[vtkusers] conversion of imagedata to poly data

[Robert Klimek]

Thanks for the reply, but no, I'm working with 2D data; nothing about what I'm 
doing is 3D. Basically here's what I'm trying to do. I read single tiff file 
(a 2D image). I do some 2D image processing by executing the Canny edge 
filter. You can see it at:

http://public.kitware.com/cgi-bin/cvsweb.cgi/~checkout~/VTK/Graphics/Testing/Tcl/Canny.tcl

The output of this filter is a vtkSubPixelPositionEdgels data but if I feed it 
into vtkPolyDataMapper2D then I get polydata output.

Now I'm just trying to put it back in a 2D vtkImageData format so that I can 
display it inside my Python/wxPython program (if I can convert the output of 
the filter to vtkImageData then I'm home free, because I know how to convet 
vtkImageData to wxImage format).

I've tried converting vtkSubPixelPositionEdgels to vtkImageData to no avail. 
I've also tried converting the vtkPolyDataMapper output to vtkImageData to no 
avail. BTW, the vtkShepardMethod appears to work with only 3D data.

Bob



On Monday October 21 2002 7:54 pm, anast.jm at pg.com wrote:
> I'm assuming you want 3D imagedata or you could just use the output of a
> render window. I would think you could resample the polydata points onto a
> structured points set with vtkShepardMethod...john
>
>
>
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>
>
> From: Robert Klimek <klimek at grc.nasa.gov>@public.kitware.com on 10/21/2002
> 03:32 PM GMT
>
>       Robert Klimek <klimek at grc.nasa.gov>           To:  
> vtkusers at public.kitware.com @public.kitware.com           Cc:    (bcc: John
> Anast-JM/PGI) Subject:      Re: [vtkusers] conversion of imagedata to poly
> data Sent by:
>         vtkusers-admin at public.kitware.com
>                       10/21/2002 11:32 AM
>     Please respond to klimek at grc.nasa.gov
>
>
>
>
>
> Hi,
>
> Related to this conversion, does anyone know how to go the other way - from
> polydata to imagedata? I've searched the archives as well as the examples
> and I can't find any procedure (or a function) that would do it.
>
> Best regards,
> Bob
>
> On Monday October 21 2002 7:01 pm, anast.jm at pg.com wrote:
> > in vtk4x see the example
> >
> > /Examples/VisualizationAlgorithms/Tcl/imageWarp.tcl
> >
> > ...john
> >
> >
> >
> >  Internet Mail Message
> >  Received from host:      public.kitware.com
> >  [24.97.130.19]
> >
> >
> >
> > From: "cspl" <affable at hd2.dot.net.in>@public.kitware.com on 10/21/2002
> > 07:34 PM ZE5B
> >
> >              "cspl" <affable at hd2.dot.net.in>           To:
> > <vtkusers at public.kitware.com> @public.kitware.com           Cc:    (bcc:
> > John Anast-JM/PGI) Subject:      [vtkusers] conversion of imagedata to
> > poly data
> >  Sent by:  vtkusers-admin at public.kitware.com
> >                          10/21/2002 10:04 AM
> >
> >
> >
> >
> >
> >
> >
> > dear friends,
> >
> > I want how to convert Imagedata to polydata.Please  give me suggestion.
> >
> > Thanking  you,
> > Regards,
> > satyanarayana
> >
> >
> >
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