![Tanjarul Islam Mishu
[@tanjarul26]
Dept. of CSE
Jatiya Kabi Kazi Nazrul Islam University
PRESENTATION
ON
DYNAMIC TIME WRAPPING](https://image.slidesharecdn.com/dynamictimewrapping-170925193020/85/Dynamic-time-wrapping-1-320.jpg)
![HOW IT WORKS [DTW]
i
j
t(i-1)
r(j)
),1(
)1,1(
)1,(
min
)()(),(
jiD
jiD
jiD
jritjiD
),( jiD
r(j-1)
t(i)
t: input sequence
r: reference sequence
Local paths: 0-45-90 degrees
DTW of two sequences:](https://image.slidesharecdn.com/dynamictimewrapping-170925193020/85/Dynamic-time-wrapping-4-320.jpg)
Dynamic time wrapping
- 1. Tanjarul Islam Mishu [@tanjarul26] Dept. of CSE Jatiya Kabi Kazi Nazrul Islam University PRESENTATION ON DYNAMIC TIME WRAPPING
- 2. OUTLINES What is Dynamic Time Wrapping ? How It Works Restrictions on the Warping Function
- 3. DYNAMIC TIME WRAPPING Well-known technique for measuring similarity between two sequences which may vary in speed.
- 4. HOW IT WORKS [DTW] i j t(i-1) r(j) ),1( )1,1( )1,( min )()(),( jiD jiD jiD jritjiD ),( jiD r(j-1) t(i) t: input sequence r: reference sequence Local paths: 0-45-90 degrees DTW of two sequences:
- 5. Monotonicity: does not go back in time index. Continuity: does not jump in time index. i j i j Boundary Conditions: starts at the bottom left and ends at the top right Warping Window: not too far from the diagonal n m i j (1,1) i j r RESTRICTIONS ON THE WARPING FUNCTION
Editor's Notes
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