[vtkusers] How to Get rendered Volume Slices?

[朱映华]

hi Italo,
Thanks for your help.
i find the vtkContourFilter class only generate the isosurface volume.
the attachment is i do the test(use you give me code) result.
i want to  generated  2D images of each 6° degree around the *MIP *volume.
i don't know if VTK has MIP filter like vtkContourFiler. so i can use than
to generate MIP volume .

Thanks.
best regards.
Yinghua.

2010/9/19 Italo Ribeiro <italo.ribeiro at gmail.com>

> If i understand you want create 3D model of slice? Try this:
>
> vtkDICOMImageReader *reader = vtkDICOMImageReader::New();
>     reader->SetDirectoryName("C:/cranio");
>     reader->Update();
>
>  vtkContourFilter *skinExtractor = vtkContourFilter::New();
>   skinExtractor->SetInputConnection(reader->GetOutputPort());
>   skinExtractor->SetValue(0, 500); //skin human
>
>   vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
>   skinNormals->SetInputConnection(skinExtractor->GetOutputPort());
>   skinNormals->SetFeatureAngle(60.0);
>
>   vtkStripper *skinStripper = vtkStripper::New();
>   skinStripper->SetInputConnection(skinNormals->GetOutputPort());
>
>   vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
>   skinMapper->SetInputConnection(skinStripper->GetOutputPort());
>   skinMapper->ScalarVisibilityOff();
>
>   vtkActor *skin = vtkActor::New();
>   skin->SetMapper(skinMapper);
>
> vtkRenderer *renderer2 = vtkRenderer::New();
>     renderer2->SetViewport(0.5, 0.0, 1.0, 0.5);
>     renderer2->SetBackground(0.0, 0.0, 0.0);
>     renderWindow->AddRenderer(renderer2);
>
>   renderer2->AddActor(skin);
>
> bye.
>
> 2010/9/19 陆阳 <thuluyang at gmail.com>
>
>  i have the exatly desire as finsher has...
>> i am waiting for the answeer to...
>> best regards
>>
>> 2010/9/19 finsher <zhuyinghua01 at gmail.com>
>>
>>
>>> Hi all,
>>> I need to get the Maximum intensity projection(MIP) slices.
>>> so I have a series of MR images.  I use these series to do MIP(or volume
>>> render etc...).  when MIP rendering completed  I need to get the rendered
>>> slices. if i use vtkResliceImage dor  imageplanewidget s the input data
>>> is
>>> the voxel raw data, i got the  slices is the original image slices, not
>>> cut
>>> from MIP volume slices.
>>> so could you help me how to get the correct slices?
>>>
>>> best regards.
>>>
>>> and below is my code :
>>>
>>> //step 1: read raw image series data
>>> vtkVolume16Reader* v16 =  vtkVolume16Reader::New();
>>> v16->SetFilePrefix("d:\\aaa\\new\\a");
>>> ...
>>> v16->Update();
>>>
>>> //step.2: do MIP
>>> vtkPiecewiseFunction *opacityTransferFunc = vtkPiecewiseFunction::New();
>>> opacityTransferFunc->AddPoint(0.0, 0.0);
>>> ...
>>> vtkColorTransferFunction *colorTransferFunc =
>>> vtkColorTransferFunction::New();
>>> colorTransferFunc->AddRGBPoint(0.0, 0.0, 0.0, 0.0);
>>> ...
>>> volumeProperty = vtkVolumeProperty::New();
>>> volumeProperty->SetColor(colorTransferFunc);
>>> volumeProperty->SetScalarOpacity(opacityTransferFunc);
>>>
>>> //step 3: set mip function and create volume data
>>> vtkVolumeRayCastMIPFunction *mipFunc =
>>> vtkVolumeRayCastMIPFunction::New();
>>> volumeMapper = vtkVolumeRayCastMapper::New();
>>> volumeMapper->SetVolumeRayCastFunction(mipFunc);
>>> volumeMapper->SetInput(v16->GetOutput());
>>> volume = vtkVolume::New();
>>> volume->SetMapper(volumeMapper);
>>> volume->SetProperty(volumeProperty);
>>> volume->Update();
>>>
>>> //step.4: renderer volume show rendered window
>>> render->AddVolume(volume);
>>> renderWindow->Render();
>>> ...
>>>
>>> //setp.5: get MIP slices
>>> vtkImagePlaneWidget* planeWidget = vtkImagePlaneWidget::New();
>>> ...
>>> planeWidget->SetInput(v16->GetOutput()); <----i think this input data
>>> could
>>> not be correct. but i don't know how ...
>>>
>>> //step.6 display the slices
>>> imageViewer2->SetInput(planeWidget->GetResliceOutput());
>>> renderWindowInteractor->Initialize();
>>> imageViewer2->Render();
>>> renderWindowInteractor->Start();
>>> ....
>>> --
>>> View this message in context:
>>> http://vtk.1045678.n5.nabble.com/How-to-Get-rendered-Volume-Slices-tp2845243p2845243.html
>>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>> _______________________________________________
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>>
>>
>>
>> --
>> 陆阳
>> 清华大学医学院生物医学工程系
>> Yang Lu
>> Department of Biomedical Engineering,
>> School of Medicine, Tsinghua University
>>
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>>
>
>
> --
> Ítalo Mendes
> ogre.irados.org
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
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