[Insight-users] How to smooth the segmented surface

[Xiaopeng Yang]

Thank you Jothy. I tried but still the stairs existed. Here is my code:

 

       vtkContourFilter *iso = vtkContourFilter::New();

       iso->SetInput(vtkImporter4->GetOutput());

       iso->ComputeScalarsOn();

       iso->SetValue(0,128.1);

 

       vtkSmartPointer<vtkWindowedSincPolyDataFilter> smoother =  

              vtkSmartPointer<vtkWindowedSincPolyDataFilter>::New();

 

       smoother->SetInputConnection(iso->GetOutputPort()); 

       smoother->SetNumberOfIterations(15);  

       smoother->BoundarySmoothingOn();   

       smoother->FeatureEdgeSmoothingOn();   

       smoother->SetFeatureAngle(120.0);   

       smoother->SetEdgeAngle(90.0);

       smoother->SetPassBand(0.001);   

       smoother->NonManifoldSmoothingOn();   

       smoother->NormalizeCoordinatesOn();   

       smoother->Update();

 

       vtkPolyDataMapper *isoMapper = vtkPolyDataMapper::New();

       isoMapper->SetInput(smoother->GetOutput());

       isoMapper->ScalarVisibilityOff();

 

       vtkActor *isoActor1 = vtkActor::New();

       isoActor1->SetMapper(isoMapper);

       isoActor1->GetProperty()->SetColor(1.0, 0.49, 0.25);

       isoMapper->Delete();

       ren_L->AddActor(isoActor1);

       isoActor1->Delete();

 

Maybe the parameter are not properly set?

 

Thanks,

Xiaopeng

From: Jothybasu Selvaraj [mailto:jothybasu at gmail.com] 
Sent: Tuesday, March 20, 2012 6:44 PM
To: Xiaopeng Yang
Cc: insight-users at itk.org
Subject: Re: [Insight-users] How to smooth the segmented surface

 

If you are visualizing it with vtk, run vtkWindowedSincPolyDataFilter filter on it.

Jothy

On Tue, Mar 20, 2012 at 6:21 AM, Xiaopeng Yang <yxp233 at postech.ac.kr> wrote:

Hi,

 

Here I attach an image of the segmented 3D liver. You can see stairs in the image. How to remove the stairs and make the image look like continuous and smooth?

 

http://uploadingit.com/file/ <http://uploadingit.com/file/zvg7xr2jjxmbanxe/Liver.png> ​zvg7xr2jjxmbanxe/Liver.png

 

Thanks a lot!

Xiaopeng

From: insight-users-bounces at itk.org [mailto:insight-users-bounces@ <mailto:insight-users-bounces at itk.org> ​itk.org] On Behalf Of Xiaopeng Yang
Sent: Tuesday, March 20, 2012 11:17 AM
To: insight-users at itk.org
Subject: [Insight-users] How to smooth the segmented surface

 

Dear Users,

 

I have tried to segment the liver from 5 mm CT slices. When I tried to visualize the segmented liver in 3D, I found that the surface of the 3D liver was discrete, just like stairs. I guess that is because of the 5 mm interval between CT slices. Do you guys have any good idea how to make the 3D surface of the liver look continuous and smooth?

 

Thanks,

Xiaopeng


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-- 

Jothy

 

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