[Insight-users] Segmentation based on discrete points

[Luis Ibanez]

Hi Xuan,

Do you have only the dense cloud or points ?

or
do you have also a topological surface that connects these points ?
(e.g. polygonal faces defining the surface)

---

If you only have the cloud of points, then, this is
an incompletely defined problem, and the best
you can hope to get is a "reasonable" partition
of space, but it will be impossible to guarantee
that a correct segmentation can be constructed.

---

Along the lines of "imperfect" but plausible methods:

One option that you may want to explore is to use
to dense set of points to turn on pixels in an underlying
image. If the cloud is dense enough, you may get lucky
and be able to create a closed surface of pixels.

If you get there, then partitioning the space will be
as simple as using the connected components filter
in ITK, or if you don't mind providing a seed point,
you could use the region growing filters.


      Regards,


           Luis


-------------------------------------------------------------------------
On Fri, Nov 13, 2009 at 12:27 PM, Xuan Zhao <xuanaux at gmail.com> wrote:
>
> Dear all,
>
> Is there a filter in ITK to do segmentation based on discrete points that
> specify the surface of a volume of interest(VOI)? Or in other word, is there
> a function in ITK that can discriminate whether a point is inside or outside
> the surface determined by densely distributed discrete points?
>
> Thank you in advance,
>
> Xuan
> --
> View this message in context: http://old.nabble.com/Segmentation-based-on-discrete-points-tp26331613p26331613.html
> Sent from the ITK - Users mailing list archive at Nabble.com.
>
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