Perceiving and Recognizing Objects

This chapter explores the mechanisms enabling the brain to perceive and recognize objects, starting from simple visual features to complex object identification. It details the transition from early processing of edges and lines in the primary visual cortex (V1) to advanced analysis in the extrastriate and inferotemporal regions, highlighting the “what” and “where” pathways that distinguish object identity from spatial location. Midlevel vision addresses challenges in object perception, such as recognizing occluded or ambiguous objects, by organizing basic visual inputs into coherent entities using principles like edge grouping and figure-ground assignment. The chapter extends to object recognition, emphasizing how stored memories and neural plasticity facilitate identifying diverse stimuli, including faces and complex shapes. By combining computational models and experimental findings, the chapter underscores the sophisticated yet efficient strategies of the visual system in deciphering a dynamic visual world.