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Title: Video sequence calibration and applications
Authors: Álvarez León, Luis Miguel 
Cuenca Hernández, Carmelo 
Salgado de la Nuez, Agustín Javier 
Sánchez, Javier 
UNESCO Clasification: 220990 Tratamiento digital. Imágenes
120601 Construcción de algoritmos
120602 Ecuaciones diferenciales
120326 Simulación
Issue Date: 2003
Abstract: In this paper we propose a new technique to calibrate a video sequence. We will compute the location and rotation of the camera for each frame of the video sequence. Classical methods for camera calibration work properly in the case of a small number of cameras. When we take an image sequence with a video rate, the number of frames is very large and classical methods do not work properly. To avoid this drawback, we focus the calibration process in the estimation of the coordinates of a set of 3D points in the scene, so the unknown are these 3D point coordinates rather than the projection matrix associated to each frame. The advantage of this approach is that with a few number of 3D point coordinates we can estimate the projection matrix of any frame using the relation between the 3D points and its projection on each frame. In order to compute such set of 3D points, we will use a classical camera calibration technique applied on a small subsequence of frames taken from the large original video sequence. We also perform an iterative procedure to include the information of all the cameras in the calibration computation. To illustrate the capabilities of the proposed method, we will apply this technique to include virtual 3D objects in a real video sequence.
Source: Proceedings of the Third IASTED International Conference on "Visualization, Imaging, and Image Processing". -- Benalmadena 2003,. -- Vol. II pp. 838-842
Rights: by-nc-nd
Appears in Collections:Actas de congresos
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