, and we implemented it as a generic tool for the eCognition® software. This approach relies on the potential of the local variance (LV) to detect scale transitions in geospatial data. The tool detects the number of layers added to a project and segments them iteratively with a multi-resolution segmentation algorithm in a bottom-up approach, where the scale factor in the segmentation, namely, the scale parameter (SP), increases with a constant increment. The average LV value of the objects in all of the layers is computed and serves as a condition for stopping the iterations: when a scale level records an LV value that is equal to or lower than the previous value, the iteration ends, and the objects segmented in the previous level are retained. Three orders of magnitude of SP lags produce a corresponding number of scale levels. Tests on very high resolution imagery provided satisfactory results for generic applicability. The tool has a significant potential for enabling objectivity and automation of GEOBIA analysis. Numéro de notice : A2014-088 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32993 [article]

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Automated damage indication for rapid geospatial reporting / D. Tiede in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 9 (September 2011)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 77 n° 9 (September 2011) . - pp 933 - 942 Titre : Automated damage indication for rapid geospatial reporting Type de document : Article/Communication Auteurs : D. Tiede, Auteur ; S. Lang, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 933 - 942 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bati [Termes IGN] catastrophe naturelle [Termes IGN] dommage matériel [Termes IGN] estimation statistique [Termes IGN] extraction automatique [Termes IGN] Haïti [Termes IGN] image à haute résolution [Termes IGN] image satellite [Termes IGN] organisation du travail [Termes IGN] superposition d'images Résumé : (Auteur) A methodology for automated extraction of damage indication from very high spatial resolution satellite imagery is presented for the Haitian towns of Carrefour and Leogane following the January 2010 earthquake. Damaged buildings are identified by changes to their shadows between pre- and post-event data. The approach makes use of object-based image analysis concepts to extract relevant information on damage distribution. The methodology selected requires pre-and post-disaster images with similar sun angles and will only be suitable for the detection of collapsed (or partly collapsed) structures. The new methodology proved to be effective for the Carrefour area despite using satellite images of different qualities with inadequate image (co-)registration, producing positively validated results within an acceptable processing time, and was, to the best of our knowledge, the only automated damage assessment method to have delivered appropriate results to requesting relief organizations within a few days of the Haiti earthquake. Numéro de notice : A2011-382 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.77.9.933 En ligne : https://doi.org/10.14358/PERS.77.9.933 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31161 [article]

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Analytical 3D views and virtual globes: scientific results in a familiar spatial context / D. Tiede in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 300 - 307 Titre : Analytical 3D views and virtual globes: scientific results in a familiar spatial context Type de document : Article/Communication Auteurs : D. Tiede, Auteur ; S. Lang, Auteur Année de publication : 2010 Article en page(s) : pp 300 - 307 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] analyse spatiale [Termes IGN] extraction de données [Termes IGN] filtrage d'information [Termes IGN] géomatique web [Termes IGN] globe virtuel [Termes IGN] information complexe [Termes IGN] vue 3D Résumé : (Auteur) In this paper we introduce analytical three-dimensional (3D) views as a means for effective and comprehensible information delivery, using virtual globes and the third dimension as an additional information carrier. Four case studies are presented, in which information extraction results from very high spatial resolution (VHSR) satellite images were conditioned and aggregated or disaggregated to regular spatial units. The case studies were embedded in the context of: (1) urban life quality assessment (Salzburg/Austria); (2) post-disaster assessment (Harare/Zimbabwe); (3) emergency response (Lukole/Tanzania); and (4) contingency planning (faked crisis scenario/Germany). The results are made available in different virtual globe environments, using the implemented contextual data (such as satellite imagery, aerial photographs, and auxiliary geodata) as valuable additional context information. Both day-to-day users and high-level decision makers are addressees of this tailored information product. The degree of abstraction required for understanding a complex analytical content is balanced with the ease and appeal by which the context is conveyed. Numéro de notice : A2010-179 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30374 [article]

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ARCGIS explorer review / S. Kienberger in Geoinformatics, vol 11 n° 2 (01/03/2008)

Public [article]  inGeoinformatics > vol 11 n° 2 (01/03/2008) . - pp 42 - 47 Titre : ARCGIS explorer review Type de document : Article/Communication Auteurs : S. Kienberger, Auteur ; D. Tiede, Auteur Année de publication : 2008 Article en page(s) : pp 42 - 47 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] ArcGIS Explorer [Termes IGN] géomatique web [Termes IGN] globe virtuel [Termes IGN] intégration de données [Termes IGN] interface web [Termes IGN] visualisation 3D Résumé : (Auteur) One year after the release of Google Earth Esri announced an alternative virtual globe. The current version of ArcGIS Explorer will be evaluated here. A distinctive focus is given to different aspects such as data integrity, OGC conformity, GIS analysis capabilities, user interface and the underlying business model will have a distinctive focus. Only ArcGIS Explorer is reviewed, but compares capabilities/shortcomings to alternative virtual globes if necessary. Copyright GEOinformatics Numéro de notice : A2008-065 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29060 [article]

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