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Talking about undecimated DWT let's focus here on SWT algorithm.

SWT is said to be:

  • numerically more stable due to Mallat algorithm. And the inverse operation is capable of returning the original signal which is not the case with CWT
  • SWT is computationally faster than CWT

On the other hand:

  • SWT works on dyadic scale while with CWT you can choose any scale sampling

Are there any other factors supporting the choise of one or another alternative?

endolith
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1 Answers1

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Are there any other factors supporting the choice of one or another alternative?

  • possibility to use almost any wavelet shape (and associated sampling) or signal-matched: in favor of the CWT
  • possible parallelization in cycle-spinning form: in favor of SWT
  • tunable redundancy factor: in favor of the CWT
  • possibility to derive sharp signal/noise estimators for denoising: in favor of SWT
  • geometrical extensions (direction, shear, anisotropy) in higher dimension: in favor of the CWT
Laurent Duval
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