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GNSS-assisted integrated sensor orientation with sensor pre-calibration for accurate corridor mapping / Yilin Zhou in Sensors, vol 18 n° 9 (September 2018)
Titre : GNSS-assisted integrated sensor orientation with sensor pre-calibration for accurate corridor mapping Type de document : Article/Communication Auteurs : Yilin Zhou Année de publication : 2018 Projets : 1-Pas de projet / Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] chambre métrique
[Termes IGN] compensation par faisceaux
[Termes IGN] drone
[Termes IGN] modèle géométrique de prise de vue
[Termes IGN] orientation du capteur intégrée
[Termes IGN] point d'appui
[Termes IGN] récepteur GNSS
[Termes IGN] zone tamponRésumé : (auteur) With the development of unmanned aerial vehicles (UAVs) and global navigation satellite system (GNSS), the accurate camera positions at exposure can be known and the GNSS-assisted bundle block adjustment (BBA) approach is possible for integrated sensor orientation (ISO). This study employed ISO approach for camera pose determination with the objective of investigating the impact of a good sensor pre-calibration on a poor acquisition geometry. Within the presented works, several flights were conducted on a dike by a small UAV embedded with a metric camera and a GNSS receiver. The multi-lever-arm estimation within the BBA procedure makes it possible to merge image blocks of different configurations such as nadir and oblique images without physical constraints on camera and GNSS antenna positions. The merged image block achieves a better accuracy and the sensor self-calibrated well. The issued sensor calibration is then applied to a less preferable acquisition configuration and the accuracy is significantly improved. For a corridor acquisition scene of about 600 m , a centimetric accuracy is reached with one GCP. With the provided sensor pre-calibration, an accuracy of 3.9 cm is achieved without any GCP. Numéro de notice : A2018-388 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/s18092783 Date de publication en ligne : 24/08/2018 En ligne : https://doi.org/10.3390/s18092783 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90803
in Sensors > vol 18 n° 9 (September 2018)[article]
Titre : Lightweight UAV with on-board photogrammetry and single-frequency GPS positioning for metrology applications Type de document : Article/Communication Auteurs : Mehdi Daakir Année de publication : 2017 Projets : 1-Pas de projet / Article en page(s) : pp 115 – 126 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] CamLight
[Termes IGN] chambre métrique
[Termes IGN] données GPS
[Termes IGN] drone
[Termes IGN] Institut national de l'information géographique et forestière (France)
[Termes IGN] métrologie
[Termes IGN] orientation du capteur intégrée
[Termes IGN] récepteur monofréquenceRésumé : (auteur) This article presents a coupled system consisting of a single-frequency GPS receiver and a light photogrammetric quality camera embedded in an Unmanned Aerial Vehicle (UAV). The aim is to produce high quality data that can be used in metrology applications. The issue of Integrated Sensor Orientation (ISO) of camera poses using only GPS measurements is presented and discussed. The accuracy reached by our system based on sensors developed at the French Mapping Agency (IGN) Opto-Electronics, Instrumentation and Metrology Laboratory (LOEMI) is qualified. These sensors are specially designed for close-range aerial image acquisition with a UAV. Lever-arm calibration and time synchronization are explained and performed to reach maximum accuracy. All processing steps are detailed from data acquisition to quality control of final products. We show that an accuracy of a few centimeters can be reached with this system which uses low-cost UAV and GPS module coupled with the IGN-LOEMI home-made camera. Numéro de notice : A2017-220 Affiliation des auteurs : LASTIG LOEMI+Ext (2012-2019) Autre URL associée : vers HAL Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2016.12.007 Date de publication en ligne : 16/02/2017 En ligne : https://doi.org/10.1016/j.isprsjprs.2016.12.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85098
in ISPRS Journal of photogrammetry and remote sensing > vol 127 (May 2017) . - pp 115 – 126[article]Exemplaires(3)
Code-barres Cote Support Localisation Section Disponibilité 081-2017051 RAB Revue Centre de documentation En réserve L003 Disponible 081-2017053 DEP-EXM Revue LASTIG Dépôt en unité Exclu du prêt 081-2017052 DEP-EAF Revue Nancy Dépôt en unité Exclu du prêt
Titre : Integrated sensor orientation on micro aerial vehicles Type de document : Thèse/HDR Auteurs : Martin Rehak, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2017 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 98 Importance : 210 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-44-4 Note générale : bibliographie
pour l'obtention du grade de docteur ès sciencesLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] compensation par faisceaux
[Termes IGN] couplage GNSS-INS
[Termes IGN] étalonnage d'instrument
[Termes IGN] modélisation géométrique de prise de vue
[Termes IGN] orientation du capteur intégrée
[Termes IGN] plan de volIndex. décimale : 35.10 Acquisition d'images Résumé : (auteur) Mapping with Micro Aerial Vehicles (MAVs whose weight does not exceed 5 kg) is gaining importance in applications, such as corridor mapping, road and pipeline inspections, or mapping of large areas with homogeneous surface structure, e.g. forest or agricultural fields. When cm-level accuracy is required, the classical approach of sensor orientation does not deliver satisfactory results unless a large number of ground control points (GCPs) is regularly distributed in the mapped area. This may not be a feasible method either due to the associated costs or terrain inaccessibility.
This thesis addresses such issues by presenting a development of MAV platforms with navigation and imaging sensors that are able to perform integrated sensor orientation (ISO). This method combines image measurements with GNSS or GNSS/IMU (Global Navigation Satellite System/Inertial Measurement Unit) observations. This innovative approach allows mapping with cm-level accuracy without the support of GCPs, even in geometrically challenging scenarios, such as corridors. The presented solution also helps in situations where automatic image observations cannot be generated, e.g. over water, sand, or other surfaces with low variations of texture.
The application of ISO to MAV photogrammetry is a novel solution and its implementation brings new engineering and research challenges due to a limited payload capacity and quality of employed sensors on-board. These challenges are addressed using traditional as well as novel methods of treating observations within the developed processing software. The capability of the constructed MAV platforms and processing tools is tested in real mapping scenarios. It is empirically confirmed that accurate aerial control combined with a state-of- the-art calibration and processing can deliver cm-level ground accuracy, even in the most demanding projects.
This thesis also presents an innovative way of mission planning in challenging environments. Indeed, a thorough pre-flight analysis is important not only for obtaining satisfactory map- ping quality, but photogrammetric missions must be carried out in compliance with state regulations.Note de contenu : 1- Introduction
2- UAV Photogrammetry
3- Mission Planning and Flight Management
4- Measurements, Models and Estimation Methods
5- Developed MAV Platforms and Sensor Equipment
6- System and Sensor Calibration
7- Evaluation and Performance Assessment
8- Conclusion and PerspectivesNuméro de notice : 17459 Affiliation des auteurs : non IGN Autre URL associée : URL EPFL Thématique : IMAGERIE Nature : Thèse étrangère Note de thèse : thèse : Sciences : EPFL : 2017 DOI : 10.5075/epfl-thesis-7530 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-98.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89684 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 17459-01 35.10 Livre Centre de documentation Télédétection Disponible
Titre : Improved wide-angle, fisheye and omnidirectional camera calibration Type de document : Article/Communication Auteurs : Steffen Urban, Auteur ; Jens Leitloff, Auteur ; Stefan Hinz, Auteur Année de publication : 2015 Article en page(s) : pp 72 – 79 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] objectif grand angulaire
[Termes IGN] orientation du capteur intégréeRésumé : (auteur) In this paper an improved method for calibrating wide-angle, fisheye and omnidirectional imaging systems is presented. We extend the calibration procedure proposed by Scaramuzza et al. by replacing the residual function and joint refinement of all parameters. In doing so, we achieve a more stable, robust and accurate calibration (up to factor 7) and can reduce the number of necessary calibration steps from five to three. After introducing the camera model and highlighting the differences from the current calibration procedure, we perform a comprehensive performance evaluation using several data sets and show the impact of the proposed calibration procedure on the calibration results. Numéro de notice : A2015-853 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.06.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2015.06.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79223
in ISPRS Journal of photogrammetry and remote sensing > vol 108 (October 2015) . - pp 72 – 79[article]
Titre : Fast AT: a simple procedure for quasi direct orientation Type de document : Article/Communication Auteurs : M. Blazquez, Auteur ; Ismael Colomina, Auteur Année de publication : 2012 Article en page(s) : pp 1 - 11 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] aérotriangulation numérique
[Termes IGN] étalonnage de chambre métrique
[Termes IGN] GPS-INS
[Termes IGN] modèle mathématique
[Termes IGN] orientation d'image
[Termes IGN] orientation du capteur
[Termes IGN] orientation du capteur intégréeRésumé : (Auteur) Over the past two decades, the development of Global Navigation Satellite System (GNSS) technology, inertial navigation technology and Inertial Navigation Systems (INS) and their application to sensor orientation in photogrammetry and remote sensing has led to more precise, accurate, reliable and cost efficient orientation and calibration methods and procedures. Today, most airborne photogrammetric and remote sensing systems are equipped with GNSS receivers and inertial sensors. To a large extent and more or less independently from the imaging geometry and sensor type, orientation is performed with the “direct” and “integrated” methods. In this paper we introduce a new orientation method that we call “Fast AT” for frame images. The new method combines image measurements, ground control and aerial control observations in novel quantitative and qualitative ways. Depending on project specifications, Fast AT can be a robust alternative to direct orientation and, at the very least, a fast quality control tool for any orientation task. We analyze the performance of Fast AT with analogue and digital frame imagery and draw conclusions on its general properties. Numéro de notice : A2012-344 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.04.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.04.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31790
in ISPRS Journal of photogrammetry and remote sensing > vol 71 (July 2012) . - pp 1 - 11[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2012051 SL Revue Centre de documentation Revues en salle Disponible 
PermalinkPermalinkReliability of direct georeferencing: An overview of the current approaches and possibilities / Jan Skaloud (2006)
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