[vtkusers] Visualization of Diffusion Tensor Fields

[Olivier Coulon]

"Sohan R. Ranjan" wrote:

> Does VTK have visualization tools for Diffusion Tensor Field?
>
> Sohan
>
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Sohan,
it depends on how you want to represent your tensors, but a straightforward way is to use the
vtkTensorGlyph class.
You can define a StructuredPoints area with your tensor field and additional scalar fields
(anisotropy, etc...) and then pass them to the vtkTensorGlyph, with a sphere for the source.
You'll have ellipses representing you tensor, oriented and scaled according to the eigenvalues
and eigenvectors. Mapping scalars on the ellipses helps to see relevant information but it
still is difficult to handle when the volume is big.
Here is a Tcl script assuming that you have a StructuredPoints file containing you tensors and
scalars.

- Olivier


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