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

[朱文武]

David,
    thanks firstly!  I began to know something about the use of the
vtkConnectivityFilter. However, the current problem is that i can not find
any line or other pot in the original image in that place. ( you can see the
image in the email which i reply to jothy. ), I do not know how the plate
occurred !  Could you provide more details?

Ｔｈａｎｋｓ，
Ｗｅｎｗｕ


On Thu, Apr 1, 2010 at 10:36 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> 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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-- 
祝
工作愉快，身体健康！
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