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Development and evaluation of GNSS/INS data processing software for position and orientation systems / X. Niu in Survey review, vol 47 n° 341 (March 2015)  

Public [article]  inSurvey review > vol 47 n° 341 (March 2015) . - pp 87 - 98 Titre : Development and evaluation of GNSS/INS data processing software for position and orientation systems Type de document : Article/Communication Auteurs : X. Niu, Auteur ; Qian Zhang, Auteur ; L. Gong, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 87 - 98 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] centrale inertielle à composants liés [Termes IGN] couplage GNSS-INS [Termes IGN] filtre de Kalman [Termes IGN] logiciel de post-traitement GPS [Termes IGN] traitement de données GNSS [Vedettes matières IGN] Traitement de données GNSS Résumé : (auteur) Currently there are limited supportive and reliable commercial software packages for GNSS/INS data processing. The shortage of compatible GNSS/INS data processing software has become a bottleneck in the development of position and orientation systems (POS) for survey and mapping applications. Thus this paper introduces a GNSS/INS data processing software called Cinertial, which has been recently developed in China, with open definitions of data format and parameters. The algorithm design of the software is described in detail, including the realisation of INS mechanisation, Kalman filtering, and backward smoothing. The developed software is tested and evaluated by comparing it with mainstream commercial software through processing the same field test datasets. A precise and feasible comparison procedure is proposed in the paper, so as to evaluate the quality of any new POS software in an efficient, convenient, and cost-effective way. The procedure was applied to compare our new software with two well known commercial software packages through processing airborne and terrestrial datasets respectively. The results show that the new software can achieve the same level of accuracy as the current commercial software on the market, which reflects a new progress of the POS development in China. Numéro de notice : A2015-956 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270614Y.0000000099 En ligne : http://www.tandfonline.com/doi/full/10.1179/1752270614Y.0000000099 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79941 [article]

Spectral-angle-based Laplacian Eigenmaps for non linear dimensionality reduction of hyperspectral imagery / L. Yan in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 9 (September 2014)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 80 n° 9 (September 2014) . - pp 849 - 861 Titre : Spectral-angle-based Laplacian Eigenmaps for non linear dimensionality reduction of hyperspectral imagery Type de document : Article/Communication Auteurs : L. Yan, Auteur ; X. Niu, Auteur Année de publication : 2014 Article en page(s) : pp 849 - 861 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] angle d'incidence [Termes IGN] classification Spectral angle mapper [Termes IGN] détection de cible [Termes IGN] distance euclidienne [Termes IGN] image hyperspectrale [Termes IGN] réduction [Termes IGN] réflectance spectrale [Termes IGN] végétation Résumé : In traditional manifold learning of hyperspectral imagery, distances among pixels are defined in terms of Euclidean distance, which is not necessarilly the best choice because of its sensitivity to variations in spectrum magnitudes. Selecting Laplacian Eignemaps (LE) as the test method, this paper studies the effects of distance metric selection in LE and proposes a spectral-angle-based LE method (LE-SA)to be compared against the traditional LE-based on Euclidean distance (LE-ED). Le-SA and LA-ED were applied to two airborne hyperspectral data sets and the dimensionlity-reduced data were quantitatively evalueted. Experimental results demonstrated that LE-SA is able to suppress the variations within the same type of features, such as variations in vegetation and those in illuminations due to shade orientations, and maintain a higher level of overall separability among different features than LE-ED. Further, the potential usage of a single LA-SA or LE-ED band for target detection is discussed. Numéro de notice : A2014-598 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.80.9.849 En ligne : https://doi.org/10.14358/PERS.80.9.849 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74888 [article]

Geometric integration of aerial and high-resolution satellite imagery and application in shoreline mapping / R. Li in Marine geodesy, vol 31 n° 3 (September - November 2008)  

Public [article]  inMarine geodesy > vol 31 n° 3 (September - November 2008) . - pp 143 - 159 Titre : Geometric integration of aerial and high-resolution satellite imagery and application in shoreline mapping Type de document : Article/Communication Auteurs : R. Li, Auteur ; S. Deshpande, Auteur ; X. Niu, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 143 - 159 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] Floride (Etats-Unis) [Termes IGN] fusion d'images [Termes IGN] géoréférencement [Termes IGN] image à très haute résolution [Termes IGN] image aérienne [Termes IGN] image Ikonos [Termes IGN] image Quickbird [Termes IGN] précision de localisation [Termes IGN] stéréoscopie [Termes IGN] trait de côte Résumé : (Auteur) This paper investigates the geopositioning accuracy achievable from integrating IKONOS and QuickBird satellite stereo image pairs with aerial images acquired over a region at Tampa Bay, Florida. The results showed that the accuracy is related to a few factors of imaging geometry. For example, the geopositioning accuracy of a stereo pair of IKONOS or QuickBird images can be improved by integrating a set of aerial images, even just a single aerial image or a stereo pair of aerial images. Shorelines derived from the IKONOS and QuickBird stereo images, particularly the vertical positions, are compared with the corresponding observations of water-penetrating LiDAR and water gauge stations and proved that differences are within the limit of the geopositioning uncertainty of the satellite images. Copyright Taylor & Francis Numéro de notice : A2008-498 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/01490410802265310 En ligne : https://doi.org/10.1080/01490410802265310 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29567 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
230-08031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Integration of Ikonos and Quickbird imagery for geopositioning accuracy analysis / R. Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 9 (September 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 9 (September 2007) . - pp 1067 - 1074 Titre : Integration of Ikonos and Quickbird imagery for geopositioning accuracy analysis Type de document : Article/Communication Auteurs : R. Li, Auteur ; F. Zhou, Auteur ; X. Niu, Auteur ; K. Di, Auteur Année de publication : 2007 Article en page(s) : pp 1067 - 1074 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] couple stéréoscopique [Termes IGN] données de terrain [Termes IGN] Floride (Etats-Unis) [Termes IGN] fusion d'images [Termes IGN] géopositionnement tridimensionnel [Termes IGN] image Ikonos [Termes IGN] image Quickbird [Termes IGN] modèle par fonctions rationnelles [Termes IGN] précision géométrique (imagerie) Résumé : (Auteur) This research investigated the accuracy in three-dimensional (3D) geopositioning achieved by integrating Ikonos and QuickBird images using the vendor-provided rational polynomial coefficients (RPCs). One pair of stereo Ikonos images and one pair of stereo QuickBird images were collected for the same region of Tampa Bay, Florida, and used in this study. Results of 3D geopositioning from different combinations of Ikonos and QuickBird stereo images were generated by using an improved rational function model (RFM). The relationship between the satellite-borne pointing geometry and the attainable ground accuracy is examined. This research demonstrates that the integration of Ikonos and QuickBird images is feasible and can improve the 3D geopositioning accuracy using a proper combination of images. Copyright ASPRS Numéro de notice : A2007-414 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.researchgate.net/publication/279621130_Integration_of_Ikonos_and_Qui [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28777 [article]

vol 30 n° 1-2 - March - June 2007 - Special issue on marine and coastal GIS (Bulletin de Marine geodesy) / R. Li

Public [n° ou bulletin]  est un bulletin de Marine geodesy (1977 -)   Titre : vol 30 n° 1-2 - March - June 2007 - Special issue on marine and coastal GIS Type de document : Périodique Auteurs : R. Li, Éditeur scientifique ; X. Niu, Éditeur scientifique Année de publication : 2007 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] bathymétrie [Termes IGN] cartographie thématique [Termes IGN] eaux côtières [Termes IGN] habitat animal [Termes IGN] littoral [Termes IGN] système d'information géographique Numéro de notice : 230-0701 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=21556 [n° ou bulletin]

Contient

• Terrestrial and submerged aquatic vegetation mapping in Fire Island national seashore using high spatial resolution remote sensing data / Y. Wang in Marine geodesy, vol 30 n° 1-2 (March - June 2007)  
• Retrieval of suspended sediment from advanced hyperspectral sensor data in the Scheldt estuary at different stages in the tidal cycle / S. Sterckx in Marine geodesy, vol 30 n° 1-2 (March - June 2007)  
• A robust surface matching technique for integrated monitoring of coastal geohazards / P. Miller in Marine geodesy, vol 30 n° 1-2 (March - June 2007)  
• Design and implementation of a distributed GIS portal for oil spill and harmful algal bloom monitoring in the marine environment / E.O. Tuama in Marine geodesy, vol 30 n° 1-2 (March - June 2007)  

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
230-07011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A semi-automatic framework for highway extraction and vehicle detection based on a geometric deformable model / X. Niu in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 3-4 (December 2006)  

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Integration of mobile GIS and wireless technology for coastal management and decision-making / X. Niu in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 4 (April 2005)  

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