A neural field model for color perception unifying assimilation and contrast
Fig 4
f and g functions, displayed on a 1D axis for illustration purpose.
The influence of c′ and r′ over c and r, respectively, depends on their position relative to (c, −c) and r. In color space, it is positive when c′ is closer to c, negative when it is closer to −c; in physical space, it is positive when r′ is an adjacent neighbor of r, and negative when it is a remote one.