[vtkusers] How to visualize principal components on dataset

[Dominik Szczerba]

Oh sure it is possible. You can animate the contour moving by changing
the isovalue (dont forget to call Update() somewhere) and dumping movie
frames (I recommend ffmpeg). Just read the relevant documentation
(contour, movie writer). Alternatively, employ Paraview for fast results.
--DS

Arne Hansen wrote:
> Well, yes i have distance maps. But my plan is to extract only a certain
> level of this map ie. the zero levelset. This i can do in matlab. But I
> want to do this for a series of levelsets, since i am varying the
> principal modes.
> So I actually need to find out how i can save like a series of 3D
> frames, so that i can show an animation of these in VTK with an
> isosurface. Is this possible?
>  
> Thank you
>  
> 2007/1/4, Dominik Szczerba <domi at vision.ee.ethz.ch
> <mailto:domi at vision.ee.ethz.ch>>:
> 
>     So what is your data.
>     If you need to visualize different level sets of a distance map then a
>     few contourings will do.
>     --DS
> 
>     Arne Hansen wrote:
>     > Hello. I have binary shapes, which i have aligned and transformed into
>     > signed distance maps. I have then made a mean distance map, and
>     created
>     > a set of offset functions(offset from mean). Using these offset
>     > functions i made a Principal component analysis to capture
>     variation. My
>     > next task is to visualize my 3D meanshape in VTK, and its
>     > differentprincipal modes, where i multiply from 1 to 3 standard
>     devians
>     > on each mode, to see how the shape deforms.
>     >
>     >
>     > Can anybody give me a hint as of how to visualize this in VTK?
>     > Thank you very much :)
>     >
>     >
>     >
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