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Colorisation de nuages de points 3D par recalage dense d’images numériques / Nathalie Crombez in Traitement du signal, vol 31 n° 1-2 (2014-1-2)
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Titre : Colorisation de nuages de points 3D par recalage dense d’images numériques Type de document : Article/Communication Auteurs : Nathalie Crombez, Auteur ; Guillaume Caron, Auteur ; El-Mustapha Mouaddib, Auteur Année de publication : 2014 Article en page(s) : pp 81 - 106 Note générale : bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] Amiens
[Termes IGN] cathédrale
[Termes IGN] couleur (variable spectrale)
[Termes IGN] couleur à l'écran
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] image numérique
[Termes IGN] image terrestre
[Termes IGN] patrimoine immobilier
[Termes IGN] photométrie
[Termes IGN] recalage d'image
[Termes IGN] recalage de données localisées
[Termes IGN] semis de pointsRésumé : (auteur) Le patrimoine architectural est composé de biens historiques et artistiques qui doivent être protégés, préservés, restaurés et exposés au plus grand nombre. Des appareils modernes tels que les scanners à laser 3D sont de plus en plus utilisés en documentation culturelle. Ces outils permettent de générer avec précision et rapidité des nuages de points de monuments historiques. Avec les données collectées, il est possible de créer un maillage afin de visualiser virtuellement les formes et/ou la surface de l’édifice. La plupart du temps, le scanner tridimensionnel est équipé d’un appareil photo numérique qui est utilisé pour coloriser les points relevés. Cependant, la qualité photométrique du nuage de points n’est pas toujours suffisante principalement à cause de problèmes de couleurs et de résolution. Des méthodes d’uniformisation d’intensités existent pour améliorer la colorimétrie mais ne permettent pas d’obtenir des rendus photo-réalistes et d’améliorer la résolution. C’est pourquoi, nous proposons une nouvelle méthode pour coloriser les nuages de points à l’aide d’images numériques de haute résolution acquises avec un appareil photo. Pour cela, nous avons développé une méthode permettant d’obtenir un recalage précis entre des images numériques acquises et un nuage de points, ce qui est une étape cruciale pour une bonne colorisation par projection de couleurs. Des résultats sur des jeux de données issus de la numérisation de la cathédrale d’Amiens à l’intérieur et à l’extérieur démontrent la validité de notre approche en obtenant des nuages de points de qualité et de résolution photométriques nettement meilleures. Numéro de notice : A2014-456 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.3166/TS.31.81-10 En ligne : http://gretsi.fr/data/ts/pdf/2014_31_1_70248_1.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80832
in Traitement du signal > vol 31 n° 1-2 (2014-1-2) . - pp 81 - 106[article]Detecting subcanopy invasive plant species in tropical rainforest by integrating optical and microwave (InSAR/PolInSAR) remote sensing data, and a decision tree algorithm / Abduwasit Ghulam in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)
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Titre : Detecting subcanopy invasive plant species in tropical rainforest by integrating optical and microwave (InSAR/PolInSAR) remote sensing data, and a decision tree algorithm Type de document : Article/Communication Auteurs : Abduwasit Ghulam, Auteur ; Ingrid Porton, Auteur ; Karen Freeman, Auteur Année de publication : 2014 Article en page(s) : pp 174 - 192 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image mixte
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] arbre de décision
[Termes IGN] espèce exotique envahissante
[Termes IGN] extraction de la végétation
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] forêt équatoriale
[Termes IGN] hauteur des arbres
[Termes IGN] image optique
[Termes IGN] image radar
[Termes IGN] intégration de données
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] Madagascar
[Termes IGN] polarimétrie radar
[Termes IGN] réserve naturelle
[Termes IGN] sous-boisRésumé : (Auteur) In this paper, we propose a decision tree algorithm to characterize spatial extent and spectral features of invasive plant species (i.e., guava, Madagascar cardamom, and Molucca raspberry) in tropical rainforests by integrating datasets from passive and active remote sensing sensors. The decision tree algorithm is based on a number of input variables including matching score and infeasibility images from Mixture Tuned Matched Filtering (MTMF), land-cover maps, tree height information derived from high resolution stereo imagery, polarimetric feature images, Radar Forest Degradation Index (RFDI), polarimetric and InSAR coherence and phase difference images. Spatial distributions of the study organisms are mapped using pixel-based Winner-Takes-All (WTA) algorithm, object oriented feature extraction, spectral unmixing, and compared with the newly developed decision tree approach. Our results show that the InSAR phase difference and PolInSAR HH–VV coherence images of L-band PALSAR data are the most important variables following the MTMF outputs in mapping subcanopy invasive plant species in tropical rainforest. We also show that the three types of invasive plants alone occupy about 17.6% of the Betampona Nature Reserve (BNR) while mixed forest, shrubland and grassland areas are summed to 11.9% of the reserve. This work presents the first systematic attempt to evaluate forest degradation, habitat quality and invasive plant statistics in the BNR, and provides significant insights as to management strategies for the control of invasive plants and conversation in the reserve. Numéro de notice : A2014-090 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.12.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.12.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32995
in ISPRS Journal of photogrammetry and remote sensing > vol 88 (February 2014) . - pp 174 - 192[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2014021 RAB Revue Centre de documentation En réserve L003 Disponible A fully constrained linear spectral unmixing algorithm based on distance geometry / Hanye Pu in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
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Titre : A fully constrained linear spectral unmixing algorithm based on distance geometry Type de document : Article/Communication Auteurs : Hanye Pu, Auteur ; Wei Xia, Auteur ; Bin Wang, Auteur ; Geng-Ming Jiang, Auteur Année de publication : 2014 Article en page(s) : pp 1157 - 176 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] contrainte géométrique
[Termes IGN] distance euclidienne
[Termes IGN] estimation statistique
[Termes IGN] méthode de Monte-CarloRésumé : (Auteur) Under the linear spectral mixture model, hyperspectral unmixing can be considered as a convex geometry problem, in which the endmembers are located in the vertices of simplex enclosing the hyperspectral data set and the barycentric coordinates of observation pixels with respect to the simplex correspond to the abundances of endmembers. Based on distance geometry theory, in this paper we propose a new approach for abundance estimation of mixed pixels in hyperspectral images. With the endmember signatures, which is known a priori or can be obtained from the endmember extraction algorithms, the proposed method automatically estimates the abundances of endmembers at each pixel using convex geometry concepts and distance geometry constraints. In the algorithm, denoting the pairwise distances with Cayley-Menger matrix makes it easy to calculate the barycentric coordinates of the observation pixels. Another characteristic of this algorithm is that the optimal estimated points of observation pixels as well as the least distortion in geometric structure of original data set can be obtained with the distance geometry constraint. Simultaneously, the use of barycenter of simplex builds an accurate and efficient method to estimate endmembers with zero abundance and, as a result, the subsimplex containing the estimated points is obtained. A comparative study and analysis based on Monte Carlo simulations and real data experiments is conducted among the proposed algorithm and three state-of-the-art algorithms: fully constrained least squares (FCLS), FCLS computed using constrained sparse unmixing by variable splitting and augmented Lagrangian, and simplex-projection unmixing (SPU). The experimental results show that the proposed algorithm always provides the best unmixing accuracy and when the number of endmembers is not very large the algorithm has a lower computational complexity. Numéro de notice : A2014-074 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2248013 En ligne : https://doi.org/10.1109/TGRS.2013.2248013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32979
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 2 (February 2014) . - pp 1157 - 176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2014021 RAB Revue Centre de documentation En réserve L003 Disponible Functional relation of land surface albedo with climatological variables: a review on remote sensing techniques and recent research developments / S. A. Salleh in Geocarto international, vol 29 n° 1 - 2 (February - April 2014)
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Titre : Functional relation of land surface albedo with climatological variables: a review on remote sensing techniques and recent research developments Type de document : Article/Communication Auteurs : S. A. Salleh, Auteur ; Z. Abd Latif, Auteur ; Biswajeet Pradhan, Auteur ; W. M. N. Wan Mohd, Auteur ; A. Chan, Auteur Année de publication : 2014 Article en page(s) : pp 147 - 163 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] albedo
[Termes IGN] analyse fonctionnelle (produit)
[Termes IGN] bilan radiatif
[Termes IGN] climatologie
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] données météorologiques
[Termes IGN] image satellite
[Termes IGN] modélisation radiométrique de prise de vue
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Surface albedo has been documented as one of the Essential Climate Variables (ECV) of the Global Climate Observing System (GCOS) that governs the Earth's Radiation Budget. The availability of surface albedo data is necessary for a comprehensive environmental modelling study. Thus, both temporal and spatial scale issues need to be rectified. This study reports about the availability of surface albedo data through in-situ and remote sensing satellite observations. In this paper, we reviewed the existing models for surface albedo derivation and various initiatives taken by related environmental agencies in order to understand the issues of climate with respect to surface albedo. This investigation evaluated the major activities on albedo-related research specifically for the retrieval methods used to derive the albedo values. Two main existing albedo measurement methods are derived through in-situ measurement and remotely sensed observations. In-situ measurement supported with number of instruments and techniques such aspyrheliometers, pyranometers and Baseline Surface Radiation Network (BSRN) and remotely sensed observations using angularly integrated Bi-directional Reflectance Distribution Function (BRDF) by both geostationary and polar orbit satellites. The investigation results reveals that the temporal and spatial scaling is the major issues when the albedo values are needed for microclimatic study, i.e. high-resolution time-series analyses and at heterogeneity and impervious surface. Thus, an improved technique of albedo retrieval at better spatial and temporal scale is required to fulfil the need for such kind of studies. Amongst many others, there are two downscaling methods that have been identified to be used in resolving the spatial scaling biased issues: Smoothing Filter-based Intensity Modulation (SFIM) and Pixel Block Intensity Modulation (PBIM). The temporal issues can be resolved using the multiple regression techniques of land surface temperature, selected air quality parameters, aerosol and daily skylight. Numéro de notice : A2014-236 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2012.748831 Date de publication en ligne : 06/02/2013 En ligne : https://doi.org/10.1080/10106049.2012.748831 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33139
in Geocarto international > vol 29 n° 1 - 2 (February - April 2014) . - pp 147 - 163[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Generation and quality assessment of stereo-extracted DSM from Geoeye-1 and Worldview-2 imagery / Manuel Angel Aguilar in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
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Titre : Generation and quality assessment of stereo-extracted DSM from Geoeye-1 and Worldview-2 imagery Type de document : Article/Communication Auteurs : Manuel Angel Aguilar, Auteur ; Maria Del Mar Saldana, Auteur ; Fernando José Aguilar, Auteur Année de publication : 2014 Article en page(s) : pp 1259 - 1271 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] image Geoeye
[Termes IGN] image Worldview
[Termes IGN] modèle numérique de surface
[Termes IGN] qualité des donnéesRésumé : (Auteur) Digital surface models (DSMs) extracted from 15 different stereo pairs attained by the combination of GeoEye-1 (GE1) and WorldView-2 (WV2) panchromatic very high resolution (VHR) satellite images are tested. Two of them are pure same-date along-track stereo pairs, one from each VHR satellite, whereas the rest are mixed multidate across-track ones. A quality assessment on the DSMs extracted from the aforementioned stereo pairs, involving both accuracy and completeness, is carried out. Several factors are tested such as sensor model used in the bundle adjustment, number of ground control points (GCPs), radiometric characteristics, satellite imaging geometry, time between acquisition dates, and target land cover. A highly accurate light detection and ranging elevation data is used as ground truth. Overall, 3-D rational functions refined by a zero-order polynomial adjustment by using 7 or 12 GCPs performed slightly better regarding both DSM vertical accuracy and completeness. In relation to the pure stereo pairs, the DSM extracted from the GE1 stereo pair attained better vertical accuracy over the whole study area (90th percentile linear error, LE90, of 2.04 m) but lower completeness (74.50%) than the WV2 one (2.56 m and 83.35%, respectively). The undergoing hypothesis is that the blurrier images from WV2 could have influenced in the improvement of the matching success rate while reducing the vertical accuracy of extracted points. When all the 15 stereo pairs are considered, the vertical accuracy mainly depends on the convergence angle. In addition, the temporal difference between acquisition dates turned out to be the most influential factor regarding completeness values. Numéro de notice : A2014-079 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2249521 Date de publication en ligne : 23/04/2013 En ligne : https://doi.org/10.1109/TGRS.2013.2249521 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32984
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 2 (February 2014) . - pp 1259 - 1271[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2014021 RAB Revue Centre de documentation En réserve L003 Disponible A GIHS-based spectral preservation fusion method for remote sensing images using edge restored spectral modulation / Xiran Zhou in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)
PermalinkLandscape preference and map readability in design evaluation of topographic maps with an orthoimage background / Paulo Raposo in Cartographic journal (the), vol 51 n° 1 (February 2014)
PermalinkManaging Germany's big imagery data / Mladen Stojic in GEO: Geoconnexion international, vol 13 n° 2 (february 2014)
PermalinkMeasuring deformations using SAR interferometry and GPS observables with geodetic accuracy: Application to Tokyo, Japan / Tamer Elgarbawi in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)
PermalinkModel-based analysis–synthesis for realistic tree reconstruction and growth simulation / Corina Iovan in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
PermalinkModeling and sensing the vertical structure of the atmospheric path delay by microwave radiometry to correct SAR interferograms / Patrizia Basili in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
PermalinkMulti-agent recognition system based on object based image analysis using WorldView-2 / Fatemeh Tabib Mahmoudi in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 2 (February 2014)
PermalinkMultiagent object-based classifier for high spatial resolution imagery / Yanfei Zhong in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
PermalinkMultiple-entity based classification of airborne laser scanning data in urban areas / S. Xu in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)
PermalinkNonlinear unmixing of hyperspectral data using semi-nonnegative matrix factorization / Naoto Yokoya in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
PermalinkPhotogrammetry or lidar? / Fabrice Marre in GEO: Geoconnexion international, vol 13 n° 2 (february 2014)
PermalinkPlusieurs scanners pour surveiller une rampe / Vincent Barras in Géomatique suisse, vol 112 n° 2 (01/02/2014)
PermalinkPutting stock in your survey / Bernard Draeyer in GEO: Geoconnexion international, vol 13 n° 2 (february 2014)
PermalinkStructured sparse method for hyperspectral unmixing / Feiyun Zhu in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)
PermalinkStudy on the polarimetric characteristics of the Lop Nur arid area using PolSAR data / Zhihong Gao in Journal of applied remote sensing, vol 8 (2014)
PermalinkThree-dimensional phase unwrapping for satellite radar interferometry, 1 : DEM generation / Batuhan Osmanoglu in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
PermalinkPermalinkA triangular form-based multiple flow algorithm to estimate overland flow distribution and accumulation on a digital elevation model / Petter Pilesjö in Transactions in GIS, vol 18 n° 1 (February 2014)
PermalinkPermalinkAnalysing landmarks in nature and elements of geospatial images to support wayfinding / Pyry Kettunen (2014)
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