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Automatic sensor orientation using horizontal and vertical line feature constraints / Yanbiao Sun in ISPRS Journal of photogrammetry and remote sensing, vol 150 (April 2019)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 150 (April 2019) . - pp 172 - 184 Titre : Automatic sensor orientation using horizontal and vertical line feature constraints Type de document : Article/Communication Auteurs : Yanbiao Sun, Auteur ; Stuart Robson, Auteur ; Daniel Scott, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 172 - 184 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes descripteurs IGN] angle azimutal [Termes descripteurs IGN] angle vertical [Termes descripteurs IGN] compensation par faisceaux [Termes descripteurs IGN] coordonnées horizontales [Termes descripteurs IGN] extraction de traits caractéristiques [Termes descripteurs IGN] forme linéaire [Termes descripteurs IGN] image aérienne [Termes descripteurs IGN] ligne caractéristique [Termes descripteurs IGN] orientation d'image [Termes descripteurs IGN] orientation du capteur [Termes descripteurs IGN] point d'appui Résumé : (Auteur) To improve the accuracy of sensor orientation using calibrated aerial images, this paper proposes an automatic sensor orientation method utilizing horizontal and vertical constraints on human-engineered structures, addressing the limitations faced with sub-optimal number of Ground Control Points (GCPs) within a scene. Related state-of-the-art methods rely on structured building edges, and necessitate manual identification of end points. Our method makes use of line-segments but eliminates the need for these matched end points, thus eliminating the need for inefficient manual intervention. To achieve this, a 3D line in object space is represented by the intersection of two planes going through two camera centers. The normal vector of each plane can be written as a function of a pair of azimuth and elevations angles. The normal vector of the 3D line can be expressed by the cross product of these two plane’s normal vectors. Then, we create observation functions of horizontal and vertical line constraints based on the zero-vector cross-product and the dot-product of the normal vector of the 3D lines. The observation functions of the horizontal and vertical lines are then introduced into a hybrid Bundle Adjustment (BA) method as constraints, including observed image points as well as observed line segment projections. Finally, to assess the feasibility and effectiveness of the proposed method, simulated and real data are tested. The results demonstrate that, in cases with only 3 GCPs, the accuracy of the proposed method utilizing line features extracted automatically, is increased by 50%, compared to a BA using only point constraints. Numéro de notice : A2019-140 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2019.02.011 date de publication en ligne : 28/02/2019 En ligne : https://doi.org/10.1016/j.isprsjprs.2019.02.011 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92478 [article]

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Disaster debris estimation using high-resolution polarimetric stereo-SAR / Christian N. Koyama in ISPRS Journal of photogrammetry and remote sensing, vol 120 (october 2016)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 120 (october 2016) . - pp 84 - 98 Titre : Disaster debris estimation using high-resolution polarimetric stereo-SAR Type de document : Article/Communication Auteurs : Christian N. Koyama, Auteur ; Hideomi Gokon, Auteur ; Masaru Jimbo, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 84 - 98 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes descripteurs IGN] catastrophe naturelle [Termes descripteurs IGN] déchet [Termes descripteurs IGN] estimation statistique [Termes descripteurs IGN] hauteur (coordonnée) [Termes descripteurs IGN] image radar moirée [Termes descripteurs IGN] Japon [Termes descripteurs IGN] modèle stéréoscopique [Termes descripteurs IGN] séisme [Termes descripteurs IGN] volume (grandeur) Résumé : (Auteur) This paper addresses the problem of debris estimation which is one of the most important initial challenges in the wake of a disaster like the Great East Japan Earthquake and Tsunami. Reasonable estimates of the debris have to be made available to decision makers as quickly as possible. Current approaches to obtain this information are far from being optimal as they usually rely on manual interpretation of optical imagery. We have developed a novel approach for the estimation of tsunami debris pile heights and volumes for improved emergency response. The method is based on a stereo-synthetic aperture radar (stereo-SAR) approach for very high-resolution polarimetric SAR. An advanced gradient-based optical-flow estimation technique is applied for optimal image coregistration of the low-coherence non-interferometric data resulting from the illumination from opposite directions and in different polarizations. By applying model based decomposition of the coherency matrix, only the odd bounce scattering contributions are used to optimize echo time computation. The method exclusively considers the relative height differences from the top of the piles to their base to achieve a very fine resolution in height estimation. To define the base, a reference point on non-debris-covered ground surface is located adjacent to the debris pile targets by exploiting the polarimetric scattering information. The proposed technique is validated using in situ data of real tsunami debris taken on a temporary debris management site in the tsunami affected area near Sendai city, Japan. The estimated height error is smaller than 0.6 m RMSE. The good quality of derived pile heights allows for a voxel-based estimation of debris volumes with a RMSE of 1099 m3. Advantages of the proposed method are fast computation time, and robust height and volume estimation of debris piles without the need for pre-event data or auxiliary information like DEM, topographic maps or GCPs. Numéro de notice : A2016-796 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2016.08.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82530 [article]

A practical target recognition system for close range photogrammetry / M.R. Shortis in Photogrammetric record, vol 29 n° 147 (September - November 2014)

Public [article]  inPhotogrammetric record > vol 29 n° 147 (September - November 2014) . - pp 337 - 355 Titre : A practical target recognition system for close range photogrammetry Type de document : Article/Communication Auteurs : M.R. Shortis, Auteur ; J.W. Seager, Auteur Année de publication : 2014 Article en page(s) : pp 337 - 355 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes descripteurs IGN] coordonnées polaires [Termes descripteurs IGN] détection automatique [Termes descripteurs IGN] détection de cible [Termes descripteurs IGN] photogrammétrie terrestre Résumé : (Auteur)This paper presents details of a coded target system that employs polar coordinate transformation and segment matching to automatically recognise and identify targets in digital images. The code system is based on a square surrounding the central circular target and is described at a level of detail that would allow the system to be readily duplicated. Pre-detection processes, developed to improve the success rate under unfavourable conditions, and the tests conducted to validate a correct target match, are described. Finally, the paper includes some examples of the use of the coded targets, drawn from a variety of calibration and measurement applications. Numéro de notice : A2014-92 Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74081 [article]

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Integrating disparate lidar data at the national scale to assess the relationships between height above ground, land cover and ecoregions / Jason M. Stocker in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 1 (January 2014)

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 80 n° 1 (January 2014) . - pp 59 - 70 Titre : Integrating disparate lidar data at the national scale to assess the relationships between height above ground, land cover and ecoregions Type de document : Article/Communication Auteurs : Jason M. Stocker, Auteur ; Mark A. Cochrane, Auteur ; David P. Roy, Auteur Année de publication : 2014 Article en page(s) : pp 59 - 70 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes descripteurs IGN] analyse comparative [Termes descripteurs IGN] base de données localisées [Termes descripteurs IGN] données lidar [Termes descripteurs IGN] hauteur (coordonnée) [Termes descripteurs IGN] intégration de données [Termes descripteurs IGN] occupation du sol [Termes descripteurs IGN] régression linéaire [Termes descripteurs IGN] United States Geological Survey Résumé : (Auteur) With the acquisition of lidar data for over 30 percent of the US, it is now possible to assess the three-dimensional distribution of features at the national scale. This paper integrates over 350 billion lidar points from 28 disparate datasets into a national-scale database and evaluates if height above ground is an important variable in the context of other national-scale layers, such as the US Geological Survey National Land Cover Database and the US Environmental Protection Agency ecoregions maps. While the results were not homoscedastic and the available data did not allow for a complete height census in any of the classes, it does appear that where lidar data were used, there were detectable differences in heights among many of these national classification schemes. This study supports the hypothesis that there were real, detectable differences in heights in certain national-scale classification schemes, despite height not being a variable used in any of the classification routines. Numéro de notice : A2014-092 Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32997 [article]

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Galileo altimetry using AltBOC and RTK techniques / Jürgen Dampf in Inside GNSS, vol 8 n° 1 (January - February 2013) 

Public [article]  inInside GNSS > vol 8 n° 1 (January - February 2013) . - pp 54 - 63 Titre : Galileo altimetry using AltBOC and RTK techniques Type de document : Article/Communication Auteurs : Jürgen Dampf, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 54 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes descripteurs IGN] hauteur (coordonnée) [Termes descripteurs IGN] réflectométrie par GNSS [Termes descripteurs IGN] résolution d'ambiguïté [Termes descripteurs IGN] signal Galileo Résumé : (Auteur) Reflectometry systems analyze reflected GNSS signals to investigate properties of the reflecting surface and to derive various parameters from that surface. The emergence of additional GNSS systems has increased the availability of multiple signals on multiple frequencies, which provides the opportunity for developing new techniques for applying reflectometry. This article describes an E1/E5a/E5b ground-based altimetry application that has been tested with Galileo signals. The innovative aspect of this system resolves carrier phase ambiguities as in RTK positioning to achieve millimeter accurate surface height measurements, including the use of Galileo AltBOC code measurements for instantaneous decimeter accurate height values. New applications enabled by this technique may include monitoring of large buildings, landslides, or precision passive radar. Numéro de notice : A2013-166 Thématique : POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32304 [article]

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Cartes, boussoles et GPS / Jean-Marc Lord (2012)

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La navigation saharienne avant le GPS : seconde partie : Le compas solaire Abrams et astronomie de position / Paul Courbon in XYZ, n° 126 (mars - mai 2011)

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Annuaire du Bureau des longitudes, Guide de données astronomiques 2012 pour l'observation du ciel / Bureau des longitudes (2011)

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La navigation saharienne avant le GPS. Première partie : les compas solaires analemmatiques de Tételin / Raymond d' Hollander in XYZ, n° 125 (décembre 2010 - février 2011)

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Annuaire du Bureau des longitudes, Guide de données astronomiques 2011 pour l'observation du ciel / Bureau des longitudes (2010)

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Annuaire du Bureau des Longitudes, Guide de données astronomiques 2010, pour l'observation du ciel / Bureau des longitudes (2009)

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Annuaire du Bureau des Longitudes, Guide de données astronomiques 2009, pour l'observation du ciel / Bureau des longitudes (2008)

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DTM generation from Ikonos in-track stereo images using a 3D physical model / Thierry Toutin in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 6 (June 2004)

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Outline of the new japenese geodetic system (Bulletin de Bulletin of the Geographical survey institute) / Geographical survey institute

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