Phase registration of a single quasi-periodic signal using self dynamic time warping

Authors:
Yasushi Makihara;Ngo Thanh Trung;Hajime Nagahara;Ryusuke Sagawa;Yasuhiro Mukaigawa;Yasushi Yagi
Affiliations:
Osaka University, Ibaraki, Osaka, Japan;Osaka University, Ibaraki, Osaka, Japan;Kyushu University, Nishiku, Fukuoka, Japan;AIST, Umezono, Tsukuba, Ibaraki, Japan;Osaka University, Ibaraki, Osaka, Japan;Osaka University, Ibaraki, Osaka, Japan
Venue:
ACCV'10 Proceedings of the 10th Asian conference on Computer vision - Volume Part III
Year:
2010

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Abstract

This paper proposes a method for phase registration of a single non-parametric quasi-periodic signal. After a short-term period has been detected for each sample by normalized autocorrelation, Self Dynamic Time Warping (Self DTW) between a quasi-periodic signal and that with multiple-period shifts is applied to obtain corresponding samples of the same phase. A phase sequence is finally estimated by the optimization framework including the data term derived from the correspondences, the regularization term derived from short-term periods, and a monotonic increasing constraint of the phase. Experiments on quasiperiodic signals from both simulated and real data show the effectiveness of the proposed method.