[Insight-users] Multi-initial in the levelset processing

[Olivier Rousseau]

Hi Wenmin,
The curve you evolve using level set method can have several components. 
Then the signed distance function takes the distance to the closest 
component of the curve. This is a function that is well defined everywhere 
on the domain and which splits the plane into 2 parts: the inside (SD < 0) 
of the curve (which won't be connected) and the outside (SD > 0). In the 
level set method, you evolve the function, not the curve, so the algorithms 
involved don't really care about how many components there is.

Regards,
Olivier

On 6/21/05, 彭文敏 <pwm at dsp.whu.edu.cn> wrote:
> 
> Hello all！
> I am confused when there are multi-initial contours in the levelset 
> implementation.As <http://implementation.As> we know,we get the signed 
> distance as the initial levelset function,which is computed according to the 
> one curve.If you set multi curves in the image,then ,then how to get the 
> levelset function-which curve do we compute the SD according to, and how to 
> evolve the front of the curve?
> I propose the problem because it is said to have more efficiency if the 
> multi-initial seeds are set.
> Thanks!
> 
> 
> 
> Yours sincerely
> Wenmin Peng
> pwm at dsp.whu.edu.cn
> 2005-06-21
> 
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
> 
> 
> 
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://public.kitware.com/pipermail/insight-users/attachments/20050621/0fcc0443/attachment.html