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Statistical and operational performance assessment of multitemporal SAR image filtering / Emmanuel Trouvé in IEEE Transactions on geoscience and remote sensing, vol 41 n° 11 (November 2003)
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Titre : Statistical and operational performance assessment of multitemporal SAR image filtering Type de document : Article/Communication Auteurs : Emmanuel Trouvé, Auteur ; Y. Chambenoit, Auteur ; N. Classeau, Auteur ; Philippe Bolon, Auteur Année de publication : 2003 Article en page(s) : pp 2519 - 2530 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse comparative
[Termes IGN] filtrage du bruit
[Termes IGN] filtre de déchatoiement
[Termes IGN] image ERS-SAR
[Termes IGN] image multitemporelle
[Termes IGN] test de performanceRésumé : (Auteur) Multitemporal synthetic aperture radar (SAR) image filtering is a useful pre-processing step for many applications that require speckle reduction. Several multitemporal filters are now available with very different characteristics. In this paper, the performance of three multitemporal filters is assessed with respect to statistical and operational criteria. Statistical criteria include measures of bias, noise reduction, and preservation of both spatial and temporal information. Operational criteria evaluate the accuracy of manual detection of geographical features such as points, lines and surfaces. This study was carried out with the help of ten photo-interpreters. It uses a set of seven multitemporal SAR images from the European Remote Sensing 1 (ERS-1) satellite. It provide guidelines to select multitemporal filters according to the application and the subsequent processing. Numéro de notice : A2003-320 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.817270 En ligne : https://doi.org/10.1109/TGRS.2003.817270 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22616
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 11 (November 2003) . - pp 2519 - 2530[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-03111 RAB Revue Centre de documentation En réserve L003 Disponible Speckle filtering and coherence estimation of polarimetric SAR interferometry data for forest applications / Jong-Sen Lee in IEEE Transactions on geoscience and remote sensing, vol 41 n° 10 (October 2003)
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Titre : Speckle filtering and coherence estimation of polarimetric SAR interferometry data for forest applications Type de document : Article/Communication Auteurs : Jong-Sen Lee, Auteur ; S.R. Cloude, Auteur ; K.P. Papathanassiou, Auteur ; M.R. Grunes, Auteur ; I.H. Woodhouse, Auteur Année de publication : 2003 Article en page(s) : pp 2254 - 2263 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bande L
[Termes IGN] estimation de cohérence
[Termes IGN] filtre de déchatoiement
[Termes IGN] image radar moirée
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] matrice
[Termes IGN] Pol-INSARNuméro de notice : A2003-353 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.817196 En ligne : https://doi.org/10.1109/TGRS.2003.817196 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26433
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 10 (October 2003) . - pp 2254 - 2263[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-03101 RAB Revue Centre de documentation En réserve L003 Disponible Road vectors update using SAR imagery: a snake-based method / L. Bentabet in IEEE Transactions on geoscience and remote sensing, vol 41 n° 8 (August 2003)
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Titre : Road vectors update using SAR imagery: a snake-based method Type de document : Article/Communication Auteurs : L. Bentabet, Auteur ; S. Jodouin, Auteur ; D. Ziou, Auteur ; J. Vaillancourt, Auteur Année de publication : 2003 Article en page(s) : pp 1785 - 1803 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] chatoiement
[Termes IGN] contour
[Termes IGN] extraction du réseau routier
[Termes IGN] filtre de déchatoiement
[Termes IGN] mise à jour de base de données
[Termes IGN] virageRésumé : (Auteur) The paper presents an approach for roads detection based on synthetic aperture radar (SAR) images and road database The vectors provided by the database are refined using active contours (snakes). In this framework, we firstly develop a restoration filter based on the frost filter achieving an acceptable compromise between speckle elimination and lines preserving. This is followed by a line plausibility calculation step which is used to deform the snake from its initial location toward the final solution. The snake is reformulated using finite elements method. The setting of the snake parameters is not an obvious problem especially when they are tuned by trialanderror process. We propose a new automatic computational rule for the snake parameters. Our approach is validated by a series of tests on synthetic and SAR images. Numéro de notice : A2003-278 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.813850 En ligne : https://doi.org/10.1109/TGRS.2003.813850 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22573
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 8 (August 2003) . - pp 1785 - 1803[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-03081 RAB Revue Centre de documentation En réserve L003 Disponible Fusion radar and optical data for land cover mapping / Nathaniel D. Herold in Geocarto international, vol 17 n° 2 (June - August 2002)
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Titre : Fusion radar and optical data for land cover mapping Type de document : Article/Communication Auteurs : Nathaniel D. Herold, Auteur ; Barry N. Haack, Auteur Année de publication : 2002 Article en page(s) : pp 19 - 27 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image mixte
[Termes IGN] analyse texturale
[Termes IGN] carte d'occupation du sol
[Termes IGN] chatoiement
[Termes IGN] classification dirigée
[Termes IGN] filtre de déchatoiement
[Termes IGN] image Landsat-TM
[Termes IGN] image multicapteur
[Termes IGN] image optique
[Termes IGN] image radar
[Termes IGN] précision relative
[Termes IGN] réalité de terrainRésumé : (Auteur) This study examined the complementarity of radar and optical data for feature identification. Spaceborne radar and Landsat Thematic Mapper (TM ) multispectral data sets were assessed independently and in combination to classify a site near Wad Medani, Sudan. Radar processing procedures included speckle reduction, texture extraction and postprocessing smoothing. Relative accuracy of the resultant classifications was established by comparison to ground truth information derived from field visitation. Neither speckle filtering nor postclassification smoothing were improvements over the poor results obtained with the unfiltered, original radar data. Texture measures were significant improvements over the original data (20 percent overall accuracy increase) and several, but not all, individual classes had excellent results. Landsat TM had good overall results (80 percent correct) but considerable spectral confusion between urban and bare soil. Combination of radar with Landsat TM greatly improved results, achieving near perfect classification of all individual classes. The systematic strategy of this study, determination of the best individual method before introducing the next procedure, itas effective in managing a complex set of analysis possibilities. Numéro de notice : A2002-225 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040208542232 En ligne : https://doi.org/10.1080/10106040208542232 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22139
in Geocarto international > vol 17 n° 2 (June - August 2002) . - pp 19 - 27[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 059-02021 RAB Revue Centre de documentation En réserve L003 Disponible Analysis of refraction influences in geodesy using image processing and turbulence models / Philipp Flach (2001)
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Titre : Analysis of refraction influences in geodesy using image processing and turbulence models Type de document : Thèse/HDR Auteurs : Philipp Flach, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2001 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 63 Importance : 175 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-05-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie
[Termes IGN] analyse spectrale
[Termes IGN] détecteur à transfert de charge
[Termes IGN] filtre de Wiener
[Termes IGN] instrument de géodésie
[Termes IGN] instrumentation Leica
[Termes IGN] méthode des moindres carrés
[Termes IGN] modèle atmosphérique
[Termes IGN] réfraction atmosphérique
[Termes IGN] spectre électromagnétique
[Termes IGN] traitement d'image
[Termes IGN] turbulence
[Termes IGN] variance
[Termes IGN] vidéothéodoliteIndex. décimale : 30.03 Instruments de géodésie Résumé : (Auteur) The propagation path of light in the atmosphere is influenced by inhomogeneities of the refractive index. These refraction effects deteriorate the accuracy of the direction and distance measurements in geodetic applications. As illustrated by two examples in this report, the refraction effects cannot be accurately corrected up to now and, therefore, solutions must be provided which can be implemented into geodetic instruments. The presented approach is based on the determination of the temperature gradient being the decisive influential parameter for angular refraction effects.
In the atmosphere, temperature gradients are related to turbulent thermal exchange processes such as the turbulent sensible heat flux. In order to describe atmospheric turbulence, the applied statistical approach uses the method of spectral analysis which states that the atmospheric turbulent velocity field can be thought to consist of many eddies of different densities. This energy spectrum of turbulence can be modelled using the structure constant of refractive index CJ and the inner scale 10 of turbulence. If these two structure parameters are measured, the temperature gradient is derived from dimensionless profile functions using the so-called Monin-Obukhov similarity description. Hereby, the fact should be kept in mind, that the Monin-Obukhov similarity description and the energy spectrum of turbulence are only valid for vertical temperature gradient profiles in the atmospheric boundary layer.
This research work investigates the determination of the required structure parameter Cn and lo by means of image sensors which can be built into geodetic instruments. To derive the structure parameters CJ and 10 from the acquired image data, the application of appropriate image processing techniques is examined. The evaluation concept is based on angle-of-arrival fluctuations and intensity fluctuations. Angle-of-arrival fluctuations are perceived as high-frequency motions of image patterns grabbed by the sensor, and intensity fluctuations are related to the temporal variation of the gray values of the pixels. As presented in this report, these two effects of optical turbulence can be used to determine the structure parameter Cn and lo. For this purpose, image processing techniques must parameterize both angle-of-arrival fluctuations and intensity fluctuations. Within this research work, the angle-of-arrival fluctuations are modelled by the variance óx characterizing the shifting of image patterns which are located using edge detection algorithms. The intensity fluctuations are modelled by the variance óx characterizing the temporal intensity spectrum of the incoming light beam. In the scope of this research work, the variance óx is provided using digital filter techniques such as the Wiener filter or least-squares template matching.
In order to validate this concept, the video theodolite Leica TM3000V and a digital line scan camera Basler L120 are used as two different imaging systems to acquire image data during various practical field experiments. These field experiments revealed a partial good agreement between the structure parameter CJ and lo obtained by the image sensors and the ones obtained by a reference system (scintillometer). Basically, the method presented here is appropriate to reduce the refraction influence. A decisive advantage of this method is based on the fact that additional sensors are not necessary (except for the image sensors which are built into the instrument). However, as the exemplary comparison of temperature gradients shows at the end of the report, further research work in the scope of the atmospheric boundary layer is still necessary.Numéro de notice : 13062 Affiliation des auteurs : non IGN Autre URL associée : http://dx.doi.org/10.3929/ethz-a-004045114 Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-004045114 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-63.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54863 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 13062-01 30.03 Livre Centre de documentation En réserve M-103 Disponible 13062-02 30.03 Livre Centre de documentation En réserve M-103 Disponible Evaluation of "Mitch" hurricane damages in central America using satellite imagery / P. Romeijn (2001)
PermalinkPermalinkFiltrage du speckle dans les images radar à synthèse d'ouverture polarimétriques et classification supervisée multi-source / Franck Sery (1997)
PermalinkContribution de données multi-temporelles à l'amélioration radiométrique et à l'utilisation d'images de radars à synthèse d'ouverture / J. Bruniquel (1996)
PermalinkPermalinkApplications de la transformée en ondelettes et de l'analyse multirésolution au traitement des images de télédétection / Thierry Ranchin (1993)
PermalinkPermalinkTwo adaptive filters for speckle reduction in SAR images by using the variance ratio / L. Changle in International Journal of Remote Sensing IJRS, vol 9 n° 4 (April 1988)
PermalinkFiltering of digitally correlated gestalt elevation data / A.L. Kok in Photogrammetric Engineering & Remote Sensing, PERS, vol 53 n° 5 (may 1987)
PermalinkQuality assessment of object location and point transfer using digital image correlation techniques / Wolfgang Förstner (1984)
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