Evidence from neurophysiological and psychological studies is coming togeth
er to shed light on how we represent and recognize objects. this review des
cribes evidence supporting two major hypotheses: the first is that objects
are represented in a mosaic-like form in which objects are encoded by combi
nations of complex, reusable features. rather than two-dimensional template
s, or three-dimensional models. the second hypothesis is that transform-inv
ariant representations of objects are learnt through experience, and that t
his learning is affected by the temporal sequence in which different views
of the objects are seen, as well as by their physical appearance.