[vtkusers] Threshold

[Paulo Neves]

Dear vtk users.

I am trying to perform a simple threshold over a 3D data set obtained from DICOM images.

I can render the data set before and after the threshold. Tried 2 approaches:

- vtkImageThreshold
vtkSmartPointer<vtkImageThreshold> threshold = vtkSmartPointer<vtkImageThreshold>::New();
	threshold->ThresholdBetween(700, 3000);
	threshold->SetInputConnection(reader->GetOutputPort());
	threshold->ReplaceInOn();
	threshold->Update();

I get exactly the same scalar values (range is between -2047 and 6143), so no threshold is actually made...

- and vtkThreshold
in this case I get an unstructured grid, which I don't want to since I need data set to apply further processing.

Any ideas why vtkImageThreshold is not working?

Kind regards,

___________________________________________________________________
Paulo Alexandre Neves
Escola Superior de Tecnologia de Castelo Branco
Unidade Técnico-Cientifica de Informática
http://di.est.ipcb.pt
E-mail: pneves at ipcb dot pt




Instituto de Telecomunicações (IT)
E-mail: pneves at co dot it dot pt

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