Photogrammetric Engineering & Remote Sensing, PERS / American society for photogrammetry and remote sensing . vol 83 n° 12Paru le : 01/12/2017 |
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Ajouter le résultat dans votre panier4FP-structure: a robust local region feature descriptor / Jiayuan Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 83 n° 12 (December 2017)
[article]
Titre : 4FP-structure: a robust local region feature descriptor Type de document : Article/Communication Auteurs : Jiayuan Li, Auteur ; Qingwu Hu, Auteur ; Mingyao Ai, Auteur Année de publication : 2017 Article en page(s) : pp 813 - 826 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] appariement d'images
[Termes IGN] corrélation automatique de points homologues
[Termes IGN] méthode robuste
[Termes IGN] points homologues
[Termes IGN] transformation affineRésumé : (Auteur) Establishing reliable correspondence for images of the same scene is still challenging work due to repetitive texture and unknown distortion. In this paper, we propose a region-matching method to simultaneously filter false matches and maximize good correspondence between images, even those with irregular distortion. First, a novel region descriptor, represented by a structure formed by four feature points (4FP-Structure), is presented to simplify matching with severe deformation. Furthermore, an expansion stage based on the special 4FP-Structure is adapted to detect and select as many high location accuracy correspondences as possible under a local affine-transformation constraint. Extensive experiments on both rigid and non-rigid image datasets demonstrate that the proposed algorithm has a very high degree of correctness and significantly outperforms other state-of-the-art methods. Numéro de notice : A2017-803 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.83.12.813 En ligne : https://doi.org/10.14358/PERS.83.12.813 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89164
in Photogrammetric Engineering & Remote Sensing, PERS > vol 83 n° 12 (December 2017) . - pp 813 - 826[article]A survey of geomatics solutions for the rapid mapping of natural hazards / Isabella Toschi in Photogrammetric Engineering & Remote Sensing, PERS, vol 83 n° 12 (December 2017)
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Titre : A survey of geomatics solutions for the rapid mapping of natural hazards Type de document : Article/Communication Auteurs : Isabella Toschi, Auteur ; Fabio Remondino, Auteur ; Tobias Kellenberger, Auteur ; André Streilein, Auteur Année de publication : 2017 Article en page(s) : pp 843 - 859 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] capteur (télédétection)
[Termes IGN] cartographie d'urgence
[Termes IGN] cartographie des risques
[Termes IGN] gestion de crise
[Termes IGN] performance
[Termes IGN] risque naturelRésumé : (Auteur) Natural hazards demand a rapid assessment of the crisis situation and the use of Geomatics platforms, sensors and techniques can efficiently answer this need. Remotely sensed data can, in fact, provide a valuable source of broad scale information at each stage of the disaster management cycle, supporting scientists and authorities in the decision-making process. Geomatics-based procedures and techniques can be especially exploited in the emergency mapping domain for the extraction of reference (pre-event) and crisis (post-event) geographic data. The major challenges today concern the efficient selection (and integration) of the most fit-for-purpose mapping solution(s) and the development of automatic procedures to increase efficiency in data processing. This survey article provides a review of the current optical remote sensing sensors (both satellite and airborne) for rapid mapping applications. Advantages and disadvantages are evaluated in order to support the selection process of the most appropriate means to gather the required information (i. e., significant and value-added data). Since valuable information should be delivered in a very short time, the management of time is defined as a priority and several solutions are discussed to pursue efficiency in both data acquisition and processing. With this in mind, the most significant issues affecting time in each step of the work-flow and overall accuracy are analyzed and reported. Numéro de notice : A2017-804 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.83.12.843 En ligne : https://doi.org/10.14358/PERS.83.12.843 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89165
in Photogrammetric Engineering & Remote Sensing, PERS > vol 83 n° 12 (December 2017) . - pp 843 - 859[article]Effect of occupation time on the horizontal accuracy of a mapping-grade GNSS receiver under dense forest canopy / Robert J. McGaughey in Photogrammetric Engineering & Remote Sensing, PERS, vol 83 n° 12 (December 2017)
[article]
Titre : Effect of occupation time on the horizontal accuracy of a mapping-grade GNSS receiver under dense forest canopy Type de document : Article/Communication Auteurs : Robert J. McGaughey, Auteur ; Kamal Ahmed, Auteur ; Hans-Erik Andersen, Auteur ; Stephen E. Reutebuch, Auteur Année de publication : 2017 Article en page(s) : PP 861 - 868 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse comparative
[Termes IGN] densité de la végétation
[Termes IGN] Etats-Unis
[Termes IGN] forêt
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] inventaire forestier étranger (données)
[Termes IGN] lever topographique
[Termes IGN] récepteur bifréquence
[Termes IGN] récepteur GPS
[Vedettes matières IGN] Inventaire forestierRésumé : (Auteur) A mapping-grade dual frequency GNSS receiver was tested under dense forest canopy to determine the effect of occupation time on horizontal accuracy. The U.S. Forest Service Forest Inventory and Analysis unit in the Pacific Northwest has been using 32 of these units to collect over 7,000 plot locations since 2013. In this study, one-hour GNSS static occupations were collected at 33 ground-surveyed positions with Trimble GeoXH6000 mapping-grade and Javad Triumph1 survey-grade receivers. Rover files were differentially post-processed and horizontal accuracy of each post-processed position was computed. Results indicated that 1.85 m accuracy (n = 990) could be achieved with the GeoXH6000 receiver with 15-minute occupations; however, maximum horizontal error was 7.01 m. Increasing occupation time to 20 minutes did not result in a significant improvement in accuracy. No correlation was found between the horizontal precision of a post-processed position reported by the postprocessing software and the field-measured horizontal accuracy of the positions. Numéro de notice : A2017-805 Affiliation des auteurs : non IGN Thématique : FORET/POSITIONNEMENT Nature : Article DOI : 10.14358/PERS.83.12.861 En ligne : https://doi.org/10.14358/PERS.83.12.861 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89166
in Photogrammetric Engineering & Remote Sensing, PERS > vol 83 n° 12 (December 2017) . - PP 861 - 868[article]