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FFT-enhanced IHS transform method for fusing high-resolution satellite images / Y. Ling in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 6 (February 2007)
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Titre : FFT-enhanced IHS transform method for fusing high-resolution satellite images Type de document : Article/Communication Auteurs : Y. Ling, Auteur ; Manfred Ehlers, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 381 - 392 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse en composantes principales
[Termes IGN] distorsion d'image
[Termes IGN] fusion d'images
[Termes IGN] image à résolution métrique
[Termes IGN] image à résolution submétrique
[Termes IGN] image à très haute résolution
[Termes IGN] image Ikonos
[Termes IGN] image multibande
[Termes IGN] image panchromatique
[Termes IGN] image Quickbird
[Termes IGN] transformation intensité-teinte-saturation
[Termes IGN] transformation rapide de Fourier
[Termes IGN] valeur radiométriqueRésumé : (Auteur) Existing image fusion techniques such as the intensity–hue–saturation (IHS) transform and principal components analysis (PCA) methods may not be optimal for fusing the new generation commercial high-resolution satellite images such as Ikonos and QuickBird. One problem is color distortion in the fused image, which causes visual changes as well as spectral differences between the original and fused images. In this paper, a fast Fourier transform (FFT)-enhanced IHS method is developed for fusing new generation high-resolution satellite images. This method combines a standard IHS transform with FFT filtering of both the panchromatic image and the intensity component of the original multispectral image. Ikonos and QuickBird data are used to assess the FFT-enhanced IHS transform method. Experimental results indicate that the FFT-enhanced IHS transform method may improve upon the standard IHS transform and the PCA methods in preserving spectral and spatial information. Copyright ISPRS Numéro de notice : A2007-065 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.11.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.11.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28430
in ISPRS Journal of photogrammetry and remote sensing > vol 61 n° 6 (February 2007) . - pp 381 - 392[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-07021 SL Revue Centre de documentation Revues en salle Disponible MERIS in-flight spectral calibration / S. Delwart in International Journal of Remote Sensing IJRS, vol 28 n°3-4 (February 2007)
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Titre : MERIS in-flight spectral calibration Type de document : Article/Communication Auteurs : S. Delwart, Auteur ; R. Preusker, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 479 - 496 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] absorption
[Termes IGN] capteur en peigne
[Termes IGN] étalonnage en vol
[Termes IGN] étalonnage spectral
[Termes IGN] image à moyenne résolution
[Termes IGN] image spectrale
[Termes IGN] Medium Resolution Imaging Spectrometer
[Termes IGN] spectromètre imageurRésumé : (Auteur) This paper will describe the spectral calibration activities conducted during the MERIS commissioning phase and during operation since orbit 12000. MERIS is a medium resolution (300-1200m) push-broom imaging spectrometer covering the spectral domain 390-1040nm with 15 bands, programmable in position and width down to steps of 1.25nm. The onboard spectral calibration hardware is based on the use of an Erbium doped-diffuser panel presenting well-defined absorption peaks. In the spectral calibration mode, MERIS is configured with narrow bands centred on an Erbium absorption feature (two are used). The first orbit, the instrument is calibrated by viewing the "white" radiometric diffuser plate and the following orbit the "pink" Erbium diffuser plate is deployed. This method allows each of the MERIS detectors involved to be characterized in wavelength. The Fraunhofer absorption lines were used to complement these results by providing additional measurements in the violet and near infrared part of the spectrum. For this method, MERIS was configured both for Earth and diffuser observations and acquired data for only a limited number of orbits. This procedure was repeated for different band settings covering a number of Fraunhofer absorption lines. Finally, using Oxygen (O2A) absorption Earth observation data, two different approaches were developed, one based on the retrieval of surface pressure and one based on the shape of the O2A absorption band. Both methods were developed for clear sky land observations, but their performances are improved over bright land targets. Both methods agree to within an accuracy of 0.02 nm. The results from the different methods are analyzed in order to propose a spectral model for the MERIS instrument. Preliminary results of the spectral variation with time are reported. Except camera 4, the instrument is quite stable with time. Camera 4 needs further investigations to better understand its behaviour. Except for the use of the MERIS oxygen band, the spectral characterization of the other MERIS bands is achieved within the nominal accuracy (1 nm). Copyright Taylor & Francis Numéro de notice : A2007-089 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160600821119 En ligne : https://doi.org/10.1080/01431160600821119 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28454
in International Journal of Remote Sensing IJRS > vol 28 n°3-4 (February 2007) . - pp 479 - 496[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-07021 RAB Revue Centre de documentation En réserve L003 Disponible Radiometric correction of hemispherical images / A. Kuusk in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 6 (February 2007)
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Titre : Radiometric correction of hemispherical images Type de document : Article/Communication Auteurs : A. Kuusk, Auteur ; M. Paas, Auteur Année de publication : 2007 Article en page(s) : pp 405 - 413 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] angle de visée
[Termes IGN] canopée
[Termes IGN] capteur en peigne
[Termes IGN] correction radiométrique
[Termes IGN] diffusion du rayonnement
[Termes IGN] filtre de déchatoiement
[Termes IGN] filtre de Wiener
[Termes IGN] forêt
[Termes IGN] image hémisphérique
[Termes IGN] radiance
[Termes IGN] restauration d'image
[Termes IGN] tâche image d'un pointRésumé : (Auteur) Light scattering in fore-optics of imaging radiometric instruments degrades images, the signal of dark pixels is enhanced and that of bright pixels is reduced. A procedure of restoring hemispherical images obtained with a hemispheric view CCD-radiometer is suggested. The circular hemispheric image is projected onto the sphere and Wiener filtering on the sphere is performed. For building the Wiener filter the point spread function of the instrument was measured in the laboratory, and test images of (partially) controlled radiance were measured. The procedure is applied for the correction of hemispherical radiometric images taken under forest canopy. In non-corrected near infrared images the signal of sky pixels in forest canopy gaps near zenith is enhanced 1.4–2.0 times. The applied correction reduces this error to the level of 1.1–1.2. In the red channel these figures are 0.8–0.9 and 0.97–0.99, respectively. Copyright ISPRS Numéro de notice : A2007-066 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.10.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.10.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28431
in ISPRS Journal of photogrammetry and remote sensing > vol 61 n° 6 (February 2007) . - pp 405 - 413[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-07021 SL Revue Centre de documentation Revues en salle Disponible 2D building change detection from high resolution aerial images and correlation digital surface models / Nicolas Champion (2007)
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Titre : 2D building change detection from high resolution aerial images and correlation digital surface models Type de document : Article/Communication Auteurs : Nicolas Champion , Auteur
Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2007 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36-3-W49 Conférence : PIA 2007, ISPRS Conference on Photogrammetric Image Analysis 19/09/2007 21/09/2007 Munich Allemagne ISPRS OA Archives Importance : pp 197 - 202 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] actualité des données
[Termes IGN] base de données foncières
[Termes IGN] base de données topographiques
[Termes IGN] bâtiment
[Termes IGN] chaîne de traitement
[Termes IGN] détection de changement
[Termes IGN] détection du bâti
[Termes IGN] données localisées 2D
[Termes IGN] image 2D
[Termes IGN] image à haute résolution
[Termes IGN] image aérienne
[Termes IGN] image infrarouge
[Termes IGN] image RVB
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de terrainRésumé : (auteur) Updating 2D databases has become a crucial issue in most mapping agencies. Such a work traditionally starts out with a change detection phase. A subsequent update phase is then carried out to register changes in the up-to-date database. The first phase is by far the most costly and plodding, as it has until now required field or visual inspection (of orthophotos). The main goal of this paper is to present a new method for detecting changes in the building layer of a 2D cadastral database. This method aims at giving potential changes to a human operator for subsequent validation and update registration. In this paper, we propose a new workflow for the change detection process, by splitting it into 2 separate steps. The first step consists in verifying automatically buildings through a hypothesizeand verify process: the initial description of the database is used to guide the change detection process. The second step consists in extracting new buildings from geometric considerations. In this paper, the method is tested and assessed in a densely built-up area. A specific methodology is firstly employed to estimate the best parameters to use in the system and also to characterise its performance. Results are secondly assessed and show the high potential of our system in such a context. Numéro de notice : C2007-034 Affiliation des auteurs : MATIS (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/3-W49/PartA/papers/197_pia07.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92366 Documents numériques
en open access
2D Building... - pdf éditeurAdobe Acrobat PDFAutomatic extraction and classification of vegetation areas from high resolution images in urban areas / Corina Iovan (2007)
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Titre : Automatic extraction and classification of vegetation areas from high resolution images in urban areas Type de document : Article/Communication Auteurs : Corina Iovan , Auteur ; Didier Boldo
, Auteur ; Matthieu Cord, Auteur ; Mats Erikson, Auteur
Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2007 Conférence : SCIA 2007, 15th Scandinavian Conference on Image Analysis 10/06/2007 14/06/2007 Aalborg Danemark Proceedings Springer Importance : pp 858 - 867 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] extraction de la végétation
[Termes IGN] houppier
[Termes IGN] image aérienne
[Termes IGN] image optique
[Termes IGN] texture d'image
[Termes IGN] variable régionalisée
[Termes IGN] zone urbaine
[Termes IGN] zone urbaine denseRésumé : (auteur) This paper presents a complete high resolution aerial-images processing workflow to detect and characterize vegetation structures in high density urban areas. We present a hierarchical strategy to extract, analyze and delineate vegetation areas according to their height. To detect urban vegetation areas, we develop two methods, one using spectral indices and the second one based on a Support Vector Machines (SVM) classifier. Once vegetation areas detected, we differentiate lawns from treed areas by computing a texture operator on the Digital Surface Model (DSM). A robust region growing method based on the DSM is proposed for an accurate delineation of tree crowns. Delineation results are compared to results obtained by a Random Walk region growing technique for tree crown delineation. We evaluate the accuracy of the tree crown delineation results to a reference manual delineation. Results obtained are discussed and the influential factors are put forward. Numéro de notice : C2007-008 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE/INFORMATIQUE Nature : Poster nature-HAL : Poster-avec-CL DOI : 10.1007/978-3-540-73040-8_87 En ligne : http://dx.doi.org/10.1007/978-3-540-73040-8_87 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85951 Automatic extraction of urban vegetation structures from high resolution imagery and digital elevation models / Corina Iovan (2007)
PermalinkAutomatic man-made object extraction and 3D scene reconstruction from geomatic-images; Is there still a long way to go? / Nicolas Paparoditis (2007)
PermalinkDEM resolution dependencies of terrain attributes across a landscape / Y. Deng in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)
PermalinkDigital terrain model on vegetated areas: joint use of airborne Lidar data and optical images / Frédéric Bretar (2007)
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PermalinkERS-2 SAR and IRS-1C LISS III data fusion: a PCA approach to improve remote sensing based geological interpretation / T.J. Majumdar in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 5 (January 2007)
PermalinkEstimation of local forest attributes, utilizing two-phase sampling and auxiliary data / Sakari Tuominen (2007)
PermalinkExtraction of landcover themes out of aerial orthoimages in mountainous areas using external information / Arnaud Le Bris (2007)
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PermalinkPermalinkPermalinkMonitoring spatio-temporal dynamics of photosynthesis with a portable hyperspectral imaging system / U. Rascher in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 1 (January 2007)
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