[Insight-users] Image units

[Sylvain Jaume]

Hi Markus,

vtkMarchingCubes creates a mesh in physical space (it considers the 
voxel spacing). Note that last week I fixed a bug with the extent in 
vtkMarchingCubes. You may update your VTK CVS. Otherwise your mesh may 
be shifted.

Regards,
Sylvain

Markus Weigert wrote:
> Hello all,
> 
> I have a question concerning the conservation of image units when going 
> from ITK to VTK.
> I used the vtkMarchingCubes filter to mesh two segmentations (itk::Image 
> volumes) which I converted to
> VTK with the itkImageToVtkImageFilter.
> Then, I analyze their surface deviation using the open source MESH tool.
> My question is what type of coordinates does the Marching Cubes filter 
> produce (physical or index)
> or actually is there anything I have to take care of when going from ITK 
> to VTK???
> This may become important in interpreting the distance of the meshes in 
> real physical
> units (mm) or just as some abstract measure.
>  
> Regards,
> Markus
> 
> 
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