When we move about a room, the shapes of things change. How can these changes be anticipated, or compensated, without complete reprocessing? The results of eye and head rotation are simple: things move in the visual field but keep their shapes; but changing place causes large shape changes that depend both on angle and on distance relations between the object and observer. The problem is particularly important for fast-moving animals because a model of the scene must be built up from different, partially analyzed views. Perhaps the need to do this, even in a relatively primitive fashion, was a major evolutionary stimulus to develop frame-systems, and later, other symbolic mechanisms.
A Framework for Representing Knowledge
MIT-AI Laboratory Memo 306, June, 1974.