Inverted shape segmentation ideas

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Inverted shape segmentation ideas

gstrunk
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Hey everyone,

I am trying to take a model of a primitive shape like a cylinder and find a place in a point cloud that the shape would fit.  If you think of a model of a peg and the environment is a peg board.  I am trying to find places where the peg would fit.  I have been trying to adapt the segmentation methods, but it seems many are looking for a cluster of points and I am looking for the negative space.  Has anyone had any luck with something like this or have any ideas on how to solve it?  I am currently exploring using normals to try and fit the inverted normals of the model to the environment, but I don't know if there is a better way to do this.  Any help is greatly appreciated.