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Large-scale geo-tagged video indexing and queries / He Ma in Geoinformatica, vol 18 n° 4 (October 2014)
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Titre : Large-scale geo-tagged video indexing and queries Type de document : Article/Communication Auteurs : He Ma, Auteur ; Sakire Arslan Ay, Auteur ; Roger Zimmermann, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 671-697 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] angle de visée
[Termes IGN] distance
[Termes IGN] données localisées des bénévoles
[Termes IGN] données massives
[Termes IGN] requête spatiale
[Termes IGN] vidéo numériqueRésumé : (Auteur) With the wide spread of smartphones, a large number of user-generated videos are produced everyday. The embedded sensors, e.g., GPS and the digital compass, make it possible that videos are accessed based on their geo-properties. In our previous work, we have created a framework for integrated, sensor-rich video acquisition (with one instantiation implemented in the form of smartphone applications) which associates a continuous stream of location and viewing direction information with the collected videos, hence allowing them to be expressed and manipulated as spatio-temporal objects. These sensor meta-data are considerably smaller in size compared to the visual content and are helpful in effectively and efficiently searching for geo-tagged videos in large-scale repositories. In this study, we propose a novel three-level grid-based index structure and introduce a number of related query types, including typical spatial queries and ones based on bounded radius and viewing direction restriction. These two criteria are important in many video applications and we demonstrate the importance with a real-world dataset. Moreover, experimental results on a large-scale synthetic dataset show that our approach can provide a significant speed improvements of at least 30 %, considering a mix of queries, compared to a multi-dimensional R-tree implementation. Numéro de notice : A2014-459 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.1007/s10707-013-0199-6 Date de publication en ligne : 28/12/2013 En ligne : http://dx.doi.org/10.1007/s10707-013-0199-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74031
in Geoinformatica > vol 18 n° 4 (October 2014) . - pp 671-697[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2014041 RAB Revue Centre de documentation En réserve L003 Disponible Stereo-imaging network design for precise and dense 3D reconstruction / Ali Hosseininaveh Ahmadabadian in Photogrammetric record, vol 29 n° 147 (September - November 2014)
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Titre : Stereo-imaging network design for precise and dense 3D reconstruction Type de document : Article/Communication Auteurs : Ali Hosseininaveh Ahmadabadian, Auteur ; S. Robson, Auteur ; Jan Böhm , Auteur ; et al., Auteur
Année de publication : 2014 Article en page(s) : pp 317 - 336 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] angle de visée
[Termes IGN] modèle stéréoscopique
[Termes IGN] photogrammétrie terrestre
[Termes IGN] reconstruction 3D
[Termes IGN] système de référence localRésumé : (Auteur) This paper presents a novel stereo-imaging network design strategy comprising four steps: datum definition, optimum distance estimation, candidate camera position generation, and lastly clustering and selection of vantage viewpoints. An approximate 3D mesh model of an object from a quick low-cost system is used in the first step of the method. An ellipsoid is fitted to the rough model in order to find a suitable imaging distance regarding range- and visibility-related constraints for a stereopair. Next, a set of viewpoints is provided taking into account the ellipsoid and the calculated distance. Finally, camera positions and orientations are defined by clustering and choosing the vantage viewpoints. A system, called “imaging network designer” (IND), has been developed based on this method and is evaluated with two different tests. Results show that IND can provide an imaging network, which fulfils the expected precision for the entire object. Numéro de notice : A2014-491 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12076 Date de publication en ligne : 18/09/2014 En ligne : https://doi.org/10.1111/phor.12076 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74080
in Photogrammetric record > vol 29 n° 147 (September - November 2014) . - pp 317 - 336[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 106-2014031 RAB Revue Centre de documentation En réserve L003 Disponible State of the art in high density image matching / Fabio Remondino in Photogrammetric record, vol 29 n° 146 (June - August 2014)
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Titre : State of the art in high density image matching Type de document : Article/Communication Auteurs : Fabio Remondino, Auteur ; Maria Grazia, Auteur ; Erica Nocerino, Auteur ; Fabio Menna, Auteur ; Francesco Nex, Auteur Année de publication : 2014 Article en page(s) : pp 144 - 166 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse comparative
[Termes IGN] appariement d'images
[Termes IGN] axe de prise de vue
[Termes IGN] état de l'art
[Termes IGN] image aérienne
[Termes IGN] image terrestre
[Termes IGN] logiciel de traitement d'image
[Termes IGN] semis de pointsRésumé : (Auteur) Image matching has a history of more than 50 years, with the first experiments performed with analogue procedures for cartographic and mapping purposes. The recent integration of computer vision algorithms and photogrammetric methods is leading to interesting procedures which have increasingly automated the entire image-based 3D modelling process. Image matching is one of the key steps in 3D modelling and mapping. This paper presents a critical review and analysis of four dense image-matching algorithms, available as open-source and commercial software, for the generation of dense point clouds. The eight datasets employed include scenes recorded from terrestrial and aerial blocks, acquired with convergent and normal (parallel axes) images, and with different scales. Geometric analyses are reported in which the point clouds produced with each of the different algorithms are compared with one another and also to ground-truth data. Numéro de notice : A2014-278 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12063 Date de publication en ligne : 15/06/2014 En ligne : https://doi.org/10.1111/phor.12063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33181
in Photogrammetric record > vol 29 n° 146 (June - August 2014) . - pp 144 - 166[article]In-orbit geometric calibration and validation of ZY-3 linear array sensors / Guo Zhang in Photogrammetric record, vol 29 n° 145 (March - May 2014)
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Titre : In-orbit geometric calibration and validation of ZY-3 linear array sensors Type de document : Article/Communication Auteurs : Guo Zhang, Auteur ; Yonghua Jiang, Auteur ; Deren Li, Auteur ; Wenchao Huang, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 68 - 88 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] compensation par bloc
[Termes IGN] distorsion d'image
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] étalonnage géométrique
[Termes IGN] orientation du capteur
[Termes IGN] orientation externe
[Termes IGN] satellite d'observation de la Terre
[Termes IGN] ZiYuan-3Résumé : (Auteur) The ZiYuan-3 surveying satellite (ZY-3), launched on 9th January 2012, is China's first civilian high-resolution stereo mapping satellite. To ensure the mapping accuracy of ZY-3, considerable research has been conducted since its launch on the calibration and validation of its three-line array charge-coupled device (CCD) sensors (TLC sensors). Its dynamic exterior systematic errors (such as camera installation errors) and static interior distortion were eliminated using 1:2000 digital orthophotomaps and digital elevation models (DEMs) of the Dengfeng (Henan) and Tianjin areas of China as control data. Various CCD alignment calibration models were compared, on the basis of their geometric accuracy after calibration, to determine the optimal model. Finally, validation experiments were performed using ZY-3 TLC images and ground control points (GCPs) collected over Anping in Hebei Province, Zhaodong in Heilongjiang Province and the Taihang Mountain area in China. The positioning accuracy attained its theoretical value over the Anping and Zhaodong areas. Using GCPs whose image coordinates were obtained manually, the plan and height accuracy were found to be better than 3 m and 2 m, respectively. Numéro de notice : A2014-156 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12052 Date de publication en ligne : 26/03/2014 En ligne : https://doi.org/10.1111/phor.12052 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33061
in Photogrammetric record > vol 29 n° 145 (March - May 2014) . - pp 68 - 88[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 106-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Error analysis of satellite attitude determination using a vision-based approach / Ludovico Carozza in ISPRS Journal of photogrammetry and remote sensing, vol 83 (September 2013)
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Titre : Error analysis of satellite attitude determination using a vision-based approach Type de document : Article/Communication Auteurs : Ludovico Carozza, Auteur ; Alessandro Bevilacqua, Auteur Année de publication : 2013 Article en page(s) : pp 19 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] acquisition d'images
[Termes IGN] angle de visée
[Termes IGN] erreur en position
[Termes IGN] orientation du capteur
[Termes IGN] réalité de terrain
[Termes IGN] satellite agile
[Termes IGN] simulationRésumé : (Auteur) Improvements in communication and processing technologies have opened the doors to exploit on-board cameras to compute objects’ spatial attitude using only the visual information from sequences of remote sensed images. The strategies and the algorithmic approach used to extract such information affect the estimation accuracy of the three-axis orientation of the object. This work presents a method for analyzing the most relevant error sources, including numerical ones, possible drift effects and their influence on the overall accuracy, referring to vision-based approaches. The method in particular focuses on the analysis of the image registration algorithm, carried out through on-purpose simulations. The overall accuracy has been assessed on a challenging case study, for which accuracy represents the fundamental requirement. In particular, attitude determination has been analyzed for small satellites, by comparing theoretical findings to metric results from simulations on realistic ground-truth data. Significant laboratory experiments, using a numerical control unit, have further confirmed the outcome. We believe that our analysis approach, as well as our findings in terms of error characterization, can be useful at proof-of-concept design and planning levels, since they emphasize the main sources of error for visual based approaches employed for satellite attitude estimation. Nevertheless, the approach we present is also of general interest for all the affine applicative domains which require an accurate estimation of three-dimensional orientation parameters (i.e., robotics, airborne stabilization). Numéro de notice : A2013-487 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.05.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.05.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32625
in ISPRS Journal of photogrammetry and remote sensing > vol 83 (September 2013) . - pp 19 - 29[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2013091 RAB Revue Centre de documentation En réserve L003 Disponible Multi-feature based boresight self-calibration of a terrestrial mobile mapping system / Ting On Chan in ISPRS Journal of photogrammetry and remote sensing, vol 82 (August 2013)
PermalinkLeaf area index estimation of boreal and subarctic forests using VV/HH ENVISAT/ASAR data of various swaths / Terhikki Manninen in IEEE Transactions on geoscience and remote sensing, vol 51 n° 7 Tome 1 (July 2013)
PermalinkUse of handheld thermal imager data for airborne mapping of fire radiative power and energy and flame front rate of spread / Ronan Paugam in IEEE Transactions on geoscience and remote sensing, vol 51 n° 6 Tome 1 (June 2013)
PermalinkHigh-rate precise point positioning (PPP) to measure seismic wave motions : an experimental comparison of GPS PPP with inertial measurement units / Peiliang Xu in Journal of geodesy, vol 87 n° 4 (April 2013)
PermalinkDevelopment of a Coordinate Transformation method for direct georeferencing in map projection frames / Haitao Zhao in ISPRS Journal of photogrammetry and remote sensing, vol 77 (March 2013)
PermalinkUsing optical projection in close-range photogrammetry for 6DOF sensor positioning / B. Zheng in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 1 (January 2013)
PermalinkPermalinkFast AT: a simple procedure for quasi direct orientation / M. Blazquez in ISPRS Journal of photogrammetry and remote sensing, vol 71 (July 2012)
PermalinkInvestigation of UAV systems and flight modes for photogrammetric applications / Henri Eisenbeiss in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
PermalinkAlternative method for angular rate determination within the GOCE gradiometer processing / C. Stummer in Journal of geodesy, vol 85 n° 9 (September 2011)
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