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Ouvrages de la bibliothèque en indexation 35.22 (46)
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Titre : Coherent radar performance estimation Type de document : Monographie Auteurs : J.L. Kurtz, Auteur ; J.A. Scheer, Auteur Editeur : Londres, Washington : Artech House Année de publication : 1993 Importance : 450 p. Format : 16 x 23 cm ISBN/ISSN/EAN : 978-0-89006-628-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] bruit (théorie du signal)
[Termes IGN] effet Doppler
[Termes IGN] erreur de mesure
[Termes IGN] estimation de cohérence
[Termes IGN] image radar moirée
[Termes IGN] interférence
[Termes IGN] modèle mathématique
[Termes IGN] radar
[Termes IGN] radar imageur
[Termes IGN] télédétection en hyperfréquence
[Termes IGN] traitement du signal
[Termes IGN] transformation de FourierIndex. décimale : 35.22 Télédétection en hyperfréquence - Traitement d'image radar Numéro de notice : 30175 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Recueil / ouvrage collectif Accessibilité hors numérique : Non accessible via le SUDOC Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=42187
Titre : Postprocessing von SAR-Satellitenbilddaten Type de document : Monographie Auteurs : Francesco Holecz, Auteur Editeur : Zurich : Remote Sensing Laboratory Année de publication : 1993 Collection : Remote sensing series num. 23 Importance : 150 p. Format : 15 x 22 cm Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] correction d'image
[Termes IGN] distorsion d'image
[Termes IGN] filtrage du rayonnement
[Termes IGN] image radar moirée
[Termes IGN] image SeaSat
[Termes IGN] relief
[Termes IGN] télédétection spatialeIndex. décimale : 35.22 Télédétection en hyperfréquence - Traitement d'image radar Résumé : (Auteur) The launch of the Seasat satellite in 1978 marked the beginning of the era of spaceborne Synthetic Aperture Radar (SAR) remote sensing. SAR systems are active imaging systems, able to illuminate and record the Earth's surface using their own energy source. They achieve a spatial resolution comparable to optical systems. This work uses the example of a Seasat SAR scene in the Jura region of the Swiss Canton of Vaud to show the capabilities of, and limitations on, the recognition and extraction of information over land. For the first time a complete postprocessing of spaceborne SAR images has been applied to a relatively large area (around 840 km2) of rough terrain possessing considerable thematic variation. A five step procedure is proposed for the postprocessing of SAR images. These are filtering, geometric recti-fication, correction of relief-induced distortions, texture analysis, and classification. Three principal distortions that influence the image interpretation are corrected. They are image noise, geometric distortions and relief-indu-ced radiometric influences.
The image noise, caused by the coherent nature of the sensor, makes detection of objects very difficult. Thus an adaptive filtering that is based on a multiplicative image model has been applied (Frost et al,, 1984). The geometric distortions, clearly visible in areas with rough terrain, cause a non linear compression of the surface in the range direction. Because geometric rectification of SAR images cannot be accomplished in the SAR processing step, geometric distortions must be corrected subsequently by taking into account the imaging geome-try together with the parameters used during the SAR processing. The range-Doppler approach, developed by Meier (Meier et al., 1989) is used. The significant differences in intensity that are caused by the SAR sensor's imaging geometry depend on the slope and exposition of the relief relative to the sensor position. Sloped areas faced toward the sensor appear brig-hter while sloped areas faced away from the sensor look darker. This leads to anisotropic signatures. The goal of the relief-induced radiometric correction is the production of isotropic signatures. Six different approaches, based on heuristic and theoretical methods, are used to demonstrate that the tonal information (e.g. the local mean backscattering), for spaceborne SAR systems, constitutes without question almost all of the useful information. Textural features from the methods that are studied show some separability, but are strongly correlated with the tonal information. The reason for the separability is that the textural features are based on the estimation of the mean value. The lack of textural information is mainly due to the poor spatial resolution of the Seasat system.
Because the textural information does not improve on results obtainable using only the tonal information, a forest classification can be carried out using only contextual information, based exclusively on the tonal informa-tion.
The results of this work show clearly that, in spite of coherent image noise and strong relief-induced distor-tions, the Seasat SAR system (L band, HH polarization) can be used for forest discrimination if a suitable postpro-cessing is carried out. However, such a postprocessing requires several work-intensive steps. Because the local mean backscattering constitutes most of the useful information, both the capabilities and the success of the digital image interpretation are dependent on the system's frequency, polarization, and spatial resolution.Numéro de notice : 15691 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62763 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15691-01 35.22 Livre Centre de documentation Télédétection Disponible
Titre : Radar imagery: theory and interpretation : Lecture notes Type de document : Monographie Auteurs : Jean-François Dallemand, Auteur ; J. Lichtenegger, Auteur ; R.K. Raney, Auteur ; R. Schumann, Auteur Editeur : Rome [Italie] : Food and Agriculture Organization / Organisation des Nations Unies pour l'Alimentation et l'Agriculture FAO Année de publication : 1993 Collection : RSC Series num. 67 Importance : 103 p. Format : 21 x 30 cm Note générale : Bibliographie, glossaire Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] chatoiement
[Termes IGN] coefficient de rétrodiffusion
[Termes IGN] filtre de déchatoiement
[Termes IGN] hyperfréquence
[Termes IGN] micro-onde
[Termes IGN] modèle géométrique de prise de vue
[Termes IGN] radar à antenne synthétique
[Termes IGN] télédétection en hyperfréquenceIndex. décimale : 35.22 Télédétection en hyperfréquence - Traitement d'image radar Note de contenu : 1 - Radar waves and backscattering coefficient
2 - Basic principle of imaging radars
3 - Element of radar imagery interpretation
4 - Applications
5 - ConclusionNuméro de notice : 21508 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90348 Documents numériques
en open access
Radar imagery: theory and interpretation - pdfAdobe Acrobat PDF
Titre : SAR geocoding : data and systems Type de document : Monographie Auteurs : Gunter Schreier, Éditeur scientifique Editeur : Karlsruhe, Heidelberg, ... : Wichmann Année de publication : 1993 Importance : 434 p. Format : 15 x 21 cm ISBN/ISSN/EAN : 978-3-87907-247-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] accentuation d'image
[Termes IGN] analyse texturale
[Termes IGN] correction géométrique
[Termes IGN] ERS
[Termes IGN] extraction automatique
[Termes IGN] géométrie de l'image
[Termes IGN] image ERS-SAR
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] points homologues
[Termes IGN] qualité d'image
[Termes IGN] secteur terrienIndex. décimale : 35.22 Télédétection en hyperfréquence - Traitement d'image radar Résumé : (Editeur) This book gives an overview of the principles of SAR processing geometric effects of SAR and parametric geocoding of SAR, both ellipsoid and terrain corrected. The new geocoded data sets and the systems and ancillary information to generate these data are described in detail. Basic applications and analysis procedures with the data are described in order to help to understand the content of the geocoded SAR images. Several authors from the German Processing and Archiving Facility (D-PAF) of DLR in Oberpfaffenhofen and other research groups, who actively contributed to algorithms and :system aspects of SAR geocoding, contributed chapters of this reference book. An overview of current on-going activities in Europe in this domain concludes the chapters. This volume is intended to introduce new SAR data users as well as those starting with SAR data and Geographic Information Systems (GIS) to the principles of SAR data geocoding and to give experts a detailed overview of used references and algorithms. Numéro de notice : 44253 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=42708
Titre : Synthetic aperture radar and electronic warfare Type de document : Monographie Auteurs : W.W. Goj, Auteur Editeur : Londres, Washington : Artech House Année de publication : 1993 Importance : 83 p. Format : 16 x 23 cm ISBN/ISSN/EAN : 978-0-89006-566-2 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] brouillage
[Termes IGN] radar à antenne synthétique
[Termes IGN] utilisateur militaireIndex. décimale : 35.22 Télédétection en hyperfréquence - Traitement d'image radar Numéro de notice : 44209 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=58171 PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkPermalinkPermalinkPermalinkPermalink