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In this paper, we consider the problem of estimating the spatiotemporal alignment between N unsynchronized video sequences of the same dynamic 3D scene, captured from distinct viewpoints. Unlike most existing methods, which work for N ¼ 2 and rely on a computationally intensive search in the space of temporal alignments, we present a novel approach that reduces the problem for general N to the robust estimation of a single line in IR N . This line captures all temporal relations between thedoi:10.1109/tpami.2008.301 pmid:20075460 fatcat:4six6q6cufgsfhz5iq5rbsiote