Information gained by probing

The goal of probing is to gain information about the shape under investigation. A probe outcome has two elements of information: the contact point (if any) and the path traced by the probe. It is easy to see that the contact points are lying on the boundary of the shape. The path traced by the probe also defines an infinite or semi-infinite line of point that cannot be part of the shape. As we will see in this section, the assumptions stated in the previous section allow us to deduct even more information from the probe outcomes.



Classification of Points