# Questions tagged [wavelets]

For questions related to wavelets and wavelet theory.

315 questions
Filter by
Sorted by
Tagged with
30 views

• 322
64 views

• 115
29 views

### Pros/Cons to using Spectral and Diffusive Graph Wavelets

As I understand, there are two major methods of constructing wavelets on graphs. Spectral wavelets, from David K Hammond et. al, and diffusive wavelets from Coifman and Maggioni. I can't quite parse ...
• 41
40 views

1 vote
31 views

### Multidimensional signal synchronization

I am trying to find ways of synchronizing multidimensional waves gotten from the brain. For one dimensional signals, I used Cross correlation and was able to synchronise, but for multi dimensional ...
61 views

### DFT but using non-sinusoidal periodic waveforms.

Is there an established way of decomposing a discrete periodic (complex) signal into a sum of non-sinusoidal periodic waveforms (eg square, triangle, and sawtooth)? For my use case the input waveform ...
• 31
1 vote
38 views

### How to determine the integral limits of continuous wavelet transform?

Now I have one function $f(x)$, and its support interval is $x\in[T_0,T_1]$. The support interval of the mother wavelet $\psi(x)$ is $x\in[-\Delta,+\Delta]$. And we also know that the continuous ...
• 113
1 vote
37 views

17 views

### Why V2 is not dense in L2(R)?

v2 contains all of constant Piecewise function having compact supports with possible break on rational points denominators of 4.
92 views

### What is the orthonormal transform matrix of Daubechies 4 wavelet?

I read following paper : [2019, Emilie Chouzenoux, A Proximal Interior Point Algorithm with Applications to Image Processing]. problem The problem is constructed as Proximal interior point method, ...
48 views

### What is the wavelet decomposition operator matrix?

I read following paper. [2019, Emilie Chouzenoux, A Proximal Interior Point Algorithm with Applications to Image Processing] Wavelet operator The problem is constructed as Proximal interior point ...
57 views

### Wavelets vs Fourier Transforms

It's supposed that computing a spectrogram for a signal is faster using wavelets. However, wavelets need to be applied to the signal for every time step and frequency, giving the implementation a time ...
• 812
1 vote
46 views

### Show that Haar-wavelet is a wavelet.

In my textbook for wavelets I found an example which shows that the Haar-Wavelet $H$ is indeed a wavelet. So I need to show \$0 < 2\pi \int_\mathbb{R} \frac{|\widehat{H}(\omega)|^2}{|\omega|} d\...
• 123
28 views

### Overview of Current Applications of Wavelets

Pretty soft question, but what are the current applications of wavelets? I'm familiar with the typical example of signal/image compression and this seems to be what many books on the topic focus on, ...
• 111
1 vote