Affiliation:
1. Justus-Liebig-Universität-Gießen
2. Bournemouth University
Abstract
The distribution of colors across a surface depends on the interaction
between its surface properties, its shape, and the lighting
environment. Shading, chroma, and lightness are positively correlated:
points on the object that have high luminance also have high chroma.
Saturation, typically defined as the ratio of chroma to lightness, is
therefore relatively constant across an object. Here we explored to
what extent this relationship affects perceived saturation of an
object. Using images of hyperspectral fruit and rendered matte
objects, we manipulated the lightness–chroma correlation (positive or
negative) and asked observers which of two objects appeared more
saturated. Despite the negative-correlation stimulus having greater
mean and maximum chroma, lightness, and saturation than the
positive, observers overwhelmingly chose the positive
as more saturated. This suggests that simple colorimetric statistics
do not accurately represent perceived saturation of objects—observers
likely base their judgments on interpretations about the cause of the
color distribution.
Funder
European Research Council
Subject
Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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