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Trajectory and image-based detection and identification of UAV / Yicheng Liu in The Visual Computer, vol 37 n° 7 (July 2021)  

Public [article]  inThe Visual Computer > vol 37 n° 7 (July 2021) Titre : Trajectory and image-based detection and identification of UAV Type de document : Article/Communication Auteurs : Yicheng Liu, Auteur ; Luchuan Liao, Auteur ; Hao Wu, Auteur ; et al., Auteur Année de publication : 2021 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] Aves [Termes IGN] caméra de surveillance PTZ [Termes IGN] classification par réseau neuronal convolutif [Termes IGN] détection d'objet [Termes IGN] drone [Termes IGN] forme caractéristique [Termes IGN] interférence [Termes IGN] objet mobile [Termes IGN] reconnaissance de formes [Termes IGN] trajectoire (véhicule non spatial) Résumé : (auteur) Much more attentions have been attracted to the inspection and prevention of unmanned aerial vehicle (UAV) in the wake of increasing high frequency of security accident. Many factors like the interferences and the small fuselage of UAV pose challenges to the timely detection of the UAV. In our work, we present a system that is capable of detecting, recognizing, and tracking an UAV using single camera automatically. For our method, a single pan–tilt–zoom (PTZ) camera detects flying objects and gets their trajectories; then, the trajectory identified as a UAV guides the camera and PTZ to capture the detailed region image of the target. Therefore, the images can be classified into the UAV and interference classes (such as birds) by the convolution neural network classifier trained with our image dataset. For the target recognized as a UAV with the double verification, the radio jammer emits the interferential radio to disturb its control radio and GPS. This system could be applied in some complex environment where many birds and UAV appear simultaneously. Numéro de notice : A2021-541 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1007/s00371-020-01937-y Date de publication en ligne : 29/07/2020 En ligne : https://doi.org/10.1007/s00371-020-01937-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=98020 [article]

Extraction of street pole-like objects based on plane filtering from mobile LiDAR data / Jingming Tu in IEEE Transactions on geoscience and remote sensing, vol 59 n° 1 (January 2021)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 59 n° 1 (January 2021) . - pp 749 - 768 Titre : Extraction of street pole-like objects based on plane filtering from mobile LiDAR data Type de document : Article/Communication Auteurs : Jingming Tu, Auteur ; Jian Yao, Auteur ; Li Li, Auteur ; et al., Auteur Année de publication : 2021 Article en page(s) : pp 749 - 768 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] analyse d'image orientée objet [Termes IGN] carte routière [Termes IGN] détection d'objet [Termes IGN] données lidar [Termes IGN] extraction de traits caractéristiques [Termes IGN] forme caractéristique [Termes IGN] méthode robuste [Termes IGN] octree [Termes IGN] réseau routier Résumé : (auteur) Pole-like objects provide important street infrastructure for road inventory and road mapping. In this article, we proposed a novel pole-like object extraction algorithm based on plane filtering from mobile Light Detection and Ranging (LiDAR) data. The proposed approach is composed of two parts. In the first part, a novel octree-based split scheme was proposed to fit initial planes from off-ground points. The results of the plane fitting contribute to the extraction of pole-like objects. In the second part, we proposed a novel method of pole-like object extraction by plane filtering based on local geometric feature restriction and isolation detection. The proposed approach is a new solution for detecting pole-like objects from mobile LiDAR data. The innovation in this article is that we assumed that each of the pole-like objects can be represented by a plane. Thus, the essence of extracting pole-like objects will be converted to plane selecting problem. The proposed method has been tested on three data sets captured from different scenes. The average completeness, correctness, and quality of our approach can reach up to 87.66%, 88.81%, and 79.03%, which is superior to state-of-the-art approaches. The experimental results indicate that our approach can extract pole-like objects robustly and efficiently. Numéro de notice : A2021-042 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2020.2993454 Date de publication en ligne : 20/05/2020 En ligne : https://doi.org/10.1109/TGRS.2020.2993454 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96758 [article]

Reconstruct street network from imprecise excavation data using fuzzy Hough transforms / Cyril de Runz in Geoinformatica, vol 18 n° 2 (April 2014)  

Public [article]  inGeoinformatica > vol 18 n° 2 (April 2014) . - pp 253 - 268 Titre : Reconstruct street network from imprecise excavation data using fuzzy Hough transforms Type de document : Article/Communication Auteurs : Cyril de Runz, Auteur ; Eric Desjardin, Auteur ; Frédéric Piantoni, Auteur ; Michel Herbin, Auteur Année de publication : 2014 Article en page(s) : pp 253 - 268 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] archéologie [Termes IGN] base de données localisées [Termes IGN] datation [Termes IGN] extraction de traits caractéristiques [Termes IGN] forme caractéristique [Termes IGN] fouille archéologique [Termes IGN] France (administrative) [Termes IGN] géopositionnement [Termes IGN] période gallo romaine [Termes IGN] Reims [Termes IGN] sous ensemble flou [Termes IGN] système d'information géographique [Termes IGN] transformation de Hough [Termes IGN] voie romaine Résumé : (Auteur) This paper proposes an approach for handling multivariate data in an archaeological Geographical Information System (GIS), providing a new tool to archaeologists and historians. Our method extracts potential objects of known shapes in a geographical database (GDB) devoted to archaeological excavations. In this work, archaeological information is organized according to three components: location, date and a shape parameter, in a context where data are imprecise and lacunar. To manage these aspects, a three-step methodology was developed using fuzzy sets modeling and adapting the fuzzy Hough transform. This methodology is applied in order to define the appropriate tool for a GDB of Roman street remains in Reims, France. The defined queries return an estimation of the possible presence of streets during a fuzzy time interval given by experts on the Roman period in Reims. Numéro de notice : A2014-226 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-013-0183-1 Date de publication en ligne : 19/05/2013 En ligne : https://doi.org/10.1007/s10707-013-0183-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33129 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-2014021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A parcel shape index for use in land consolidation planning / Demetris Demetriou in Transactions in GIS, vol 17 n° 6 (December 2013)  

Public [article]  inTransactions in GIS > vol 17 n° 6 (December 2013) . - pp 861 - 882 Titre : A parcel shape index for use in land consolidation planning Type de document : Article/Communication Auteurs : Demetris Demetriou, Auteur ; Linda M. See, Auteur ; John Stillwell, Auteur Année de publication : 2013 Article en page(s) : pp 861 - 882 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] aide à la décision [Termes IGN] Chypre [Termes IGN] classification dirigée [Termes IGN] forme caractéristique [Termes IGN] index spatial [Termes IGN] mesure géométrique [Termes IGN] parcelle agricole Résumé : (Auteur) Area shape analysis has been a subject of focus for research in geography and other disciplines for many years. However, existing area shape indices present significant weaknesses for the analysis of land parcels in an agricultural context as they do not measure shape in an appropriate, reliable or explicit manner. This article presents a new parcel shape index (PSI) which integrates six geometric parameters through multi-attribute decision-making, combined with value functions for parameter standardization. The superior performance of the new PSI in relation to three existing indices is demonstrated through a case study area in Cyprus. The methodology can be applied in other contexts aimed at assessing the quality of a particular shape compared to an optimum. Numéro de notice : A2013-673 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01371.x Date de publication en ligne : 05/02/2013 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01371.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32809 [article]

Why the artificial shapes for the smaller islands on the portolan charts (1330-1600) help to clarify their navigational use / Tony Campbell in Cartes & Géomatique, n° 216 (juin 2013)  

Public [article]  inCartes & Géomatique > n° 216 (juin 2013) . - pp 47 - 66 Titre : Why the artificial shapes for the smaller islands on the portolan charts (1330-1600) help to clarify their navigational use Type de document : Article/Communication Auteurs : Tony Campbell, Auteur Année de publication : 2013 Article en page(s) : pp 47 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie ancienne [Termes IGN] carte marine [Termes IGN] forme caractéristique [Termes IGN] île [Termes IGN] navigation maritime [Termes IGN] portulan [Termes IGN] précision des données [Termes IGN] toponyme [Termes IGN] toponyme nautique Résumé : (Auteur) Portolan charts have been studied for more than a century and a half, and intensively so in recent years. Yet several basic questions remain unanswered; indeed, some have never been asked. A detailed investigation, focusing in particular on the place-names, and the shapes of the medium and small islands, has been carried out over the past few years. This has made possible a new understanding of the charts' development and a fresh explanation of both their purpose and longevity. Portolan charts contain an unexpected mixture of surprising geometric accuracy and apparently frivolous invention. Their toponymy was static enough to include in 1600 three-quarters of the names that can be seen 300 years earlier. Yet at the same time they were dynamic enough to introduce many hundreds of new, and subsequently repeated, names over that period, and to discard hundreds of others. It will be demonstrated that the portolan charts -leaving aside their land-based roles as decorative mercantile or prestige objects - were an essential tool for sailors. Their uneven 'accuracy' can be explained in terms of three distinct shipboard uses: first, when on a long sea passage out of sight of land, second, when working from headland to headland along a coast, and third, when picking a way through an archipelago - particularly those in the Aegean Sea. The strange, clearly unnatural shapes given to many of the small and medium-sized islands, especially in the Aegean, have been barely noticed by previous commentators. It is suggested that these should be seen as 'mnemonic substitutions', simplifying work for the chart copyist and providing the medieval helmsman with an easy way to memorise the position of scores of islands. That these shapes were neither random nor restricted to a single chartmaking family or production centre, but were instead standardised and widely repeated, sometimes for centuries, provides evidence, in the author's view, that the 14th-century chart-makers had the imagination to create a convention-defying cartographic device. This was apparently without precedent, and not imitated elsewhere. It is ironical that the charts' continued relevance for merchant shipping can be attributed to the reverence with which every small hydrographical detail of the original workshop model was faithfully copied through perhaps ten generations, rather than to any adaptability in response to what we might have supposed were evolutionary pressures. Only the vital, and ever-changing toponymy contradicts that statement. Numéro de notice : A2013-430 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans En ligne : http://www.lecfc.fr/new/articles/216-article-5.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32568 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
021-2013021	RAB	Revue	Centre de documentation	En réserve L003	Disponible