[Insight-developers] bug report on DeformableModelSimplexMesh application

[Leila Baghdadi]

Hi Defeng,

Yes I have used that code many a times. I am not sure if I understand
what you mean by "it does not converge". 

My understanding of deformable models is 

1. you must make sure your gradient image is created properly. Use
paraview to look at the vector image

2. you must play with the parameters to get the model to converge,

This is a specific type of deformable models which uses simplex mesh.
I suggest you read about this algorithm first. This is developed based
on the paper by Herve Delingette of INRIA france. 


Leila

On Thu, 2008-31-01 at 22:29 +0800, Defeng WANG wrote:
> Hello, ITK users and developers,
>  
> I found that DeformableModelSimplexMesh, provided in
> InsightApplications-3.4.0, does not converge. It seems that the
> deformable mesh will not stop near the boundary of one object to be
> segmented. I tried a very simple volume data set containing a sphere
> only. The initial mesh I used is a spherical simplex mesh inside it.
> However, by increasing the number of iterations, the mesh will
> continue to expand until it reaches outside of the image and the
> program reports error.
>  
> Is there anybody tried this program successfully before? Or anybody
> knows how to adjust the parameters properly to get right segmentation?
>  
> Best wishes,
> Defeng
> _______________________________________________
> Insight-developers mailing list
> Insight-developers at itk.org
> http://www.itk.org/mailman/listinfo/insight-developers