[vtkusers] Threshold - problem solved

[Paulo Neves]

Dear vtk users,

Just found out the problem. 

- Code needed:
threshold->ReplaceOutOn();

- Code removed:
threshold->ReplaceInOn();

Now values are from 0 to 3000 as expected.

Best regards,

> 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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