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Results tagged with cwt
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user 62730
Continuous Wavelet Transform. Time-frequency localization method with a wavelet kernel correlating against signal across scales and translations. Is non-orthogonal and overcomplete (unlike Discrete WT), varies time & frequency resolution across scales (unlike STFT), and is invertible. Usage includes image compression, multi-resolution analysis, instantaneous frequency estimation, transient detection, feature extraction.
0
votes
1
answer
507
views
Not showing the right frequency in ssqueezepy CWT plot
import numpy as np
from ssqueezepy.visuals import imshow
from ssqueezepy import cwt
def _t(min, max, N):
return np.linspace(min, max, N, False)
def cos_f(freqs, N=128, phi=0):
return np.concatenate … ([np.cos(2 * np.pi * f * (_t(i, i + 1, N) + phi))
for i, f in enumerate(freqs)])
wavelet = ('morlet', {'mu': 5})
f, N = 12, 512
x = cos_f([f], N=N)
Wx, scales, *_ = cwt(x, …
- 157
2
votes
1
answer
96
views
what are the advantages of higher-order Generalized Morse Wavelets?
What are the advantages of the higher-order Generalized Morse Wavelets in comparison with the first-order ones?
Are they also more computationally expensive?
- 157
0
votes
1
answer
560
views
Is online Continuous Wavelet Transform possible?
Also, if it is possible, does one need to compute the CWT of the whole window signal or simply a portion of it, like in a recursive way. I started learning wavelets and I look forward to any hints. …
- 157
3
votes
1
answer
621
views
Does Fast Continuous Wavelet Transform (fCWT) have theory-supported novelty or just simply a...
Is this fCWT a novelty in wavelet concept or just an optimization on the digital CWT computation? …
- 157
0
votes
0
answers
22
views
Is it possible to update wavelet packet from fixed-sized window of data without repeating th...
Assume that a scalogram is generated from performing wavelet packet in a fixed size window of data. Then, is it possible to update the scalogram with the incoming and outgoing data points without perf …
- 157