[Insight-users] Re : 3D Fourier Descriptors in itk? please help! how to get outer voxels of the segmented object?

[Marion Rizet]

Hi Luis and thank you for your reply...I thought I will never get an answer.
 
sorry about my bad presentation of the question.
 
1- I have a volume of a segmented object (3D image) and I would like to compute the 3D fourier descriptors of the voxels which are located on its surface.
 
2-Now I 'm facing another problem which is how I can extract the surface voxels?
A possible way is to use triangleMeshToBinaryImageFilter but since I have already a volume I don't want to extract the surface and then convert the extracted surface to an image. Is there any fatest way to get the outer voxels of the segmented object without converting it to a mesh?
hope I have made myself clear. 
 
Thanks
Marion

--- En date de : Mar 30.6.09, Luis Ibanez <luis.ibanez at kitware.com> a écrit :


De: Luis Ibanez <luis.ibanez at kitware.com>
Objet: Re: [Insight-users] Re : 3D Fourier Descriptors in itk? please help!
À: "Marion Rizet" <marion.rizet at yahoo.fr>
Cc: "insight" <insight-users at itk.org>
Date: Mardi 30 Juin 2009, 21h31




Hi Marion,


             Your email is contradictory.


First you say that you want:

  "Fourier descriptors of a volume (surface points)"

but then you say that you want:

  "I'm looking for 3D fourier descriptors acting on voxels."


Please clarify,



Also,
Would you consider using Spherical Harmonics
as approximation to the Surface (Mesh) ?



  Thanks


    Luis



-------------------
Marion Rizet wrote:
> Hi all,
> I've sent my question last week but till no reply. I post it here again hoping I can get answer from you.
> Thanks for your time
> Marion
> 
> 
> --- En date de : *Ven 19.6.09, Marion Rizet /<marion.rizet at yahoo.fr>/* a écrit :
> 
> 
>     De: Marion Rizet <marion.rizet at yahoo.fr>
>     Objet: [Insight-users] 3D Fourier Descriptors in itk?
>     À: "insight" <insight-users at itk.org>
>     Date: Vendredi 19 Juin 2009, 11h53
> 
>     Dear all,
>     I would like to know is there any itk code or class to compute
>     Fourier descriptors of a volume (surface points). I’ve checked in
>     itk mailing list but I have only found the example
>     FourierDescriptors1.cxx, under:  Insight/Examples/Numerics.
>     the given code is designed for pixels but I'm looking for 3D fourier
>     descriptors acting on voxels.
>     Thanks for your time and help.
>     Reagrds
>     Marion
> 
>   
>   
> 
> 
>     -----La pièce jointe associée suit-----
> 
>     _____________________________________
>     Powered by www.kitware.com
> 
>     Visit other Kitware open-source projects at
>     http://www.kitware.com/opensource/opensource.html
> 
>     Please keep messages on-topic and check the ITK FAQ at:
>     http://www.itk.org/Wiki/ITK_FAQ
> 
>     Follow this link to subscribe/unsubscribe:
>     http://www.itk.org/mailman/listinfo/insight-users
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _____________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> 
> Please keep messages on-topic and check the ITK FAQ at: http://www.itk.org/Wiki/ITK_FAQ
> 
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users



      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20090709/15f63040/attachment.htm>