[vtkusers] Dose mapping on a CT image

[Abhishek Gupta]

Hello Jothy,

I am using following code to generate contours:
---------------------------------------------------------------------------------
       //Set vktImage.
vtkImageData* _vtkImage = vtkImageData::New();
_vtkImage->SetDimensions(dfData->cols,dfData->rows,1);
double spacing[3] = { 2.5,2.5,1.0 }; // TODO: fix me
_vtkImage->SetSpacing(spacing);
_vtkImage->GetPointData()->SetScalars(scalars);
/*double bounds[6];
_vtkImage->GetBounds(bounds);*/
_vtkImage->Update();
_vtkImage->Print(cerr);

// Generate contours.
vtkContourFilter* contour=vtkContourFilter::New();
contour->SetInput(_vtkImage);
contour->GenerateValues(1,level,level);
contour->Update();
contour->Print(cerr);
contour->GetOutput()->GetPoints()->Print(cerr);
int numOfPoints=contour->GetOutput()->GetPoints()->GetNumberOfPoints();
if(numOfPoints>0)
{
 for(int i=0;i<numOfPoints;i++)
{
dosePlotPoint p;//=new dosePlotPoint();
p.x=contour->GetOutput()->GetPoints()->GetPoint(i)[0];
p.y=contour->GetOutput()->GetPoints()->GetPoint(i)[1];
outPoints.push_back(p);
}
}
--------------------------------------------------------------------------------------------------
I wish to obtain contour points in a manner that I can draw a path through
those points.

Regards,
Abhishek Gupta.

On Wed, Oct 10, 2012 at 7:29 PM, Jothybasu Selvaraj <jothybasu at gmail.com>wrote:

> I don't know how you are obtaining the points form vtkContourFilter. What
> exactly do you want to do?
>
> I think; vtkCOntourFilter can generate multiple contour lines depending on
> the GenerateValues() parameters.
>
> On Wed, Oct 10, 2012 at 2:52 PM, abhishek <abhishek at meddiff.com> wrote:
>
>> Dear Jothy,
>>
>> I applied your suggestions in my code and spacing problem seems to be
>> addressed. Now I have plotted a path over the points generated by contour
>> filter. Please see the attached image.
>>
>> I saw the output of vtkContourFilter and it is returning points for
>> vtkLines. How can I get only outline points?
>>
>> Regards,
>> Abhishek.
>>
>> *Untitled.png* (79K) Download Attachment<http://vtk.1045678.n5.nabble.com/attachment/5716583/0/Untitled.png>
>>
>> ------------------------------
>> View this message in context: Dose mapping on a CT image<http://vtk.1045678.n5.nabble.com/Dose-mapping-on-a-CT-image-tp5716583.html>
>> Sent from the VTK - Users mailing list archive<http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html>at Nabble.com.
>>
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>
>
> --
> Jothybasu Selvaraj
> PhD Student
> University of Liverpool
> UK
>
>
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