Beschreibung:
Changes in luminance over space and time drive visual behaviors across species. Thus, sensitivity to luminance changes or contrast is fundamental to visual perception. Visual perception has to work in many different conditions, and these conditions can change rapidly. For perception unaffected by viewing conditions, contrast sensitivity must remain constant despite changing visual statistics, such as changes in mean luminance. Across species, photoreceptor gain control maintains the system sensitive enough to capture light changes over vastly varying illumination, however the gain control o...