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The effect of scene elevation on the coherence of wide-angle crossing-node SAR pairs / T.M. Payne in IEEE Transactions on geoscience and remote sensing, vol 42 n° 3 (March 2004)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 42 n° 3 (March 2004) . - pp 520 - 528 Titre : The effect of scene elevation on the coherence of wide-angle crossing-node SAR pairs Type de document : Article/Communication Auteurs : T.M. Payne, Auteur Année de publication : 2004 Article en page(s) : pp 520 - 528 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] correction angulaire [Termes IGN] erreur géométrique [Termes IGN] image radar moirée [Termes IGN] réflectivité [Termes IGN] scène [Termes IGN] tomographie Résumé : (Auteur) The interference between two radar images, acquired from approximately the same location, has a number of uses. In particular, the literature abounds with examples of coherent change detection (CCD) and interferometric synthetic aperture radar (InSAR) uses that, respectively, enable the detection of small changes and the extraction of terrain elevation. In almost all of these examples, collections have been deliberately constrained so that they have almost identical collection geometries. Details of the variation in geometry have been analyzed extensively but generally only with respect to variation in the mean grazing angle. Much of this variation is due to the angular variation in the scene reflectivity; however, when collection geometries differ in other respects, the reduction in performance cannot be entirely explained by angular variations alone. This paper identifies a source of performance degradation when the collection geometries are different for scenes containing local relief. The error is due to approximations during image formation that both the collection geometry and the terrain are flat. The effect of these errors is derived as a blurring kernel to the true scene. The impact of the blurring is then assessed in the interferometric case and broken into common and differential blurring terms to facilitate the impact of some special cases and to explain why the parallel-pass geometry works as well as it does even though the true three-dimensional nature of the collection and the ground are ignored. Numéro de notice : A2004-154 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.819879 En ligne : https://doi.org/10.1109/TGRS.2003.819879 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26681 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-04031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Reducing the dimensionality of plant spectral databases / I.E. Bell in IEEE Transactions on geoscience and remote sensing, vol 42 n° 3 (March 2004)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 42 n° 3 (March 2004) . - pp 570 - 576 Titre : Reducing the dimensionality of plant spectral databases Type de document : Article/Communication Auteurs : I.E. Bell, Auteur ; V.G. Baranoski, Auteur Année de publication : 2004 Article en page(s) : pp 570 - 576 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse en composantes principales [Termes IGN] base de données [Termes IGN] biologie [Termes IGN] réflectance végétale [Termes IGN] transmittance [Termes IGN] végétation Résumé : (Auteur) Ground-based measurements of plant reflectance and transmittance are essential for remote sensing projects oriented toward agriculture, forestry, and ecology. This paper examines the application of principal components analysis (PCA) in the storage and reconstruction of such plant spectral data. A novel piecewise PCA approach (PPCA), which takes into account the biological factors that affect the interaction of solar radiation with plants, is also proposed. These techniques are compared through experiments involving the reconstruction of reflectance and transmittance curves for herbaceous and woody specimens. The spectral data used in these experiments were obtained from the Leaf Optical Properties Experiment (LOPEX) database. The reconstructions were performed aiming at a root-mean-square error (RMSE) lower than 1%. The results of these experiments indicate that PCA can effectively reduce the dimensionality of plant spectral databases from the visible to the infrared regions of the light spectrum, and that the PPCA approach can further maximize the accuracy/cost ratio of the storage and reconstruction of plant spectral reflectance and transmittance data. Numéro de notice : A2004-155 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.821697 En ligne : https://doi.org/10.1109/TGRS.2003.821697 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26682 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-04031	RAB	Revue	Centre de documentation	En réserve L003	Disponible