[vtkusers] adding noise to vtkImageData

[David Doria]

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