Essential to sensory processing in the human visual system is natural illumination, which
can vary considerably not only across space but also along the day depending on the …

Purpose: In natural complex environments the spectral composition of surface illumination
varies with location and direction owing to occlusions, mutual reflections and solar elevation …

To what extent do observers' judgments of surface color with natural scenes depend on
global image statistics? To address this question, a psychophysical experiment was …

In natural complex environments, the elevation of the sun and the presence of occluding
objects and mutual reflections cause variations in the spectral composition of the local …

Despite the natural occurrence of global and local daylight changes in natural scenes, the
human visual system typically adapts well to these changes and develops stable colour …

Observers can generally make reliable judgments of surface color in natural scenes despite
changes in an illuminant that is out of view. This ability has sometimes been attributed to …

How well can categorical colour perception be maintained in natural environments with
varying illuminants? To address this question, a colour-naming experiment was performed …

Despite the global and local daylight changes naturally occurring in natural scenes, the
human visual system usually adapts quite well to those changes, developing a stable color …

The spatial filtering applied by the human visual system appears to be low pass for
chromatic stimuli and band pass for luminance stimuli. Here we explore whether this …

By adaptational and other mechanisms, the visual system can compensate for moderate
changes in the colour of the illumination on a scene. Although the colours of most surfaces …