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Auteur Q. Dalmolin |
Documents disponibles écrits par cet auteur (2)
Ajouter le résultat dans votre panier Affiner la recherche Interroger des sources externesPhotogrammetric control points from airborne laser scanner data / Q. Dalmolin in Revue Française de Photogrammétrie et de Télédétection, n° 198 - 199 (Septembre 2012)
Titre : Photogrammetric control points from airborne laser scanner data Type de document : Article/Communication Auteurs : Q. Dalmolin, Auteur ; J.A. Fierro Sanhueza, Auteur ; E. Aparecido Mitishita, Auteur ; D. Rodrigues Dos Santos, Auteur Année de publication : 2012 Article en page(s) : pp 39 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] aérotriangulation numérique
[Termes IGN] compensation par faisceaux
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] extraction semi-automatique
[Termes IGN] image aérienne à axe vertical
[Termes IGN] lasergrammétrie
[Termes IGN] point d'appui
[Termes IGN] point de vérification
[Termes IGN] toit
[Termes IGN] triangulation de DelaunayRésumé : (Auteur) This paper offers a methodology for the semi-automatic extraction of control points for phototriangulation by using laser intensity images. The control points are determined by the intersection of three or more plane features which make up the roof of houses or building or constructions in general. The features under study are selected visually in aerial photos of constructions in which there are three or more sloped roofs presenting concurrent plane features. These constructions are identified in laser intensity image, and the plane features which define their roofs are extracted and individually adjusted from a group of points which result from the survey undertaken with airborne laser scanner. Control points are determined through the intersection of roof planes of each construction previously adjusted. By using this technique, it is possible to use the points obtained from plane feature intersection in a computational routine, thus replacing the ones obtained in the field. The airborne points were processed in a semi-automated way to rebuild the plane features of building roofs. Thus, they were identified in laser intensity image and extracted from Delaunay's triangulation. Finally, the analysis of normal vectors of the generated triangulation is realized. The methodology was tested by phototriangulation with bundle adjustment and supported by the points obtained from laser scanner and by checking points the ones pre-signalized and which where obtained from the field with GPS help. A photogrammetric block formed by six aerial photos obtained by non-metric digital camera was used for tests. The results were analysed and compared, and the methodology used was recommended. Numéro de notice : A2012-422 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.52638/rfpt.2012.70 Date de publication en ligne : 21/04/2014 En ligne : https://doi.org/10.52638/rfpt.2012.70 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31868
in Revue Française de Photogrammétrie et de Télédétection > n° 198 - 199 (Septembre 2012) . - pp 39 - 45[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 012-201203 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : A semi-automatic method for indirect orientation of aerial images using ground control lines extracted from airborne laser scanner data Type de document : Article/Communication Auteurs : D. Rodrigues Dos Santos, Auteur ; Antonio Maria Garcia Tommaselli, Auteur ; Q. Dalmolin, Auteur ; E. Aparecido Mitishita, Auteur Année de publication : 2012 Article en page(s) : pp 53 - 61 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] appariement de lignes
[Termes IGN] coplanarité
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] filtre de Kalman
[Termes IGN] image aérienne
[Termes IGN] itération
[Termes IGN] orientation externeRésumé : (Auteur) This paper presents a method for indirect orientation of aerial images using ground control lines extracted from airborne Laser system (ALS) data. This data integration strategy has shown good potential in the automation of photogrammetric tasks, including the indirect orientation of images. The most important characteristic of the proposed approach is that the exterior orientation parameters (EOP) of a single or multiple images can be automatically computed with a space resection procedure from data derived from different sensors. The suggested method works as follows. Firstly, the straight lines are automatically extracted in the digital aerial image (s) and in the intensity image derived from an ALS data-set (S). Then, correspondence between s and S is automatically determined. A line-based coplanarity model that establishes the relationship between straight lines in the object and in the image space is used to estimate the EOP with the iterated extended Kalman filtering (IEKF). Implementation and testing of the method have employed data from different sensors. Experiments were conducted to assess the proposed method and the results obtained showed that the estimation of the EOP is function of ALS positional accuracy. Numéro de notice : A2012-424 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.52638/rfpt.2012.72 Date de publication en ligne : 21/04/2014 En ligne : https://doi.org/10.52638/rfpt.2012.72 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31870
in Revue Française de Photogrammétrie et de Télédétection > n° 198 - 199 (Septembre 2012) . - pp 53 - 61[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 012-201203 RAB Revue Centre de documentation En réserve L003 Disponible
