[Insight-developers] Re: Recursive Gaussian : ITK Release 1.10

[Gunnar Farneback]

> 1) Yes, I agree with you in that this normalization is image dependent.
>     The test is usually done with an input image that has a single pixel
>     On, which is the equivalent of a discrete Dirac Delta.

Ok, with that restriction the test makes sense. I'm more doubtful
about the usefulness of having normalization for an impulse, however.

> 3) Yes, please look at the example:
> 
>             Insight/Examples/Filtering/
>                      ScaleSpaceGenerator2D.cxx
> 
> 
>     This example takes a 2D image as input and produces its
>     ScaleSpace image, which is a 3D image, where "scale" is
>     the 3rd coordinate.  Scale space analysis usually involves
>     to track isosurfaces of the 3D image in order to identify
>     image features that are stable across scale.
> 
>     An interesting exercise is to generate the 3D ScaleSpace
>     of a 2D image, then load it in to ParaView, VolView or
>     Slicer and generate isosurfaces on the scale.

Interestingly enough this example sets normalization across scale to
false.

/Gunnar