[Insight-users] Extraction of mandible

[Luis Ibanez]

Hi Ali,

Thanks for posting your code.

The likely source of the problem is that
you are currently setting the seed point
in the middle of the image:

       seed[0] = start[0] + size[0] / 2;
       seed[1] = start[1] + size[1] / 2;
       seed[2] = start[2] + size[2] / 2;


The seed point should be placed inside
the mandibule (or any other anatomical
structure that you want to segment).

Typically, a seed point is placed interactively
by offering a GUI+Visualization to the user.

There are multiple ways in VTK to get the
coordinates of a pixel in which the user has
clicked (for example the vtkWorldPointPicker)

You may also want to start with a smaller value
for the sigma multiplier (e.g. 1.5 instead of 2.5),
and only increase that value if your segmentation
doesn't include the entire mandible.

You may want to read the description of this
region growing segmentation filter in the
ITK Software Guide:

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



     Regards,


            Luis


------------------------------------------------------------------------------------------------------
On Fri, Mar 5, 2010 at 6:03 PM, Ali Habib <ali.mahmoud.habib at gmail.com> wrote:
> Dear Luis,
> I tried to use confidenceconnected filter, and watersheed filter but
> displaying the output is white
> I attached the confidence code I use , please help me in it
> Best regards
>
> On Tue, Feb 16, 2010 at 12:51 AM, Luis Ibanez <luis.ibanez at kitware.com>
> wrote:
>>
>> Hi Ali,
>>
>> What image modality do you have ?
>>
>> Do you have a CT scan ?
>>
>>
>> If so,
>> you may want to experiment with the following filters:
>>
>>
>>    1) ConfidenceConnectedImageFilter, or
>>    2) IsolatedConnectedImageFilter
>>
>>
>> You will find them described in the ITK Software Guide
>>
>>    http://www.itk.org/ItkSoftwareGuide.pdf
>>
>>
>> and you will find source code examples in
>>
>>           Insight/Examples/Segmentation
>>
>>
>>   Regards,
>>
>>
>>      Luis
>>
>>
>> ------------------------------------------------------------------
>> On Mon, Feb 15, 2010 at 8:43 AM, Ali Habib <ali.mahmoud.habib at gmail.com>
>> wrote:
>> > Dear All,
>> >
>> >
>> > I need to segemnt 3D reconstruction of skull,  do any one have any idea
>> > resource for doing that
>> >
>> > Best regards
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