[Community] [Insight-users] Demons Deformable Registration and Paraview

[Matt McCormick]

Hi Tim,

Pointing to the exact code you are working with should really help or
if it is an example, referencing the example should help.

Paraview should help visualization the displacement fields.

The Transform Visualizer [1] Extension for 3D Slicer [2] may also be useful.

Hope this helps,
Matt

[1] http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Extensions/TransformVisualizer
[2] http://slicer.org/

On Mon, Oct 21, 2013 at 6:39 PM, Tim Bhatnagar <tim.bhatnagar at gmail.com> wrote:
> Hello all,
>
> Has anyone used Paraview to visualize Deformable Registration Displacement
> fields in Paraview? I am having trouble verifying what exactly paraview is
> showing me. A point (x,y,z) where I know a large y-deformation occurs does
> not exhibit that vector magnitude in Paraview, but it DOES seem to exist at
> a spatial coordinate that corresponds to where the large deformation ENDS
> (ie where the (x,y,z) point is located AFTER registration).
>
> Between this, and 'flipping' the x- and y- components of the vectors in the
> displacement field, I have managed to become very confused about the proper
> way to visualize the data.
>
> Note that after using WarpImageFilter with my registration-produced
> displacement field, I get the registered output I was looking for (yay!).
> It's just visualizing the proper deformation field for visual/qualitative
> figures is completely eluding me.
>
> Any help is greatly appreciated, though I feel like my emails in this
> user-list not up to par in terms of how I describe my problem, or the
> information I pass along is not enough to have an experienced ITKer chime
> in. If this is the case, please tell me what other info you need,as I'm
> happy to provide it.
>
> Alternatively, if it's best I address this to a Paraview-users community, I
> can try that. I just figured anyone who used Demons in ITK would most likely
> also visualize the field..
>
> Thanks,
> --
> Tim Bhatnagar
> PhD Candidate
> Orthopaedic Injury Biomechanics Group
> Department of Mechanical Engineering
> University of British Columbia
>
> Rm 5000 - 818 West 10th Ave.
> Vancouver, BC
> Canada
> V5Z 1M9
>
> Ph: (604) 675-8845
> Fax: (604) 675-8820
> Web: oibg.mech.ubc.ca
>
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