[Insight-users] Multilabel dilation

[Dženan Zukić]

I have an image and n points (n small, 5-20). I want to calculate influence
area of each point. Each voxel in an image can be influenced by at most 1
point, by closest point if distance to it is less then let's say 50mm,
otherwise it is not influenced by any point.

I thought I could do this by clearing the image, labeling the n points with
numbers 1-n, and then using DilateImageFilter, if it can somehow handle
this case. Perhaps do it in steps: dilate by a small amount (5mm). See
attached images.

Is there something like multi-label dilation image filter? Or
does gray-scale dilation filter does this? How about PadLabelMapFilter? Or
would it even be faster and more convenient to iterate through all the
voxels, calculate distances to all n points and then deduce to which point
the given voxel belongs, if any?
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