The denoising tag has no wiki summary.
3
votes
1answer
36 views
Spectral analysis of positive signals
Suppose that I have a sensor that can acquire samples $X[k]$ of the Fourier transform of an unknown signal $Y[t]$. An example is MRI, where the acquired data is in $k-$space. Now suppose that the ...
1
vote
1answer
154 views
How to denoise a conversation between two people?
I would like to know how to determine (using any programming language) whether a given audio file contains noise, such as of people talking in background, how to remove the noise, and how to ...
2
votes
1answer
112 views
wavelet denoising routine for environmental data series
I have a time series of water temperature, e.g.
y = 1+(30-10).*rand(1,365);
I have previously used the wavelet denoising routine in the wavelet toolbox by matlab ...
6
votes
1answer
191 views
Gradient of total variation of magnitude of complex function for denoising
Say I have a complex function $f^*$ (e.g. a MRI image) that has a near piece-wise constant magnitude, but a non constant phase.
If I have an optimization problem to find $f^*$ and set up an objective ...
6
votes
3answers
181 views
Solving optimization problem used for high quality denoising
The highest voted answer to this question suggests that to denoise a signal while preserving sharp transitions one should
minimize the objective function:
$$ |x-y|^2 + b|f(y)| $$
where ...
6
votes
1answer
142 views
What is Super-Resolution, in the context of windowing?
I have been trying to understand what super-resolution is, in the context of DSP/DIP. What criteria is being maximized/minimized, and why?
Most of my online searches yield super-res techniques from ...
