Two typical sequences from a probing task were run. In the first sequence (Figure 14), the probe was introduced into the scene and moved in a legal way (accepted by stable states in the machine) towards the part until contact was made. Next, the probe backed off and again approached until the probe and part overlapped. The automaton was forced into an error state by approaching from the other side of the part much too fast. The probe was not seen until it was too close to the object body. Because a transition from state A to C is invalid, an error state is reached. The part used was a simple one with only one hole, that is, it is represented by : C(C()).
Another sequence was tried out (Figure 15), the part was more complex, the representation was recovered to be the following string : C(C(),C(C()),C()). The probe was introduced into the scene and moved legally towards the part. Next, the probe backed off and again approached until the probe and the part overlapped. The automaton was forced into an error state by the sudden disappearance of the probe after it was very close to the part. Because a transition from state C to state A is invalid, an error state is reported. Each image was displayed on a terminal window as it was captured along with the corresponding state of the automaton. The same state representations are displayed for different layers in the DRFSM (i.e. for different features).