How does an animal conceal itself from visual detection by other animals? This review
paper seeks to identify general principles that may apply in this broad area. It considers …

Visual metrics can play an important role in the evaluation of novel lighting, rendering, and
imaging algorithms. Unfortunately, current metrics only work well for narrow intensity ranges …

Studies of chromatic discrimination are typically based on homogeneously colored patches.
Surfaces of natural objects, however, cannot be characterized by a single color. Instead …

We conducted suprathreshold discrimination experiments to compare how natural-scene
information is processed in central and peripheral vision (16° eccentricity). Observers' …

Color discrimination is influenced by chromatic distributions such as they appear on
differently illuminated 3D surfaces (T. Hansen, M. Giesel, & KR Gegenfurtner, 2008). Here …

The Euclidean and MAX metrics have been widely used to model cue summation
psychophysically and computationally. Both rules happen to be special cases of a more …

Natural visual scenes are rich in information, and any neural system analysing them must
piece together the many messages from large arrays of diverse feature detectors. It is known …

The study of visual signal design is gaining momentum as techniques for studying signals
become more sophisticated and more freely available. In this paper we discuss methods for …

Shadows may be “discounted” in human visual perception because they do not provide
stable, lighting-invariant, information about the properties of objects in the environment …

Animal camouflage provides some of the most striking examples of the workings of natural
selection, whether employed defensively to reduce predation risk, or offensively to minimise …