[Insight-users] LabelDiameter

[Nicholas Tustison]

Or you could use Maurer which is much faster.

http://www.itk.org/Doxygen/html/classitk_1_1SignedMaurerDistanceMapImageFilter.html

On May 29, 2012, at 10:01 AM, Pietro Nardelli wrote:

> Hi again Luis,
> 
> thank you, this suggestion seems perfect! I'll try ti use it: if I got
> it right, to compute a signed distance map I have to use the
> SignedDanielssonDistanceMapImageFilter. Am I correct?
> 
> Thanks a lot,
> 
> Pietro
> 
> 2012/5/28 Luis Ibanez <luis.ibanez at kitware.com>:
>> Hi Pietro,
>> 
>> The following suggestion will not prevent your airways
>> label segmentation from having bigger diameters in
>> the lower branches, but it should help you detect
>> if it happens.
>> 
>> Take the label image, compute a signed distance map
>> from it, and then use the Minimum / Maximum image
>> filter to detect local extrema.
>> 
>> If the diameters were monotonically decreasing,
>> you shouldn't find any extrema in the distance map
>> (at least in theory.... the discretionary may artificially
>> create some though...).
>> 
>> 
>>     Luis
>> 
>> 
>> -------------------------------------------------------------
>> On Mon, May 28, 2012 at 11:12 AM, Pietro Nardelli <pie.nardelli at gmail.com>
>> wrote:
>>> 
>>> Hi all,
>>> 
>>> I have a question: does exist a function to compute the diameter of a
>>> volume label? I'm segmenting the airway of the lung and I need to be
>>> sure that the label's diameter of the deepest branches isn't greater
>>> than the diameter of the higher ones.
>>> 
>>> Thank you very much,
>>> 
>>> Pietro
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