How to display sharp edges with Actor2D images

[Sylvain Jaume]

Hello,

I display a binary image using successively 
vtkStructuredPointsGeometryFilter, vtkPolyDataMapper2D and vtkActor2D. The
edges of the image are smoothed and I want to see them sharp. With a
vtkActor, I can use actor->GetProperty()->SetInterpolationToFlat(), but
this doesn't apply to vtkActor2D. Does anyone know how to display sharp
edges of Actor2D images?

Thanks in advance,
Sylvain

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