Despite the complexity of the visual world, humans rarely confuse variations in illumination,
for example shadows, from variations in material properties, such as paint or stain. This …

Background: Since ancient times people have been attracted by flowers and have invested
precious energy to cultivate them even though there is no known reward for this costly …

We have revealed a new role for colour vision in visual scene analysis: colour vision
facilitates shadow identification. Shadows are important features of the visual scene …

The dietary diversity of marmosets is substantial, which may reflect differences in their colour
vision. This study examined the colour discrimination ability of a gummivore/insectivore …

We provide a theoretical analysis of some empirical facts about the second order
spatiochromatic structure of natural images in color. In particular, we show that two simple …

The perception of blur in images can be strongly affected by prior adaptation to blurry
images or by spatial induction from blurred surrounds. These contextual effects may play a …

Cuttlefish are colour blind yet they appear to produce colour-coordinated patterns for
camouflage. Under natural in situ lighting conditions in southern Australia, we took point-by …

Traditionally, thresholds for detecting photometric changes have been measured by using
stimuli such as disks or gratings and accounted for in terms of relatively low-level …

It has recently been shown that the visual system is more sensitive to uniform color and/or
luminance changes applied to raw compared to phase-scrambled images of natural scenes …

This paper presents a “bag of keypoints” based medical image retrieval approach to cope
with a large variety of visually different instances under the same category or modality …