[Insight-users] How to get update or actual speed from level set image filter

[Luis Ibanez]

Hi Nils,

Please look at the method

      ComputeUpdate()

in any of the LevelSet methods.

If you grep for "ComputeUpdate()" in

     Insight/Code/BasicFilter
     Insight/Code/Algorithms


you will find most of them.



Note that this is the update for ONE pixel.



    Regards,


       Luis



-------------------
Nils H. Busch wrote:

> Hello,
> 
> how can i get the update values (as an image) of a level set filter for
> each iteration ?
> By update, I mean the update values of the right hand size of the finite
> difference equation. Or even better, how can i get the current speed per
> iteration,  not only the static part of the speed image, but the whole
> speed term consisting of propagation speed etc for every valid pixel, e.g.
> the zero level set or the whole image. I need to check the speed that is
> actually computed by my level set filter derived from
> itkSegmentationLevelSetImageFilter, so this would at least grab the speed
> or update values for the specified layers.
> 
> I know that I need to attach an observer to the segmentation filter, but
> it is not quite clear to me how I can get access to the actual update
> values or computed speed term for all valid pixels.
> 
> Thanks.
> 
>