GEODETIC PHOTOGRAMMETRY

Author: MIGUEL SANZ MUÑOZ PEDRO.
Year: 2003.
University: POLITÉCNICA DE MADRID [www.upm.es].
Place of defense: E.T.S. DE INGENIEROS AGRONOMOS.
Place of preparation: E.T.S. DE INGENIEROS AGRONOMOS.

Summary: The technology INS / GPSD emerges as an alternative to traditional techniques for guidance elcampo of analog cameras, but in the case of some digital sensors and optical sensors not like the LIDAR and SAR, which would be the only way of guidance. In the short or medium term, the development of this technique will reduce the field to support and expedite the process of triangulation Air. Since this would result in an economic savings at the stage of field support and aerotriangulación.Pero within tempo broader aims at eliminating these phases of the production process getting the gorreferencia sensor directly vuelo.Esto is what being denominando Aerocontrol or Georreferenciación directa.Gracias this new technical guidance can be achieved direct georeferencing of airborne sensors such as: lidar systems, Synthetic Aperture Radar (SAR) and cameras fotogramétricas digital, which is the direct georeferencing only route guidance.

Author: GONZALEZ AGUILERA DIEGO.
Year: 2004.
University: SALAMANCA [www.usal.es].
Place of defense: ESCUELA POLITECNICA SUPERIOR DE AVILA.
Place of preparation: ESCUELA POLITECNICA SUPERIOR DE AVILA.

Summary: From one view 2D, it is possible to extract substantial information about the original object and even reconstruct the model in perspective 3D. The most critical step in this process is identifying with a high degree of accuracy and reliability structural elements of one's own view. The lines and points of leakage are the most important structural elements, since they contain relevant information about the geometric dimensional scene and even the camera, which constitute an essential element of departure in the 3D reconstruction from a single view . The integration of the disciplines of Digital Photogrammetry and Computational Vision provides automation through hierarchical approaches (detection, segmentation and clustering), supported by robust techniques that ensure quality in determining basic primitives, which serve as the basis for calculating points of flight and to estimate the internal geometry of the camera (focal point and main parameters of radial distortion). However, to undertake a reconstruction of the 3D model from a single view, we need to determine the parameters outside of the camera, 'camera pose': axis orientation and position of making point of view, which requires information priori object in the form of restrictions on geometric points, lines or areas that would establish no ambigà ¼ old system of reference associated with the object. In a more level of the hierarchy, rectification of both core subject, allow an initial structural definition of its basic geometry, as well as the allocation of geometric constraints that serve as a basis for calculation of 3D model. Finally, the integration of Digital Photogrammetry and Computer Graphic allow the development of a hierarchical and topological structure inherited from the language VRML (Virtual Reality Modeling Language) for the representation and visualization and interactive 3D model of the scene. The framework of this thesis focuses on the reconstruction of 3D models from a single view. The context for the application of these methods, Photogrammetry Architectural buildings unique to a particular property interest, we will impose restrictions on its applicability geometric special and this is reflected in the different algorithms developed in the thesis. Indeed, the structure of objects that only about basic elements of geometry, especially points, lines and planes, which are part of a simplification of entry of the object in the form of geometric constraints. However, the range of application of the proposed methods is not restricted solely to outdoor scenes may extrapolated to other disciplines beyond the Close Range Photogrammetry.