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Through-the-wall human motion indication using sparsity-driven change detection / F. Ahmad in IEEE Transactions on geoscience and remote sensing, vol 51 n° 2 (February 2013)
[article]
Titre : Through-the-wall human motion indication using sparsity-driven change detection Type de document : Article/Communication Auteurs : F. Ahmad, Auteur ; M. Amin, Auteur Année de publication : 2013 Article en page(s) : pp 881 - 890 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] détection à travers-le-mur
[Termes IGN] détection de changement
[Termes IGN] filtrage du signal
[Termes IGN] fouillis d'échos
[Termes IGN] image radar
[Termes IGN] objet mobile
[Termes IGN] positionnement en intérieur
[Termes IGN] reconstruction d'imageRésumé : (Auteur) We consider sparsity-driven change detection (CD) for human motion indication in through-the-wall radar imaging and urban sensing applications. Stationary targets and clutter are removed via CD, which converts a populated scene into a sparse scene of a few human targets moving inside enclosed structures and behind walls. We establish appropriate CD models for various possible human motions, ranging from translational motions to sudden short movements of the limbs, head, and/or torso. These models permit scene reconstruction within the compressive sensing framework. Results based on laboratory experiments show that a sizable reduction in the data volume is achieved using the proposed approach without a degradation in system performance. Numéro de notice : A2013-083 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2012.2203310 En ligne : https://doi.org/10.1109/TGRS.2012.2203310 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32221
in IEEE Transactions on geoscience and remote sensing > vol 51 n° 2 (February 2013) . - pp 881 - 890[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2013021 RAB Revue Centre de documentation En réserve L003 Disponible Trajectories of moving objects on a network: detection of similarities, visualization of relations, and classification of trajectories / Yukio Sadahiro in Transactions in GIS, vol 17 n° 1 (February 2013)
[article]
Titre : Trajectories of moving objects on a network: detection of similarities, visualization of relations, and classification of trajectories Type de document : Article/Communication Auteurs : Yukio Sadahiro, Auteur ; Raymond Lay, Auteur ; T. Kobayashi, Auteur Année de publication : 2013 Article en page(s) : pp 18 - 40 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse de groupement
[Termes IGN] analyse spatiale
[Termes IGN] classification dirigée
[Termes IGN] graphe
[Termes IGN] itinéraire
[Termes IGN] mesure de similitude
[Termes IGN] migration animale
[Termes IGN] objet mobile
[Termes IGN] relation topologique
[Termes IGN] réseau de transport
[Termes IGN] similitude
[Termes IGN] visualisation de donnéesRésumé : (Auteur) Development in techniques of spatial data acquisition enables us to easily record the trajectories of moving objects. Movement of human beings, animals, and birds can be captured by GPS loggers. The obtained data are analyzed by visualization, clustering, and classification to detect patterns frequently or rarely found in trajectories. To extract a wider variety of patterns in analysis, this article proposes a new method for analyzing trajectories on a network space. The method first extracts primary routes as subparts of trajectories. The topological relations among primary routes and trajectories are visualized as both a map and a graph-based diagram. They permit us to understand the spatial and topological relations among the primary routes and trajectories at both global and local scales. The graph-based diagram also permits us to classify trajectories. The representativeness of primary routes is evaluated by two numerical measures. The method is applied to the analysis of daily travel behavior of one of the authors. Technical soundness of the method is discussed as well as empirical findings. Numéro de notice : A2013-038 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01330.x Date de publication en ligne : 09/10/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01330.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32176
in Transactions in GIS > vol 17 n° 1 (February 2013) . - pp 18 - 40[article]Continuous aggregate nearest neighbor queries / H. Elmongui in Geoinformatica, vol 17 n° 1 (January 2013)
[article]
Titre : Continuous aggregate nearest neighbor queries Type de document : Article/Communication Auteurs : H. Elmongui, Auteur ; M. Mokbel, Auteur ; W. Aref, Auteur Année de publication : 2013 Article en page(s) : pp 63 - 95 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] agrégation spatiale
[Termes IGN] données spatiotemporelles
[Termes IGN] flux de données
[Termes IGN] objet mobile
[Termes IGN] plus proche voisin, algorithme du
[Termes IGN] requête continue
[Termes IGN] requête spatiotemporelleRésumé : (Auteur) This paper addresses the problem of continuous aggregate nearest-neighbor (CANN) queries for moving objects in spatio-temporal data stream management systems. A CANN query specifies a set of landmarks, an integer k, and an aggregate distance function f (e.g., min, max, or sum), where f computes the aggregate distance between a moving object and each of the landmarks. The answer to this continuous query is the set of k moving objects that have the smallest aggregate distance f. A CANN query may also be viewed as a combined set of nearest neighbor queries. We introduce several algorithms to continuously and incrementally answer CANN queries. Extensive experimentation shows that the proposed operators outperform the state-of-the-art algorithms by up to a factor of 3 and incur low memory overhead. Numéro de notice : A2013-047 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-011-0149-0 En ligne : https://doi.org/10.1007/s10707-011-0149-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32185
in Geoinformatica > vol 17 n° 1 (January 2013) . - pp 63 - 95[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2013011 RAB Revue Centre de documentation En réserve L003 Disponible
[article]
Titre : A generic data model for moving objects Type de document : Article/Communication Auteurs : Jingsi Xu, Auteur ; Ralf Hartmut Güting, Auteur Année de publication : 2013 Article en page(s) : pp 125 - 172 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] environnement géographique virtuel
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] objet mobile
[Termes IGN] réseau de transport
[Termes IGN] transport intermodalRésumé : (Auteur) Moving objects databases should be able to manage trips that pass through several real world environments, e.g., road network, indoor. However, the current data models only deal with the movement in one situation and cannot represent comprehensive trips for humans who can move inside a building, walk on the pavement, drive on the road, take the public vehicles (bus or train), etc. As a result, existing queries are solely limited to one environment. In this paper, we design a data model that is able to represent moving objects in multiple environments in order to support novel queries on trips in different surroundings and various transportation modes (e.g., Car, Walk, Bus). A generic and precise location representation is proposed that can apply in all environments. The idea is to let the space for moving objects be covered by a set of so-called infrastructures each of which corresponds to an environment and defines the available places for moving objects. Then, the location is represented by referencing to the infrastructure. We formulate the concept of space and infrastructure and propose the methodology to represent moving objects in different environments with the integration of precise transportation modes. Due to different infrastructure characteristics, a set of novel data types is defined to represent infrastructure components. To efficiently support new queries, we design a group of operators to access the data. We present how such a data model is implemented in a database system and report the experimental results. The new model is designed with attention to the data models of previous work for free space and road networks to have a consistent type system and framework of operators. In this way, a powerful set of generic query operations is available for querying, together with those dealing with infrastructures and transportation modes. We demonstrate these capabilities by formulating a set of sophisticated queries across all infrastructures. Numéro de notice : A2013-049 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-012-0158-7 En ligne : https://doi.org/10.1007/s10707-012-0158-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32187
in Geoinformatica > vol 17 n° 1 (January 2013) . - pp 125 - 172[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Joint estimation of moving target reflectivity and velocity via AT-InSAR systems based on complex interferometric data / Alessandra Budillon in ISPRS Journal of photogrammetry and remote sensing, vol 75 (January 2013)
[article]
Titre : Joint estimation of moving target reflectivity and velocity via AT-InSAR systems based on complex interferometric data Type de document : Article/Communication Auteurs : Alessandra Budillon, Auteur ; Vito Pascazio, Auteur ; G. Schirinzi, Auteur Année de publication : 2013 Article en page(s) : pp 1 - 10 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] image radar moirée
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] mesurage de phase
[Termes IGN] objet mobile
[Termes IGN] phase
[Termes IGN] réflectivitéRésumé : (Auteur) In this paper a technique for the joint estimation of the complex reflectivity and of the radial velocity of ground moving targets, by means of Along-Track Interferometric Synthetic Aperture Radar (AT-InSAR) systems, is presented. It is essentially based on statistical estimation techniques and exploits the complex interferometric SAR images, contrarily to other conventional AT-InSAR methods, which estimate the target radial velocity exploiting only the interferometric phases. The performances of the method are evaluated both for single baseline and for dual-baseline satellite systems, in terms of Cramer Rao Lower Bounds and of Root Mean Square Errors obtained in numerical experiments, with reference to all the target parameters to be estimated, which are the amplitude and phase of the target reflectivity and the target radial velocity. It is shown that for single baseline systems the obtained radial velocity estimation accuracy is comparable with the one achievable with AT-InSAR methods exploiting phase-only data, and is very high for high values of signal to clutter ratio. For dual-baseline systems, instead, the use of amplitude and phase data allows a performance significantly better than the one achievable exploiting phase-only data. Moreover, in the dual baseline case, high velocity estimation accuracy can be obtained also with lower signal to clutter ratios. Numéro de notice : A2013-028 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.08.008 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.08.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32166
in ISPRS Journal of photogrammetry and remote sensing > vol 75 (January 2013) . - pp 1 - 10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2013011 RAB Revue Centre de documentation En réserve L003 Disponible La programmation orientée objet / H. Bersini (2013)PermalinkVisual analytics of movement: An overview of methods, tools and procedures / Natalia Andrienko in Information visualization, vol 12 n° 1 (January 2013)PermalinkMap readers' assessment of path elements and context to identify movement behaviour in visualisations / A. Lautenschütz in Cartographic journal (the), vol 49 n° 4 (November 2012)PermalinkRCS of complex targets : original representation validated by measurements-application to ISAR imagery / Y. Bennani in IEEE Transactions on geoscience and remote sensing, vol 50 n° 10 Tome 1 (October 2012)PermalinkDiscovering spatial patterns in origin-destination mobility data / D. Guo in Transactions in GIS, vol 16 n° 3 (June 2012)PermalinkUne approche ontologique pour la structuration de données spatio-temporelles de trajectoires : Application à l’étude des déplacements de mammifères marins / W. Mefteh in Revue internationale de géomatique, vol 22 n° 1 (mars - mai 2012)PermalinkA multifrequency polarimetric SAR processing chain to observe oil fields in the Gulf of Mexico / M. Migliaccio in IEEE Transactions on geoscience and remote sensing, vol 49 n° 12 Tome 1 (December 2011)PermalinkLe Programme Forestier Communal : quand l'information géographique valorise les données communiquées aux élus des communes forestières / M. Walezak (01/09/2011)PermalinkA data model and query language for spatio-temporal decision support / L. Gomez in Geoinformatica, vol 15 n° 3 (July 2011)PermalinkPermalinkInterpreting motion events of pairs of moving objects / B. Gottfried in Geoinformatica, vol 15 n° 2 (April 2011)PermalinkAn integrated approach for visual analysis of a multisource moving objects knowledge base / N. Wllems in International journal of geographical information science IJGIS, vol 24 n° 10 (october 2010)PermalinkTightly-coupled spatial database features in the odysseus/OpenGIS DBMS for high-performance / K. Whang in Geoinformatica, vol 14 n° 4 (October 2010)PermalinkAnchor uncertainty and space-time prisms on road networks / Bart Kuijpers in International journal of geographical information science IJGIS, vol 24 n°7-8 (july 2010)PermalinkConstrained free space diagrams: a tool for trajectory analysis / Kevin Buchin in International journal of geographical information science IJGIS, vol 24 n°7-8 (july 2010)PermalinkSpatio-temporal trajectory analysis of mobile objects following the same itinerary / Laurent Etienne (26/05/2010)PermalinkAlgorithms for constrained k-nearest neighbor queries over moving object trajectories / Yunjun Gao in Geoinformatica, vol 14 n° 2 (April 2010)PermalinkEfficient evaluation of continuous spatio-temporal queries on moving objects whith uncertain velocity / Y. Huang in Geoinformatica, vol 14 n° 2 (April 2010)PermalinkModèle et langage pour la manipulation de trajectoires spatio-temporelles / D. Zheni Triki in Revue internationale de géomatique, vol 20 n° 1 (mars - mai 2010)PermalinkDévelopper avec les API Google maps / F. Goblet (2010)Permalink