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A hybrid approach to UAV data / Debora Caldarelli in GEO: Geoconnexion international, vol 12 n° 7 (july - august 2013)
[article]
Titre : A hybrid approach to UAV data Type de document : Article/Communication Auteurs : Debora Caldarelli, Auteur Année de publication : 2013 Article en page(s) : pp 24 - 25 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] drone
[Termes IGN] estimation de précision
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] photogrammétrie aérienne
[Termes IGN] stéréoscopieRésumé : (Editeur) The author describes a new approach that could help UAV aerial photogrammetry grab a share of the market Numéro de notice : A2013-391 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32529
in GEO: Geoconnexion international > vol 12 n° 7 (july - august 2013) . - pp 24 - 25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-2013071 SL Revue Centre de documentation Revues en salle Disponible Assessing the positional accuracy of airborne laser scanning in urban areas / Joachim Hölhe in Photogrammetric record, vol 28 n° 142 (June - August 2013)
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Titre : Assessing the positional accuracy of airborne laser scanning in urban areas Type de document : Article/Communication Auteurs : Joachim Hölhe, Auteur Année de publication : 2013 Article en page(s) : pp 196 - 210 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] estimation de précision
[Termes IGN] lasergrammétrie
[Termes IGN] milieu urbain
[Termes IGN] précision du positionnement
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) A new method for assessment of the absolute positional accuracy of lidar point clouds is described. It is based on the plane surfaces of building roofs which are derived from laser footprints. Three such planes intersect at a point and the coordinates of several of these well-defined points are compared with points determined from aerial photography. From the differences obtained accuracy measures are derived. An analysis regarding the type of error distribution is carried out in order to determine whether to apply either standard or robust accuracy measures. Confidence intervals are derived for each accuracy measure by means of a unique computational method. A practical test with the proposed method revealed a high precision in the intersected points. The absolute positional accuracy of the lidar point cloud was determined with both standard and robust accuracy measures; the latter always produced smaller values. Suggestions for standards in the assessment of the positional accuracy of laser point clouds are made. Numéro de notice : A2013-336 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12013 Date de publication en ligne : 14/04/2013 En ligne : https://doi.org/10.1111/phor.12013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32474
in Photogrammetric record > vol 28 n° 142 (June - August 2013) . - pp 196 - 210[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2013021 RAB Revue Centre de documentation En réserve L003 Disponible Quality assessment of cloud-top height estimates from satellite IR radiances using the CALIPSO Lidar / Sabatino, Di Michele in IEEE Transactions on geoscience and remote sensing, vol 51 n° 4 Tome 2 (April 2013)
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Titre : Quality assessment of cloud-top height estimates from satellite IR radiances using the CALIPSO Lidar Type de document : Article/Communication Auteurs : Sabatino, Di Michele, Auteur ; Tony Mcnally, Auteur ; Peter Bauer, Auteur ; Iliana Genkova, Auteur Année de publication : 2013 Article en page(s) : pp 2454 - 2464 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Atmospheric Infrared Sounder
[Termes IGN] CALIPSO
[Termes IGN] détection des nuages
[Termes IGN] données lidar
[Termes IGN] estimation de précision
[Termes IGN] radianceRésumé : (Auteur) This paper summarizes the studies performed using data from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) to verify cloud variables in the context of the European Centre for Medium-Range Weather Forecasts assimilation system. In the first part of this paper, the cloud-top height (CTH) derived from the Atmospheric Infrared Sounder (AIRS) radiances has been compared with the same quantity from CALIPSO exploiting the spatial and temporal coincidence guaranteed by the A-Train constellation. In the second part, the CTH from CALIPSO has been used to verify the wind height assignment (HA) for the atmospheric motion vectors (AMVs) derived from Meteosat geostationary cloudy radiances. Two different estimates from AIRS have been considered: one derived from the cloud detection scheme and the other used within the assimilation of infrared (IR) cloudy radiances. The verification of cloud detection for hyperspectral IR sounders has revealed some difficulties with cirrus clouds. The verification of CTH for the assimilation of IR cloudy radiances has shown a reasonable agreement when the lidar signal is fully attenuated but a larger scatter in other conditions. The verification of AMV HA revealed an overall tendency to produce CTHs lower than CALIPSO for high clouds and the opposite for low clouds. Interestingly, a similar behavior was observed in the validation of CTHs for the assimilation of IR cloudy radiances. Numéro de notice : A2013-226 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2012.2210721 En ligne : https://doi.org/10.1109/TGRS.2012.2210721 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32364
in IEEE Transactions on geoscience and remote sensing > vol 51 n° 4 Tome 2 (April 2013) . - pp 2454 - 2464[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2013041B RAB Revue Centre de documentation En réserve L003 Disponible Accuracy assessment of commercial self-calibrating bundle adjustment routines applied to archival aerial photography / Manuel Angel Aguilar in Photogrammetric record, vol 28 n° 141 (March - May 2013)
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Titre : Accuracy assessment of commercial self-calibrating bundle adjustment routines applied to archival aerial photography Type de document : Article/Communication Auteurs : Manuel Angel Aguilar, Auteur ; Fernando José Aguilar, Auteur ; Ismael Fernadez, Auteur Année de publication : 2013 Article en page(s) : pp 96 - 114 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie
[Termes IGN] archives
[Termes IGN] auto-étalonnage
[Termes IGN] compensation par faisceaux
[Termes IGN] erreur systématique
[Termes IGN] estimation de précision
[Termes IGN] image aérienne
[Termes IGN] Leica Photogrammetry SuiteRésumé : (Auteur) The use of archival or historical photography for photogrammetric purposes often involves a lack of data concerning the aerial cameras employed, difficulties in identifying control points on the photos and inappropriate conservation of the photography. When camera calibration parameters are unknown, they should be estimated by means of a self-calibrating bundle adjustment. Several calibration models available in the Leica Photogrammetry Suite software have been tested on two archival datasets, captured in 1956 and 1977, covering the same working area. The accuracy of the dataset triangulation was found to depend significantly on the self-calibration method and the number of ground control points used; when the latter ranged from six to nine per stereopair, self-calibrating bundle adjustment techniques were found to slightly, but not always significantly, improve the photogrammetric capability of archival aerial photography. Thus, the adoption of self-calibration cannot guarantee the improvement of results when working on poorly conserved imagery. Results from such datasets are very dependent on numerous local variables which cannot be extrapolated to other areas for the same camera since each dataset is unique and may present systematic errors of a different nature. Numéro de notice : A2013-154 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12009 Date de publication en ligne : 17/12/2012 En ligne : https://doi.org/10.1111/phor.12009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32292
in Photogrammetric record > vol 28 n° 141 (March - May 2013) . - pp 96 - 114[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Latent class modeling for site- and non-site-specific classification accuracy assessment without ground data / Giles M. Foody in IEEE Transactions on geoscience and remote sensing, vol 50 n° 7 Tome 2 (July 2012)
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Titre : Latent class modeling for site- and non-site-specific classification accuracy assessment without ground data Type de document : Article/Communication Auteurs : Giles M. Foody, Auteur Année de publication : 2012 Article en page(s) : pp 2827 - 2838 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification automatique
[Termes IGN] estimation de précision
[Termes IGN] modèle de classe latente
[Termes IGN] précision de la classificationRésumé : (Auteur) Accuracy assessment should be a fundamental component of an image classification analysis and is typically undertaken following either a non-site- or a site-specific methodology. The assessment of classification accuracy is, however, often difficult, with many challenges associated with the ground data typically required. Using a series of classifications of two test sites, this paper shows that accuracy assessment from both perspectives is possible through the use of a latent class modeling approach in the absence of ground data. This is possible because the parameters of a latent class model that explains the observed associations in class labeling made by a series of classifications provide estimates of class cover and conditional probabilities of class membership that equate to popular non-site- and site-specific (producer's accuracy) measures of accuracy, respectively. Additionally, the latent class model provides a new classification that could be evaluated by traditional means if ground data are available. The classification of each test site derived from the latent class model was accurate, being of equivalent accuracy to a conventional ensemble classification that was based on the same series of classifications for a site. The ability to derive a highly accurate classification and yield estimates of classification accuracy without ground data to form a testing set indicates the considerable promise of the method and a means to reduce demands for costly ground data that may also be a source of error due to imperfections. Numéro de notice : A2012-321 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2174156 Date de publication en ligne : 19/12/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2174156 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31767
in IEEE Transactions on geoscience and remote sensing > vol 50 n° 7 Tome 2 (July 2012) . - pp 2827 - 2838[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2012071B RAB Revue Centre de documentation En réserve L003 Disponible Accuracy evaluation for automated optical indoor positioning using a camera phone / V. Händler in ZFV, Zeitschrift für Geodäsie, Geoinformation und Landmanagement, vol 137 n° 2 (01/03/2012)PermalinkObject-based image analysis of high-resolution satellite images using modified cloud basis function neural network and probabilistic relaxation labeling process / A. Rizvi in IEEE Transactions on geoscience and remote sensing, vol 49 n° 12 Tome 1 (December 2011)PermalinkSimultaneous denoising and intrinsic order selection in hyperspectral imaging / M. Farzam in IEEE Transactions on geoscience and remote sensing, vol 49 n° 9 (September 2011)PermalinkPositional Accuracy Evaluation of Declassified Hexagon KH-9 Mapping Camera Imagery / A. Surazakov in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 5 (May 2010)PermalinkConsistency of accuracy assessment indices for soft classification: simulation analysis / J. Chen in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 2 (March - April 2010)PermalinkEffects of Lidar post-spacing and DEM resolution to mean slope estimation / T. Edwin in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)PermalinkClose-range constrained image sequences / Juha Heikkinen in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 3 (May - June 2009)PermalinkGeoreferencing accuracy assessment of High-Resolution satellite images using figure condition method / Hyseyin Topan in IEEE Transactions on geoscience and remote sensing, vol 47 n° 4 (April 2009)PermalinkAssessing spatial uncertainty of LIDAR-derived building model: a case study in downtown Oklahoma city / M. Cheuk in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 3 (March 2009)PermalinkAccuracy assessment of digital elevation models based on approximation theory / P. Hu in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 1 (January 2009)Permalink