Descripteur
Documents disponibles dans cette catégorie (113)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Change detection using Landsat time series: A review of frequencies, preprocessing, algorithms, and applications / Zhe Zhu in ISPRS Journal of photogrammetry and remote sensing, vol 130 (August 2017)
[article]
Titre : Change detection using Landsat time series: A review of frequencies, preprocessing, algorithms, and applications Type de document : Article/Communication Auteurs : Zhe Zhu, Auteur Année de publication : 2017 Article en page(s) : pp 370 - 384 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] détection de changement
[Termes IGN] détection de cible
[Termes IGN] fréquence
[Termes IGN] image Landsat
[Termes IGN] restauration d'image
[Termes IGN] série temporelleRésumé : (Auteur) The free and open access to all archived Landsat images in 2008 has completely changed the way of using Landsat data. Many novel change detection algorithms based on Landsat time series have been developed We present a comprehensive review of four important aspects of change detection studies based on Landsat time series, including frequencies, preprocessing, algorithms, and applications. We observed the trend that the more recent the study, the higher the frequency of Landsat time series used. We reviewed a series of image preprocessing steps, including atmospheric correction, cloud and cloud shadow detection, and composite/fusion/metrics techniques. We divided all change detection algorithms into six categories, including thresholding, differencing, segmentation, trajectory classification, statistical boundary, and regression. Within each category, six major characteristics of different algorithms, such as frequency, change index, univariate/multivariate, online/offline, abrupt/gradual change, and sub-pixel/pixel/spatial were analyzed. Moreover, some of the widely-used change detection algorithms were also discussed. Finally, we reviewed different change detection applications by dividing these applications into two categories, change target and change agent detection. Numéro de notice : A2017-518 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2017.06.013 En ligne : https://doi.org/10.1016/j.isprsjprs.2017.06.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86480
in ISPRS Journal of photogrammetry and remote sensing > vol 130 (August 2017) . - pp 370 - 384[article]Réservation
Réserver ce documentExemplaires(3)
Code-barres Cote Support Localisation Section Disponibilité 081-2017081 RAB Revue Centre de documentation En réserve L003 Disponible 081-2017083 DEP-EXM Revue LASTIG Dépôt en unité Exclu du prêt 081-2017082 DEP-EAF Revue Nancy Dépôt en unité Exclu du prêt On the visibility locations for continuous curves / Sarang Joshi in Computers and graphics, vol 66 (August 2017)
[article]
Titre : On the visibility locations for continuous curves Type de document : Article/Communication Auteurs : Sarang Joshi, Auteur ; Yoshida Rao, Auteur ; Bharath Ram Sundar, Auteur Année de publication : 2017 Article en page(s) : pp 34 - 44 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] courbe
[Termes IGN] traitement de données localisées
[Termes IGN] visibilitéRésumé : (auteur) The problem of determining visibility locations (VLs) on/inside a domain bounded by a planar C1-continuous curve (without vertices), such that entire domain is covered, is discussed in this paper. The curved boundary has been used without being approximated into lines or polygons. Initially, a few observations regarding the VLs for a curved boundary have been made. It is proposed that the set of VLs required to cover the domain be placed in a manner that the VLs and the lines connecting them form a spanning tree. Along with other observations, an algorithm has been provided which gives a near optimal number of VLs. The obtained number of VLs is then compared with a visibility disjoint set, called as witness points, to obtain a measure of the ‘nearness’ of the number of VLs to the optimum. The experiments on different curved shapes illustrate that the algorithm captures the optimal solution for many shapes and near-optimal for most others. Numéro de notice : A2017-563 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.cag.2017.05.023 En ligne : https://doi.org/10.1016/j.cag.2017.05.023 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86645
in Computers and graphics > vol 66 (August 2017) . - pp 34 - 44[article]
[article]
Titre : On visibility and empty-region graphs Type de document : Article/Communication Auteurs : Sagi Katz, Auteur ; Ayellet Tal, Auteur Année de publication : 2017 Article en page(s) : pp 45 - 52 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] graphe
[Termes IGN] semis de points
[Termes IGN] traitement de données localisées
[Termes IGN] triangulation de Delaunay
[Termes IGN] visibilitéRésumé : (auteur) Empty-region graphs are well-studied in Computer Graphics, Geometric Modeling, Computational Geometry, as well as in Robotics and Computer Vision. The vertices of these graphs are points in space, and two vertices are connected by an arc if there exists an empty region of a certain shape and size between them. In most of the graphs discussed in the literature, the empty region is assumed to be a circle or the union/intersection of circles. In this paper we propose a new type of empty-region graphs—the γ-visibility graph. This graph can accommodate a variety of shapes of empty regions and may be defined in any dimension. Interestingly, we will show that commonly-used shapes are a special case of our graph. In this sense, our graph generalizes some empty-region graphs. Though this paper is mostly theoretical, it may have practical implication—the numerous applications that make use of empty-region graphs would be able to select the best shape that suits the problem at hand. Numéro de notice : A2017-564 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.cag.2017.05.007 En ligne : https://doi.org/10.1016/j.cag.2017.05.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86646
in Computers and graphics > vol 66 (August 2017) . - pp 45 - 52[article]Toward a working taxonomy of geodesign practice / David Tulloch in Transactions in GIS, vol 21 n° 4 (August 2017)
[article]
Titre : Toward a working taxonomy of geodesign practice Type de document : Article/Communication Auteurs : David Tulloch, Auteur Année de publication : 2017 Article en page(s) : pp 635 - 646 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] données localisées
[Termes IGN] données thématiques
[Termes IGN] GeoDesign
[Termes IGN] taxinomie
[Termes IGN] traitement de données localiséesRésumé : (Auteur) As an emerging area of study, geodesign discussions and publications have used practice as a vital source of inspiration and evidence of the early successes of the field. A closer examination of geodesign projects reveals some similarities and differences within the practice currently discussed as geodesign. Using 28 examples of geodesign projects, this paper identifies classes of examples that are similar. Based on the practical evidence represented in the examples, a 3-level classification system is proposed for providing a basic taxonomy for geodesign projects. This taxonomic system characterizes the classes based on: (1) whether the examples ceded some design control to the computer; (2) whether public participation is incorporated into the design process; and (3) whether it employs complex substantive models. This taxonomy offers a means for understanding and describing the diversity of geodesign while also raising new questions about the boundaries and structure of the field. Numéro de notice : A2017-627 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12245 En ligne : http://dx.doi.org/10.1111/tgis.12245 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86942
in Transactions in GIS > vol 21 n° 4 (August 2017) . - pp 635 - 646[article]Index-supported pattern matching on tuples of time-dependent values / Fabio Valdés in Geoinformatica, vol 21 n° 3 (July - September 2017)
[article]
Titre : Index-supported pattern matching on tuples of time-dependent values Type de document : Article/Communication Auteurs : Fabio Valdés, Auteur ; Ralf Hartmut Güting, Auteur Année de publication : 2017 Article en page(s) : pp 429 - 458 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] appariement de données localisées
[Termes IGN] appariement de modèles conceptuels de données
[Termes IGN] attribut sémantique
[Termes IGN] base de données orientée objet
[Termes IGN] données géologiques
[Termes IGN] données maillées
[Termes IGN] données spatiotemporelles
[Termes IGN] index spatial
[Termes IGN] objet mobile
[Termes IGN] reconstruction d'itinéraire ou de trajectoire
[Termes IGN] Rome
[Termes IGN] trace GPS
[Termes IGN] traitement de données localisées
[Termes IGN] transport routierRésumé : (Auteur) Lately, the amount of mobility data recorded by GPS-enabled (and other) devices has increased drastically, entailing the necessity of efficient processing and analysis methods. In many cases, not only the geographic position, but also additional time-dependent information are traced and/or generated, according to the purpose of the evaluation. For example, in the field of animal behavior research, besides the position of the monitored animal, biologists are interested in further data like the altitude or the temperature at every measuring point. Other application domains comprise the names of streets, places of interest, or transportation modes that can be recorded along with the geographic position of a person. In this paper, we present in detail a framework for analyzing datasets with arbitrarily many time-dependent attributes. This can be considered as a major extension of our previous work, a comprehensive framework for pattern matching on symbolic trajectories with index support. For an efficient processing of different data types, a variable number of indexes of four different types that correspond to the data types of the attributes are applied. We demonstrate the expressiveness and efficiency of our approach by querying a real dataset representing taxi trips in Rome and, particularly, with a broad series of experiments using trajectories generated by BerlinMOD combined with geological raster data. Numéro de notice : A2017-377 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-016-0286-6 En ligne : https://doi.org/10.1007/s10707-016-0286-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85809
in Geoinformatica > vol 21 n° 3 (July - September 2017) . - pp 429 - 458[article]Automation of point cloud processing to increase the deformation monitoring accuracy / Ján Erdélyi in Applied geomatics, vol 9 n° 2 (June 2017)PermalinkExtracting target spectrum for hyperspectral target detection : an adaptive weighted learning method using a self-completed background dictionary / Yubin Niu in IEEE Transactions on geoscience and remote sensing, vol 55 n° 3 (March 2017)PermalinkImage-based target detection and radial velocity estimation methods for multichannel SAR-GMTI / Kei Suwa in IEEE Transactions on geoscience and remote sensing, vol 55 n° 3 (March 2017)PermalinkJoint sparse representation and multitask learning for hyperspectral target detection / Yuxiang Zhang in IEEE Transactions on geoscience and remote sensing, vol 55 n° 2 (February 2017)PermalinkDonnées 3D et SIG en open source / Anonyme in Géomatique expert, n° 114 (janvier - février 2017)PermalinkRaft cultivation area extraction from high resolution remote sensing imagery by fusing multi-scale region-line primitive association features / Wang Min in ISPRS Journal of photogrammetry and remote sensing, vol 123 (January 2017)PermalinkSimilarity matching for integrating spatial information extracted from place descriptions / Junchul Kim in International journal of geographical information science IJGIS, vol 31 n° 1-2 (January - February 2017)PermalinkTélédétection pour l'observation des surfaces continentales, Volume 1. Observation des surfaces continentales par télédétection optique / Nicolas Baghdadi (2017)PermalinkTélédétection pour l'observation des surfaces continentales, Volume 2. Observation des surfaces continentales par télédétection micro-onde / Nicolas Baghdadi (2017)PermalinkTélédétection pour l'observation des surfaces continentales, Volume 4. Observation des surfaces continentales par télédétection 2 / Nicolas Baghdadi (2017)Permalink