Late Vision

The retinal neurons detect local contrasts from the visual signals. The fragmented contour information so extracted are transmitted to the brain for further processing. These pieces of information are stitched together in the brain and interpreted with the processes of perception and cognition to create a model of the environment. These processes are collectively known as late vision. This chapter reviews some of those processes and seeks their explanation. It presents some examples of artificial implementations of the processes. One of the first tasks in the late vision is integrating the slightly disparate visual inputs from the two eyes and to create a 3D model of the world. The process is known as stereopsis. One of the direct consequences of perceptual grouping is the separation of the foreground objects in an image from the background. This is known as foreground–background separation, or figure‐ground separation.