[vtkusers] 3D silhouette and 2D silhouette

[Rachel]

What i could understand is that the silhouette is extracted from 2D image...
My problem is to extract the boundary in 3D and generate 2D image of the
silhouette. Also i need to go back from image to 3D data. Or at least i
should know which pixel corresponds to which vertex in the mesh ..


Please help me
Many thanks
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