[vtkusers] adding noise to vtkImageData

[Prathamesh Kulkarni]

Right! I wish we had something like that in VTK, it might be a very useful
tool.

Prathamesh

On Mon, Jul 19, 2010 at 3:11 PM, David Doria
<daviddoria+vtk at gmail.com<daviddoria%2Bvtk at gmail.com>
> wrote:

> On Mon, Jul 19, 2010 at 12:54 PM, Oleksandr Dzyubak <adzyubak at gmail.com>
> wrote:
> > Hi Prathamesh,
> >
> > You might find useful the contribution "Noise Simulation"
> > from Gaetan Lehmann on 03-18-2010.
> >
> > http://www.midasjournal.org/browse/publication/721
> >
> > As stated by the author:
> > "Several kind of noise can be found in real images, mostly depending on
> the
> > modality
> > of acquisition. It is often useful to be able to simulate that noise, for
> > example
> > to test the behavior of an algorithm in the presence of a known amount of
> > noise.
> >
> > This contribution provides the filters to generate four kind of noise --
> > additive
> > gaussian, shot, speckle and salt and pepper -- as well as a PSNR
> > calculator."
> >
> > I am using that contribution for my development and it works well for me
> so
> > far.
> >
> > Alex
> >
> >
> > Prathamesh Kulkarni wrote:
> >>
> >> Hello all,
> >>
> >> I need to add different kinds of noise to a vtkImage. I have looked at
> >> vtkImageNoiseSource and vtkMath::Random().
> >>
> >> Of these,
> >>
> >> vtkImageNoiseSource only produces a uniform noise output - is there a
> way
> >> (already existing in vtk) to have a different underlying noise
> distribution?
> >>
> >> vtkMath::Random produces a random number - what is the internal
> >> distribution used here?
> >>
> >>
> >> Apart from these, are there any other better ways to adding noise to
> >> vtkImages?
> >>
> >>
> >> Thanks in advance,
> >>
> >>
> >> Prathamesh
> >>
> >>
> >>
> >> ------------------------------------------------------------------------
> >>
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> That is for ITK though, right?
>
> Thanks,
>
> David
>
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