[Insight-users] Bilateral Filter units

[Bradley Lowekamp]

Hello,

Usually a quick look at the source code:
https://github.com/Kitware/ITK/blob/master/Modules/Filtering/ImageFeature/include/itkBilateralImageFilter.hxx#L85

or a brief experiment of changing the spacing of the image can reveal the answer.

It appears to in in physical space. Generally that is true in ITK for size-like parameters when it is a real type.

Brad

On Jul 5, 2013, at 9:42 AM, Mathew Guilfoyle <mrguilfoyle at gmail.com> wrote:

> Hi,
> 
> What the units are for the domain sigma argument to the BilateralImageFilter?
> 
> Is it number of pixels/voxels or does it take into account the voxel spacing?  e.g. if my image has 2x2x2mm voxels and I supply '3' for the domain sigma is it 3 voxels (i.e. 6mm) or 3mm?
> 
> Thanks
> Mat
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