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Antoni Parellada's user avatar
Antoni Parellada's user avatar
Antoni Parellada's user avatar
Antoni Parellada
  • Member for 7 years, 2 months
  • Last seen more than a week ago
15 votes
5 answers
7k views

“The Fourier transform cannot measure two phases at the same frequency.” Why not?

8 votes
4 answers
2k views

The Number of Sine and Cosine Waves in an $ N $ Point DFT

2 votes
0 answers
61 views

Explicit formulation of the role of eigenvectors of the matrix of a linear time-invariant filter

1 vote
0 answers
324 views

Connecting DWT matrix operations to Daubechies D4 scaling $\left(\phi(x)\right)$ and wavelet $\left(\psi(x)\right)$ functions by plotting

1 vote
1 answer
87 views

Why am I not getting the intended coefficients in this 2D Fourier demonstration?

1 vote
1 answer
346 views

How can extract the cosine transform formula used for 2D by scipy.fft.dct

1 vote
2 answers
93 views

What is the most likely imaging processing step associated with the term 'Riesz' in clinical MRI?

1 vote
1 answer
1k views

Reading the amplitude values of a FFT in ImageJ

0 votes
1 answer
3k views

How to get the data (pointwise frequency, amplitude and phase) in a FFT performed on ImageJ?

-1 votes
1 answer
118 views

From Fourier (k space) to wavelet domain in MRI sensing