vtkImageOut = vtkImageData::New();
vtkImageOut->SetDimensions( outputdims );
vtkImageOut->SetExtent(0,outputdims[0]-1,0,outputdims[1]-1,0,outputdims[2]-1);
vtkImageOut = vtkImageData::New();
vtkImageOut->SetDimensions( outputdims );
vtkImageOut->SetExtent(0,outputdims[0]-1,0,outputdims[1]-1,0,outputdims[2]-1);