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Segmentation of airborne laser scanning data using a slope adaptative neighbourhood / S. Filin in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 2 (April 2006) . - pp 71 - 80 Titre : Segmentation of airborne laser scanning data using a slope adaptative neighbourhood Type de document : Article/Communication Auteurs : S. Filin, Auteur ; Norbert Pfeifer, Auteur Année de publication : 2006 Article en page(s) : pp 71 - 80 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] analyse de groupement [Termes IGN] données laser [Termes IGN] extraction automatique [Termes IGN] lasergrammétrie [Termes IGN] pente [Termes IGN] plus proche voisin, algorithme du [Termes IGN] précision décimétrique [Termes IGN] segmentation d'image Résumé : (Auteur) This paper presents an algorithm for the segmentation of airborne laser scanning data. The segmentation is based on cluster analysis in a feature space. To improve the quality of the computed attributes, a recently proposed neighborhood system, called slope adaptive, is utilized. Key parameters of the laser data, e.g., point density, measurement accuracy, and horizontal and vertical point distribution, are used for defining the neighborhood among the measured points. Accounting for these parameters facilitates the computation of accurate and reliable attributes for the segmentation irrespective of point density and the 3D content of the data (step edges, layered surfaces, etc.) The segmentation with these attributes reveals more of the information that exists in the airborne laser scanning data. Copyright ISPRS Numéro de notice : A2006-140 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.10.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.10.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27867 [article]

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Determination and improvement of spatial resolution of the CCD-line-scanner system ADS40 / R. Reulke in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 2 (April 2006) . - pp 81 - 90 Titre : Determination and improvement of spatial resolution of the CCD-line-scanner system ADS40 Type de document : Article/Communication Auteurs : R. Reulke, Auteur ; S. Becker, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 81 - 90 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] ADS40 [Termes IGN] capteur aérien [Termes IGN] capteur spatial [Termes IGN] détecteur à transfert de charge [Termes IGN] image à haute résolution [Termes IGN] image panchromatique [Termes IGN] restauration d'image Résumé : (Auteur) Images that are collected for mapping purposes from airborne or space-borne sensors have to cover large areas by great image swaths at a high spatial resolution. These demands can be fulfilled by push-broom scanners featuring staggered line arrays, which are constructed from two identical CCD lines shifted against each other by half a pixel in line direction. Practical applications of such arrays in remote sensing include SPOT, and in the airborne environment the Airborne Digital Sensor, or ADS40, from Leica Geosystems. Furthermore, image restoration methods for enhancing the image quality can be applied to improve image quality and resolution. This paper presents an approach of high resolution image restitution from staggered lines and practical results with ADS40 high resolution panchromatic images. Copyright ISPRS Numéro de notice : A2006-141 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.10.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.10.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27868 [article]

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Consideration of smoothing techniques for hyperspectral remote sensing / C. Vaiphasa in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 2 (April 2006) . - pp 91 - 99 Titre : Consideration of smoothing techniques for hyperspectral remote sensing Type de document : Article/Communication Auteurs : C. Vaiphasa, Auteur Année de publication : 2006 Article en page(s) : pp 91 - 99 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] classification dirigée [Termes IGN] filtrage du bruit [Termes IGN] image hyperspectrale [Termes IGN] lissage de données [Termes IGN] modèle statistique Résumé : (Auteur) Spectral smoothing filters are popularly used in a large number of modern hyperspectral remote sensing studies for removing noise from the data. However, most of these studies subjectively apply ad hoc measures to select filter types and their parameters. We argue that this subjectively minded approach is not appropriate for choosing smoothing methods for hyperspectral applications. In our case study, it is proved that smoothing filters can cause undesirable changes to statistical characteristics of the spectral data ; thereby, affecting the results of the analyses that are based on statistical class models. If preserving statistical properties of the original hyperspectral data is desired, smoothing filters should then be used, if necessary, after careful consideration of which smoothing techniques will minimize disturbances to the statistical properties of the original data. A comparative t-test is proposed as a method for choosing a smoothing filter suitable for hyperspectral data at hand. Copyright ISPRS Numéro de notice : A2006-142 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.11.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.11.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27869 [article]

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Gaussian decomposition and calibration of a novel small-footprint full-waveform digitising airborne laser scanner / W. Wagner in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 2 (April 2006) . - pp 100 - 112 Titre : Gaussian decomposition and calibration of a novel small-footprint full-waveform digitising airborne laser scanner Type de document : Article/Communication Auteurs : W. Wagner, Auteur ; A. Ullrich, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 100 - 112 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] décomposition de Gauss [Termes IGN] empreinte [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] extraction [Termes IGN] impulsion laser [Termes IGN] instrumentation Riegl [Termes IGN] lasergrammétrie [Termes IGN] Lidar [Termes IGN] numérisation automatique [Termes IGN] onde électromagnétique [Termes IGN] rétrodiffusion [Termes IGN] signal laser [Termes IGN] télémètre laser aéroporté [Termes IGN] télémétrie laser aéroporté [Termes IGN] Vienne (capitale Autriche) Résumé : (Auteur) In this study, we use a technique referred to as Gaussian decomposition for processing and calibrating data acquired with a novel small-footprint airborne laser scanner that digitises the complete waveform of the laser pulses scattered back from the Earth's surface. This paper presents the theoretical basis for modelling the waveform as a series of Gaussian pulses. In this way the range, amplitude, and width are provided for each pulse. Using external reference targets it is also possible to calibrate the data. The calibration equation takes into account the range, the amplitude, and pulse width and provides estimates of the backscatter cross-section of each target. The applicability of this technique is demonstrated based on RIEGL LMS-Q560 data acquired over the city of Vienna. Copyright ISPRS Numéro de notice : A2006-143 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.12.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.12.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27870 [article]

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Coal fire mapping from satellite thermal IR data: a case example in Jharia Coalfield, Jharkhand, India / R.S. Chatterjee in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 2 (April 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 2 (April 2006) . - pp 113 - 128 Titre : Coal fire mapping from satellite thermal IR data: a case example in Jharia Coalfield, Jharkhand, India Type de document : Article/Communication Auteurs : R.S. Chatterjee, Auteur Année de publication : 2006 Article en page(s) : pp 113 - 128 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bande infrarouge [Termes IGN] charbon [Termes IGN] exitance spectrale [Termes IGN] image Landsat-TM [Termes IGN] impact sur l'environnement [Termes IGN] incendie [Termes IGN] Inde [Termes IGN] pollution atmosphérique [Termes IGN] rayonnement infrarouge thermique [Termes IGN] température de surface Résumé : (Auteur) Coal fire has been found to be a serious problem worldwide in coal mining processes. Coal fire burns valuable coal reserve and prevents access to proven reserve in the affected area. Moreover, it leads to severe environmental degradation of the region by an overall increase of the ambient atmospheric temperature, by the emission of obnoxious gases (e.g., SO2, NO, CO, CH4) along fissures and cracks and by causing land subsidence and collapse. Jharia Coalfield, Jharkhand, India, is known for being the exclusive storehouse of prime coking coal as well as for hosting the maximum number of known coal fires among all the coalfields in the country. In this paper, some of the important issues of coal fire mapping from satellite thermal IR data have been addressed in particular reference to Jharia Coalfield. Namely, these are: retrieval of true spectral radiance from raw digital data using scene-specific calibration coefficients of the detectors, thermal emissivity of surface materials to obtain kinetic temperature at each ground resolution cell of satellite data, field-based modelling of pixel-integrated temperature for differentiating surface and subsurface fire pixels in Landsat TM thermal IR data, identification of surface coal fire locations from reflected IR data and lateral propagation of coal fire. Copyright ISPRS Numéro de notice : A2006-144 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.12.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.12.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27871 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-06021	SL	Revue	Centre de documentation	Revues en salle	Disponible