[vtkusers] conversion from vtkImageData to vtkDataObject

[Martine Lefevre]

Hi,
I'd like to compute the curvature of an 3D object and I got the following error:
error C2664: 'void vtkPolyDataAlgorithm::SetInput(vtkDataObject *)' : cannot convert parameter 1 from 'vtkImageData *' to 'vtkDataObject *'. 
So my question is how I can convert form vtkImageData to vtkDataObject.
Thanks 
Martine


      
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