The masking I can understand but I'm not sure how to go about cutting across areas which are narrow to one another.
The Laplacian of the distance to the border looks like it may be something but not sure how to create lines using that.
My guess would be after those areas are found and cut you can lay the pieces out in uv space and cut slice through them.
All just guesses if anyone has any ideas I would appreciate it. I've attached my hipFile but it's all over the place with what I was trying.
Image Not Found