Fig. 10. A m+ extremum occurs at the top of the left-hand shape in this figure. In accordance with our Semantic Interpretation Rule, the process terminating at this extremum is a squashing process; i.e., it explains the flattening at the top of the shape. Now let us continue this process; i.e., continue pushing the boundary in the direction shown. At some point, an indentation will be created, as shown in the top of the right-hand shape. | back to text |