[Insight-users] how to extract a surface from a binary volume data

[Luis Ibanez]

Hi Vincent,

It should not be necessary to do the extraction of the border
pixels before using the vtkContour filter.

In fact, if you extract the border pixels first, then the
vtkContour filter will give you a double surface.

The contour extraction from the original binary volume should
be faster (or at least as fast) as processing the border pixels.


    Regards,


       Luis



=========================
Vincent Daanen wrote:
> Hi,
> 
> I did this in the past with a filled binary volume and the computation 
> time was prohibitive !
> So, if your volume is filled, you should get the 'border' voxels (with a 
> binary dilation followed by a substraction by example) and then use the 
> marching cube algo to extract the surface.
> 
> V
> 
> Tao, Xiaodong (GE, Research) a écrit :
> 
>> Songyuan,
>>  
>> I assume you are using itk for image IO. So first you need an 
>> itk::ImageToVTKImageFilter to connnect the itk world to the vtk world, 
>> then you can use vtkImageMarchingCubes to extract a surface at a given 
>> iso-value.
>>  
>> Xiaodong
>>
>>     -----Original Message-----     From: 
>> insight-users-bounces+taox=research.ge.com at itk.org on behalf of Tang 
>> Songyuan     Sent: Tue 5/2/2006 6:43 AM     To: insight-users at itk.org 
>>     Cc:     Subject: [Insight-users] how to extract a surface from a 
>> binary volume data
>>     
>>     
>>
>>     Hi, I have a binary volume data. I want to extract the
>>     surface of the volume. How can I do it. Thanks
>>     
>>     Songyuan
>>     
>>     
>>                    
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> 
>