[Insight-users] itkHessian3DToVesselnessMeasureImageFilter falseaura at the ends

[Atwood, Robert (DLSLtd,RAL,DIA)]

Hi, Alex:
I used that filter and observed that sort of effect (actually a
decreased value at intersections in my case)  but I understood it to be
a consequence of the maths; these pixels satisfy the criteria, what I
did was require a certain value in the original in combination with a
certain value in the filtered result to accept pixels as belonging to my
'vessels', if the original value was quite high but 'vesselness' low
then it could be a junction, if the original value too low then the
pixel could be rejected even with a moderate "vessellness" value 

But, if this is the wrong approach I should like to know !

Thanks


Robert


-----Original Message-----
From: insight-users-bounces at itk.org
[mailto:insight-users-bounces at itk.org] On Behalf Of Oleksandr Dzyubak
Sent: 18 August 2009 00:23
To: insight-users at itk.org
Subject: [Insight-users] itkHessian3DToVesselnessMeasureImageFilter
falseaura at the ends


Dear community,

I played with the itkHessian3DToVesselnessMeasureImageFilter class using
the example from the ITK distro "VesselnessMeasureImageFilter.cxx"
and found some side-effect.

The filter produces false broadenings ("spherical auras") at the ends of
vessels.
In attachment I am sending the pictures to demonstrate the effect.

Has anybody experienced similar effect?
Is there any recipe to avoid/reduce this?

Thanks,

Alex


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