[vtkusers] an odd question about a plate which behind the actor

[David Gobbi]

The vtkConnectivityFilter can remove unwanted geometry like that plate.

   David


On Thu, Apr 1, 2010 at 8:29 AM, Jothybasu K Selvaraj <jothybasu at gmail.com>wrote:

> What I think is that the plate/thin slab appearing should be due to having
> similar scalar value as the brain. Verify your dicom images using a dicom
> viewer first and ensure that no plate are there in the original image.In
> most of the medical images there appears patient rest uesd while scanning.
>
> Jothy
>
> On Thu, Apr 1, 2010 at 3:13 PM, 朱文武 <cool.wenwu at gmail.com> wrote:
>
>>
>> Dear all and David,
>>      Thanks!   Firstly, I like to say sorry to david, it's my careless and
>> mistake !   Now， i present my problem again ！ thanks for all any help !
>>
>> i also do not know why the image was disappeared.   I don't know whether
>> the problem is related to the code. Because the same code can applied in
>> other images(dataset), and the problem did not occurred. The related code
>> was presented:
>>
>>    m_read = new vtkBMPReader();
>>    skinExtractor = vtkMarchingCubes::New();//
>>    skinNormals = vtkPolyDataNormals::New();//
>>     triangle=vtkTriangleFilter::New();//
>>     deci=vtkDecimatePro::New();/
>>     smoother=vtkSmoothPolyDataFilter::New();//
>>     skinMapper = vtkPolyDataMapper::New();//
>>     skin = vtkActor::New();
>>
>>     this->m_read->Update();//read the bmp image
>>     this->skinExtractor->SetInputConnection(m_read->GetOutputPort());
>>     this->skinExtractor->SetValue(0,threshshold);
>>
>> this->skinNormals->SetInputConnection(skinExtractor->GetOutputPort());/
>>     this->skinNormals->SetFeatureAngle(60.0);//
>>     this->triangle->SetInputConnection(skinNormals->GetOutputPort());//
>>     this->deci->SetInputConnection(triangle->GetOutputPort());//
>>     this->deci->SetTargetReduction(predigestion);//
>>     this->deci->PreserveTopologyOn();//
>>     this->smoother->SetInputConnection(deci->GetOutputPort());//
>>     this->smoother->SetNumberOfIterations(smoothness);//
>>     this->skinMapper->SetInputConnection(smoother->GetOutputPort());//
>>     this->skinMapper->ScalarVisibilityOff();//
>>     this->skinMapper->SetColorModeToMapScalars();
>>     this->skinMapper->SetScalarRange(-1,1);
>>
>>
>>     // Link the actor
>>
>>     this->skin->SetMapper(this->skinMapper);
>>     this->skin->GetProperty()->SetColor(0.94,0.83,0.45);
>>
>>
>> The image of the result:
>>
>> [image: 5.bmp]
>>
>> Thanks,
>> WenWu
>>
>>
>> On Wed, Mar 31, 2010 at 9:33 AM, David Doria <daviddoria+vtk at gmail.com<daviddoria%2Bvtk at gmail.com>
>> > wrote:
>>
>>> On Tue, Mar 30, 2010 at 9:08 PM, 朱文武 <cool.wenwu at gmail.com> wrote:
>>>
>>>>
>>>> Why no people help me ? Is this question too easy?
>>>> I'm waiting!
>>>>
>>>
>>> I didn't see an attached image that you said you sent. Also, please post
>>> the smallest compilable code that demonstrates your problem.
>>>
>>> Thanks,
>>>
>>> David
>>>
>>
>>
>>
>>
>>
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>
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