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Direct sensor orientation for large scale mapping: potential, problems, solutions / N. Yastikli in Photogrammetric record, vol 20 n° 111 (September - November 2005)  

Public [article]  inPhotogrammetric record > vol 20 n° 111 (September - November 2005) . - pp 274 - 284 Titre : Direct sensor orientation for large scale mapping: potential, problems, solutions Type de document : Article/Communication Auteurs : N. Yastikli, Auteur ; Karsten Jacobsen, Auteur Année de publication : 2005 Article en page(s) : pp 274 - 284 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] capteur aérien [Termes IGN] élément d'orientation externe [Termes IGN] géoréférencement direct [Termes IGN] GPS-INS [Termes IGN] Lidar [Termes IGN] orientation du capteur [Termes IGN] orientation externe [Termes IGN] positionnement par GPS [Termes IGN] radar à antenne synthétique Résumé : (Auteur) Georeferencing is one of the most important tasks in photogrammetry. Traditionally it has been achieved indirectly using the well-known method of aerial triangulation. With the availability of integrated GPS and inertial measurement units (IMU), this situation changed. Direct determination of exterior orientation is now possible. Today, direct and integrated sensor orientation is used for a wide range of sensors including lidar and SAR, as well as for digital line scanner systems and aerial cameras. This paper investigates the performance of direct and integrated sensor orientation for large scale mapping using the data-set of the "Integrated Sensor Orientation" test of the European Organisation for Experimental Photogrammetric Research (OEEPE-now known as EuroSDR). The concept, potential, problems and solutions of direct and integrated sensor orientation are discussed. Numéro de notice : A2005-380 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2005.00318.x En ligne : https://doi.org/10.1111/j.1477-9730.2005.00318.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27516 [article]

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Influence of system calibration on direct sensor orientation / N. Yastikli in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 5 (May 2005)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 5 (May 2005) . - pp 629 - 633 Titre : Influence of system calibration on direct sensor orientation Type de document : Article/Communication Auteurs : N. Yastikli, Auteur ; Karsten Jacobsen, Auteur Année de publication : 2005 Article en page(s) : pp 629 - 633 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] antenne GPS [Termes IGN] erreur aléatoire [Termes IGN] erreur systématique [Termes IGN] étalonnage d'instrument [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] GPS-INS [Termes IGN] ligne de visée [Termes IGN] modèle mathématique [Termes IGN] orientation du capteur [Termes IGN] orientation interne [Termes IGN] positionnement par GPS [Termes IGN] système de coordonnées Résumé : (Auteur) The determination of object coordinates based on direct sensor orientation is an extrapolation from the projection centers to the ground coordinate system. Like any extrapolation, it is sensitive to random and systematic errors, as well as, to improper data handling. Direct sensor orientation is based on the combination of an Inertial Measurement System (IMU) and GPS. The GPS antenna, the IMU, and the imaging sensor are located in different positions, and the latter two have different orientations. Therefore, the calibration of all sensors and the relation between the sensors is of vital importance for precise ground positioning. The system calibration includes the determination of the boresight misalignment, the interior camera orientation, and the GPS antenna offset. A rigorous mathematical model is required. The inner orientation of the camera used has to be determined under flight conditions to achieve sufficient results. In this paper, the influence of the system calibration to the direct sensor orientation and improper data handling will be shown. Numéro de notice : A2005-183 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.5.629 En ligne : http://dx.doi.org/10.14358/PERS.71.5.629 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27320 [article]