Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Aerial video georegistration using terrain models from dense and coherent stereo matching
Year:2014
Research Areas
  • Electronic technology and of the communications
Information
Abstract
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sensor, high resolution referenced images or terrain elevation models, which are usually not publicly available or out of date.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.
International
Si
Congress
SPIE Int. Conf. Motion Imagery for ISR and Situational Awareness
960
Place
Baltimore (MA), USA
Reviewers
Si
ISBN/ISSN
0277-786X
10.1117/12.2053034
Start Date
05/05/2014
End Date
09/05/2014
From page
1
To page
10
SPIE Int. Conf. Motion Imagery for ISR and Situational Awareness
Participants
  • Autor: Susana Ruano Sainz (UPM)
  • Autor: Guillermo Gallego Bonet (UPM)
  • Autor: Carlos Cuevas Rodriguez (UPM)
  • Autor: Narciso Garcia Santos (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Tratamiento de Imágenes (GTI)
  • Departamento: Señales, Sistemas y Radiocomunicaciones
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