Descripteur
Termes IGN > mesurage de distances > télémétrie > télémétrie laser
télémétrie laserSynonyme(s)Télémétrie par laserVoir aussi |
Documents disponibles dans cette catégorie (516)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Effects of laser beam alignment tolerance on lidar accuracy / D. Latypov in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 6 (November 2005)
[article]
Titre : Effects of laser beam alignment tolerance on lidar accuracy Type de document : Article/Communication Auteurs : D. Latypov, Auteur Année de publication : 2005 Article en page(s) : pp 361 - 368 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] données lidar
[Termes IGN] erreur systématique
[Termes IGN] étalonnage géométrique
[Termes IGN] faisceau
[Termes IGN] Lidar
[Termes IGN] orientation du capteur
[Termes IGN] plan de vol
[Termes IGN] point d'appui
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) One of the major lidar error sources not yet analysed in the literature is the tolerance of the laser beam alignment with respect to the scanning mirror. In this paper, the problem of quantifying these errors is solved for rotating polygon mirror type lidar systems. An arbitrary deviation of the beam from its design direction -the vector of beam misalignment- can be described by two independent parameters. We choose these as horizontal and vertical components of the misalignment vector in the body frame. Either component affects both, horizontal and vertical lidar accuracy. Horizontal lidar errors appear as scan line distortions-along and across track shifts, rotations and scaling. It is shown that the horizontal component of misalignment results in a scan line first being shifted across the track and then rotated around the vertical at the new center of the scan line. Resulting vertical lidar error, being a linear function of the scan angle, is similar to that produced by a roll bias. The vertical component of the beam misalignment causes scan line scaling and an along track shift. The corresponding vertical error is quadratic with respect to the scan angle. The magnitude of these effects is significant even at tight alignment tolerances and cannot be realistically accounted for in the conventional calibration model, which includes only range, attitude and GPS biases. Therefore, in order to attain better accuracy, this model must be expanded to include the beam misalignment parameters as well. Addition of new parameters into the model raises a question of whether they can be reliably solved for. To give a positive answer to this question, a calibration method must utilize not only ground control information, which is typically very limited, but also the relative accuracy information from the overlapping flight lines. Copyright ISPRS Numéro de notice : A2005-491 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2005.09.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2005.09.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27627
in ISPRS Journal of photogrammetry and remote sensing > vol 59 n° 6 (November 2005) . - pp 361 - 368[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-05041 SL Revue Centre de documentation Revues en salle Disponible How to make maps in the 21st century: laser scan's approach / R. Wevers in Geoinformatics, vol 8 n° 7 (01/10/2005)
[article]
Titre : How to make maps in the 21st century: laser scan's approach Type de document : Article/Communication Auteurs : R. Wevers, Auteur Année de publication : 2005 Article en page(s) : pp 36 - 39 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] balayage laser
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] Laser-Scan
[Termes IGN] mise à jour cartographique
[Termes IGN] modèle cartographique
[Termes IGN] prise en compte du contexteRésumé : (Auteur) Recently Laser-Scan has been involved in a major generalisation project to improve business efficiencies at several state mapping agencies in Germany. What is the current status of generalisation ? How much can be done automated ? How emcompassing are the algorithms nowadays ? Dieter Neuffer, generalisation Product Manager from Laser-Scan, gives the answers. Numéro de notice : A2005-449 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27585
in Geoinformatics > vol 8 n° 7 (01/10/2005) . - pp 36 - 39[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 262-05071 SL Revue Centre de documentation Revues en salle Disponible Spectral filtering and classification of terrestrial laser scanner point clouds / Derek D. Lichti in Photogrammetric record, vol 20 n° 111 (September - November 2005)
[article]
Titre : Spectral filtering and classification of terrestrial laser scanner point clouds Type de document : Article/Communication Auteurs : Derek D. Lichti, Auteur Année de publication : 2005 Article en page(s) : pp 218 - 240 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] classificateur paramétrique
[Termes IGN] classification dirigée
[Termes IGN] coefficient de corrélation
[Termes IGN] correction radiométrique
[Termes IGN] filtrage numérique d'image
[Termes IGN] image multibande
[Termes IGN] précision de la classification
[Termes IGN] semis de points
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) A method is presented for filtering and classification of terrestrial laser scanner point clouds. The algorithm exploits the four-channel (blue, green, red and near infrared) multispectral imaging capability of some terrestrial scanners using supervised, parametric classification to assign thematic class labels to all scan cloud points. Its principal advantage is that it is a completely data-driven algorithm and is independent of spatial sampling resolution since the processing is performed in four-dimensional spectral feature space. Its application to two data-sets of different spatial extent and spatial and spectral complexity is reported, for which respective overall classification accuracies of 87.0% and 82.0% were achieved. Analysis of the input data with emphasis on the characteristics pertinent to the anticipated outcomes precedes detailed analysis of the classification results and error sources and their causes. Erroneously classified points are attributed to radiometric errors stemming from both detector hardware and physical effects. Numéro de notice : A2005-378 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2005.00321.x En ligne : https://doi.org/10.1111/j.1477-9730.2005.00321.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27514
in Photogrammetric record > vol 20 n° 111 (September - November 2005) . - pp 218 - 240[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 106-05031 RAB Revue Centre de documentation En réserve L003 Disponible Terrestrial laser scanning : applications in cultural heritage conservation and civil engineering / T. Abmayr (01/08/2005)
Titre : Terrestrial laser scanning : applications in cultural heritage conservation and civil engineering Type de document : Article/Communication Auteurs : T. Abmayr, Auteur ; Fabian Härtl, Auteur ; M. Reinköster, Auteur ; C. Fröhlich, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 01/08/2005 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36-5/W17 Conférence : 3D-ARCH 2005, ISPRS WG V-4 Workshop, Virtual reconstruction and visualisation of complex architecture 22/08/2005 24/08/2005 Venise Italie OA Proceedings Importance : 6 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] génie civil
[Termes IGN] patrimoine culturel
[Termes IGN] télémètre laser terrestre
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) Laser scanners are used more and more as instruments for various tasks in cultural heritage conservation. Especially old buildings and archaeological sites are relevant to offer a variety of applications e.g. the surveying of static or simply the visualization and precise modelling for data archiving purposes. The developed IMAGER 5003 is a state-of-the-art, high precision, high speed laser scanner, which provides accurate measurements. The IMAGER 5003 measures range and intensity images at the same time, with a one to one correspondence between these both images with respect to the angles: The range image generates geometric dimensions of the environmental scenes, whereas the reflectance image generates a photographic like impression of the scanned environment which is used for feature extraction, visual inspection, object segmentation, and surface classification. For visualisation tasks the scan data can be combined with colour information: For this purpose either a special high resolution line scan camera developed by the German Aerospace or a standard digital array camera can be used. This paper introduces from a practical point of view into visualization and modelling techniques by using the laser scanner IMAGER 5003. The paper describes features and methods of the system, and shows up two applications in the field of cultural heritage conservation and civil engineering. Numéro de notice : C2005-012 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : http://www.isprs.org/proceedings/XXXVI/5-W17/pdf/19.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64232 Documents numériques
en open access
Terrestrial_laser_scanning_in_cultural_heritage_abmayr.pdfAdobe Acrobat PDF Lidar on the level in Afghanistan: GPS, inertial map the Kabul road / S. Newby in GPS world, vol 16 n° 7 (July 2005)
[article]
Titre : Lidar on the level in Afghanistan: GPS, inertial map the Kabul road Type de document : Article/Communication Auteurs : S. Newby, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 16 - 22 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie moderne
[Termes IGN] Afghanistan
[Termes IGN] caméra vidéo
[Termes IGN] données lidar
[Termes IGN] GPS-INS
[Termes IGN] Lidar
[Termes IGN] route
[Termes IGN] télémètre laser terrestre
[Termes IGN] télémétrie laser terrestre
[Termes IGN] véhicule automobileRésumé : (Auteur) Concerns about airspace security in Afghanistan literally brought a LiDAR-based survey operation down to the ground. Fashioning a truck-back system, Canadian engineers used GPS and inertial measurement to time and locate the laser-ranging "hits" that would construct a digital elevation model of the badly damaged highway. The return to an earlier prototype now affords a quick, cost-effective solution for other survey situations. Copyright Questex Media Group Inc Numéro de notice : A2005-584 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27719
in GPS world > vol 16 n° 7 (July 2005) . - pp 16 - 22[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-05071 SL Revue Centre de documentation Revues en salle Disponible Combined digital photogrammetry and time-of-flight laser scanning for monitoring cliff evolution / M. Lim in Photogrammetric record, vol 20 n° 110 (June - August 2005)PermalinkMise à jour de MNT intégré terre - mer et application au prisme megatidal du Mont Saint-michel (France) / F. Kaveh in Revue Française de Photogrammétrie et de Télédétection, n° 177 (Juin 2005)PermalinkA multi-sensor technology for transmission line surveys: Lidar and medium-format digital imaging / F. Artes in Geoinformatics, vol 8 n° 4 (01/06/2005)PermalinkLeast squares 3D surface and curve matching / Armin W. Gruen in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 3 (May 2005)PermalinkGéo évènement 2005 / Anonyme in Géomatique expert, n° 43 (01/04/2005)PermalinkUpdating a digital geographic database using Vehicle-borne Laser scanners and line cameras / H. Zhao in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 4 (April 2005)PermalinkLe relevé par scannage 3D du temple d'Opet à Karnak, Egypte / B. Chazaly in XYZ, n° 102 (mars - mai 2005)PermalinkAutomatisierte Auswertung und Kalibrierung von scannenden Messsystemen mit tachymetrischem Messprinzip / A. Rietdorf (2005)PermalinkBuilding information system: a system based on terrestrial laser scanning / Luigi Colombo in GIM international, vol 19 n° 1 (January 2005)PermalinkImagerie virtuelle, la nouvelle dimension : un vrai "plus" pour présenter son projet / M. Ravalet in Géomètre, n° 2011 (janvier 2005)Permalink