[R] signal extraction

[Aboubakar Maitournam]

Aboubakar Maitournam wrote:

> Paola Lecca wrote:
>
> > Hi !
> >
> > is there a package in R dedicated to the signal analysis ? I'm searching
> > for statistical methods for the signal extraction from background in a
> > digital image. Does R have a package to perform this kind of analysis ?
> >
> > Thanks a lot,
> > Paola.
> >
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>
> I think that the package  AnalyzeFMRI (see CRAN) is dedicated to the analysis of
> magnetic resonance Imaging
> via some modelling with splines and Fourier transformation. However this package
> seems not to be for the
> image preprocessing. In general the definition of noise in image is depending of
> the underlying modelling.
> There are certainly many methods of images segmentation which are not included in
> R.
> Perhaps you can use if it exists in R a package based on mixture
> modelling and use the threshold.of the corresponding histograms in order to
> discrimnate signal from background.
> I think that there is many other solutions which can be easily used for that task.
>
> Best regards.
>
> Aboubakar Maitournam.
>
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I have forgotten two packages based on wavelets transformations (see CRAN please) :
waveslim and wavethresh.

Aboubakar Maitournam.

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