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Analysis of rigorous orientation models for pushbroom sensors: applications with Quickbird / M. Crespi in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)  

Public [article]  inRevue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 23 - 28 Titre : Analysis of rigorous orientation models for pushbroom sensors: applications with Quickbird Type de document : Article/Communication Auteurs : M. Crespi, Auteur ; Francesca Giannone, Auteur ; Daniela Poli, Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 23 - 28 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] capteur en peigne [Termes IGN] colinéarité [Termes IGN] compensation par faisceaux [Termes IGN] couple stéréoscopique [Termes IGN] élément d'orientation externe [Termes IGN] géométrie de l'image [Termes IGN] géoréférencement direct [Termes IGN] image EROS [Termes IGN] image isolée [Termes IGN] image Quickbird [Termes IGN] modèle numérique de terrain [Termes IGN] orbitographie par GNSS [Termes IGN] orientation du capteur [Termes IGN] orientation externe [Termes IGN] orientation interne [Termes IGN] OrthoEngine [Termes IGN] orthorectification [Termes IGN] point d'appui Résumé : (Auteur) The correct georeferencing of remote sensing images is a fundamental task in the photogrammetric processing for orthoimages and DEM generation and for feature extraction. In this paper, we focus on the georeferencing of pushbroom sensors with rigorous models, that is, approaches that are based on the photogrammetric collinearity equations and describe the exact acquisition geometry of the sensors. By solving a bundle adjustment, the sensor external orientation and additional geometric parameters describing the internal orientation are estimated. We tested two rigorous models developed in academic groups for the georeferencing of a stereopair from QuickBird. The first model (M1) has been implemented at the University La Sapienza, Rome. It is specifically designed for the orthorectification of pushbroom sensors carried on satellite platforms with asynchronous acquisition mode, like EROS-A and QuickBird. The model, implemented in the software SISAR, reconstructs of the orbital segment during the image acquisition through the knowledge of Keplerian orbital parameters, the sensor attitude, internal orientation and the self-calibration parameters. The second model (M2) is a rigorous sensor model for pushbroom linear array sensors, carried on airborne or spaceborne platforms. It estimates the parameters modelling the sensor internal and external orientation through a bundle adjustment, using a suitable number of ground control points. Our research included the orientation of the single images with rigorous model M1, the orientation of the stereo pair with rigorous model M2 and the comparison of the results with a rigorous model contained in commercial software (PCI OrthoEngine). The results demonstrate that by using rigorous models it is possible to achieve RMSE smaller than 1 pixel in the GPs if a sufficient number of GCPs are used. Copyright SFPT Numéro de notice : A2006-633 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/T02-07.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28356 [article]

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Estimation of the number of decomposition levels for a wavelet-based multiresolution multisensor image fusion / P. Pradhan in IEEE Transactions on geoscience and remote sensing, vol 44 n° 12 (December 2006)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 44 n° 12 (December 2006) . - pp 3674 - 3686 Titre : Estimation of the number of decomposition levels for a wavelet-based multiresolution multisensor image fusion Type de document : Article/Communication Auteurs : P. Pradhan, Auteur ; R.l. King, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 3674 - 3686 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] fusion d'images [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] limite de résolution géométrique [Termes IGN] qualité géométrique (image) [Termes IGN] qualité radiométrique (image) [Termes IGN] transformation en ondelettes Résumé : (Auteur) The wavelet-based scheme for the fusion of multispectral (MS) and panchromatic (PAN) imagery has become quite popular due to its ability to preserve the spectral fidelity of the MS imagery while improving its spatial quality. This is important if the resultant imagery is used for automatic classification. Wavelet-based fusion results depend on the number of decomposition levels applied in the wavelet transform. Too few decomposition levels result in poor spatial quality fused images. On the other hand, too many levels reduce the spectral similarity between the original MS and the pan-sharpened images. If the shift-invariant wavelet transform is applied, each excessive decomposition level results in a large computational penalty. Thus, the choice of the number of decomposition levels is significant. In this paper, PAN and MS image pairs with different resolution ratios were fused using the shift-invariant wavelet transform, and the optimal decomposition levels were determined for each resolution ratio. In general, it can be said that the fusion of images with larger resolution ratios requires a higher number of decomposition levels. This paper provides the practitioner an understanding of the tradeoffs associated with the computational demand and the spatial and spectral quality of the wavelet-based fusion algorithm as a function of the number of decomposition levels. Copyright IEEE Numéro de notice : A2006-560 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2006.881758 En ligne : https://doi.org/10.1109/TGRS.2006.881758 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28283 [article]

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Integration of GPS and remote sensing into GIS: a case study of rectifying satellite imagery using uncorrected coordinates in different scenes / J. Gao in Geocarto international, vol 21 n° 4 (December 2006 - February 2007)  

Public [article]  inGeocarto international > vol 21 n° 4 (December 2006 - February 2007) . - pp 59 - 65 Titre : Integration of GPS and remote sensing into GIS: a case study of rectifying satellite imagery using uncorrected coordinates in different scenes Type de document : Article/Communication Auteurs : J. Gao, Auteur ; Y. Zha, Auteur Année de publication : 2006 Article en page(s) : pp 59 - 65 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] base de données localisées [Termes IGN] carte topographique [Termes IGN] coordonnées GPS [Termes IGN] correction d'image [Termes IGN] géoréférencement [Termes IGN] image Landsat-TM [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] image SPOT [Termes IGN] limite de résolution géométrique [Termes IGN] point d'appui [Termes IGN] positionnement par GPS [Termes IGN] système d'information géographique Résumé : (Auteur) This paper explores the feasibility of integrating GPS and remote sensing data into a GIS database through rectification of satellite images of both urban and rural areas using uncorrected GPS coordinates. A GPS receiver was used to log the coordinates of 25 ground control points (GCPs) in a rural area and 20 GCPs in an urban area. Their coordinates were also read from topographic maps. Both sets of coordinates were used to rectify Landsat TM, and SPOT panchromatic (PAN) and multispectral (XL) images. It is found that none of the GPS coordinates are able to achieve an acceptable accuracy level of integration unless some inaccurate GCPs are excluded. The percentage of useable GCPs varies from less than 50 to nearly 90, depending on the spatial resolution of the image and the ease of GCP identification. On average, the difficulty in identifying GCPs on the ground and the image degrades integration accuracy by up to one pixel. Copyright Geocarto international Numéro de notice : A2006-587 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040608542403 Date de publication en ligne : 04/01/2008 En ligne : https://doi.org/10.1080/10106040608542403 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28310 [article]

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The Pleiades-HR mosaic system product / Françoise de Lussy in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)    

Public [article]  contenu dans ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, 2. Tome 2 / Alain Baudoin (2006)   inRevue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 70 - 75 Titre : The Pleiades-HR mosaic system product Type de document : Article/Communication Auteurs : Françoise de Lussy, Auteur ; Patrick Gigord, Auteur ; Sylvain Airault , Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 70 - 75 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] image à résolution submétrique [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] image Pléiades-HR [Termes IGN] limite de résolution géométrique [Termes IGN] mosaïquage d'images [Termes IGN] orthoimage [Termes IGN] orthophotoplan numérique [Termes IGN] Pleiades-HR [Termes IGN] satellite agile [Termes IGN] valeur radiométrique Résumé : (Auteur) Pleiades is the highest resolution civilian earth observing system ever developed in Europe. This imagery program is conducted by the French National Space Agency, CNES. It will operate in 2009-2010 two agile satellites designed to provide optical images to civilian and defense users. Images will be simultaneously acquired in Panchromatic (PA) and multispectral (XS) mode, which allows, in Nadir acquisition condition, to deliver 20 km wide, false or natural colored scenes with a 70 cm ground sampling distance after PA+XS fusion. Imaging capabilities have been highly optimized in order to acquire along-track stereo pairs and triplets, multi-targets and mosaics. The automatic orthomosaic product is the most ambitious innovation of the PHR ground image processing. Starting from an overview of the system characteristics enabling acquisition suitable for mosaic, this paper presents the geometric, radiometric and topological issues of the automatic ortho-mosaic and then focuses on the processing flow. It details the different steps: strategy, bundle adjustment, DEM refining, radiometric adjustment, seam line computation, a helped and quick image quality check and finally mosaic rectification. The process capabilities are illustrated with different sensor images. And finally the ortho-mosaic product content is described. Copyright SFPT Numéro de notice : A2006-639 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/T02-09.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28362 [article]

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Documents numériques

en open access The Pleiades-HR mosaic... - pdf editeur ISPRS Adobe Acrobat PDF

Evaluation of the horizontal resolution of SRTM elevation data / L. Pierce in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 11 (November 2006)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 72 n° 11 (November 2006) . - pp 1235 - 1244 Titre : Evaluation of the horizontal resolution of SRTM elevation data Type de document : Article/Communication Auteurs : L. Pierce, Auteur ; J. Kelindorf, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 1235 - 1244 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale [Termes IGN] lever topographique [Termes IGN] limite de résolution géométrique [Termes IGN] MNS SRTM [Termes IGN] modèle numérique de surface [Termes IGN] précision géométrique (imagerie) [Termes IGN] qualité géométrique (image) [Termes IGN] raisonnement inductif Résumé : (Auteur) The SRTM dataset is available at the USGS seamless website with one arc-second pixel spacing for the U.S. Recently, the value for horizontal resolution has been questioned. One paper (Smith and Sandwell, 2003) suggests that 60 meters may be more accurate, implying that the resolution is twice the provided spacing. For users of this data, the horizontal resolution is very important for their analyses. Hence, this paper addresses this important question by using two different approaches: coherence spectra and step-response. The coherence spectra approach uses statistical techniques to compare the SRTM dataset against a more accurate one, while the step response approach uses the observed step response in many areas of the dataset to estimate the width of the averaging function used to produce the SRTM data. Results from this study show that the resolution is between 1 and 1.6 pixels, depending on the local variability of the elevation data; with higher resolution near sharp edges and corners, and lower resolution in smoother areas. Copyright ASPRS Numéro de notice : A2006-492 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.72.11.1235 En ligne : https://doi.org/10.14358/PERS.72.11.1235 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28216 [article]

Resolution dependent errors in remote sensing of cultivated areas / M. Ozdogan in Remote sensing of environment, vol 103 n° 2 (30/07/2006)  

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Scale sets image analysis / Laurent Guigues in International journal of computer vision, vol 68 n°3 (July 2006)  

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Angular resolution of terrestrial laser scanners / Derek D. Lichti in Photogrammetric record, vol 21 n° 114 (June - August 2006)  

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Co-registration and inter-sensor comparison of MODIS and LANDSAT 7 ETM+ data aimed at NDVI calculation / P. Boccardo in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)  

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Interrelationships between spatial resolution and per-pixel classifiers for extracting information classes part 1: the urban environment / J.R. Jensen (29/03/2006)

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Interrelationships between spatial resolution and per-pixel classifiers for extracting information classes part 2: the natural environment / M.E. Hodgson (29/03/2006)

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Etude de différents facteurs influant les classifications d'images multi-résolution / F. Kazemipour (2006)

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ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, 2. Tome 2 / Alain Baudoin (2006)  

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ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, vol 1. Proceedings / Alain Baudoin (2006)  

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ASTER geometric performance / A. Iwasaki in IEEE Transactions on geoscience and remote sensing, vol 43 n° 12 (December 2005)  

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