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Bidirectional NDVI and atmospherically resistant BRDF inversion for vegetation canopy / F. Gao in IEEE Transactions on geoscience and remote sensing, vol 40 n° 6 (June 2002)
[article]
Titre : Bidirectional NDVI and atmospherically resistant BRDF inversion for vegetation canopy Type de document : Article/Communication Auteurs : F. Gao, Auteur ; Y.J. Xiaowen, Auteur ; C.B. Schaaf, Auteur ; A. Strahler, Auteur Année de publication : 2002 Article en page(s) : pp 1269 - 1278 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] bande infrarouge
[Termes IGN] bande rouge
[Termes IGN] canopée
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] éclairement lumineux
[Termes IGN] image optique
[Termes IGN] image Terra-MODIS
[Termes IGN] inversion
[Termes IGN] modèle physique
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] spectroradiométrieRésumé : (Auteur) The normalized difference vegetation index (NDVI) has been widely applied in optical remote sensing. However, it has been demonstrated that NDVI is still partially affected by atmospheric path scattering and bidirectional (illumination and viewing geometry) effects. In this paper we present the benefit of using a bidirectional NDVI, and we discuss the problems in using the maximum NDVI composite method. Based on the assumption that a clear day has a larger NDVI value and a cloudy day has a smaller NDVI value (smaller reflectance in the nearinfrared band and larger reflectance in red band due to atmospheric path scattering), the ratio of squared observed NDVI values and calculated NDVI values is used as a weight in our inversion method. The calculated NDVI values are derived from previously inverted bidirectional reflectance distribution functions (BRDFs). The inversion process will loop until all weights converge. Our research on the early Terra/MODIS data using a semiempirical kerneldriven BRDF model (the RossThickLiTransit model) shows that this new method can improve inversion results whenever some cloudy pixels are not filtered out. As cloud detection and subpixel cloudiness are always a problem, this technique should still be very useful in improving the quality of BRDF inversion. Numéro de notice : A2002-187 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.800241 En ligne : https://ieeexplore.ieee.org/document/1020259 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22102
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 6 (June 2002) . - pp 1269 - 1278[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-02061 RAB Revue Centre de documentation En réserve L003 Disponible 065-02062 RAB Revue Centre de documentation En réserve L003 Disponible Inundation discriminated using sun glint / V.C. Vanderbilt in IEEE Transactions on geoscience and remote sensing, vol 40 n° 6 (June 2002)
[article]
Titre : Inundation discriminated using sun glint Type de document : Article/Communication Auteurs : V.C. Vanderbilt, Auteur ; G Perry, Auteur ; G.P. Livingston, Auteur ; S.L. Ustin, Auteur ; et al., Auteur Année de publication : 2002 Article en page(s) : pp 1279 - 1287 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] bande rouge
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] inondation
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] POLarization and Directionality of Earth's Reflectances
[Termes IGN] réflectance végétale
[Termes IGN] télédétection spatiale
[Termes IGN] zone inondableRésumé : (Auteur) Inundation is linked to water, carbon, and energy budgets at landscape to global scales. We describe a new remote sensing technique for identifying inundated areas based on the properties of the glitterthe strong, angular signature reflection that is characteristic of surface water and uncharacteristic of other cover types. We discriminated three cover types vegetation emergent above inundated soils, open water, and noninundated cover types from analysis of directional data collected in the red spectral band by the airborne POLDER (polarization and directionality of earth's reflectance) sensor. We found that values of the normalized difference vegetation index (NDVI) decreased dramatically in the glitter direction, providing an indication of surface water. Application of our new technique holds promise for mapping the seasonal and interannual extent of inundation, a key descriptor of wetlands hydrology. Numéro de notice : A2002-188 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.800233 En ligne : https://doi.org/10.1109/TGRS.2002.800233 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22103
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 6 (June 2002) . - pp 1279 - 1287[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-02061 RAB Revue Centre de documentation En réserve L003 Disponible 065-02062 RAB Revue Centre de documentation En réserve L003 Disponible Relationship between plant spectral reflectances and their image tonal responses on aerial photographs / D.E. Escobar in Geocarto international, vol 17 n° 2 (June - August 2002)
[article]
Titre : Relationship between plant spectral reflectances and their image tonal responses on aerial photographs Type de document : Article/Communication Auteurs : D.E. Escobar, Auteur ; James H. Everitt, Auteur ; M.R. Davis, Auteur ; R.S. Fletcher, Auteur ; C. Yang, Auteur Année de publication : 2002 Article en page(s) : pp 63 - 74 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] émulsion photographique
[Termes IGN] photographie aérienne
[Termes IGN] photographie en couleur
[Termes IGN] photographie infrarouge
[Termes IGN] réflectance spectrale
[Termes IGN] réflectance végétale
[Termes IGN] réponse spectrale
[Termes IGN] végétationRésumé : (Auteur) Conventional color (CC) and colorinfrared (CIR) photography have been used in a widerange of remote sensing applications. Many users, however, do not fully understand or know how to interpret it. Published plant photography / reflectance studies make little effort to help the layreader understand the relationship of plant spectral reflectance with their color tonal response on color photographic film. The objective of this paper is to describe the relationship of how spectral reflectances of plant species are registered on photographic film and how the resultant color tonal responses of the plants are produced in relation to their spectral reflectance. Illustrations are presented which simplify the interpretation of the interaction between plant canopy reflectance and CC/CIR photographic film emulsion layers, including the resultant color tones of the plants. Research studies addressing both plant photography and reflectance data can be more meaningful and better appreciated if one has a general understanding of these relationships. Numéro de notice : A2002-227 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040208542237 En ligne : https://doi.org/10.1080/10106040208542237 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22141
in Geocarto international > vol 17 n° 2 (June - August 2002) . - pp 63 - 74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-02021 RAB Revue Centre de documentation En réserve L003 Disponible Object detection using transformed signatures in multitemporal hyperspectral imagery / R. Mayer in IEEE Transactions on geoscience and remote sensing, vol 40 n° 4 (April 2002)
[article]
Titre : Object detection using transformed signatures in multitemporal hyperspectral imagery Type de document : Article/Communication Auteurs : R. Mayer, Auteur ; R. Priest, Auteur Année de publication : 2002 Article en page(s) : pp 831 - 840 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] image hyperspectrale
[Termes IGN] image multitemporelle
[Termes IGN] recouvrement d'images
[Termes IGN] signature spectrale
[Termes IGN] superposition d'imagesRésumé : (Auteur) Changes in atmosphere, ground conditions, and sensor response between multitemporal airborne imaging sessions have limited the use of fixed target hyperspectral libraries in helping to identify targets in heterogeneous (cluttered) backgrounds. This hyperspectral target signature instability has resulted in using anomaly detection algorithms to detect targets in real time applications. The anomaly detection algorithms, however, have not detected targets at sufficiently low false alarm rates. This study examines mathematical transforms of target spectral signatures. Specifically this study uses statistical information regarding background clutter taken from one long-wave infrared (LWIR) hyperspectral (8-12jum) airborne imagery flown on one day, to find the target spectral signature flown on another day (with significantly dissimilar weather conditions). The transforms use overlapping regions in the two data sets but without subpixel level registration. This work analyzes image cubes collected during the November 1998 Hyperspectral Day/Night Radiometry Assessment (HYDRA) data collect. The transformed signatures used in matched filter searches successfully find targets (even targets nearly covered) with low false alarm rates ( Numéro de notice : A2002-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.1006361 En ligne : https://doi.org/10.1109/TGRS.2002.1006361 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22093
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 4 (April 2002) . - pp 831 - 840[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-02041 RAB Revue Centre de documentation En réserve L003 Disponible 065-02042 RAB Revue Centre de documentation En réserve L003 Disponible Geostatistical modelling of spatial uncertainty using P-field simulation with conditional probability fields / P. Goovaerts in International journal of geographical information science IJGIS, vol 16 n° 2 (march 2002)
[article]
Titre : Geostatistical modelling of spatial uncertainty using P-field simulation with conditional probability fields Type de document : Article/Communication Auteurs : P. Goovaerts, Auteur Année de publication : 2002 Article en page(s) : pp 167 - 178 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] géostatistique
[Termes IGN] histogramme
[Termes IGN] image SPOT
[Termes IGN] incertitude géométrique
[Termes IGN] modèle d'erreur
[Termes IGN] modèle d'incertitude
[Termes IGN] réflectance végétale
[Termes IGN] seuillage d'image
[Termes IGN] simulationRésumé : (Auteur) This paper presents a variant of p-field simulation that allows generation of spatial realizations through sampling of a set of conditional probability distribution functions (ccdf) by sets of probability values, called p-fields. Whereas in the common implementation of the algorithm the p-fields are non conditional realizations of random functions with uniform marginal distributions, they are here conditional to 0.5 probability values at data locations, which entails a preferential sampling of the central part of the ecdf around these locations. The approach is illustrated using a randomly sampled (200 observations of the NIR channel) SPOT scene of a semi-deciduous tropical forest. Results indicate that the use of conditional probability fields improves the reproduction of statistics such as histogram and semi-variogram, while yielding more accurate predictions of reflectance values than the common p-field implementation or the more CPU-intensive sequential indicator simulation. Pixel values are then classified as forest or savannah depending on whether the simulated reflectance value exceeds a given threshold value. In this case study, the proposed approach leads to a more precise and accurate prediction of the size of contiguous areas covered by savannah than the two other simulation algorithms. Numéro de notice : A2002-026 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810110099125 En ligne : https://doi.org/10.1080/13658810110099125 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21943
in International journal of geographical information science IJGIS > vol 16 n° 2 (march 2002) . - pp 167 - 178[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-02021 RAB Revue Centre de documentation En réserve L003 Disponible Geodynamics / D. Turcotte (2002)PermalinkObserving our environment from space / G. Begni (2002)PermalinkOn the estimation of radar polarization orientation shifts induced by terrain slopes / Jong-Sen Lee in IEEE Transactions on geoscience and remote sensing, vol 40 n° 1 (January 2002)PermalinkMonitoring and water pollution modelling of the Bosphorus by regression analysis using multitemporal Landsat-TM data / H. Gonca Coskun (2001)PermalinkA numerical analysis of the accuracy of laboratory and field goniometer measurements / N. Widen (2001)PermalinkTraitement des images de RSO [Radar à Synthèse d'0uverture] / Henri Maître (2001)PermalinkVers une étude purement numérique de la montagne de type alpin / Gérard Galibert (01/01/2001)PermalinkAnalyse du potentiel des images radar pour la cartographie et la mise à jour de cartes en Guinée-Conakry / Cédric Parent (2000)PermalinkDéconvolution des signatures spectrales de séries d'images satellitales / Sonia Zine (2000)PermalinkIntroductory remote sensing / P.J. Gibson (2000)Permalink