[Insight-developers] Gaussian filtering.

[Mark Foskey]

In itk::RecursiveGaussianImageFilter, is Sigma measured in pixels? 
Assuming that it is, do we want to have an easy way select a sigma in 
world coordinates?  With anisotropic voxels, it might be nice if there 
were an easy way to simulate a spherical convolution kernel.

Also, when would you want to use DiscreteGaussianImageFilter instead of 
the Recursive version?  Is there a rule of thumb, along the lines of 
"if you aren't sure, use this one"?  Are there other Gaussian blurring 
filters I haven't noticed?

-- 
Mark Foskey    (919) 843-5436  Computer-Aided Diagnosis and Display Lab
mark_foskey@unc.edu            Department of Radiology, CB 7515, UNC
http://www.cs.unc.edu/~foskey  Chapel Hill, NC  27599-7515