Image segmentation and the perception of lightness and color

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Almost half of the brain is involved in interpreting visual information, which provides the most detailed and precise information about the external world for humans (and many other species). Despite the great ease with which our brains determine the structure and properties of the world from visual information, this is an extremely difficult problem. One of the most basic issues involves understanding how the brain determines the perceived color of objects, despite drastic variations in the illumination and atmospheric conditions (such as smoke or fog) in which objects are embedded. This research will provide valuable insight into how the visual system solves this important problem.