Temporal synchronization of non-overlapping videos using known object motion

This paper presents a robust technique for temporally aligning multiple video sequences that have no spatial overlap between their fields of view. It is assumed that (i) a moving target with known trajectory is viewed by all cameras at non-overlapping periods in time, (ii) the target trajectory is estimated with a limited error at a constant sampling rate, and (iii) the sequences are recorded by stationary cameras with constant frame rates and fixed intrinsic and extrinsic parameters. The proposed approach reduces the problem of synchronizing N non-overlapping sequences to the problem of robustly estimating a single line from a set of appropriately-generated points in RN+1 . This line describes all temporal relations between the N sequences and the moving target. Our technique can handle arbitrarily-large misalignments between the sequences and does not require any a priori information about their temporal relations. Experimental results with real-world and synthetic sequences demon...

• Type: Journal
• Year: 2011
• Where: PRL
• Authors: Darlan N. Brito, Flávio L. C. Pádua, Guilherme A. S. Pereira, Rodrigo L. Carceroni
• Keywords: Computer Networks, Multiple Video Sequences, PRL 2011, Sequences, Temporal Relations