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A geometric stochastic approach based on marked point processes for road mark detection from high resolution aerial images / Olivier Tournaire in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 6 (November - December 2009)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 64 n° 6 (November - December 2009) . - 12 p. ; pp 621 - 631 Titre : A geometric stochastic approach based on marked point processes for road mark detection from high resolution aerial images Type de document : Article/Communication Auteurs : Olivier Tournaire , Auteur ; Nicolas Paparoditis , Auteur Année de publication : 2009 Article en page(s) : 12 p. ; pp 621 - 631 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] base de données routières [Termes IGN] chaîne de Markov [Termes IGN] extraction du réseau routier [Termes IGN] fonction de Green [Termes IGN] image aérienne [Termes IGN] méthode de Monte-Carlo [Termes IGN] objet géographique linéaire [Termes IGN] processus ponctuel marqué [Termes IGN] programmation stochastique [Termes IGN] réseau routier [Termes IGN] signalisation routière Résumé : (Auteur) Road detection has been a topic of great interest in the photogrammetric and remote sensing communities since the end of the 70s. Many approaches dealing with various sensor resolutions, the nature of the scene or the wished accuracy of the extracted objects have been presented. This topic remains challenging today as the need for accurate and up-to-date data is becoming more and more important. Based on this context, we will study in this paper the road network from a particular point of view, focusing on road marks, and in particular dashed lines. Indeed, they are very useful clues, for evidence of a road, but also for tasks of a higher level. For instance, they can be used to enhance quality and to improve road databases. It is also possible to delineate the different circulation lanes, their width and functionality (speed limit, special lanes for buses or bicycles...). In this paper, we propose a new robust and accurate top_down approach for dashed line detection based on stochastic geometry. Our approach is automatic in the sense that no intervention from a human operator is necessary to initialise the algorithm or to track errors during the process. The core of our approach relies on defining geometric, radiometric and relational models for dashed lines objects. The model also has to deal with the interactions between the different objects making up a line, meaning that it introduces external knowledge taken from specifications. Our strategy is based on a stochastic method, and in particular marked point processes. Our goal is to find the objects configuration minimising an energy function made-up of a data attachment term measuring the consistency of the image with respect to the objects and a regularising term managing the relationship between neighbouring objects. To sample the energy function, we use Green algorithm's; coupled with a simulated annealing to find its minimum. Results from aerial images at various resolutions are presented showing that our approach is relevant and accurate as it can handle the most frequent layouts of dashed lines. Some issues, for instance, such as the relative weighting of both terms of the energy are also discussed in the conclusion. Copyright 2009 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS). Numéro de notice : A2009-494 Affiliation des auteurs : IGN (1940-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.05.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.05.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30123 [article]

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The application of GPS precise point positioning technology in aerial triangulation / Xiuxiao Yuan in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 6 (November - December 2009)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 64 n° 6 (November - December 2009) . - pp 541 - 550 Titre : The application of GPS precise point positioning technology in aerial triangulation Type de document : Article/Communication Auteurs : Xiuxiao Yuan, Auteur ; Jianhong Fu, Auteur ; Hongxing Sun, Auteur ; Charles K. Toth, Auteur Année de publication : 2009 Article en page(s) : pp 541 - 550 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] aérotriangulation numérique [Termes IGN] analyse comparative [Termes IGN] compensation par faisceaux [Termes IGN] erreur aléatoire [Termes IGN] erreur systématique [Termes IGN] GPS en mode différentiel [Termes IGN] positionnement ponctuel précis Résumé : (Auteur) In traditional GPS-supported aerotriangulation, differential GPS (DGPS) positioning technology is used to determine the 3-dimensional coordinates of the perspective centers at exposure time with an accuracy of centimeter to decimeter level. This method can significantly reduce the number of ground control points (GCPs). However, the establishment of GPS reference stations for DGPS positioning is not only labor-intensive and costly, but also increases the implementation difficulty of aerial photography. This paper proposes aerial triangulation supported with GPS precise point positioning (PPP) as a way to avoid the use of the GPS reference stations and simplify the work of aerial photography. Firstly, we present the algorithm for GPS PPP in aerial triangulation applications. Secondly, the error law of the coordinate of perspective centers determined using GPS PPP is analyzed. Thirdly, based on GPS PPP and aerial triangulation software self-developed by the authors, four sets of actual aerial images taken from surveying and mapping projects, different in both terrain and photographic scale, are given as experimental models. The four sets of actual data were taken over a flat region at a scale of 1:2500, a mountainous region at a scale of 1:3000, a high mountainous region at a scale of 1:32000 and an upland region at a scale of 1:60000 respectively. In these experiments, the GPS PPP results were compared with results obtained through DGPS positioning and traditional bundle block adjustment. In this way, the empirical positioning accuracy of GPS PPP in aerial triangulation can be estimated. Finally, the results of bundle block adjustment with airborne GPS controls from GPS PPP are analyzed in detail. The empirical results show that GPS PPP applied in aerial triangulation has a systematic error of half-meter level and a stochastic error within a few decimeters. However, if a suitable adjustment solution is adopted, the systematic error can be eliminated in GPS-supported bundle block adjustment. When four full GCPs are emplaced in the corners of the adjustment block, then the systematic error is compensated using a set of independent unknown parameters for each strip, the final result of the bundle block adjustment with airborne GPS controls from PPP is the same as that of bundle block adjustment with airborne GPS controls from DGPS. Although the accuracy of the former is a little lower than that of traditional bundle block adjustment with dense GCPs, it can still satisfy the accuracy requirement of photogrammetric point determination for topographic mapping at many scales. Numéro de notice : A2009-495 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.03.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.03.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30124 [article]

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Generation and application of rules for quality dependent facade reconstruction / S. Becker in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 6 (November - December 2009)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 64 n° 6 (November - December 2009) . - 14 p. ; pp 640 - 653 Titre : Generation and application of rules for quality dependent facade reconstruction Type de document : Article/Communication Auteurs : S. Becker, Auteur Année de publication : 2009 Article en page(s) : 14 p. ; pp 640 - 653 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] architecture urbaine [Termes IGN] base de règles [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] façade [Termes IGN] grammaire de graphes [Termes IGN] itération [Termes IGN] lasergrammétrie [Termes IGN] moteur d'inférence [Termes IGN] photo-interprétation assistée par ordinateur [Termes IGN] qualité des données [Termes IGN] reconstruction 3D du bâti Résumé : (Auteur) Frequently, terrestrial LiDAR and image data are used to extract high resolution building geometry like windows, doors and protrusions for three-dimensional (3D) façade reconstruction. However, such a purely data driven bottom-up modelling of façade structures is only feasible if the available observations meet considerable requirements on data quality. Errors in measurement, varying point densities, reduced accuracies, as well as incomplete coverage affect the achievable correctness and reliability of the reconstruction result. While dependence on data quality is a general disadvantage with data driven bottom-up approaches, model based top-down reconstructions are much more robust. Algorithms introduce knowledge about the appearance and arrangement of objects. Thus, they cope with data uncertainty and allow for a procedural modelling of building structures in a predefined architectural style, which is inherent in grammar or model descriptions. We aim at a quality sensitive façade reconstruction which is on the one hand robust against erroneous and incomplete data, but on the other hand not subject to prespecified rules or models. For this purpose, we combine bottom-up and top-down strategies by integrating automatically inferred rules into a data driven reconstruction process. Façade models reconstructed during a bottom-up method serve as a knowledge base for further processing. Dominant or repetitive features and regularities as well as their hierarchical relationship are detected from the modelled façade elements and automatically translated into rules. These rules together with the 3D representations of the modelled façade elements constitute a formal grammar. It holds all the information which is necessary to reconstruct façades in the style of the given building. The paper demonstrates that the proposed algorithm is very flexible towards different data quality and incomplete sensor data. The inferred grammar is used for the verification of the façade model produced during the data driven reconstruction process and the generation of synthetic façades for which only partial or no sensor data is available. Moreover, knowledge propagation is not restricted to façades of one single building. Based on a small set of formal grammars derived from just a few observed buildings, façade reconstruction is also possible for whole districts featuring uniform architectural styles. Copyright 2009 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS). Numéro de notice : A2009-496 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.06.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.06.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30125 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-09061	RAB	Revue	Centre de documentation	En réserve L003	Disponible