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Summary: On adaptive non-linearity for color
discrimination and chromatic adaptation
David Alleysson and Sabine Süsstrunk
Audiovisual Communications Laboratory (LCAV)
Swiss Federal Institute of Technology (EPFL)
Lausanne, Switzerland
Abstract
Assuming that the photoreceptor response of the
human visual system is adaptive and non-linear, we can
derive mathematical properties that can account for both
color discrimination and chromatic adaptation. This
could be due to the photoreceptors' response to
illumination, which is non-linear and varies according to
the adaptation state. Assuming the Naka-Rushton non-
linear function and an automatic gain control function,
we can derive color discrimination and chromatic
adaptation data. We extend the discussion to a three-
layer model of retinal color processing, and show how
we could predict corresponding color data.
Introduction
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