Contributed Session 1: Color and Lightness

Session Summary: Contributed Papers

1. White’s effect in lightness, color and motion

In White’s (1979) illusion of lightness, the background is a square-wave grating of black and white stripes (Fig. 1a). Grey segments that replace parts of the black stripes look much lighter than grey segments that replace parts of the white stripes. Assimilation from flanking stripes has been proposed, the opposite of simultaneous contrast. We use colored patterns to demonstrate that the perce...

Opening Session Stream: Contributed Session Plenary Session Stream: Plenary Lectures Invited Session

Stream: Contributed session Plenary session Chair: Laura Palagi, Dipartimento di Ingegneria informatica automatica e gestionale, La Sapienza Università di Roma, Via Ariosto, 25, 00185, Roma, Italy, [email protected] Chair: Fabio Schoen, Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Firenze, via di Santa Marta, 3, 50139, Firenze, Italy, [email protected] Wednes...

Lightness Perception: Seeing One Color through Another

A newly described and dramatic visual illusion suggests that the retinal image is decomposed by the brain into overlapping layers, not into contiguous frameworks of illumination.

Using color to understand perceived lightness.

We report a series of experiments that employed chromatic variants of lightness illusions in an attempt to gain theoretical leverage into the types of computations that are responsible for the illusions. Two types of displays were used: one that elicits a strong percept of transparency and one that does not. We compared the pattern of induction observed in chromatic and achromatic variants of b...