[Insight-users] Create my own filter

[rashedk]

Hi Luis, 

Thanks for your quick reply. I was looking at itkBinaryFunctionImageFilter
since this closely resembles what my filter is aiming to accomplish. I have
two inputs Image1 and Image2. The output of the filter is a pixel-wise
selection of the intensity from either Image1 or Image2. At a pixel (x,y,z)
if Image1(x,y,z) > 0 then output(x,y,z) = image1(x,y,z) ELSE if
Image1(x,y,z) == 0 then output(x,y,z) = Image2(x,y,z). 

I am trying to modify the itkBinaryFunctionImageFilter, but dont understand
what m_Functor ( ) function in the ThreadedGenerateData( ) function does. I
can see that it implements the pixel-wise addition, but where is this
function defined? 

Thanks in advance, 

Rashed karim 


Luis Ibanez wrote:
> 
> 
> Hi Rashedk,
> 
> It is very easy to create ITK filters that take two images.
> 
> You may want to look first at the "itkBinaryFunctorImageFilter"
> 
> This is the base class of all the filters that take two images
> as input and compute a pixel-wise output.
> 
> You can ignore the "Functor" aspects of it, and focus on the
> SetInput1(), SetInput2() methods, the SetNumberOfRequiredInputs()
> call in the constructor.
> 
> There are many other filters in ITK that take two images as input.
> 
> For example:
> 
> $ grep -l "RequiredInputs( 2 )" *.txx
> itkBinaryFunctorImageFilter.txx
> itkContourDirectedMeanDistanceImageFilter.txx
> itkContourMeanDistanceImageFilter.txx
> itkDirectedHausdorffDistanceImageFilter.txx
> itkHausdorffDistanceImageFilter.txx
> itkInterpolateImageFilter.txx
> itkNaryFunctorImageFilter.txx
> itkPolylineMask2DImageFilter.txx
> itkPolylineMaskImageFilter.txx
> itkSimilarityIndexImageFilter.txx
> itkWarpImageFilter.txx
> itkWarpVectorImageFilter.txx
> 
> 
> Please let us know if you encounter any problems,
> 
> 
>     Thanks
> 
> 
>         Luis
> 
> 
> ----------------
> rashedk wrote:
>> Hi everyone, 
>> 
>> I am trying to write my own filter. The filter will take in two images
>> (of
>> the same type) as input and output a single image. All the images are of
>> the
>> same dimensions. I was looking at Chapter 13 of the ITK software guide,
>> especially 13.6. I don't know how to go about extending this since I have
>> two images as input. I am also not sure If it would be appropriate to
>> derive
>> from ImageToImageFilter. 
>> 
>> Any ideas how I should go about doing this? 
>> 
>> Thanks in advance, 
>> Rashed karim. 
>> 
>> 
> _______________________________________________
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> Insight-users at itk.org
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> 
> 

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