Outline: Brightness
Brightness vs. Lightness vs. Intensity
Three determinants of perceived brightness and lightness
Coding of contrast in the retina and
beyond, Ratio rule
Perceptual consequences of lateral
inhibition
Background: Limulus eye
(Ratliff/Hartline)
Mach bands and border enhancement
Craik-O'Brien/Cornsweet edges
Hermann Grid
Illusory spots
Variation in eccentricity = variation in RF size
Brightness is not just local luminance
Simultaneous contrast (brightness
constancy and the ratio rule)
Configuration effects and 3-D
interpretation
Shape/geomery, shading, reflectance,
illumination, transparency
Adelson's and other demonstrations