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Real-time object detection with sub-pixel accuracy using the level set method / F. Burkert in Photogrammetric record, vol 26 n° 134 (June - August 2011)  

Public [article]  inPhotogrammetric record > vol 26 n° 134 (June - August 2011) . - pp 154 - 170 Titre : Real-time object detection with sub-pixel accuracy using the level set method Type de document : Article/Communication Auteurs : F. Burkert, Auteur ; Matthias Butenuth, Auteur ; M. Ulrich, Auteur Année de publication : 2011 Article en page(s) : pp 154 - 170 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] classification à base de connaissances [Termes IGN] détection d'objet [Termes IGN] détection de contours [Termes IGN] niveau de gris (image) [Termes IGN] précision infrapixellaire [Termes IGN] reconnaissance d'objets [Termes IGN] temps réel Résumé : (Auteur) This paper presents a method for object detection with sub-pixel accuracy in digital images satisfying real-time applications. The method uses an approximation of the level-set-based contour evolution, which applies only integer operations in a fast two-cycle algorithm to achieve real-time performance. Level-set-based contour evolution forms a part of the geometric active contour process, which combines image data and a priori geometric knowledge of an object to be evolved over an image towards the object border. The algorithm avoids the solution of partial differential equations. Instead only integer operations are applied and the contour evolution is performed by using a two-cycle algorithm. The proposed method for object detection with sub-pixel accuracy refines the pixel-accurate result of the level-set-based contour evolution algorithm by using a fast parabolic fitting mechanism. Sub-pixel accuracy of the resulting object contours is achieved by adjusting every contour point towards the nearby maximum of the image gradient. Real-time performance can be provided because the adjustment is performed only once after the contour evolution. Experimental results with images from industry, photogrammetry, remote sensing and medicine show the functionality and applicability of this method to several fields of work. In addition, the experiments are evaluated by applying quality measures for the geometric accuracy and the run time. Numéro de notice : A2011-238 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00633.x Date de publication en ligne : 06/06/2011 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00633.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31016 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-2011021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Photogrammetric image analysis PIA 11, Munich, Germany, October 5-7, 2011 / Uwe Stilla (2011)  

Public Titre : Photogrammetric image analysis PIA 11, Munich, Germany, October 5-7, 2011 Type de document : Actes de congrès Auteurs : Uwe Stilla, Éditeur scientifique ; Franz Rottensteiner, Éditeur scientifique ; Helmut Mayer, Éditeur scientifique ; Boris Jutzi, Éditeur scientifique ; Matthias Butenuth, Éditeur scientifique Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2011 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-3/W22 Conférence : PIA 2011, ISPRS Conference on Photogrammetric Image Analysis 05/10/2011 07/10/2011 Munich Allemagne OA ISPRS Archives Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse d'image numérique [Termes IGN] appariement d'images [Termes IGN] centroïde [Termes IGN] classification [Termes IGN] détection d'objet [Termes IGN] modèle numérique de surface [Termes IGN] orientation d'image [Termes IGN] poursuite de cible [Termes IGN] reconstruction 3D [Termes IGN] vision par ordinateur Numéro de notice : 13843 Affiliation des auteurs : non IGN Thématique : IMAGERIE/INFORMATIQUE Nature : Actes DOI : sans Date de publication en ligne : 26/04/2013 En ligne : https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXVIII-3-W22/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92335

Contient

• Change detection in a topographic building database using submetric satellite images / Arnaud Le Bris (2011)    
• Multiscale Haar transform for blur estimation from a set of images / Lâmân Lelégard (2011)    
• Reflectance estimation from urban terrestrial images: validation of a symbolic ray-tracing method on synthetic data / Fabien Coubard (2011)    
• Fast and accurate visibility computation in urban scenes / Bruno Vallet (2011)    
• Interpretation of 2D and 3D building details on facade and roofs / Philip Meixner (2011)    

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13843-01	DEP-RECP	Cédérom	LASTIG	Dépôt en unité	Exclu du prêt

Integration of heterogeneous geospatial data in a federated database / Matthias Butenuth in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 5 (October 2007)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 62 n° 5 (October 2007) . - pp 328 - 346 Titre : Integration of heterogeneous geospatial data in a federated database Type de document : Article/Communication Auteurs : Matthias Butenuth, Auteur ; G. Gösseln, Auteur ; M. Tiedge, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 328 - 346 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] appariement de données localisées [Termes IGN] base de données localisées [Termes IGN] déformation géométrique [Termes IGN] données hétérogènes [Termes IGN] données localisées [Termes IGN] données maillées [Termes IGN] données topographiques [Termes IGN] données vectorielles [Termes IGN] image multibande [Termes IGN] intégration de données [Termes IGN] mise à jour de base de données Résumé : (Auteur) The integration of heterogeneous geospatial data offers possibilities to manually and automatically derive new information, which are not available when using only a single data source. Furthermore, it allows for a consistent representation and the propagation of updates from one data set to the other. However, different acquisition methods, data schemata and updating cycles of the content can lead to discrepancies in geometric and thematic accuracy and correctness which hamper the combined integration. To overcome these difficulties, appropriate methods for the integration and harmonization of data from different sources and of different types are needed. In this paper, we describe two generic cases including novel integration algorithms, namely the integration of two heterogeneous vector data sets, and the integration of raster and vector data. Both algorithms are linked to a federated database which allows for automatic object matching and for managing n:m relationships. We describe and illustrate our work using vector data from topography and the geosciences, as well as multi-spectral imagery. Copyright ISPRS Numéro de notice : A2007-483 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.04.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.04.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28846 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-07071	SL	Revue	Centre de documentation	Revues en salle	Disponible

Graph-supported verification of road databases / Markus Gerke in ISPRS Journal of photogrammetry and remote sensing, vol 58 n° 3-4 (January - June 2004)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 58 n° 3-4 (January - June 2004) . - pp 152 - 165 Titre : Graph-supported verification of road databases Type de document : Article/Communication Auteurs : Markus Gerke, Auteur ; Matthias Butenuth, Auteur ; Christian Heipke, Auteur ; F. Willrich, Auteur Année de publication : 2004 Article en page(s) : pp 152 - 165 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] base de données routières [Termes IGN] contrôle qualité [Termes IGN] extraction du réseau routier [Termes IGN] fiabilité des données [Termes IGN] graphe [Termes IGN] méthode fiable [Termes IGN] test de performance Résumé : (Auteur) The verification of existing data is an important task in order to ensure a high level of data quality, such as is needed in geographic information systems (GIS). Today, this work is carried out manually by an operator, who compares vector data from databases with remotely sensed imagery. In this paper, a system for automated road data verification using digital image processing for the extraction of roads from aerial imagery and topological analysis in order to optimise the whole process in terms of reliability and efficiency is presented. The main goal is to call the operator's attention only to parts of the network, where the automated process did not find sufficient evidence of a road. The road extraction is supported by the use of prior knowledge on the global level (whether the road is situated in rural, urban or forest areas), and information on the road geometry and its attributes. The road extraction is executed twice. Firstly, with a strict parameter control ensuring the minimization of false positives and a subsequent evaluation, which denotes roads from the database being accepted or rejected. In a second step, a graph-based search algorithm detects connections, which are missing for an optimised road network. If rejected roads are part of these connections, they are checked again using a more tolerant parameter control. A detailed performance analysis of results shows the applicability of the proposed method for quality control of topographic road databases. Copyright ISPRS Numéro de notice : A2004-048 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2003.09.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2003.09.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26576 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-04012	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-04011	RAB	Revue	Centre de documentation	En réserve L003	Disponible