Read DICOM images

Question

i am trying to read dicom images without using imageviewer and i came across VtkGdmReader.. when i am trying to execute it, its giving me an error:

code => vtkGdmReader example

error C2039: 'SetInput' : is not a member of 'vtkTexture'

error C2039: 'SetInput' : is not a member of 'vtkPolyDataMapper'

please can any one tell me why am i facing this problem, is this error related to vtk version ? if so then how can i go about it ?

please help me resolving the problem..

Answer 1

As said in the comments, this error is related to the VTK version. SetInput() was removed in VTK 6.

You can either work in VTK 5 or update the code. If you decide to update it, this error gets fixed by replacing SetInput() with either SetInputData() or SetInputConnection() with a few modifications. You should use SetInputConnection() if you want the filters to go through the pipeline.

As an example of fixing the errors you mentioned, you should replace the following lines in the code you provided:
VTKtexture->SetInput(ima); and
VTKplaneMapper->SetInput(VTKplane->GetOutput());
to:
VTKtexture->SetInputConnection(reader->GetOutputPort()); and
VTKplaneMapper->SetInputConnection(VTKplane->GetOutputPort());

In the second modification (VTKplaneMapper), note that we just changed GetOutput() to GetOutputPort(), while in the first one (VTKtexture) we completely changed the argument passed to SetInputConnection(). That happens because data objects (such as ima) no longer have dependency on pipeline objects (such as algorithms and executives). In this case, we give the algorithm that generated that data object as the argument - if you look for it, you can see the line vtkImageData* ima = reader->GetOutput();, you just have to replace GetOutput() by GetOutputPort() as we did in the second modification.

I recommend looking into the VTK Wiki's VTK 6 Migration pages (and guide) for more information on this error and other errors that you might run into.