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Fusion of multispectral and panchromatic images using a restoration-based method / Z. Li in IEEE Transactions on geoscience and remote sensing, vol 47 n° 5 (May 2009)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 47 n° 5 (May 2009) . - pp 1482 - 1491 Titre : Fusion of multispectral and panchromatic images using a restoration-based method Type de document : Article/Communication Auteurs : Z. Li, Auteur ; Henry Leung, Auteur Année de publication : 2009 Article en page(s) : pp 1482 - 1491 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] fusion d'images [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] résolution multiple [Termes IGN] restauration d'image Résumé : (Auteur) Many remote-sensing satellites can obtain images in multispectral and panchromatic bands. By fusing low-resolution multispectral and high-resolution panchromatic images, one can obtain high-resolution multispectral images. In this paper, an image fusion algorithm based on image restoration is proposed to combine multispectral and panchromatic images. For remote-sensing satellites, the wavelength of the panchromatic band usually covers the wavelengths of the multispectral bands. This relationship between the two kinds of images is useful for fusion. In our approach, the low-resolution multispectral images are first resampled to the scale of the high-resolution panchromatic image. The relationship between these two kinds of images is then used to restore the resampled multispectral images. That is, the resampled multispectral images are modeled as the noisy blurred versions of the ideal multispectral images, and the high-resolution panchromatic image is modeled as a linear combination of the ideal multispectral images plus the observation noise. The ideal high-resolution multispectral images are then estimated based on the panchromatic and the resampled multispectral images. A closed-form solution of the fused images is derived here. Experiments show that the proposed fusion algorithm works effectively in integrating multispectral and panchromatic images. Copyright IEEE Numéro de notice : A2009-149 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2008.2005639 En ligne : https://doi.org/10.1109/TGRS.2008.2005639 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29779 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-09051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Eight times acceleration of geospatial data archiving and distribution on the grids / F. Wang in IEEE Transactions on geoscience and remote sensing, vol 47 n° 5 (May 2009)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 47 n° 5 (May 2009) . - pp 1444 - 1453 Titre : Eight times acceleration of geospatial data archiving and distribution on the grids Type de document : Article/Communication Auteurs : F. Wang, Auteur ; N. Helian, Auteur ; S. Wu, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 1444 - 1453 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] archivage électronique [Termes IGN] diffusion de données [Termes IGN] données localisées 3D [Termes IGN] protocole [Termes IGN] Web Processing Service Résumé : (Auteur) A grid-powered Web Geographical Information Science (GIS)/Web Processing Service (WPS) system has been developed for archiving and distributing large volumes of geospatial data. However, users, WPS servers, and data resources are always distributed across different locations, attempting to access and archive geospatial data from a GIS survey via conventional Hypertext Transport Protocol, Network File System Protocol, and File Transfer Protocol, which often encounters long waits and frustration in wide area network (WAN) environments. To provide a ldquolocal-likerdquo performance, a WAN/grid-optimized protocol known as ldquoGridJetrdquo developed at our lab was used as the underlying engine between WPS servers and clients, which utilizes a wide range of technologies including the one of paralleling the remote file access. No change in the way of using software is required since the multistreamed GridJet protocol remains fully compatible with the existing IP infrastructures. Our recent progress includes a real-world test that PyWPS and Google Earth over the GridJet protocol beat those over the classic ones by a factor of two to eight, where the distribution/archiving distance is over 10 000 km. Copyright IEEE Numéro de notice : A2009-150 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2008.2010055 En ligne : https://doi.org/10.1109/TGRS.2008.2010055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29780 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-09051	RAB	Revue	Centre de documentation	En réserve L003	Disponible