[Insight-users] About GVF METHODS

[Luis Ibanez]

Hi Christian,

You may want to try the following

1) Take the output of the ShapeDetectionLevelSet
     and pass it as input to a GeodesicActiveContoursLevelSet

2) Use the GradientVectorFlowImageFilter to generate
    a vector field from the original image, and connect
    the output of this GVF filter as the Advection field
    of the GeodesicActiveContoursLevelSet filter.


  Luis


---------------------------------------------------------------
On Sun, May 22, 2011 at 5:05 AM, christian kamewe
<christiankamewe at hotmail.com> wrote:
> Thanks you Luis,
>  i will try to implement this GVF  solution and i will turn back the
> solution after . I have implemented the Level set shape Detection  and i
> have a good results. Now  i like to know if it is possiblle to extract some
> objects with ITK.
> In fact, after the Level set  segmentation, my image have many
> objects(Example : Stomach, circle, triangle on the same image).I like just
> to extract the stomach or the circle on this image. it is possible with ITK
> , if yes, then can i know which filter i will use to  implement?
>  i join one image on this mail to show what i want...
> Thank you..
>
> Meilleurs Sentiments
>
> Christian KAMEWE
> Boulevard Dolez, 69
> 7000 Mons-BELGIQUE
> Faculté Polytechnique de Mons
>
>
>
>
>> Date: Sat, 21 May 2011 15:50:55 -0400
>> Subject: Re: About GVF METHODS
>> From: luis.ibanez at kitware.com
>> To: christiankamewe at hotmail.com
>> CC: Insight-users at itk.org
>>
>> Hi Christian,
>>
>>
>> 1) You could use seed points to initialize a level set,
>> by using the FastMarching image filter.
>>
>> Please see the examples in the ITK Software Guide
>>
>> http://ItkSoftwareGuide.pdf
>>
>> 2) You may find these previous posting interesting:
>>
>>
>> http://itk-insight-users.2283740.n2.nabble.com/Re-Segmenation-Error-after-set-advection-image-by-GVF-flow-td2437245.html
>>
>>
>> http://old.nabble.com/units-of-SetNoiseLevel-in-itkGradientVectorFlowImageFilter-td21957034.html
>>
>>
>> 3) I presume that what you have in mind is to generate
>> an Advection field with the GradientVectorFlow filter
>> and then use that advection field in a LevelSet filter,
>> such as the GeodesicaActiveContour one.
>>
>>
>>
>>
>> Luis
>>
>>
>> ------------------------------------------------------
>> On Sun, May 15, 2011 at 7:58 AM, <christiankamewe at hotmail.com> wrote:
>> > Hi sir
>> > i am a student and a subject of my thesis is to implement a level set
>> > methods and GVF methods to extract a stomach.
>> > now i have implement a LEVEL SET methods but i have two problems.
>> > firstly, i like to know if its possible to make your manual initialize
>> > and know what corresponding a seed point in a level set methods?  and
>> > secondly how can i implements a GVF methods with level set? its possible to
>> > implement a snake methods with GVF in level set???
>> >
>