[vtkusers] vtkImageToStructuredPoints

[Jon Luisi]

For the VtkImageToStructuredPoints SetInput documentation calls for 
vtkImageData.
In code vtkImageAlgorithm::SetInput(vtkDataObject*)

I am trying to add the input from a vtkImageReader reader->GetOutput()
Do I need to recast the vtkImageData from the reader to a vtkDataObject, 
and if so what is the best method?
Jon