[vtkusers] vtkSmoothPolyDataFilter

[Bryn Lloyd]

Check if you actually have a contour at the value(s), e.g. by looking at 
the number of points in the output of vtkContourFilter. My guess is your 
contour (polydata) is empty.

You can also check the data range of the image, something like:

GaussianSmooth.GetOutput().GetPointData().GetScalars().GetRange()

/Bryn





Gururajan wrote:
> Yup, you are right, i place an update in vtkImageGaussianSmooth, but
> even now, it hits me the same,
> 
> Thanks
> Guru
> 
> Dominik Szczerba wrote:
>> you probably missing Update() somewhere...
>>
>> Gururajan wrote:
>>> Hi all,
>>>
>>> On execution of my application, am getting below error. Ane one have
>>> any clue please,
>>>
>>> ERROR: In C:\martink\vtk42\VTK\Graphics\vtkSmoothPolyDataFilter.cxx,
>>> line 191
>>> vtkSmoothPolyDataFilter (0x0C702B08): No data to smooth!
>>>
>>> ERROR: In C:\martink\vtk42\VTK\Graphics\vtkPolyDataNormals.cxx, line 88
>>> vtkPolyDataNormals (0x0C702F68): No data to generate normals for!
>>>
>>> Thanks in advance
>>> Guru
>>>
>>>     vtkDICOMImageReader dicomreader = new vtkDICOMImageReader();
>>>        
>>> dicomreader.SetDirectoryName("/home/gururaj/MANIX/MANIX/CER-CT/AVEC
>>> I.V.");
>>>         dicomreader.Update();
>>>         double[] dataspacing = dicomreader.GetDataSpacing();
>>>         System.out.println(dataspacing[0] + ":" + dataspacing[1] +
>>> ":" + dataspacing[2]);
>>>     System.out.println("Patient Ka naam : " +
>>> dicomreader.GetPatientName());              vtkImageWriter writer =
>>> new vtkImageWriter();//vtkImageWriter::New()
>>>          writer.SetInput(dicomreader.GetOutput());
>>>          writer.SetFilePrefix("/home/gururaj/eclipse
>>> Project/SimpleVTK/SimpleVtk/Raw/dicom");
>>>          writer.SetFilePattern("%s%3d.raw");
>>>          writer.Write();
>>>                    vtkVolume16Reader v16 = new vtkVolume16Reader();
>>>          v16.SetDataByteOrderToLittleEndian();
>>>          v16.SetFilePrefix("/home/gururaj/eclipse
>>> Project/SimpleVTK/SimpleVtk/Raw/");
>>>          v16.SetFilePattern("%s%3d.dcm.raw");
>>>          v16.SetImageRange(0, 123);
>>>          v16.GetOutput().ReleaseDataFlagOn();
>>>          v16.SetDataSpacing(dicomreader.GetDataSpacing());
>>>          v16.SetDataDimensions(dicomreader.GetOutput().GetDimensions());
>>>          v16.Update();
>>>                   vtkImageGaussianSmooth GaussianSmooth = new
>>> vtkImageGaussianSmooth();
>>>           GaussianSmooth.SetInput(v16.GetOutput());
>>>           GaussianSmooth.SetDimensionality (3);
>>>           GaussianSmooth.SetStandardDeviations(0.0,4.0);
>>>           vtkContourFilter skinExtractor = new vtkContourFilter();
>>>          
>>> skinExtractor.SetInput((vtkDataSet)GaussianSmooth.GetOutput());
>>>              skinExtractor.SetValue(0, 500);
>>>           skinExtractor.Update();
>>>           vtkSmoothPolyDataFilter smoother=new
>>> vtkSmoothPolyDataFilter();
>>>           smoother.SetInput(skinExtractor.GetOutput());
>>>           smoother.SetNumberOfIterations(70);
>>>              vtkPolyDataNormals skinNormals = new vtkPolyDataNormals();
>>>           skinNormals.SetInput(smoother.GetOutput());
>>>              skinNormals.SetFeatureAngle(60.0);
>>>
>>>           vtkPolyDataWriter pdw=new vtkPolyDataWriter();
>>>           pdw.SetInput(skinNormals.GetOutput());
>>>           pdw.SetFileName("/home/gururaj/eclipse
>>> Project/SimpleVTK/SimpleVtk/CardiacCT/out.vtk");
>>>           pdw.Write();
>>>
>>>
>>>
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> 
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-- 
-------------------------------------------------
Bryn Lloyd
Computer Vision Laboratory
ETH Zürich, Sternwartstrasse 7
CH - 8092 Zürich, Switzerland
Tel: +41 44 63 26668
Fax: +41 44 63 21199
-------------------------------------------------