[Insight-users] Re: volume reconstruction ?

[Luis Ibanez]

Hi Javad,


1) Are you computing the distance map using
    any of the ITK distance map filters ?


    For example:

    a) DanielssonDistanceMapImageFilter
http://www.itk.org/Insight/Doxygen/html/classitk_1_1DanielssonDistanceMapImageFilter.html

    b) MaurerDistanceMapImageFilter
http://www.itk.org/Insight/Doxygen/html/classitk_1_1SignedMaurerDistanceMapImageFilter.html


    If so, these filters also give as output the Voronoi map
    of the initial point to which the distance map has been
    computed, and it will give you the distance vector to the
    closest point.

    Please read the description in the ITK Software Guide:

         http://www.itk.org/ItkSoftwareGuide.pdf

    Section 6.8 "Distance Map" , pdf page 248-252.



2) Otherwise, please describe better how you are computing
    your distance map, and what is actually the purpose of
    your computation. From your description it seems that
    you are solving a minimum path walk problem. In which
    case you are probably minimizing an energy functional
    over the domain of possible paths between two points.

    Please give us more details of what you are trying to
    achieve.


3) You will find a contribution of a Graph framework in the
    Insight Journal. These contribution was intended to be
    added to ITK but it is contaminated with a Patent issue
    and it has not been possible to purify it enough to add
    it to the toolkit.



   Regards,



       Luis



------------------------------
Javad Hasani Bidgoli wrote:
> Dear Luis,
> 
> Thanks for your patiently support. I send my question to itk users but I
> didn't receive any reply. It is appreciated if you could help me. 
> Is Three any class or function for spanning tree computation of a distance
> map(graph). I need calculating the minimum path from seed to end point of a
> distance map.
> 
> Best,
> Javad 
> 
> 
> ---------- Original Message -----------
> From: Luis Ibanez <luis.ibanez at kitware.com>
> To: sami bourouis <sami.bourouis at hotmail.com>
> Cc: insight-users at itk.org
> Sent: Sun, 04 Feb 2007 12:29:59 -0500
> Subject: [Insight-users] Re: volume reconstruction ?
> 
> 
>>Hi Sami,
>>
>>What exactly do you mean by "reconstruction" ?
>>
>>ITK is N-Dimensional, you can take an input 3D image
>>and segment it to produce an output binary 3D image.
>>
>>"Reconstruction" is in general an obsolete term and
>>an obsolete task. Today, you only need to do such
>>thing when the image acquisition method cannot guarantee
>>their alignment, for example when the images are taken
>>from microtome slices.
>>
>>   Regards,
>>
>>      Luis
>>
>>--------------------
>>sami bourouis wrote:
>>
>>>Hi,
>>>
>>>I am wondering if there is any way to do reconstruction of volumetric 
>>>image after segmentation process in ITK.
>>>
>>>Thanks,
>>>
>>>_________________________________________________________________
>>>MSN Hotmail : créez votre adresse e-mail gratuite & à vie ! 
>>>http://www.msn.fr/newhotmail/Default.asp?Ath=f
>>>
>>>
>>
>>_______________________________________________
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> 
> ------- End of Original Message -------
> 
>