[Insight-users] Levelset Methods

[mahshid farzinfar]

Hi Luis,

I want to use Level Set method to solve segmentation problem.   My initial
active contour is actually a Signed Distance Function Phi obtained by other
active contour methods, therefore seed points and applying Fast Marching
method could not help me. Maybe, I can't use idea behind of
GeodesicActiveCountourShapePriorLevelSetFilter in my method.

By the way I have another question. In the training part of my method, PCA
is used to train set of images represented by Signed Distance Function.
Converting binary images to SDF is easily possible. But my problem is how to
build binary image( labelObject) that shows the object ( ROI) and
background. I followed this link
http://www.itk.org/pipermail/insight-users/2008-May/025963.html but I have
still problem with PolygonSpatialObject. I could not find any good resource
in itkGuild. Could you please help me.

Thanks in advance.

Best regards,
Mahshid


On Thu, May 21, 2009 at 11:55 AM, Luis Ibanez <luis.ibanez at kitware.com>wrote:

>
> Hi Mahshid,
>
>
> I'm not sure that I understand your question.
>
> Do you want to reimplement the ITK level set methods ?
>
> or
>
> do you want to use them in order to solve a segmentation method ?
>
>
>
> Why do you make a difference between
>
>   *  "Fast Marching" methods and
>   *  "Level Set" methods
>
>
>
> Is there a reason why you can't use the current LevelSet methods
> in ITK ?
>
>
>    Regards,
>
>
>       Luis
>
>
>
> ------------------------
> mahshid farzinfar wrote:
>
>>  Hi all,
>>  I would like to use and implement Level Set Methods using ITK libraries.
>> As I undesrtand, ITK covers FastMarching Methods whitin its libraries. My
>> project is nearly related to the file
>> *"GeodesicActiveContourShapePriorLevelSetImageFilter.cxx".* May I know
>> whether it is possible to implement it using LevelSet Methods instead of
>> FastMarching Methods. Is there any libraries which cover LevelSet Methods?
>>  Thanks,
>> Best regards,
>> Mahshid
>>
>>
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