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Memorias de investigación
Ponencias en congresos:
Aerial video georegistration using terrain models from dense and coherent stereo matching
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
In the context of aerial imagery, one of the fi?rst steps toward a coherent processing of the information contained in multiple images is geo-registration, which consists in assigning geographic 3D coordinates to the pixels of the image. This enables accurate alignment and geo-positioning of multiple images, detection of moving objects and fusion of data acquired from multiple sensors. To solve this problem there are di?erent approaches that require, in addition to a precise characterization of the camera sensor, high resolution referenced images or terrain elevation models, which are usually not publicly available or out of date. Building upon the idea of developing technology that does not need a reference terrain elevation model, we propose a geo-registration technique that applies variational methods to obtain a dense and coherent surface elevation model that is used to replace the reference model. The surface elevation model is built by interpolation of scattered 3D points, which are obtained in a two-step process following a classical stereo pipeline: ?firrst, coherent disparity maps between image pairs of a video sequence are estimated and then image point correspondences are back-projected. The proposed variational method enforces continuity of the disparity map not only along epipolar lines (as done by previous geo-registration techniques) but also across them, in the full 2D image domain. In the experiments, aerial images from synthetic video sequences have been used to validate the proposed technique.
Nombre congreso
SPIE Int. Conf. Motion Imagery for ISR and Situational Awareness
Tipo de participación
Lugar del congreso
Baltimore (MA), USA
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Título de las actas
SPIE Int. Conf. Motion Imagery for ISR and Situational Awareness
Esta actividad pertenece a memorias de investigación
  • Autor: Susana Ruano Sainz (UPM)
  • Autor: Guillermo Gallego Bonet (UPM)
  • Autor: Carlos Cuevas Rodriguez (UPM)
  • Autor: Narciso Garcia Santos (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Tratamiento de Imágenes (GTI)
  • Departamento: Señales, Sistemas y Radiocomunicaciones
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