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Auteur A. Karnieli |
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Use of derivative calculations and minimum noise fraction transform for detecting and correcting the spectral curvature effect (Smile) in Hyperion Images / A. Dadon in IEEE Transactions on geoscience and remote sensing, vol 48 n° 6 (June 2010)
[article]
Titre : Use of derivative calculations and minimum noise fraction transform for detecting and correcting the spectral curvature effect (Smile) in Hyperion Images Type de document : Article/Communication Auteurs : A. Dadon, Auteur ; Eyal Ben-Dor, Auteur ; A. Karnieli, Auteur Année de publication : 2010 Article en page(s) : pp 2603 - 2612 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] filtrage du bruit
[Termes IGN] image EO1-Hyperion
[Termes IGN] image hyperspectraleRésumé : (Auteur) Earth Observing-1 Hyperion data were found to be relatively noisy and to contain significant cross-track spectral curvature nonlinearity disturbances, known as the smile/frown effect. A method for the correction of spectral curvature effects (smile) in Hyperion images, termed trend line smile correction (TLSC), is presented. The method is based on the assumption that there is a partial correlation between data spectral nonuniformity, due to the smile and eigenvalues gradient that mostly appears in the first minimum noise fraction (MNF) image (MNF-1). However, MNF-1 consists of both spatial and spectral information. Therefore, it is hypothesized that adaptation applied to MNF-1, according to exclusively spectrally derived parameters (e.g., atmospheric absorption features) can account specifically for the smile effect in the data. A set of normalization factors, calculated from the spectral derivative at the right-hand side of the O2 absorption feature (760 nm), MNF-1 and the moderate-resolution atmospheric transmittance radiative transfer model, are used to scale the initial MNF-1. The image is corrected after the inverse conversion of the MNF to radiance space. The methodology was tested on four different Hyperion scenes and consistently outperformed other tested methods by up to nine times. As a result, thematic mapping, using the TLSC-corrected reflectance data cube, was shown to be consistent with the geology maps of the study area. Numéro de notice : A2010-194 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2010.2040391 En ligne : https://doi.org/10.1109/TGRS.2010.2040391 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30388
in IEEE Transactions on geoscience and remote sensing > vol 48 n° 6 (June 2010) . - pp 2603 - 2612[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2010061 RAB Revue Centre de documentation En réserve L003 Disponible 065-2010062 RAB Revue Centre de documentation En réserve L003 Disponible Topographic information of sand dunes as extracted from shading effects using Landsat images / N. Levin in Remote sensing of environment, vol 90 n° 2 (30/03/2004)
[article]
Titre : Topographic information of sand dunes as extracted from shading effects using Landsat images Type de document : Article/Communication Auteurs : N. Levin, Auteur ; Eyal Ben-Dor, Auteur ; A. Karnieli, Auteur Année de publication : 2004 Article en page(s) : pp 190 - 209 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] analyse comparative
[Termes IGN] angle azimutal
[Termes IGN] appariement d'histogramme
[Termes IGN] dénivelée
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] dune
[Termes IGN] extraction du relief
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Landsat-TM
[Termes IGN] image multitemporelle
[Termes IGN] image Terra-ASTER
[Termes IGN] Israël
[Termes IGN] ombre
[Termes IGN] pente
[Termes IGN] réflectanceRésumé : (Auteur) Topographic variations affect the reflectance properties of the Earth's surface and are often removed in remote sensing studies. especially when significant terrain variations exist. In this study, however, we show that shading effects assessed by Landsat can be treated as a signal that stores important topographic information, especially when the spectral characteristics of a surface are homogenous. The coastal transverse dunes of the Ashdod area, and the desert linear dunes of Nizzana (both located in Israel), were selected to investigate the above-mentioned idea. The dune heights in these areas are 10 m on average (relative to their surroundings) and have maximum slopes of 33°. An innovative method for extracting slope, aspect, and height data for sand dunes using Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM+) images was developed, based on the regularity and periodicity of dunes landscapes. Using two Landsat images representing different sun zenith and azimuth angles, reflectance values of each image were converted to cos(i) values (i =incident angle between the surface normal and the solar beam radiation), applying histogram matching methods. The slope and aspect of each pixel were determined as those that give the best prediction of the observed value of cos(i). Height profiles were then extracted, using simple trigonometric relationships. The accuracies of heights and slopes along selected profile lines were to the order of 1 m and 3°, respectively (at a spatial resolution of 15 m). Best results were obtained when the images included one from the summer and the other from the winter, corresponding to maximum difference in solar zenith and azimuth angles. Errors in heights were attributed to surface heterogeneity (e.g., presence of biogenic soil crusts in the rainy season), geometric correction errors, cast shadows, and Bidirectional Reflectance Distribution Function (BRDF) effects. Comparison to Advanced Thermal Emission and Reflection Radiometer (ASTER) 3D information showed that the proposed method is better in representing the topographic variation of the area than the digital elevation model (DEM) produced by ASTER. Numéro de notice : A2004-141 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.12.008 En ligne : https://doi.org/10.1016/j.rse.2003.12.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26668
in Remote sensing of environment > vol 90 n° 2 (30/03/2004) . - pp 190 - 209[article]vol 23 n° 19 - October 2002 - Remote sensing studies of the middle east dryland, [actes], Sede Bocker Campus, 23 - 27 October 2000 (Bulletin de International Journal of Remote Sensing IJRS) / Remote sensing and photogrammetry society
[n° ou bulletin]
est un bulletin de International Journal of Remote Sensing IJRS / Remote sensing and photogrammetry society (1980 -)
Titre : vol 23 n° 19 - October 2002 - Remote sensing studies of the middle east dryland, [actes], Sede Bocker Campus, 23 - 27 October 2000 Type de document : Périodique Auteurs : Remote sensing and photogrammetry society, Auteur ; A. Karnieli, Éditeur scientifique Année de publication : 2002 Conférence : RSPS 2000, Remote sensing studies of the middle east dryland 23/10/2000 27/10/2000 Beer-Sheva Israël Importance : 404 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection Numéro de notice : 080-0219 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=3107 [n° ou bulletin]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-02191 RAB Revue Centre de documentation En réserve L003 Disponible