[vtkusers] existing filter to perform replace value on vtkImage

[Dominik Szczerba]

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Calculator filter?

David Doria wrote:
> On Tue, Feb 16, 2010 at 1:59 PM, Michael Jackson
> <mike.jackson at bluequartz.net> wrote:
>> Is there an existing filter where I can replace a value in the image if the
>> value does not meet some criteria? Something like:
>>
>> if (value < 255 ) value = 0;
>>
>> Thanks
>> _________________________________________________________
>> Mike Jackson                  mike.jackson at bluequartz.net
> 
> Two things come to mind -
> 
> 1) You can identify those regions with vtkImageThreshold:
> http://www.vtk.org/Wiki/VTK/Examples/Images/ImageThreshold
> http://www.vtk.org/doc/nightly/html/classvtkImageThreshold.html
> 
> 2) Maybe you can set all the pixels found in (1) to some specific
> value, and then you can use
> vtkImageMathematics::SetOperationToReplaceCByK to replace that
> specific value with 0 (as your original question suggested you want to
> do).
> 
> Hope that helps,
> 
> David
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