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Estimating sub-pixel surface roughness using remotely sensed stereoscopic data / A. Mushkin in Remote sensing of environment, vol 99 n° 1-2 (15 November 2005)
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Titre : Estimating sub-pixel surface roughness using remotely sensed stereoscopic data Type de document : Article/Communication Auteurs : A. Mushkin, Auteur ; A.R. Gillepsie, Auteur Année de publication : 2005 Article en page(s) : pp 75 - 83 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse infrapixellaire
[Termes IGN] Californie (Etats-Unis)
[Termes IGN] désert
[Termes IGN] image Terra-ASTER
[Termes IGN] Israël
[Termes IGN] modèle stéréoscopique
[Termes IGN] ombre
[Termes IGN] radiance
[Termes IGN] rugosité du solRésumé : (Auteur) Surface roughness at the scale of 10-2-10-1 m can be estimated using the ratio (RR) between surface-reflected solar radiance measured from two view angles at nearly the same time. As RR is primarily a function of the difference between effective sub-pixel shading observed from the two view-angles, the divergence from unity RR values, which are expected for smooth Lambertian surfaces (they have no shadows), was found to be proportional to roughness at the 10-2-10-1 m scale of geomorphic desert surfaces. Ground-based RR values at 1-m resolution, as well as remotely acquired RR values at 4-, 15- and 50-m resolutions, were compared with observed surface roughness in two hyperarid test sites, located in Death Valley, California, USA and the southem Negev Desert in Israel. The ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) 15-m stereoscopic capability is identified as an effective resource for obtaining relative subpixel surface-roughness estimates that are largely independent of surface composition and relatively insensitive to atmospheric effects. Numéro de notice : A2005-441 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2005.02.018 En ligne : https://doi.org/10.1016/j.rse.2005.02.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27577
in Remote sensing of environment > vol 99 n° 1-2 (15 November 2005) . - pp 75 - 83[article]Relating SAR image texture to the biomass of regenerating tropical forests / T.M. Kuplich in International Journal of Remote Sensing IJRS, vol 26 n° 21 (November 2005)
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Titre : Relating SAR image texture to the biomass of regenerating tropical forests Type de document : Article/Communication Auteurs : T.M. Kuplich, Auteur ; P.J. Curran, Auteur ; P.M. Atkinson, Auteur Année de publication : 2005 Article en page(s) : pp 4829 - 4854 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande L
[Termes IGN] canopée
[Termes IGN] forêt tropicale
[Termes IGN] image JERS
[Termes IGN] image radar
[Termes IGN] Manaus
[Termes IGN] masse végétale
[Termes IGN] niveau de gris (image)
[Termes IGN] teneur en carbone
[Termes IGN] texture d'image
[Termes IGN] variogrammeRésumé : (Auteur) An accurate global carbon budget requires information on terrestrial carbon sink strength. Regenerating tropical forests are known to be important terrestrial carbon sinks but information on their location, extent and biomass (from which carbon content can be estimated) is incomplete. The use of remotely sensed data in optical wavelengths has been of limited use due to both the weak relationship between optical radiation and forest biomass and near-constant cloud cover in the tropics. L-band Synthetic Aperture Radar (SAR) backscatter, however, is related positively to biomass (but only up to an asymptote of around 40-90T ha-1) and can be obtained independently of cloud cover. Both canopy structure and biomass change over time as pioneer species are replaced by early and late regenerating species. These structural changes are related to an increase in (i) tree height, (ii) tree species richness and (iii) canopy thickness and influence the roughness of the canopy surface and consequently SAR image texture. Therefore, we investigated the degree to which textural information could be used to increase the correlation between image tone (backscatter) and biomass. Field data were used to estimate the biomass of 37 regenerating forests plots in Brazilian Amazonia. Texture measures derived from local statistics, the grey level co-occurrence matrix (GLCM) and the variogram were evaluated using simulated images on the basis of their ability to identify significant differences in image texture independently of image contrast. The selected texture measures were applied to L-band JERS-1 (Japanese Earth Resources Satellite) SAR images and the correlation between backscatter and biomass was determined for regenerating tropical forests. A strong correlation was found for the texture measures and biomass. The ra2 (adjusted coefficient of determination), measuring the correlation between backscatter and biomass, increased from 0.74 to 0.82 with the addition of GLCM-derived contrast. The addition of image texture (GLCM-derived contrast) to image tone (backscatter) potentially increases the accuracy with which JERS-1 SAR data can be used to estimate biomass in tropical forests. Numéro de notice : A2005-469 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500239107 En ligne : https://doi.org/10.1080/01431160500239107 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27605
in International Journal of Remote Sensing IJRS > vol 26 n° 21 (November 2005) . - pp 4829 - 4854[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-05211 RAB Revue Centre de documentation En réserve L003 Disponible LAI retrieval from multiangular image classification and inversion of a ray tracing model / R. Casa in Remote sensing of environment, vol 98 n° 4 (30/10/2005)
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Titre : LAI retrieval from multiangular image classification and inversion of a ray tracing model Type de document : Article/Communication Auteurs : R. Casa, Auteur ; H.G. Jones, Auteur Année de publication : 2005 Article en page(s) : pp 414 - 428 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] classification dirigée
[Termes IGN] couvert végétal
[Termes IGN] cultures
[Termes IGN] image multiangulaire
[Termes IGN] Italie
[Termes IGN] lancer de rayons
[Termes IGN] Leaf Area Index
[Termes IGN] modèle d'inversion
[Termes IGN] modèle de diffusion du rayonnement
[Termes IGN] pomme de terre
[Termes IGN] rayonnement infrarouge
[Termes IGN] réflectance végétaleRésumé : (Auteur) A non-conventional approach for the estimation of leaf area index (LAI) and leaf angle distribution (LAD), based on the use of information contained in multiangular images and the inversion of a canopy ray tracing model, is proposed in this work. As an alternative to the use of overall image reflectance data, the image fraction components, i.e. sunlit and shaded leaves and soil, are obtained by supervised classification of groundbased multiangular images acquired using an inexpensive colour infrared camera, the Dycam ADC. These data are used for the inversion of a numerical model of a vegetation canopy in which the latter is described as composed of randomly distributed disks (leaves). The model was developed using the POV-ray ray tracer. Model inversion is carried out using the look-up-table approach. The proposed methodology was tested using an extensive data set gathered on the potato crop during experimental trials carried out at Viterbo (Italy) for 3 years. The results show that LAI was successfully estimated with a RMSE varying from 0.29 to 0.75 in the different years. The potential sources of error in both estimated and measured LAI values are extensively discussed. Numéro de notice : A2005-433 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2005.08.005 En ligne : https://doi.org/10.1016/j.rse.2005.08.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27569
in Remote sensing of environment > vol 98 n° 4 (30/10/2005) . - pp 414 - 428[article]Integrated shadow removal based on photogrammetry and image analysis / Y. Li in International Journal of Remote Sensing IJRS, vol 26 n° 18 (September 2005)
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Titre : Integrated shadow removal based on photogrammetry and image analysis Type de document : Article/Communication Auteurs : Y. Li, Auteur ; P. Gong, Auteur ; T. Sasagawa, Auteur Année de publication : 2005 Article en page(s) : pp 3911 - 3929 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] ADS40
[Termes IGN] détection automatique
[Termes IGN] image à haute résolution
[Termes IGN] image aérienne
[Termes IGN] image RVB
[Termes IGN] lancer de rayons
[Termes IGN] milieu urbain
[Termes IGN] modèle numérique de surface
[Termes IGN] ombre
[Termes IGN] rayonnement solaire
[Termes IGN] segmentation d'image
[Termes IGN] seuillage d'image
[Termes IGN] système d'information géographiqueRésumé : (Auteur) This paper presents a methodology to automatically detect and remove the shadows in high-resolution urban aerial images for urban GIS applications. The image is generated by ADS40, which is a multiple line scanner. The system includes shadow simulation, ray tracing, integrated shadow detection. and shadow removal. The geodetic shadow is simulated from a digital surface model (DSM) and the sun attitude. Using an ADS40 camera model and collinearity equations, the corresponding scan line of the shadow is obtained. Ray tracing is used to determine the visibility of the shadow in the image. A building boundary driven height field ray tracing method is proposed to boost the tracing efficiency. Shadow segmentation is taken from the RGB image at the base of the traced image shadows. The segmentation threshold is derived from the histogram of the traced image shadow area. Shadow removal includes the shadow region and companion region labelling, the histogram processing, and intensity mapping. Some experiment results are presented to show the effectiveness of the methods. Numéro de notice : A2005-428 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500159347 En ligne : https://doi.org/10.1080/01431160500159347 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27564
in International Journal of Remote Sensing IJRS > vol 26 n° 18 (September 2005) . - pp 3911 - 3929[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-05181 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Spectral variability and bidirectional reflectance behaviour of urban materials at a 20 cm spatial resolution in the visible and near‐infrared wavelengths. A case study over Toulouse (France) / Sophie Lacherade in International Journal of Remote Sensing IJRS, vol 26 n° 17 (September 2005)
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Titre : Spectral variability and bidirectional reflectance behaviour of urban materials at a 20 cm spatial resolution in the visible and near‐infrared wavelengths. A case study over Toulouse (France) Type de document : Article/Communication Auteurs : Sophie Lacherade, Auteur ; Christophe Miesch, Auteur ; Xavier Briottet , Auteur ; Hervé Le Men
, Auteur
Année de publication : 2005 Article en page(s) : pp 3859 - 3866 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] rayonnement lumineux
[Termes IGN] rayonnement proche infrarouge
[Termes IGN] réflectance directionnelle
[Termes IGN] réflectance urbaine
[Termes IGN] scène urbaine
[Termes IGN] Toulouse
[Termes IGN] zone urbaineRésumé : (auteur) This letter presents an experiment carried out in Toulouse in May 2004 to study the spectral variability and bidirectional reflectance behaviour of urban materials. The measurements were carried out at a 20 cm spatial resolution in the visible and near‐infrared (350–2500 nm). These measurements allow quantification of three main types of reflectance spatial variability. In addition to these in situ experiments, the bidirectional properties of urban material samples were studied in the laboratory with a goniometer. Numéro de notice : A2005-613 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500177414 Date de publication en ligne : 12/04/2011 En ligne : https://doi.org/10.1080/01431160500177414 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99568
in International Journal of Remote Sensing IJRS > vol 26 n° 17 (September 2005) . - pp 3859 - 3866[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-05171 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Cloud-free satellite image mosaics with regression trees and histogram matching / E.H. Helmert in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 9 (September 2005)
PermalinkDevelopment of a robust photogrammetric metrology system for monitoring the healing of bedsores [... pour la surveillance de la guérison des escarres] / A. Malian in Photogrammetric record, vol 20 n° 111 (September - November 2005)
PermalinkMultispectral Thermal Imager: mission and applications overview / J.J. Szymanski in IEEE Transactions on geoscience and remote sensing, vol 43 n° 9 (September 2005)
PermalinkProblèmes relatifs aux ombres d'objets élevés sur les photographies aériennes / Raymond d' Hollander in XYZ, n° 104 (septembre - novembre 2005)
PermalinkRemote sensing of water quality for Burullus lake, Egypt / Kh. M. Dewidar in Geocarto international, vol 20 n° 3 (September - November 2005)
PermalinkPreliminary study of Grid computing for remotely sensed information / Y. Xue in International Journal of Remote Sensing IJRS, vol 26 n° 16 (August 2005)
PermalinkDe-shadowing of satellite/airborne imagery / R. Richter in International Journal of Remote Sensing IJRS, vol 26 n° 15 (August 2005)
PermalinkSpectral and radiometric requirements for the airborne thermal imaging spectrometer ARES / R. Richter in International Journal of Remote Sensing IJRS, vol 26 n° 15 (August 2005)
PermalinkEmissivity maps to retrieve land-surface temperature from MSG/SEVIRI / L.F. Peres in IEEE Transactions on geoscience and remote sensing, vol 43 n° 8 (August 2005)
PermalinkIonospheric modeling: the key to GNSS ambiguity resolution / T. Richert in GPS world, vol 16 n° 6 (June 2005)
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