[vtkusers] problem in combining two mhd images

[Bill Lorensen]

As the error message reports, image blend requires that both images be of
the same tip. In your case, one image is double and the other if unsigned
short.

Use vtkImageCast to cast the ushort image to double. then pass that to
ImageBlend.

On Thu, Oct 18, 2012 at 8:36 AM, Raviteja, Allaparthi <
Allaparthi.Raviteja at philips.com> wrote:

>  Hi,****
>
> I am new to VTK and I have a problem in combining two “mhd” images . The
> code and the error are as follows.****
>
> #include <vtkMetaImageReader.h>****
>
> #include <vtkImageData.h>****
>
> #include <vtkSmartPointer.h>****
>
> #include <vtkImageViewer2.h>****
>
> #include <vtkImageBlend.h>****
>
> #include <string>****
>
> int main ( int argc, char* argv[] )****
>
> {****
>
>   // Parse input arguments****
>
>   if ( argc != 3 )****
>
>     {****
>
>     std::cerr << "Usage: " << argv[0]****
>
>               << " Input1Filename Input2Filename" << std::endl;****
>
>     return EXIT_FAILURE;****
>
>     }****
>
>  ****
>
>   std::string input1Filename = argv[1];****
>
>   std::string input2Filename = argv[2];****
>
>  // Read the images****
>
>   vtkSmartPointer<vtkMetaImageReader> MetaImageReader1 =****
>
>     vtkSmartPointer<vtkMetaImageReader>::New();****
>
> MetaImageReader1->SetFileName ( input1Filename.c_str() );****
>
>  vtkSmartPointer<vtkMetaImageReader> MetaImageReader2 =****
>
>     vtkSmartPointer<vtkMetaImageReader>::New();****
>
> MetaImageReader2->SetFileName ( input2Filename.c_str() );****
>
>   // Combine the images (blend takes multiple connections on the 0th
> input port)****
>
>   vtkSmartPointer<vtkImageBlend> blend =****
>
>     vtkSmartPointer<vtkImageBlend>::New();****
>
>   blend->AddInputConnection(MetaImageReader1->GetOutputPort());****
>
>   blend->AddInputConnection(MetaImageReader2->GetOutputPort());****
>
>   blend->SetOpacity(0,.5);****
>
>   blend->SetOpacity(1,.5);****
>
>  // Display the result****
>
>   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =****
>
>     vtkSmartPointer<vtkRenderWindowInteractor>::New();****
>
>  vtkSmartPointer<vtkImageViewer2> imageViewer =****
>
>     vtkSmartPointer<vtkImageViewer2>::New();****
>
>   imageViewer->SetInputConnection(blend->GetOutputPort());****
>
>   imageViewer->SetupInteractor(renderWindowInteractor);****
>
>   imageViewer->GetRenderer()->ResetCamera();****
>
>   imageViewer->GetRenderer()->SetBackground(1,0,0); //red****
>
>  renderWindowInteractor->Initialize();****
>
>   renderWindowInteractor->Start();****
>
>  return EXIT_SUCCESS;****
>
> }****
>
> ERROR: In C:\VTK-5.10.0\VTK\Imaging\vtkImageBlend.cxx, line 913****
>
> VTKImageBlend[00B6FD18]:Execute:input1 ScalarType [11],must match output
> ScalarType [5]****
>
> How do I resolve the above error?  I am attaching the two input “mhd”
> files. Could Someone Please help me out.****
>
> Thank you.****
>
> Regards,****
>
> Ravi Teja.****
>
>  ****
>
>  ****
>
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-- 
Unpaid intern in BillsBasement at noware dot com
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