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Auteur A. Rietdorf |
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Automatisierte Auswertung und Kalibrierung von scannenden Messsystemen mit tachymetrischem Messprinzip / A. Rietdorf (2005)
Titre : Automatisierte Auswertung und Kalibrierung von scannenden Messsystemen mit tachymetrischem Messprinzip Titre original : [Exploitation et étalonnage automatisés de systèmes de mesure à balayage avec un principe de mesure tachéométrique] Type de document : Thèse/HDR Auteurs : A. Rietdorf, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2005 Collection : DGK - C Sous-collection : Dissertationen num. 582 Importance : 103 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5021-1 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre
[Termes IGN] automatisation
[Termes IGN] erreur systématique
[Termes IGN] étalonnage d'instrument
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] semis de points
[Termes IGN] télémètre laser terrestre
[Termes IGN] télémétrie laser terrestre
[Termes IGN] transformationIndex. décimale : 33.70 Photogrammétrie terrestre Résumé : (Auteur) [...] Unlike conventional photo techniques, the scanning measuring systems based on polar measuring principles introduced to geodetic surveying practice within the past few years are suitable for the very fast measurement of individual objects, structures and whole buildings. The objects to be measured must not be accessible for the few minutes of continuous data acquisition, as they should be in the case of photogrammetric recording techniques. The scanning instruments are able, however, to ensure data acquisition rates of over 1000 discrete points per second.
In addition to the introduction to the technology of scanning polar measuring systems, this work deals with the development of suitable algorithms for the acceleration of the measurement and evaluation process. In the context of the calibration of scanning polar measuring systems with tachymetric measuring principles, special aspects are considered in the sub-field of structured geometry data acquisition, and the difficulties in combining sets of data from individual instrument points of view.
The combination of the readings from different instrument points of view in a standard primary system can be seen as a time-consuming factor in the evaluation of data from scanning measuring systems. Through the use of the procedure described in this work a reduction of the required evaluation time can be reached. By an automated extraction of iso-levels from the point clouds and a subsequent automatic assignment of the identities using projective transformations, the resulting iso-levels can be inspected with respect to the linked systern instrument points of view. The additional marking and subsequent measurement of reference points can therefore be avoided.
The development of an appropriate calibration method for scanning polar measuring systems based on tachymetric measuring principles is a second central point of this work. Special attention is given in this work to the regulation of systematic deviations and the precision details of the various integrated sensors. A system calibration method based on an extension of existing calibration procedures is proposed. Building on the point connection algorithms, a calibration method is introduced. This uses iso-levels and the help of the adjustment algorithm to estimate calibration parameters, as well as the precision of the measuring instruments. In conclusion, the efficiency and bounds of the calibration approach are examined and evaluated using measurements from two different laser scanners.Numéro de notice : 13269 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54949 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 13269-01 33.70 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible 13269-02 33.70 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible