[vtkusers] extracting sub image data

[Anja Ende]

Hi everyone,

Is there a filter in VTK that will give me the image pixels within a certain
boundary. So, I have a 2d image an I draw a closed curve to define a certain
region of interest.Now what I want to do is extract the image data within
that region of interest. Is there something built into VTK that might
already do that?

Thanks a lot,

Anja
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