[vtkusers] vtkImageData & tensors & filters

[Chr. Rossmanith]

Hi,

I think it would be very useful to have such operators for tensor valued image volumes, e.g.
in the context of processing MR diffusion tensor image data.

Christina Rossmanith
--
University Hospital Mannheim,
University Heidelberg


Alexandre Guimond wrote:

> Hi.
>
> I'm dealing with tensors that are organized on what the vtk user's
> guide calls "structured points", ie a rectangular, evenly spaced
> grid.  Hence, I'm placing them in a vtkImageData.
>
> A few operations that I need to do on tensors are generalizations to
> tensors of filters that exist in the imaging toolbox for scalars.
> Examples of this are mathematical operations or shrinking.
>
> What I'm wondering now is if I should write new filters for tensors or
> extend the vtk ones.  It's obviously not worth it for me to extend the
> vtk ones if vtk is not willing to use the modifications.  Hence the
> question: would the vtk folks be interested in code that generalizes
> of a few imaging classes to cope with tensors, or is the goal to only
> deal with scalar data in image filters?  That also implies a few
> modifications to vtkImageSource, etc. for memory allocations
> purposes, etc.
> --
> Alexandre Guimond, Ph.D. guimond at bwh.harvard.edu Phone:(617) 278-0800
> http://spl.bwh.harvard.edu:8000/~guimond/          Fax:(617) 264-5154
> Brigham and Women's Hospital, Harvard Medical School
> CNI, RF396, 221 Longwood Av, Boston, MA 02115