0000000001253684
AUTHOR
Cédric Demonceaux
Calcul de pose d'un réseau de caméras hybrides à partir de droites
We present a pose estimation approach for a setup of multiple hybrid cameras using line features. From line images across at least three single viewpoint cameras such as perspective, central catadioptric or fish-eye ones, the camera poses are recovered by a decoupling of rotations and translations : rotations are estimated from vanishing points of parallel lines and translations are calculated from known rotations and line images. The 3D lines are reconstructed by the triangulation of projective planes passing through line correspondences. The camera poses and 3D scene are finally refined by bundle adjustment. This technique can be used to recover the topology of a multiple hybrid camera sy…
Self-Calibration of PTZ Camera using New LMI Constraints
International audience
Control of a PTZ camera in a hybrid vision system
In this paper, we propose a new approach to steer a PTZ camera in the direction of a detected object visible from another fixed camera equipped with a fisheye lens. This heterogeneous association of two cameras having different characteristics is called a hybrid stereo-vision system. The presented method employs epipolar geometry in a smart way in order to reduce the range of search of the desired region of interest. Furthermore, we proposed a target recognition method designed to cope with the illumination problems, the distortion of the omnidirectional image and the inherent dissimilarity of resolution and color responses between both cameras. Experimental results with synthetic and real …