Topic: spatial filters

How does the visual system adapt when the amount of light in the scene changes, such as when an animal leaves a shaded area or when night turns to day? As light levels increase and the relative amount of noise in the scene decreases, efficient coding theory predicts a transition in sensory processing. At low light levels, sensory systems should integrate spatial and temporal information, while at high light levels, neural processing should differentiate incoming signals to subtract predictive components. Previous experimental work has shown that, indeed, the center-surround structure of spatia