[vtkusers] How to visualize principal components on dataset

[Arne Hansen]

Do you think you can show me an example of this?
It would probably be best if i could save my matlab data in a vtk-file, and
then load this.
Do you think this is a good approach?

Thank you


2007/1/4, Dominik Szczerba <domi at vision.ee.ethz.ch>:
>
> 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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