[vtkusers] Does vtkImageBlend or vtkAppendPolyData generate 3D / Volumetric representation of 2D Image Data or PolyData respectively

[Cory Quammen]

Is your application and VTK built in 32-bit or 64-bit mode? You should
always build in 64-bit mode when working with image data like this because
typically the 32-bit address space is not large enough to hold the data.
What operating system are you running?

On Mon, Jul 20, 2015 at 6:22 PM, Neel007 <sayanmaity.10 at gmail.com> wrote:

> Dear Cory,
>
> Please disregard the previous post. I was doing a silly mistake of not
> including the "threshold->Update();" statement thus the threshold operation
> wasn't performing. After including the statement the vtkThreshold is
> working
> and giving me outputs: Code & plots are attached:
>
> *Code:*
>   // Start by loading some data.
>    vtkSmartPointer<vtkTIFFReader> reader =
>     vtkSmartPointer<vtkTIFFReader>::New();
>   reader->SetFileNameSliceOffset(1);
>   reader->SetFileNameSliceSpacing(1);
>
>
> reader->SetFilePattern("S:\\GSoC_2015_Implementation\\test_images\\2.%d.bspline.tif");
>   reader->SetDataExtent(0, 63, 0, 63, 1, 125);
>
>   reader->SetOrientationType(3);
>   reader->Update();
>
>   vtkSmartPointer<vtkThreshold> threshold =
> vtkSmartPointer<vtkThreshold>::New();
>   threshold->SetInputConnection(reader->GetOutputPort());
>   threshold->ThresholdByUpper(1);
>
>   //threshold->SetInputArrayToProcess(0, 0, 0,
> vtkDataObject::FIELD_ASSOCIATION_POINTS, "index");
>   threshold->Update();
>   vtkUnstructuredGrid* thresholdedPolydata = threshold->GetOutput();
>   std::cout << "There are " << thresholdedPolydata->GetNumberOfCells()
>             << " cells after thresholding." << std::endl;
>
>   //Visualization UnstructuredGrid after threshold
>
>
>   // Create a mapper and actor
>   vtkSmartPointer<vtkDataSetMapper> mapper =
>     vtkSmartPointer<vtkDataSetMapper>::New();
>
>   mapper->SetInputData(thresholdedPolydata);
>
>   vtkSmartPointer<vtkActor> actor =
>     vtkSmartPointer<vtkActor>::New();
>   actor->SetMapper(mapper);
>   actor->GetProperty()->SetColor(1.0, 0.0, 0.0);
>   actor->GetProperty()->SetRepresentationToWireframe();
>   actor->GetProperty()->SetLineWidth(5);
>
>   // Create a renderer, render window, and interactor
>   vtkSmartPointer<vtkRenderer> renderer =
>     vtkSmartPointer<vtkRenderer>::New();
>   vtkSmartPointer<vtkRenderWindow> renderWindow =
>     vtkSmartPointer<vtkRenderWindow>::New();
>   renderWindow->AddRenderer(renderer);
>   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>     vtkSmartPointer<vtkRenderWindowInteractor>::New();
>   renderWindowInteractor->SetRenderWindow(renderWindow);
>
>   // Add the actors to the scene
>   renderer->AddActor(actor);
>   //renderer->AddActor(sphereActor);
>   renderer->SetBackground(.1, .5, .8);; // Background color white
>
>   // Render and interact
>   renderWindow->Render();
>   renderWindowInteractor->Start();
>
> *Plot of Unstructured grid using vtkThreshold :*
>
> <http://vtk.1045678.n5.nabble.com/file/n5733002/vtkThreshold.png>
>
> /***** Issue****/ *But I am facing some memory related problem, I have
> total
> 551 images (series/ stack) out of which only 125 images are loading in my
> PC
> (16 GB memory installed)  while using vtkThreshold  anything more than that
> throwing error related Memory overloading, error window shown below. Please
> suggest me how to handle this memory allocation problem :*
>
> ""ERROR: In f:\vtk\vtk-6.2.0\common\core\vtkDataArrayTemplate.txx, line 142
> vtkIdTypeArray (0000000001C83C90): Unable to allocate 996245250 elements of
> size 8 bytes.
>
> <http://vtk.1045678.n5.nabble.com/file/n5733002/Capture.png>
>
>
>
> --
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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