Topic: dynamic conditions

For visual perception to be unaffected by viewing conditions, animals must adapt their sensitivity to changing visual statistics, such as mean illumination. Consistently, photoreceptors in many species control their luminance gain and encode relative changes in luminance [1,2], termed contrast. However, this early gain control is insufficient for luminance invariant contrast estimation in dynamic conditions. Sudden transitions to dim or bright environment would lead to an erroneous, reduced or enhanced perception of contrasts, thus imposing a two-way challenge on contrast estimation. Yet, visu