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Path processing and block adjustment with RadarSat-1 SAR images / Thierry Toutin in IEEE Transactions on geoscience and remote sensing, vol 41 n° 10 (October 2003)
[article]
Titre : Path processing and block adjustment with RadarSat-1 SAR images Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur Année de publication : 2003 Article en page(s) : pp 2320 - 2328 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] angle de visée
[Termes IGN] compensation par bloc
[Termes IGN] image Radarsat
[Termes IGN] point d'appui
[Termes IGN] propagation d'erreurRésumé : (Auteur) The objectives of this research study was to determine the conditions of experimentation and application of path processing and block adjustment with synthetic aperture radar (SAR) images when few control is available. The path and block processing enabled the simultaneous adjustment of all images together to reduce the control point requirement. The method is based on the tridimensional physical model developed for multisensor images at the Canada Centre for Remote Sensing, Natural Resources processes were applied to 15 RADARSAT-1 SAR fine mode images (five paths by three rows) acquired over the Rocky Mountains, Canada from different look angles (F1 and F4) with a weak intersection geometry (6° angle). The first results of the least squares block adjustment showed that the same errors were obtained with image paths or block (20 m for three-image paths and five-path block) as with a single image (18 m). In addition to ground control points (GCPs), elevation tie points (ETPs), with a known elevation value, were used in the overlaps because the 6' look-angle difference of overlapping paths was small. However when using only GCPs in the outer paths for block adjustments, the error results deteriorated from 25 m in both directions for the three-path block to 270 m in X direction for the five-path block. This deterioration was a combination of the image pointing and cartographic errors of GCPs (25-30 m) and the weak 6° intersection angle. Consequently, GCP distribution every two paths was the solution with this dataset, and better results (35 m) was then achieved using a reduced number of GCPs in the outer paths (25 or even 10 GCPs) and middle path (six GCPs) and 20 ETPs in each overlap. However, the combined image pointing and cartographic errors of GCPs (25-30 m) are included in these 35-m error results, and the internal accuracy of the block should thus be better (around one resolution). Finally, the same minimum requirement of GCPs, as a function of their accuracy and the overlap intersection geometry, can be applied for an image, a path or a block. Numéro de notice : A2003-355 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.814661 En ligne : https://doi.org/10.1109/TGRS.2003.814661 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26435
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 10 (October 2003) . - pp 2320 - 2328[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-03101 RAB Revue Centre de documentation En réserve L003 Disponible Error tracking in Ikonos geometric processing using a 3D parametric model / Thierry Toutin in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 1 (January 2003)
[article]
Titre : Error tracking in Ikonos geometric processing using a 3D parametric model Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur Année de publication : 2003 Article en page(s) : pp 43 - 51 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classificateur paramétrique
[Termes IGN] compensation par faisceaux
[Termes IGN] correction géométrique
[Termes IGN] données localisées 3D
[Termes IGN] image Ikonos
[Termes IGN] modélisation géométrique de prise de vue
[Termes IGN] orthorectification
[Termes IGN] point d'appui
[Termes IGN] point de vérification
[Termes IGN] précision métrique
[Termes IGN] propagation d'erreurRésumé : (Auteur) Thirteen panchromatic (Pan) and multiband (XS) Ikonos Geoproduct images over seven study sites with various environments and terrain were tested using different cartographic data and accuracies with a 3D parametric model developed at the Canada Centre for Remote Sensing, Natural Resources Canada. The objectives of this study were to define the relationship between the final accuracy and the number and accuracy of input data, to track error propagation during the full geometric correction process (bundle adjustment and orthorectification), and to advise on the applicability of the model in operational environments.
When ground control points (GCPs) have an accuracy poorer than 3 m, 20 GGPs over the entire image are a good compromise to obtain a 3- to 4-m accuracy in the bundle adjustment. When GCP accuracy is better than 1 m, ten GCPs are enough to decrease the bundle adjustment error of either panchromatic or multiband images to 2 to 3 m. Because GGP residuals reflect the input data errors (map and/or plotting), these errors did not propagate through the 3D parametric model, and the internal accuracy of the geometric model is thus better (around a pixel or less).
Quantitative and qualitative evaluations of orthoimages were thus performed with either independent check points or overlaid digital vector files. Generally, the measured errors confirmed the predicted errors or were even slightly better, and a 2- to 4-m positioning accuracy was achieved for the orthoimages depending upon the elevation accuracy (DEM and grid spacing). To achieve a better final positioning accuracy, such as 1 m, a DEM with an accuracy of 1 to 2 m and with a fine grid spacing is required, in addition to welldefined GCPs with an accuracy of 1 m.Numéro de notice : A2003-001 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.1.43 En ligne : https://doi.org/10.14358/PERS.69.1.43 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22299
in Photogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 1 (January 2003) . - pp 43 - 51[article]Impact of terrain slope and aspect on radargrammetric DEM accuracy / Thierry Toutin in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 3 (December 2002 - January 2003)
[article]
Titre : Impact of terrain slope and aspect on radargrammetric DEM accuracy Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur Année de publication : 2002 Article en page(s) : pp 228 - 240 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] appariement d'images
[Termes IGN] couple stéréoscopique
[Termes IGN] image radar moirée
[Termes IGN] image Radarsat
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] modèle numérique de surface
[Termes IGN] pente
[Termes IGN] radargrammétrieRésumé : (Auteur) This paper shows results of digital elevation models (DEMs) generated from various RADARSAT stereopairs (fine, standard, extended) over three different topographic study sites (flattorolling, rollingtomountainous, mountainoustosteep) using 31) parametric modcling developed at the Canada Centre for Remote Sensing (CCRS) and an automated image matching method. Reference topographic DEMs were first used to compute terrain slope and aspect and then to evaluate the accuracy of the stereoderived DEMs as a function of the slopes and aspects. The DEM accuracy was almost linearly correlated with the terrain slope, with the larger errors in the steepest slopes. In addition, the stronger the stereo radar geometry, the more heterogeneous the DEM is. For the aspect, the best and worse results generally occurred in the foreslopes and backslopes, respectively, and there is no specific trend in the azimuth. Finally, the more pronounced the relief, the higher the correlation between the elevation accuracy and the aspect is and the larger the variations of the elevation accuracy are. Copyright ISPRS Numéro de notice : A2002-297 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00123-5 En ligne : https://doi.org/10.1016/S0924-2716(02)00123-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22208
in ISPRS Journal of photogrammetry and remote sensing > vol 57 n° 3 (December 2002 - January 2003) . - pp 228 - 240[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-02051 SL Revue Centre de documentation Revues en salle Disponible
Titre : Elevation modeling from satellite data : remote sensing Type de document : Chapitre/Contribution Auteurs : Thierry Toutin , Auteur Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2001 Importance : 30 p. Note générale : Bibliographie
in Encyclopedia of analytical chemistry - Online ISBN: 9780470027318 - DOI: 10.1002/9780470027318Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] image satellite
[Termes IGN] modèle numérique de surfaceIndex. décimale : 33.30 Photogrammétrie numérique Numéro de notice : 65591 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Chapître / contribution DOI : 10.1002/9780470027318.a2305 En ligne : http://doi.org/10.1002/9780470027318.a2305 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64075 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 65591-01 33.30 Tiré à part Centre de documentation Photogrammétrie - Lasergrammétrie Disponible State-of-art of elevation extraction from satellite SAR data / Thierry Toutin in ISPRS Journal of photogrammetry and remote sensing, vol 55 n° 1 (January - February 2000)
[article]
Titre : State-of-art of elevation extraction from satellite SAR data Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur ; L. Gray, Auteur Année de publication : 2000 Article en page(s) : pp 13 - 33 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] extraction
[Termes IGN] image radar moirée
[Termes IGN] image satellite
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de sursol
[Termes IGN] polarimétrie
[Termes IGN] radarclinométrie
[Termes IGN] stéréoscopieRésumé : (Documentaliste) Relative or absolute elevation extraction from satellite radar : performance and limitations of four different methods (clinometry, stereoscopy, interferometry and polarimetry) are reviewed, as well as their applicability to different satellite SAR sensors. Numéro de notice : A2000-050 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(99)00039-8 En ligne : https://doi.org/10.1016/S0924-2716(99)00039-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21470
in ISPRS Journal of photogrammetry and remote sensing > vol 55 n° 1 (January - February 2000) . - pp 13 - 33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-00011 SL Revue Centre de documentation Revues en salle Disponible Radarsat for stereoscopy: radar stereo pairs for DEM generation / Thierry Toutin in GIM international, vol 13 n° 1 (January 1999)PermalinkCartographie du relief par imagerie radar : l'état de l'art / Laurent Polidori in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 152 (Octobre 1998)PermalinkGénération de MNT par radargrammétrie : état de l'art et perspectives / Laurent Marinelli in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 148 (Octobre 1997)PermalinkAnalyse mathématique des possibilités cartographiques du système Spot / Thierry Toutin (1985)Permalink