ABSTRACT
In previous chapters I argued that the space we perceive is represented by multiple spatial reference frames. For the most part, these spatial frames represent the structure of shapes or objects, their spatial relationships to each other, as well as the planes on which objects appear. Objects, groups of objects or whole scenes require some type of spatial skeleton in order to take form. This skeleton includes several spatial frames, creating a hierarchy of reference frames, somewhat akin to that proposed some years ago by Palmer (1989). The major focus in this chapter concerns how features that are not easily defined by spatial frames are integrated within object boundaries (e.g., the green of a green ball).
