[Insight-users] setting parameters for GaussianBlurImageFunction

[Luis Ibanez]

Hi Phillip,

I see your point now.

You are right, the class is fixing the values of
the m_MaximumKernelWidth and the m_MaximumError
on the constructor and does not have Set/Get
methods for these two member variables.

This has been entered as Bug # 464
http://www . itk . org/Bug/bug . php?op=show&bugid=464&pos=0

The solution seems to be to simply add Set/Get
macros for these two member variables. It shouldn't
take too long to fix this.

The possible lateral effects remain to be seen...


Regards,


   Luis


-------------------------
Phillip Cheng wrote:
> Hi Luis,
> 
> 
>>The way to solve the warning is not to increase
>>the tolerance on the error, but to increase the
>>size (in pixels) of the kernel.
> 
> 
> Yes, but as you point out, large kernels will increase computation time
> (especially since I'm working with 3D images).  I think a tolerance of 0.001
> will result in kernel sizes that are too large for my current needs.
> 
> Incidentally, it's not documented what units SetExtent() is supposed to
> take.  From the code it looks like it's in multiples of sigma (rather than
> units of pixels or distance)?
> 
> 
>>Just out of curiosity:
>>What is your criteria for selecting the sigma at each pixel ?
> 
> 
> The sigma I'm using depends on corresponding neighborhood information from a
> segmented registered image.  This is part of some exploratory research for
> partial volume correction on PET images.  The exact method of determining
> sigma is part of the research question...
> 
> Phillip
> 
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