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Vision with non-traditional sensors, 26th workshop of the Austrian Association for Pattern Recognition (ÖAGM/AAPR), Graz, September 10 - 11, 2002 / Franz W. Leberl (2002)
Titre : Vision with non-traditional sensors, 26th workshop of the Austrian Association for Pattern Recognition (ÖAGM/AAPR), Graz, September 10 - 11, 2002 Type de document : Actes de congrès Auteurs : Franz W. Leberl, Éditeur scientifique ; Friedrich Fraundorfer, Éditeur scientifique Editeur : Vienne [Autriche] : Österreichische Computer Gesellschaft OCG = Austrian Computer Society Année de publication : 2002 Conférence : AAPR 2002, 26th Workshop of the Austrian Association for Pattern Recognition (ÖAGM/AAPR), Vision with non-traditional sensors 10/09/2002 11/09/2002 Graz Autriche Importance : 348 p. Format : 15 x 21 cm ISBN/ISSN/EAN : 978-3-85403-160-4 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse texturale
[Termes IGN] apprentissage automatique
[Termes IGN] chambre CMOS
[Termes IGN] chambre panoramique
[Termes IGN] modèle logique de données
[Termes IGN] reconnaissance d'objets
[Termes IGN] reconnaissance de formes
[Termes IGN] reconstruction 3DRésumé : (éditeur) The continuous evolution of new vision algorithms and the broad availability of high computational power leads to applications beyond traditional CCD-Imaging. Selected examples for these non-traditional sensors are: panoramic cameras, high resolution cameras, microscopes or CMOS-cameras.
The focus topic of the 26th Workshop of the OAGM is therefore new sensing technology and the discussion of vision algorithms especially designed for these sensors.Note de contenu : - Multiple View and Reconstruction
- Object Recognition
- Data Structures
- Robotics and Learning
- Tracking
- Image Processing and Texture AnalysisNuméro de notice : 19872 Affiliation des auteurs : non IGN Thématique : IMAGERIE/INFORMATIQUE Nature : Actes DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86076 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19872-01 CG2002 Livre Centre de documentation Congrès Disponible Application of airborne scanning laser altimetry to the study of the tidal channel geomorphology / Bharat Lohani in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 2 (December 2001 - March 2002)
[article]
Titre : Application of airborne scanning laser altimetry to the study of the tidal channel geomorphology Type de document : Article/Communication Auteurs : Bharat Lohani, Auteur ; D.C. Mason, Auteur Année de publication : 2001 Article en page(s) : pp 100 - 120 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] estuaire
[Termes IGN] extraction
[Termes IGN] géomorphologie
[Termes IGN] marée océanique
[Termes IGN] marégraphie
[Termes IGN] océanographie dynamique
[Termes IGN] sédimentologie
[Termes IGN] segmentation d'image
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Tidal channel play a fundamental role in the hydrodynamic and morphological processes operating within a tidal basin. Conventional means of mapping intertidal zones are either too cumbersome or do not provide sufficient information for accurate quantitative measurements of the channels. This paper describes the use of the airborne scanning altimetry (light detection and ranging-LIDAR) for studying tidal channel morphology. The main emphasis is on developing a technique for extracting tidal channels from LiDAR data. Some common existing techniques of fluvial channel extraction are evaluated with LiDAR data of tidal basins and found moderate in performance. A semiautomatic approach is proposed which has a performance better than that of existing techniques. This approach is realised using an adaptative height thresholding technique to locate channel fragments. A channel joining mechanism then connects the channel fragment using weighted distance transform. The paper also describes briefly an automatic procedure to carry out measurments on the basin image and derive geomorphological parameters such as drainage density. The results obtained illustrate differences in the geomorphology of tidal and terrestrial basins. Copyright ISPRS Numéro de notice : A2001-209 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(01)00041-7 En ligne : https://doi.org/10.1016/S0924-2716(01)00041-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21903
in ISPRS Journal of photogrammetry and remote sensing > vol 56 n° 2 (December 2001 - March 2002) . - pp 100 - 120[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-01031 SL Revue Centre de documentation Revues en salle Disponible Image processing of airborne scanning laser altimetry data for improved river flood modelling / D.M. Cobby in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 2 (December 2001 - March 2002)
[article]
Titre : Image processing of airborne scanning laser altimetry data for improved river flood modelling Type de document : Article/Communication Auteurs : D.M. Cobby, Auteur ; D.C. Mason, Auteur ; Ian J. Davenport, Auteur Année de publication : 2001 Article en page(s) : pp 121 - 138 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] détection de contours
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] erreur moyenne quadratique
[Termes IGN] extraction
[Termes IGN] inondation
[Termes IGN] modèle de simulation
[Termes IGN] modèle hydrographique
[Termes IGN] prévention des risques
[Termes IGN] segmentation d'image
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Airborne scanning laser altimetry (LiDAR) is an important new data source for environmental applications, being able to map topographic height, and the height of surface objects, to high vertical and horizontal accuracy over large areas. This paper describes a range image segmentation system for data from a LiDAR measuring either time of last significant return, or measuring time of both first and last returns. We focus on the application of the segmenter to improving the data required by 2D hydraulic flood models, i.e. maps of topographic height which provide model bathymetry, and vegetation height, which could be converted to distributed floodplain friction coefficients. In addition, the location of river channels and a suitable height contour are used to define the extent of the model domain. An advantage of segmentation is that it allows different topographic and vegetation height extraction algorithms to be used in regions of different cover type. LiDAR data for a reach of the River Severn, UK, is presented. Short vegetation heights (grass and cereal crops) are predicted with a rms error of 14 em. The topography underlying such cover differs from manually measured spot heights by 17 em (rms error). The topographic accuracy decreases in the presence of a densely wooded slope. Errors in the vegetation height map, apparent at the overlap regions of adjacent swaths, are reduced by the removal of heights measured at large scan angles. Copyright ISPRS Numéro de notice : A2001-208 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(01)00039-9 En ligne : https://doi.org/10.1016/S0924-2716(01)00039-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21902
in ISPRS Journal of photogrammetry and remote sensing > vol 56 n° 2 (December 2001 - March 2002) . - pp 121 - 138[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-01031 SL Revue Centre de documentation Revues en salle Disponible Revealing the anatomy of cities through spectral mixture analysis of multispectral satellite imagery: a case study of the greater Cairo region, Egypt / T. Rashed in Geocarto international, vol 16 n° 4 (December 2001 - February 2002)
[article]
Titre : Revealing the anatomy of cities through spectral mixture analysis of multispectral satellite imagery: a case study of the greater Cairo region, Egypt Type de document : Article/Communication Auteurs : T. Rashed, Auteur ; J.R. Weeks, Auteur ; M.S. Gadalla, Auteur ; A. Hill, Auteur Année de publication : 2001 Article en page(s) : pp 5 - 15 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] analyse spectrale
[Termes IGN] carte d'occupation du sol
[Termes IGN] classification dirigée
[Termes IGN] Egypte
[Termes IGN] image multibande
[Termes IGN] milieu urbain
[Termes IGN] occupation du solRésumé : (Auteur) This paper examines the feasibility of spectral mixture analysis (SMA) in deriving comparable physical measures of urban land cover that describe the morphological characteristics of cities. SMA offers a way of analyzing satellite imagery of urban areas that may be superior to more standard methods of classification. Mixing models are based on the assumption that the remotely measured spectrum of a given pixel can be modeled as a combination of pure spectra, called endmembers. SMA, using four image endmembers (vegetation, impervious surface, soil, and shade), was applied to an IRS-1C multispectral image in order to extract measures that describe the anatomy of the Greater Cairo region, Egypt, in terms of endmember fractions. The resulting fractions were then used to classify the urban scene into eight classes of natural and human-built features through a decision tree (DT) classifier. The accuracy of the DT classification was compared to the accuracies of two per-pixel supervised classifications of the IRS-1C image employing maximum likelihood (ML) and minimum distance-to-means (MDM) classifiers. Overall KAPPA accuracies were 0. 88 for the DT classification based on SMA fractions, and 0.60 and 0.45 for the classifications conducted through ML and MDM respectively. Numéro de notice : A2002-038 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040108542210 En ligne : https://doi.org/10.1080/10106040108542210 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21955
in Geocarto international > vol 16 n° 4 (December 2001 - February 2002) . - pp 5 - 15[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-01041 RAB Revue Centre de documentation En réserve L003 Disponible A robust texture analysis and classification approach for urban land-use and land-cover feature discrimination / S.W. Myint in Geocarto international, vol 16 n° 4 (December 2001 - February 2002)
[article]
Titre : A robust texture analysis and classification approach for urban land-use and land-cover feature discrimination Type de document : Article/Communication Auteurs : S.W. Myint, Auteur Année de publication : 2001 Article en page(s) : pp 27 - 38 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse d'image numérique
[Termes IGN] analyse discriminante
[Termes IGN] analyse texturale
[Termes IGN] base de données d'occupation du sol
[Termes IGN] image multibande
[Termes IGN] méthode robuste
[Termes IGN] occupation du sol
[Termes IGN] photo-interprétation
[Termes IGN] reconnaissance d'objets
[Termes IGN] transformation en ondelettes
[Termes IGN] utilisation du solRésumé : (Auteur) Attempts to analyze urban features and to classify land use and land cover directly from high-resolution satellite data with traditional computer classification techniques have proven to be inefficient for two primary reasons. First, urban landscapes are composed of complex features. Second, traditional classifiers employ spectral information based on single pixel value and ignore a great amount of spatial information. Texture plays an important role in image segmentation and object recognition, as well as in interpretation of images in a variety of applications. This study analyzes urban texture features in multi-spectral image data. Recent developments in the very powerful mathematical theory of wavelet transforms have received overwhelming attention by image analysts. An evaluation of the ability of wavelet transform in urban feature extraction and classification was performed in this study, with six types of urban land cover features classified. The preliminary results of this research indicate that the accuracy of texture analysis in classifying urban features in fine resolution image data could be significantly improved with the use of wavelet transform approach. Numéro de notice : A2002-039 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040108542212 En ligne : https://doi.org/10.1080/10106040108542212 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21956
in Geocarto international > vol 16 n° 4 (December 2001 - February 2002) . - pp 27 - 38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-01041 RAB Revue Centre de documentation En réserve L003 Disponible Use of very high spatial resolution remotely sensed imagery for assessing land-cover changes in shrub habitat preserves of the southern California / P. Longmire in Geocarto international, vol 16 n° 4 (December 2001 - February 2002)PermalinkSemi-automatic building extraction: a system on set of predefined building primitives / Eberhard Gülch in GIM international, vol 15 n° 11 (November 2001)PermalinkSurface matching and change detection using a modified Hough transformation for robust parameter estimation / A.F. Habib in Photogrammetric record, vol 17 n° 98 (October 2001 - March 2002)PermalinkAnalysis of surface changes using primitive events / Yukio Sadahiro in International journal of geographical information science IJGIS, vol 15 n° 6 (september 2001)PermalinkRock glacier mapping: a method utilizing enhanced TM data and GIS modeling techniques / J.R. Janke in Geocarto international, vol 16 n° 3 (September - November 2001)PermalinkUsing GPS to detect vertical movement along a leveling line in Imperial valley, California / W. Parks in Surveying and land information systems, vol 61 n° 3 (01/09/2001)PermalinkBest-bases feature extraction algorithms for classification of hyperspectral data / Satish Kumar in IEEE Transactions on geoscience and remote sensing, vol 39 n° 7 (July 2001)PermalinkDetection of interannual vegetation responses to climatic variability using AVIRIS data in a coastal savanna in California / M. Garcia in IEEE Transactions on geoscience and remote sensing, vol 39 n° 7 (July 2001)PermalinkHyperspectral subpixel target detection using the linear mixing model / D. Manolakis in IEEE Transactions on geoscience and remote sensing, vol 39 n° 7 (July 2001)PermalinkA new search algorithm for feature selection in hyperspectral remote sensing images / S.B. Serpico in IEEE Transactions on geoscience and remote sensing, vol 39 n° 7 (July 2001)Permalink