Effect of LCSS Matching Envelope - 1

 

The following example shows the effect of the LCSS matching envelope size on the match results. Two parameters define the envelope:

The spatial threshold is set independently for each dimension and its value is equal to a percentage of the standard deviation of query on the corresponding dimension. In the following examples ε=0.1 means that the spatial threshold of each dimension is set to 10% of its standard deviation.

The temporal threshold δ=1 means that matches that are 1 frame away are valid.

We show the match results for a variety of temporal and spatial threshold combination.

 

The query is a short sitting motion 56 keyframes long (or 2.3 seconds).

Matching parameters: LCSS, rotational parameterization, full-body area, no global position, no global rotation.

 

LCSS Example 1

 

 Video Description

(in order of appearance)


Full-size video
  1. The query
  2. Long pause
  3. δ=1 and ε=0.1. The  best 5-matches, from best to worst.
  4. Long pause
  5. δ=5 and ε=0.3. The  best 5-matches, from best to worst.
  6. Long pause
  7. δ=5 and ε=0.4 The  best 5-matches, from best to worst.
  8. Long pause
  9. δ=5 and ε=0.6. The  best 5-matches, from best to worst.
  10. Long pause
  11. δ=5 and ε=1. The  best 5-matches, from best to worst.
  12. Long pause
  13. δ=5 and ε=1. The  best 5-matches, from best to worst.
  14. Long pause
  15. δ=5 and ε=2. The  best 5-matches, from best to worst.
  16. Long pause
  17. δ=5 and ε=3. The  best 5-matches, from best to worst.
  18. Long pause
  19. δ=10 and ε=0.3 The  best 5-matches, from best to worst.
  20. Long pause
  21. δ=30 and ε=0.3 The  best 5-matches, from best to worst.
  22. Long pause
  23. δ=40 and ε=0.3 The  best 5-matches, from best to worst.
  24. Long pause
  25. δ=10 and ε=0.3 The  best 5-matches, from best to worst.
  26. Long pause
  27. δ=10 and ε=0.6 The  best 5-matches, from best to worst.
  28. Long pause
  29. δ=10 and ε=1 The  best 5-matches, from best to worst.
  30. Long pause
  31. δ=10 and ε=2 The  best 5-matches, from best to worst.
  32. Long pause
  33. δ=10 and ε=5 The  best 5-matches, from best to worst.

 

 

 

Effect of LCSS Matching Envelope - 2

 

Same as above except that the query motion is a slow walking motion 53 keyframes long (or 2.2 seconds).

Matching parameters: LCSS, rotational parameterization, full-body area, no global position, no global rotation.

 

LCSS Example 2

 

 Video Description

(in order of appearance)


Full-size video
  1. The query
  2. Long pause
  3. δ=5 and ε=0.3. The  best 5-matches, from best to worst.
  4. Long pause
  5. δ=5 and ε=0.4 The  best 5-matches, from best to worst.
  6. Long pause
  7. δ=5 and ε=0.6. The  best 5-matches, from best to worst.
  8. Long pause
  9. δ=5 and ε=1. The  best 5-matches, from best to worst.
  10. Long pause
  11. δ=5 and ε=2. The  best 5-matches, from best to worst.
  12. Long pause
  13. δ=5 and ε=3. The  best 5-matches, from best to worst.
  14. Long pause
  15. δ=10 and ε=0.3 The  best 5-matches, from best to worst.
  16. Long pause
  17. δ=30 and ε=0.3 The  best 5-matches, from best to worst.
  18. Long pause
  19. δ=40 and ε=0.3 The  best 5-matches, from best to worst.
  20. Long pause
  21. δ=10 and ε=0.6 The  best 5-matches, from best to worst.
  22. Long pause
  23. δ=10 and ε=1 The  best 5-matches, from best to worst.
  24. Long pause
  25. δ=10 and ε=2 The  best 5-matches, from best to worst.
  26. Long pause
  27. δ=10 and ε=5 The  best 5-matches, from best to worst.