[Paraview-developers] How to create a label map volume in ParaViewWeb?

[Sebastien Jourdain]

Hi Yuzheng,

I don't fully understand what you are trying to do, but if Zach can not
help you on that I can give a try.
If you want my help you will have to explain what is a "label map volume".

Otherwise inside ParaView you can certainly load and save vtkImageData.

Seb


On Tue, May 7, 2013 at 3:56 PM, Yuzheng Zhou <yuzheng.zhou at kitware.com>wrote:

> Hi All,
>
> I am working on a Midas workflow allowing users to visualize medical
> images using ParaViewWeb (PVW as below) and segment them using Slicer.
> Currently I am struck in a problem: how to create a label map volume in
> PVW, and need help from ParaView developers.  This email is long and I
> really appreciate your time reading it.
>
> To do PDF segmentation in Slicer, it requires at least two volumes: the
> input volume (the image to be segmented) and a label map volume roughly outlining
> the structures to be segmented.
>
> In Slicer, the label map volume can be created using the “Paint” editor,
> (check step 5
> http://public.kitware.com/Wiki/TubeTK/InteractivePDFSegmenter#Tutorial_Steps).
> But Midas only has a slice viewer supported by PVW python client. So I want
> to know how to create the label map volume using PVW. Here are my current
> thoughts:
>
> step 1) let’s assume there are only two labels in the label map. All
> pixels are labelled as 0 (background) initially. When a user starts
> painting slice(s),  I can manually track mouse movements, capture the
> co-ords, map them to pixels and label these pixels as 1. Can PVW get such
> collection of pixels automatically?
>
> step 2) how can I create the label map volume using the input volume and
> the above label information using PVW?  I guess I have to create the label
> map volume from scratch using VTK. But I also don’t know how to do it in
> VTK.  Or there may exist an easier solution in PVW?
>
>
>  step 3) suppose I have got the label map volume in a vtkImageData
> object. Do I need to convert it to a proxy object, or it can be saved to an
> image file (.mha or .nrrd) directly via PVW?
>
> Thanks a lot. I would very much appropriate any feedback or instructions
> for any steps.
>
>
> Yuzheng
>
> --
> Yuzheng Zhou
> R & D Engineer
> Kitware Inc.
> (919) 869-8857
>
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>
>
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