[vtkusers] adding noise to vtkImageData

[Oleksandr Dzyubak]

Correct. That is for ITK.

However, there have been classes developed for bridging ITK-VTK.
You can download InsightApplications from
http://itk.org/ITK/resources/software.html
and under directory InsightApplications/Auxiliary/vtk
you can find plenty of examples how to do that.

Another option could be re-mastering the code by Gaetan Lehmann.

Regards,
Alex

David Doria 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
>