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Lemire, Daniel (2009). Faster retrieval with a two-pass dynamic-time-warping lower bound. Pattern Recognition, 42 (9). https://doi.org/10.1016/j.patcog.2008.11.030
File(s) available for this item:| PDF - 0811.3301v2.pdf |
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| Item Type: | Journal Articles |
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| Refereed: | Yes |
| Status: | Published |
| Abstract: | The Dynamic Time Warping (DTW) is a popular similarity measure between time series. The DTW fails to satisfy the triangle inequality and its computation requires quadratic time. Hence, to find closest neighbors quickly, we use bounding techniques. We can avoid most DTW computations with an inexpensive lower bound (LB Keogh). We compare LB Keogh with a tighter lower bound (LB Improved). We find that LB Improved-based search is faster. As an example, our approach is 2-3 times faster over random-walk and shape time series. |
| Official URL: | http://www.sciencedirect.com/science/article/pii/S... |
| Depositor: | Lemire, Daniel |
| Owner / Manager: | Daniel Lemire |
| Deposited: | 22 Jul 2014 21:51 |
| Last Modified: | 16 Jul 2015 00:47 |
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