[vtkusers] Writing renderwindow to an image

[Carlos Martínez Burgos]

OK, thanks.

It's a good solution at this moment. If somebody has another idea I will
apreciate it.

Thanks again.


On Thu, 4 Jul 2002, Mathieu Malaterre wrote:

> Hi Carlos,
>   You can use: vtkImageData::GetScalarComponentAsFloat
> See:
> http://public.kitware.com/VTK/doc/nightly/html/classvtkImageData.html#a56
> 
> As you just have 2 coordinates, use this way (in python):
> 
> m,n,o = image.GetOutput().GetDimensions()
> 
> for i in range(0, m):
>  for j in range(0, n):
>   val = image.GetOutput().GetScalarComponentAsFloat(i,j,0,0)
>   print(val),
>  print('\n'),
> 
> I'm not sure it's the best way...
> mathieu
> 
> Carlos Martínez Burgos wrote:
> 
> > Yes, this is the idea. I get an vtkImageData object from
> > vtkWindowToImageFilter output. Then I should get the pixel values from it.
> >
> > The problem is that I have never worked with images in VTK so I have
> > problems.
> >
> > Why this object has three components (x,y,z)? I think that this is because
> > an image are slices. Isn't it? If it is true, I supose that I have only
> > one slice from the window. Is this slice z=0?
> >
> > How can I get the pixels (rgb) values from the vtkImageData object? I
> > supose that this should be sufficient.
> >
> > Thanks again.
> >
> > On Thu, 4 Jul 2002, Mathieu Malaterre wrote:
> >
> > > Hi Carlos,
> > >    Why don't you use : vtkWindowToImageFilter.
> > > See:
> > > http://public.kitware.com/VTK/doc/nightly/html/classvtkWindowToImageFilter.html
> > >
> > > mathieu
> > >
> > > Carlos Martínez Burgos wrote:
> > >
> > > > Hi all.
> > > >
> > > > I'm working with Java and I have to make reports with the contents of
> > > > VTK's renderwindow. I need to do a copy from the renderwindow to an array
> > > > of bytes, to build the image and show it.
> > > >
> > > > Has somebody any idea of doing this? Could somebody help me?
> > > >
> > > > Thanks.
> > > >
> > > > --
> > > > ----------------------------------------------------------------------
> > > > Carlos Martínez Burgos      |     Instituto Tecnológico de Informática
> > > > Ingeniero Informático       |      Universidad Politécnica de Valencia
> > > > Tlf: +34 963877237          |                        Camí de Vera, S/N
> > > > cmarbur at iti.upv.es          |                   46071 Valencia - Spain
> > > > www.iti.upv.es/~cmarbur     |                           www.iti.upv.es
> > > > ----------------------------------------------------------------------
> > > >
> > > > _______________________________________________
> > > > This is the private VTK discussion list.
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> > >
> > > --
> > > Malaterre, Mathieu
> > > The John P. Robarts Research Institute
> > > Imaging Research Laboratories
> > > http://www.imaging.robarts.ca/~mmalat
> > >
> > >
> > >
> > > _______________________________________________
> > > This is the private VTK discussion list.
> > > Please keep messages on-topic. Check the FAQ at: <http://public.kitware.com/cgi-bin/vtkfaq>
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> > >
> >
> > --
> > ----------------------------------------------------------------------
> > Carlos Martínez Burgos      |     Instituto Tecnológico de Informática
> > Ingeniero Informático       |      Universidad Politécnica de Valencia
> > Tlf: +34 963877237          |                        Camí de Vera, S/N
> > cmarbur at iti.upv.es          |                   46071 Valencia - Spain
> > www.iti.upv.es/~cmarbur     |                           www.iti.upv.es
> > ----------------------------------------------------------------------
> 
> --
> Malaterre, Mathieu
> The John P. Robarts Research Institute
> Imaging Research Laboratories
> http://www.imaging.robarts.ca/~mmalat
> 
> 
> 

-- 
----------------------------------------------------------------------
Carlos Martínez Burgos      |     Instituto Tecnológico de Informática
Ingeniero Informático       |      Universidad Politécnica de Valencia
Tlf: +34 963877237          |                        Camí de Vera, S/N
cmarbur at iti.upv.es          |                   46071 Valencia - Spain
www.iti.upv.es/~cmarbur     |                           www.iti.upv.es
----------------------------------------------------------------------