Spatial filtering models are currently a widely accepted mechanistic account of human
lightness perception. Their popularity can be ascribed to two reasons: They correctly predict …

We consider a differential model describing neuro-physiologi-cal contrast perception
phenomena induced by surrounding orientations. The mathematical formulation relies on a …

The illusion that is now commonly referred to as 'White's illusion'involves changes in the
lightness of the mid-grey test elements that replace sections of the black or white bars of a …

The Chevreul illusion is a well-known 19th century brightness illusion, comprising adjacent
homogeneous grey bands of different luminance, which are perceived as inhomogeneous. It …

Lateral connections in the primary visual cortex (V1) have long been hypothesized to be
responsible for several visual processing mechanisms such as brightness induction …

The visual system is highly sensitive to spatial context for encoding luminance patterns.
Context sensitivity inspired the proposal of many neural mechanisms for explaining the …

White's illusion is the perceptual effect that two equiluminant gray patches superimposed on
a black-and-white square-wave grating appear different in lightness: A test patch placed on …

An object's colour, brightness and pattern are all influenced by its surroundings, and a
number of visual phenomena and “illusions” have been discovered that highlight these often …

Why does our visual system fail to reconstruct reality, when we look at certain patterns?
Where do Geometrical illusions start to emerge in the visual pathway? How far should we …

Simple everyday tasks, such as visual search, require a visual system that is sensitive to
differences. Here we report how observers perceive changes in natural image stimuli, and …