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The ADS40 Vaihingen/Enz geometric performance test / Michael Cramer in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 6 (September 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 6 (September 2006) . - pp 363 - 374 Titre : The ADS40 Vaihingen/Enz geometric performance test Type de document : Article/Communication Auteurs : Michael Cramer, Auteur Année de publication : 2006 Article en page(s) : pp 363 - 374 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] ADS40 [Termes IGN] caméra numérique [Termes IGN] image aérienne [Termes IGN] instrumentation Leica [Termes IGN] précision géométrique (imagerie) [Termes IGN] test de performance Résumé : (Auteur) This paper presents the main results of a comprehensive ADS40 performance analysis conducted at the Vaihingen/Enz test field. As such it represents one example of an independent in-flight performance study for one of the new and commercially operational digital airborne camera systems. Based on a large number of well coordinated and defined object points, which served as independent check points, the absolute geometric accuracy of the ADS40 from true operational data has been verified. Empirical analysis of data from flying heights ranging from 1500 m to 4000 m proved the ADS40 geometric accuracy to be in the range of 1–2 um at image scale for horizontal coordinates and 0.03–0.05 of the flying height for vertical components. This is fully within specification for airborne imaging. Numéro de notice : A2006-409 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.05.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.05.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28133 [article]

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Studies on DMC geometry / R. Alamus in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 6 (September 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 6 (September 2006) . - pp 375 - 386 Titre : Studies on DMC geometry Type de document : Article/Communication Auteurs : R. Alamus, Auteur ; W. Kornus, Auteur ; J. Talaya, Auteur Année de publication : 2006 Article en page(s) : pp 375 - 386 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse comparative [Termes IGN] chambre DTC [Termes IGN] DMC [Termes IGN] données lidar [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] modèle numérique de surface [Termes IGN] photogrammétrie aérienne [Termes IGN] précision géométrique (imagerie) Résumé : (Auteur) Since the ISPRS Congress 2000 in Amsterdam, there are great expectations in matrix-CCD based digital cameras for aerial photogrammetry and mapping applications. During the last two years the number of DMC cameras in the market has raised significantly (32 cameras were sold until March 2006). This paper discusses the DMC accuracy focusing on the role of self-calibration parameters and the assessment of automatic DEM quality. This investigation concluded that under the current status of DMC an appropriate set of self-calibration parameters is necessary in order to achieve theoretical accuracy and precision, which were discussed in early literature. In the following discussions, the accuracy of the DMC is analyzed comparing its performance in automatic DEM generation to that of an analog camera using a Lidar DEM as reference. Despite the fact that the higher image quality of the DMC should overcome the poorer base-to-height ratio, the presented results did not reach the expected accuracies. However, our current study is not yet conclusive on this topic because the DMC, the analog images and the LIDAR data have not been acquired at the same time. Numéro de notice : A2006-410 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.05.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.05.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28134 [article]

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Geometric test field calibration of digital photogrammetric sensors / Eija Honkavaara in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 6 (September 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 6 (September 2006) . - pp 387 - 399 Titre : Geometric test field calibration of digital photogrammetric sensors Type de document : Article/Communication Auteurs : Eija Honkavaara, Auteur ; E. Ahokas, Auteur ; Juha Hyyppä, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 387 - 399 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse comparative [Termes IGN] caméra numérique [Termes IGN] erreur systématique [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] étalonnage géométrique [Termes IGN] photogrammétrie numérique [Termes IGN] précision géométrique (imagerie) Résumé : (Auteur) Test field system calibration will be a fundamental part of the future photogrammetric production line. Accurate calibration and performance evaluations are necessary for fully assessing the stability and accuracy of digital sensing techniques. In this paper, a method of comprehensive geometric calibration in a test field has been developed and empirically tested using eight image blocks collected with three UltraCamD digital large format photogrammetric cameras. Permanent photogrammetric test fields form the basis of the method. Important components of the method are determination of system parameters, evaluation of systematic errors, and assessment of geometric accuracy. The results showed that UltraCamD images contained systematic deformations that could not be modeled with single lens additional parameter models. Good point determination accuracy was obtained despite the systematic errors ; the typical accuracy was 2–3 um in image space in the horizontal coordinates and 0.05–0.09 of the object distance in height. One of the cameras had significantly poorer performance. In the worst cases, the horizontal accuracy was 5 um in image space and the height accuracy was 0.18 of the object distance. The analog cameras gave better results than the UltraCamD, but the development of appropriate mathematical models for UltraCamD as well as improvements in digital sensors may change the situation in the near future. Numéro de notice : A2006-411 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.04.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.04.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28135 [article]

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High-end aerial digital cameras and their impact on the automation and quality of the production workflow / Nicolas Paparoditis in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 6 (September 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 6 (September 2006) . - pp 400 - 412 Titre : High-end aerial digital cameras and their impact on the automation and quality of the production workflow Type de document : Article/Communication Auteurs : Nicolas Paparoditis , Auteur ; Jean-Philippe Souchon , Auteur ; Gilles Martinoty , Auteur ; Marc Pierrot-Deseilligny , Auteur Année de publication : 2006 Article en page(s) : pp 400 - 412 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur aérien [Termes IGN] chambre DTC [Termes IGN] délai [Termes IGN] étalonnage radiométrique [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] Institut géographique national (France) [Termes IGN] orthoimage Résumé : (Auteur) The IGN digital camera project was established in the early 1990s. The first research surveys were carried out in 1996 and the digital camera was first used in production in 2000. In 2004 approximately 10 French departments (accounting for 10% of the territory) were covered with a four-head camera system and since summer 2005 all IGN imagery has been acquired digitally. Nevertheless the camera system is still evolving, with tests on new geometric configurations being continuously undertaken. The progressive integration of the system in IGN production workflows has allowed IGN to keep the system evolving in accordance with production needs. Remaining problems are due to specific camera characteristics such as CCD format, the optical quality of off-the-shelf lenses, and because some production tools are ill-adapted to digital images with a large dynamic range. However, when considering the pros and cons of integrating these images into production lines, the disadvantages are largely balanced by the numerous benefits this technology offers. Numéro de notice : A2006-412 Affiliation des auteurs : LOEMI (1985-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.06.003 Date de publication en ligne : 10/08/2006 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.06.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28136 [article]

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Towards 3D map generation from digital aerial images / L. Zebelin in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 6 (September 2006)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 60 n° 6 (September 2006) . - pp 413 - 427 Titre : Towards 3D map generation from digital aerial images Type de document : Article/Communication Auteurs : L. Zebelin, Auteur ; A. Klaus, Auteur ; B. Gruber-Geymayer, Auteur ; K. Karner, Auteur Année de publication : 2006 Article en page(s) : pp 413 - 427 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] aérotriangulation [Termes IGN] appariement d'images [Termes IGN] classification spectrale [Termes IGN] image à basse résolution [Termes IGN] image à haute résolution [Termes IGN] image aérienne [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] image RVB [Termes IGN] modèle numérique de surface [Termes IGN] orthoimage intégrale [Termes IGN] reconstruction 3D Résumé : (Auteur) This paper describes the fusion of information extracted from multispectral digital aerial images for highly automatic 3D map generation. The proposed approach integrates spectral classification and 3D reconstruction techniques. The multispectral digital aerial images consist of a high resolution panchromatic channel as well as lower resolution RGB and near infrared (NIR) channels and form the basis for information extraction. Our land use classification is a 2-step approach that uses RGB and NIR images for an initial classification and the panchromatic images as well as a digital surface model (DSM) for a refined classification. The DSM is generated from the high resolution panchromatic images of a specific photo mission. Based on the aerial triangulation using area and feature-based points of interest the algorithms are able to generate a dense DSM by a dense image matching procedure. Afterwards a true ortho image for classification, panchromatic or color input images can be computed. In a last step, specific layers for buildings and vegetation are generated and the classification is updated. Numéro de notice : A2006-413 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.06.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.06.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28137 [article]

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