ABSTRACT
The low-level sensory representations created by the retinas are varied and complex as the previous chapter showed. Once formed, they are processed by the intermediate-level visual networks which form intermediate-level representations of the world and objects in it. The intermediate-level representations make explicit various features such as position, surface orientation, surface quality, and movement of the scene and objects in it. The set of intermediate-level representations comprises the primal sketch. The intermediate-level representations are further analyzed and high-level representations are formed which make explicit salient features of the scene and objects in it. Features of selected objects include their locations, orientations in space, surface orientations, contact and connectivity points, movements, and so forth.
