[Insight-users] MedianImageFunction -- questions

[Robert.Atwood at diamond.ac.uk]

Hi,
I want to evaluate the median at several points in the image, rather than median filter the whole image and query those points. This would be simple if I could use itk::MedianImageFunction
However, I don't understand how to use this. How do you set the neighbourhood? 
The doxygen does not seem to show me any function for setting this, and inspecting the code I find this segment, as far as I can tell it always creates a 1x1x1 kernel? That's not what I want , do I misunderstand? The Doxygen states 

"
Calculate the median value in the neighborhood of a pixel.

Calculate the median pixel value over the standard 8, 26, etc. connected neighborhood. This calculation uses a ZeroFluxNeumannBoundaryCondition.
"

How do I access the "26,etc" neighbourhoods? Thanks
Robert


./ITK/Code/Common/itkMedianImageFunction.txx: 


 73   // Create an N-d neighborhood kernel, using a zeroflux boundary condition
 74   typename InputImageType::SizeType kernelSize;
 75   kernelSize.Fill( 1 );
 76
 77   ConstNeighborhoodIterator<InputImageType>
 78     it(kernelSize, this->GetInputImage(), this->GetInputImage()->GetBufferedRegion());
 79

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