[vtkusers] How to use vtkFeatureEdges?

[Wenlong]

Dear all

I have a 3D human face model. Now I'd like to find its boundry when it is
projected onto 2D plane. I googled about how to implement it in VTK and find
vtkFeatureEdges. However, the result from vtkFeatureEdges is a little
confusion to me. It's not only give me the contour of a human face in red
color, there are also green curves to draw the outline of nose and mouth.
Moreover, the most confusing part is there is a red curve starts from the
forehead and stops at the chin which across the face. 

Can anyone explain to me how to use vtkFeatureEdges to extract a contour of
shape? By that I mean the close curve formed by outermost points.

Many thanks in advance for your help.

Best wishes
Wenlong

--
View this message in context: http://vtk.1045678.n5.nabble.com/How-to-use-vtkFeatureEdges-tp5714174.html
Sent from the VTK - Users mailing list archive at Nabble.com.