Why aspect graphs are not (yet) practical for computer vision

The aspect graph of an object is a graph structure in which each node represents a general view of the object as seen from some maximal, connected cell of viewpoint space; each arc represents an accidental view (or visual event) which occurs on the boundary between two cells of general viewpoint; there is a node for each possible general view of the object, and there is an arc for each possible visual event. The authors provide a critique of the aspect graph approach.<
>