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Matched filtering-based estimation of ground elevation using laser altimetry / J.M. Anderson in IEEE Transactions on geoscience and remote sensing, vol 39 n° 10 (October 2001)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 39 n° 10 (October 2001) . - pp 2168 - 2175 Titre : Matched filtering-based estimation of ground elevation using laser altimetry Type de document : Article/Communication Auteurs : J.M. Anderson, Auteur ; A.S. Al Qatshan, Auteur Année de publication : 2001 Article en page(s) : pp 2168 - 2175 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] bruit blanc [Termes IGN] télémétrie laser aéroporté [Termes IGN] théorème de Gauss [Termes IGN] traitement du signal Résumé : (Auteur) In this paper, we present a method for determining the time-of-arrival (TOA) of the ground component of a laser altimetry return signal. The proposed method takes advantage of the fact that the ground component or ground return is approximately Gaussian shaped and occurs at the end of the return signal. In particular, the method exploits the well-known result that the TOA of a known signal in white Gaussian noise can be estimated using matched filtering. An important feature of the method is that it addresses the problem of overlap between ground and vegetation returns. Simulations using synthetic data indicate that the proposed method provides excellent estimates and greatly outperforms a conventional method. It is anticipated that the method will be applicable to laser altimetry applications where the ground return can be assumed to have an approximately known shape. Numéro de notice : A2001-093 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.957279 En ligne : https://doi.org/10.1109/36.957279 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21793 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Terrain mapping by ground-based interferometric radar / M. Pieraccini in IEEE Transactions on geoscience and remote sensing, vol 39 n° 10 (October 2001)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 39 n° 10 (October 2001) . - pp 2176 - 2181 Titre : Terrain mapping by ground-based interferometric radar Type de document : Article/Communication Auteurs : M. Pieraccini, Auteur ; Guido Luzi, Auteur ; C. Atzeni, Auteur Année de publication : 2001 Article en page(s) : pp 2176 - 2181 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] image radar [Termes IGN] image radar moirée [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] modèle numérique de surface Résumé : (Auteur) In this paper, the authors propose a ground-based interferometric synthetic aperture radar (SAR) technique for terrain mapping. It is based on a coherent continuous-wave step-frequency (CW-SF) radar moved along a linear horizontal rail. It works synthesising microwave holographic images taken from different points of view to obtain elevation maps by phase comparison. The focusing algorithm for imaging synthetic holograms and digital elevation models (DEM) is able to correct topographic distortion and phase wrap through an iterative multi-baseline procedure. Numéro de notice : A2001-094 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.957280 En ligne : https://doi.org/10.1109/36.957280 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21794 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Detection of urban structures in SAR images by robust fuzzy clustering algorithms: the example of street tracking / F. Dell'acqua in IEEE Transactions on geoscience and remote sensing, vol 39 n° 10 (October 2001)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 39 n° 10 (October 2001) . - pp 2287 - 2297 Titre : Detection of urban structures in SAR images by robust fuzzy clustering algorithms: the example of street tracking Type de document : Article/Communication Auteurs : F. Dell'acqua, Auteur ; Paolo Gamba, Auteur Année de publication : 2001 Article en page(s) : pp 2287 - 2297 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] analyse de groupement [Termes IGN] chemin le plus court, algorithme du [Termes IGN] classification floue [Termes IGN] extraction automatique [Termes IGN] image aérienne [Termes IGN] image radar moirée [Termes IGN] logique floue [Termes IGN] milieu urbain [Termes IGN] réseau routier [Termes IGN] route [Termes IGN] transformation de Hough Résumé : (Auteur) In this work, we present a fuzzy approach to the analysis of airborne synthetic aperture radar (SAR) images of urban environments. In particular, we want to show how to implement structure extraction algorithms based on fuzzy clustering unsupervised approaches. To this aim, the idea is to segment first the sensed data and recognize very basic urban classes (vegetation, roads, and built areas). Then, from these classes, we extract structures and infrastructures of interest. The initial clustering step is obtained by means of fuzzy logic concepts and the successive analyses are able to exploit the corresponding fuzzy partition. As a possible complete procedure for urban SAR images, in this paper, we focus on the street tracking and extraction problem. Three road extraction algorithms available in literature (namely, the connectivity weighted Hough transform (CWHT), the rotation Hough transform, and the shortest path extraction) have been modified to be consistent with the previously computed fuzzy clustering results. Their different capabilities are applied for the characterization of streets with different width and shape. The whole approach is validated by the analysis of AIRSAR images of Los Angeles, CA. Numéro de notice : A2001-095 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.957292 En ligne : https://doi.org/10.1109/36.957292 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21795 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A system for the automatic selection of conspicuous color sets for qualitative data display / P. Campadelli in IEEE Transactions on geoscience and remote sensing, vol 39 n° 10 (October 2001)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 39 n° 10 (October 2001) . - pp 2283 - 2286 Titre : A system for the automatic selection of conspicuous color sets for qualitative data display Type de document : Article/Communication Auteurs : P. Campadelli, Auteur ; R. Schettini, Auteur ; S. Zuffi, Auteur Année de publication : 2001 Article en page(s) : pp 2283 - 2286 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] classification [Termes IGN] codage [Termes IGN] couleur à l'écran [Termes IGN] visualisation Résumé : (Auteur) We describe the main features of a system supporting the selection of color palettes for qualitative data representation, such as in supervised or unsupervised image classification. Based on visual interaction, the system provides effective tools for browsing the Munsell color space and setting perceptual constraints on the colors, which it then selects automatically. The system is now available for academic and nonprofit purposes. Numéro de notice : A2001-096 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.957291 En ligne : https://doi.org/10.1109/36.957291 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21796 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Evaluation of JPEG-LS, the new lossless and controlled-lossy still image compression standard, for compression of high-resolution elevation data / S.D. Raney in IEEE Transactions on geoscience and remote sensing, vol 39 n° 10 (October 2001)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 39 n° 10 (October 2001) . - pp 2298 - 2306 Titre : Evaluation of JPEG-LS, the new lossless and controlled-lossy still image compression standard, for compression of high-resolution elevation data Type de document : Article/Communication Auteurs : S.D. Raney, Auteur ; G. Sapiro, Auteur Année de publication : 2001 Article en page(s) : pp 2298 - 2306 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] compression d'image [Termes IGN] données altimétriques [Termes IGN] modèle numérique de surface Résumé : (Auteur) The compression of elevation data is studied in this paper. The performance of JPEG-LS, the new international ISO/ITU standard for lossless and near-lossless (controlled-lossy) still-image compression, is investigated both for data from the USGS digital elevation model (DEM) database and the navy-provided digital terrain model (DTM) data. Using JPEG-LS has the advantage of working with a standard algorithm. Moreover, in contrast with algorithms like the popular JPEG-lossy standard, this algorithm permits the completely lossless compression of the data as well as a controlled lossy mode where a sharp upper bound on the elevation error is selected by the user. All these are achieved at a very low computational complexity. In addition to these algorithmic advantages, we show that JPEG-LS achieves significantly better compression results than those obtained with other (non-standard) algorithms previously investigated for the compression of elevation data. The results here reported suggest that JPEG-LS can immediately be adopted for the compression of elevation data for a number of applications. Numéro de notice : A2001-097 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.957293 En ligne : https://doi.org/10.1109/36.957293 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21797 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible