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ICPR
2004
IEEE

Synchronization and Calibration of Camera Networks from Silhouettes

9 years 6 months ago
Synchronization and Calibration of Camera Networks from Silhouettes
We propose an automatic approach to synchronize a network of uncalibrated and unsynchronized video cameras, and recover the complete calibration of all these cameras. In this paper, we extend recent work on computing the epipolar geometry from dynamic silhouettes, to deal with unsynchronized sequences and find the temporal offset between them. This is used to compute the fundamental matrices and the temporal offsets between many view-pairs in the network. Knowing the time-shifts between enough viewpairs allows us to robustly synchronize the whole network. The calibration of all the cameras is recovered from these fundamental matrices. The dynamic shape of the object can then be recovered using a visual-hull algorithm. Our method is especially useful for multi-camera shape-fromsilhouette systems, as visual hulls can now be reconstructed without the need for a specific calibration session.
Sudipta N. Sinha, Marc Pollefeys
Added 09 Nov 2009
Updated 09 Nov 2009
Type Conference
Year 2004
Where ICPR
Authors Sudipta N. Sinha, Marc Pollefeys
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