[Insight-users] Re: ITK Level Set Questions

[Pingkun Yan]

Hi Luis,

Can you give some suggestions on implementing multi-phase level sets
based on current itk level set methods?

I think the most naive approach may be evolving several active
contours (embedded in different level set maps) simultaneously and
minimizing the overlapping areas between them. What do you think of
it?

Pingkun

On 2/8/06, Luis Ibanez <luis.ibanez at kitware.com> wrote:
>
> Hi German,
>
>
> 1) The ITK PDE solver is using a finite differences approach.
>     This is relatively common, so you probably want to look at
>     books on numerical methods, rather than to specific papers.
>
>
> 2) The Level Set framework in ITK is not yet suitable for
>     being applied to Vector images. There are two possible
>     variations that are worth considering here.
>
>     2.1) When the image to be segmented is a Vector image
>
>     2.2) When the Level Set itself is a Vector image
>
>     Both cases are interesting, as well as their combination.
>     The option (2.1) may not be too hard to implement, since
>     it probably requires only to clarify some typedefs in the
>     level set filters.  The option (2.2) is a bit more involved.
>     These methods are also known as "multi-phase level sets".
>
>
> Please let us know if you have other questions,
>
>
>      Thanks
>
>
>         Luis
>
>
>
> ---------------------------
> German Eichberger wrote:
> > Hi Luis,
> >
> > I am new to level sets and found your name on the mailing list.  I  was
> > wondering if you could help me with two simple questions:
> >
> > 1) What numerical method is ITK using in their PDE solver? Is there a
> > paper I can read?
> > 2) I am planning to use vector value level set segmentations. In
> > particular I would like to have texture information and gradient
> > information together. Does  phi in the ITK level set equation work on
> > vector values. if so is there an example I can have a look at?
> >
> > Thanks a lot for your help and time,
> > German
> >
>
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
>