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Effects of time normalization on the accuracy of dynamic time warping

: Henniger, O.; Müller, S.


Institute of Electrical and Electronics Engineers -IEEE-:
BTAS 2007, First IEEE International Conference on Biometrics. Theory, Applications and Systems : September 27th to 29th, 2007, Washington DC
New York, NY: IEEE, 2007
ISBN: 978-1-4244-1597-7
ISBN: 1-4244-1597-7
6 S.
International Conference on Biometrics - Theory, Applications and Systems (BTAS) <1, 2007, Washington/DC>
Fraunhofer SIT ()
biometric; handwritten signature

This paper revisits Dynamic Time Warping, a method for assessing the dissimilarity of time series. In particular, this paper provides theoretical and experimental evidence showing that uncritical normalizing the length of the time series to be compared has a detrimental effect on the recognition accuracy in application domains such as on-line signature recognition, where the length of compared time series matters for their classification as match or non-match.