[vtkusers] Creating a 3DImageData from slices
Romuald BERTRAND
beromuald at wanadoo.fr
Wed May 28 10:50:21 EDT 2008
There is my code :
vtkImageAppend* transfo3D = vtkImageAppend::New();
transfo3D->SetAppendAxis(2);
for( int i=0; i<lastOne; i++)
{
transfo3D->AddInput(img[i]);
}
transfo3D->Update();
double range[2];
transfo3D->GetOutput()->GetPointData()->GetScalars()->GetRange(range);
viewer->SetInputConnection(transfo3D->GetOutputPort());
viewer->SetSlice(lastOne);
viewer->SetColorWindow(range[1] - range[0]);
viewer->SetColorLevel((range[0]+range[1])*0.5);
Refresh(); //wxWidgets method
It says the range is 0, 0, and when I want to see the dimension, x=0, y=0, z=0. I don't understand why, but there is no data.
When I display "img" slice by slice, the images appears in the screen.
> Message du 28/05/08 16:29
> De : "Amy Squillacote"
> A : "Romuald BERTRAND"
> Copie à : vtkusers at vtk.org
> Objet : Re: [vtkusers] Creating a 3DImageData from slices
>
> What is the scalar range of your data? The color window and level need
> to be set based on this range. You can get the scalar range as follows.
>
> transfo3D->Update();
> double range[2];
> transfo3D->GetOutput()->GetPointData()->GetScalars()->GetRange(range);
>
> Try setting the color window to "range[1] - range[0]". Set the color
> level to the middle of that range: "(range[0]+range[1])*0.5".
>
> - Amy
>
> Romuald BERTRAND wrote:
> >
> > I'm not very familiar with vtk, I have tried this :
> >
> > / viewer->SetInputConnection(transfo3D->GetOutputPort());
> > viewer->SetSlice(lastOne);
> > viewer->SetColorWindow(2000);
> > viewer->SetColorLevel(1000);
> >
> > Refresh();/
> >
> >
> >
> >
> >
> > > Message du 28/05/08 16:15
> > > De : "Amy Squillacote"
> > > A : "Romuald BERTRAND"
> > > Copie à : vtkusers at vtk.org
> > > Objet : Re: [vtkusers] Creating a 3DImageData from slices
> > >
> > > How are you displaying the volume?
> > > - Amy
> > >
> > > Romuald BERTRAND wrote:
> > > >
> > > > Hi Amy,
> > > >
> > > > Thanks for your help, but I have already tried this loop, just
> > after
> > > > sending the email. And when I display the volume, it doesn't
> > appear
> > > > (just a black screen). Do you know why?
> > > >
> > > > Thanks for your help,
> > > >
> > > > Romu
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > > Message du 28/05/08 15:44
> > > > > De : "Amy Squillacote"
> > > > > A : "Romuald BERTRAND"
> > > > > Copie à : vtkusers at vtk.org
> > > > > Objet : Re: [vtkusers] Creating a 3DImageData from slices
> > > > >
> > > > > Hi Romu,
> > > > >
> > > > > Try replacing your "for" loop with the following. (You also
> > > > won't need
> > > > > "int importPort(0);".)
> > > > >
> > > > > for (int i = 0; i < lastOne; i++)
> > > > > {
> > > > > transfo3D->AddInput(img[i]);
> > > > > }
> > > > >
> > > > > - Amy
> > > > >
> > > > > Romuald BERTRAND wrote:
> > > > > >
> > > > > > Hi, my code is :
> > > > > >
> > > > > > / vtkImageAppend* transfo3D = vtkImageAppend::New();
> > > > > >
> > > > > > int inputPort(0);
> > > > > >
> > > > > > for( int i=0; i
> > > > > > {
> > > > > > transfo3D->SetInput(inputPort, img[i]);
> > > > > >
> > > > > > inputPort++;
> > > > > > }
> > > > > >
> > > > > > transfo3D->SetAppendAxis(2);
> > > > > >
> > > > > > viewer->SetInputConnection(transfo3D->GetOutputPort());
> > > > > > viewer->SetSlice(lastOne);
> > > > > > viewer->SetColorWindow(2000);
> > > > > > viewer->SetColorLevel(1000);
> > > > > >
> > > > > > Refresh();
> > > > > > /
> > > > > > I think there is a lot of errors, but I don't know how to use
> > > > this class.
> > > > > >
> > > > > > Thanks for help
> > > > > >
> > > > > > Romu
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > > Message du 27/05/08 16:36
> > > > > > > De : "Amy Squillacote"
> > > > > > > A : "Romuald BERTRAND"
> > > > > > > Copie à : vtkusers at vtk.org
> > > > > > > Objet : Re: [vtkusers] Creating a 3DImageData from slices
> > > > > > >
> > > > > > > Hi Romu,
> > > > > > >
> > > > > > > Please post source code showing how you are trying to use
> > > > > > > vtkImageAppend. In order for anyone on this list to help you
> > > > > > track down
> > > > > > > the problem, we need to see source code showing what you are
> > > > doing.
> > > > > > >
> > > > > > > - Amy
> > > > > > >
> > > > > > > Romuald BERTRAND wrote:
> > > > > > > >
> > > > > > > > Hi Amy, thanks for your answer,
> > > > > > > >
> > > > > > > > But I have tried to make an algorithm with
> > "vtkImageAppend",
> > > > > > and I
> > > > > > > > don't arrived.
> > > > > > > > Someone know how can I use this class?
> > > > > > > > I have severals 2D vtkImageData objects (the slices).
> > > > > > > >
> > > > > > > > Thanks a lot for answers.
> > > > > > > >
> > > > > > > > Romu
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > > Message du 22/05/08 17:10
> > > > > > > > > De : "Amy Squillacote"
> > > > > > > > > A : "Romuald BERTRAND"
> > > > > > > > > Copie à : vtkusers at vtk.org
> > > > > > > > > Objet : Re: [vtkusers] Creating a 3DImageData from
> > slices
> > > > > > > > >
> > > > > > > > > Hi Romu,
> > > > > > > > >
> > > > > > > > > Are the slices already loaded in VTK (i.e., multiple 2D
> > > > > > > > vtkImageData
> > > > > > > > > objects), or are you reading the slices from files?
> > > > > > > > >
> > > > > > > > > If they're already 2D vtkImageData objects, take a
> > look at
> > > > > > > > > vtkImageAppend
> > > > > > > > >
> > > > (http://www.vtk.org/doc/nightly/html/classvtkImageAppend.html).
> > > > > > > > If you
> > > > > > > > > have X-Y slices, then the "append axis" should be the Z
> > > > axis.
> > > > > > > > >
> > > > > > > > > If you're reading the slices from files, subclasses of
> > > > > > > > vtkImageReader2
> > > > > > > > >
> > > > (http://www.vtk.org/doc/nightly/html/classvtkImageReader2.html)
> > > > > > > > will
> > > > > > > > > handle this for you. You can pass in either a list of
> > > > file names
> > > > > > > > or a
> > > > > > > > > file pattern to tell the reader how to get the data
> > files.
> > > > > > > > >
> > > > > > > > > - Amy
> > > > > > > > >
> > > > > > > > > Romuald BERTRAND wrote:
> > > > > > > > > >
> > > > > > > > > > Hi all,
> > > > > > > > > >
> > > > > > > > > > Someone know how creating a 3DImageData from 2D
> > slices?
> > > > > > > > > > Thanks for answers,
> > > > > > > > > >
> > > > > > > > > > Romu
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > >
> > > > > >
> > > >
> > ------------------------------------------------------------------------
> > > > > > > > > >
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> > > > > > > > > >
> > > > > > > > >
> > > > > > > > > --
> > > > > > > > > Amy Squillacote Phone: (256) 726-4839
> > > > > > > > > Computer Scientist Fax: (256) 726-4806
> > > > > > > > > CFD Research Corporation Web: http://www.cfdrc.com
> > > > > > > > > 215 Wynn Drive, Suite 501
> > > > > > > > > Huntsville, AL 35805
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > Amy Squillacote Phone: (256) 726-4839
> > > > > > > Computer Scientist Fax: (256) 726-4806
> > > > > > > CFD Research Corporation Web: http://www.cfdrc.com
> > > > > > > 215 Wynn Drive, Suite 501
> > > > > > > Huntsville, AL 35805
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > > --
> > > > > Amy Squillacote Phone: (256) 726-4839
> > > > > Computer Scientist Fax: (256) 726-4806
> > > > > CFD Research Corporation Web: http://www.cfdrc.com
> > > > > 215 Wynn Drive, Suite 501
> > > > > Huntsville, AL 35805
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > > --
> > > Amy Squillacote Phone: (256) 726-4839
> > > Computer Scientist Fax: (256) 726-4806
> > > CFD Research Corporation Web: http://www.cfdrc.com
> > > 215 Wynn Drive, Suite 501
> > > Huntsville, AL 35805
> > >
> > >
> > >
> > >
> >
>
> --
> Amy Squillacote Phone: (256) 726-4839
> Computer Scientist Fax: (256) 726-4806
> CFD Research Corporation Web: http://www.cfdrc.com
> 215 Wynn Drive, Suite 501
> Huntsville, AL 35805
>
>
>
>
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