[vtkusers] strange output, any advice please

[Bill Lorensen]

What is the problem you are trying to solve?

On Thu, Dec 17, 2009 at 9:10 AM, InfoSeekerr
<ali.mahmoud.habib at gmail.com> wrote:
>
> it should be like the photo at the following link
> http://www.iue.tuwien.ac.at/phd/fleischmann/img346.gif
>
> do u have any suggestion regards that
>
> Best regards
>
> David Doria-2 wrote:
>>
>> On Thu, Dec 17, 2009 at 8:08 AM, Ali Habib <ali.mahmoud.habib at gmail.com>
>> wrote:
>>> Dear Bill,
>>> I used VtkDelunary3D instead of 2D, and I used before reconstruction
>>> series
>>> of fillters to decrease the dataset ,attached is the output
>>>
>>> The code I used is :
>>>
>>> vtkDICOMImageReader v16 =  vtkDICOMImageReader::New();
>>>
>>>             v16->SetDirectoryName(@"D:\work\Master
>>> Degree\DataSet\case2\DICOM\PA1\ST1\SE2");
>>>
>>>             v16->SetDataOrigin(2, 2, 1);
>>>
>>>             v16->Update();
>>>
>>>             /////////////////////Pre processing
>>>
>>>             // STEP 1:
>>>
>>>             vtkImageShrink3D VIS =  vtkImageShrink3D::New();
>>>
>>>             VIS->SetInputConnection(v16->GetOutputPort());
>>>
>>>             VIS->SetShrinkFactors(2, 2, 1);
>>>
>>>             VIS->Update();
>>>
>>>             // STEP 2:
>>>
>>>             vtkImageThreshold VIT =  vtkImageThreshold::New();
>>>
>>>             VIT->SetInputConnection(VIS->GetOutputPort());
>>>
>>>             VIT->ThresholdByLower(200);
>>>
>>>             VIT->ThresholdByUpper(2000);
>>>
>>>             VIT->Update();
>>>
>>>             //step3
>>>
>>>             vtkImageGaussianSmooth VIG = vtkImageGaussianSmooth::New();
>>>
>>>             VIG->SetInputConnection(VIS->GetOutputPort());
>>>
>>>             VIG->SetStandardDeviation(1.4, 1.4, 1.4);
>>>
>>>             VIG->Update();
>>>
>>>
>>>
>>>             //////////////// Create the 3d volume /////////////////
>>>
>>>
>>>
>>>             vtkMarchingCubes skinExtractor =  vtkMarchingCubes::New();
>>>
>>>             skinExtractor->GetOutput()->ReleaseDataFlagOff();
>>>
>>>             skinExtractor->SetInputConnection(VIG->GetOutputPort());
>>>
>>>             skinExtractor->SetValue(0, 500);
>>>
>>>             skinExtractor->ComputeGradientsOn();
>>>
>>>             skinExtractor->Update();
>>>
>>>
>>>
>>>             vtkTriangleFilter VTF =  vtkTriangleFilter::New();
>>>
>>>             VTF->SetInputConnection(skinExtractor->GetOutputPort());
>>>
>>>             VTF->GetOutput()->ReleaseDataFlagOff();
>>>
>>>             VTF->Update();
>>>
>>>
>>>
>>>             vtkDelaunay3D stripper =  vtkDelaunay3D::New();
>>>
>>>             stripper->SetInputConnection(VTF->GetOutputPort());
>>>
>>>             stripper->GetOutput()->ReleaseDataFlagOff();
>>>
>>>             stripper->Update();
>>>
>>>
>>>
>>>             // Create Mapper
>>>
>>>            vtkDataSetMapper skinMapper =  vtkDataSetMapper::New();
>>>
>>>            skinMapper->SetInputConnection(stripper->GetOutputPort());
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> That is the expected output of Delaunay3D. I never understood what it
>> would be used for myself. It is very "convex-hull-ish".
>>
>> I'm not exactly sure what the output of this example is, and I'm also
>> not very familiar with DICOM, but maybe you can look at:
>> http://www.vtk.org/Wiki/VTK/Examples/Medical/Cxx/GenerateModelsFromLabels
>>
>> (Bill - we should try to add images to a lot of these as we have time).
>>
>> Thanks,
>>
>> David
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>
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