[vtkusers] Extract region with vtkTracerInteractorStyleImage

[Fabian Torres]

Hi all.

I have a class that inherits from vtkTracerInteractorStyleImage. This class allows the user to draw closed lines in an image and extract the vtkPath and vtkPoints every time the class catches a tracerEvent.

My problem is that I want to extract the value of every pixel inside the drew region. How can I do this using the information from the obtained vtkPath or vtkPoints.

Thnanks all