[Insight-users] BinaryFunctorNeighborhoodImageFilter ?

[Jordi Inglada]

Jim,

Thanks for your answer. It wasn't clear from my message, but my idea in 
deriving a class from the BinaryFunctorImageFilter was being able to 
change the processing strategy by  using  the functor template.

Jordi.

Miller, James V (Research) wrote:

>Jordi, 
>
>I would just make a filter that subclasses from ImageToImageFilter.
>You can write a GenerateData() or ThreadedGenerateData() method
>to implement your algorithm.  You'll just need two neighborhood 
>iterators, one for each input image.
>
>You should also provided a GenerateInputRequestedRegion() method
>that takes the output requested region and pads it by the radius
>of the neighborhood for your computation.  That way if a user 
>streams data through your filter, you will not have an artificial
>boundary condition.
>
>A filter like the Code/BasicFilters/itkNoiseImageFilter might be 
>a good place to start.  It has a fairly clean implementation of 
>using neighorhood iterators to calculate the standard deviation
>of pixel values in a neighborhood about each pixel.  For your 
>case, you will have two neighborhood iterators and will have to 
>modify the GenerateInputRequestedRegion() to calculate the input
>requested region for both of your inputs.  You'll also need to 
>add methods to set the second input.
>
>Jim
>
>
>-----Original Message-----
>From: insight-users-bounces at itk.org
>[mailto:insight-users-bounces at itk.org]On Behalf Of Jordi Inglada
>Sent: Thursday, March 10, 2005 10:38 AM
>To: insight-users at itk.org
>Subject: [Insight-users] BinaryFunctorNeighborhoodImageFilter ?
>
>
>Hi all,
>
>I want to implement a filter which produces an output whose pixels are 
>computed from 2 input images. The computation is not made pixel-wise, 
>but by combining the neighborhoods of the homologous pixels of the 2 
>input images.
>
>As far as I understand, the BinaryFunctorImageFilter is not appropriate 
>for this task since the functor used takes pixel values as input instead 
>of neighborhoods.
>
> Actually, I would need to replace the ImageRegionConstIterators for the 
>input images by ConstNeighborhoodIterators in the ThreadedGenerateData 
>of the BinaryFunctorImageFilter.
>
>Does this kind of filter already exist in Itk?
>
>Or should I create som kind of BinaryFunctorNeighborhoodImageFilter?
>
>Regards,
>
>Jordi.
>
>  
>


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