[vtk-developers] Selecting points using something like brush

[Thupakula]

Hi All,
I am new to VTK.
I am developing an algorithm for segmentation of Binary images using
Graphcuts.
I would like get the seed points from the foreground and background of the
image.
I am using VTK to interact with image but dont know if there is any function
that can work like a brush  and get those points that are on that line .

Can anybody suggest how to do this ?

Thank you,
Saraswathi
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