[Insight-users] What is GetNeighborhoodIndex of the ShapedNeighborhoodIterator?

[David Doria]

On Mon, Jul 18, 2011 at 1:00 PM, Dawood AlMasslawi <masslawi at gmail.com>wrote:

> Yes, that makes sense!
>>
>> In the past I also had some trouble with neighborhood iterators  of a
>>
>> large radius, so I guess they are not utilized for that use. Probably
>>
>> it has something to do with the boundary condition, every time I
>>
>> iterated near the boundaries somethings went wrong!
>>
>> Dawood
>>
>
I'm not sure if this was the same problem you were having, but I have
figured out why the indices were higher than 100.

I was setting up the iterator with:

IteratorType iterator(image->GetLargestPossibleRegion().GetSize(), image,
image->GetLargestPossibleRegion());

However, this first parameter is interpreted as a radius. So the iterator
was actually 21x21 instead of 10x10 in the example, for a total of 441
indices. The indices 199 and 241 differ 42, exactly the right amount so that
they are still at offsets (0,1) and (0,-1) (two rows apart).

David
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