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Related Experiment Video

Updated: Jun 9, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

How are lateral chromatic interactions computed from cone signals?

Christian Wehrhahn¹, Harald J Teufel

¹Max-Planck-Institut für biologische Kybernetik, Physiology of Cognitive Processes, Tübingen, Germany. christian.wehrhahn@tuebingen.mpg.de

Neural Computation

|September 1, 2010

Summary

This summary is machine-generated.

Chromatic induction alters photoreceptor sensitivity. This study found that both receptor and postreceptor mechanisms equally contribute to perceived color shifts under dichoptic viewing conditions, explaining chromatic induction effects.

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Area of Science:

Visual perception
Color science
Neuroscience

Background:

Chromatic induction causes a test field to appear tinted with the complementary color of its surround.
The influence of surrounds on photoreceptor sensitivity is not fully understood.

Purpose of the Study:

To investigate if photoreceptor sensitivity in a test field is altered by a colored surround.
To determine the contributions of receptor and postreceptor mechanisms to chromatic induction using dichoptic viewing.

Main Methods:

Dichoptic viewing: Left eye viewed a gray target on a colored background; right eye viewed a gray target on a gray background.
Image fusion created a single percept of a homogeneous background and two targets.
Color matching by observers to quantify the perceived color shift.

Main Results:

Observers perceived the gray target in the left eye as tinted by the surround's complementary color.
A modified two-stage model was fitted to the matched settings.
The perceived color shift was explained by approximately equal contributions from receptor and postreceptor processes.

Conclusions:

Chromatic induction effects under dichoptic viewing are well explained by a combination of receptor and postreceptor mechanisms.
Both early (receptor) and later (postreceptor) visual processing stages contribute significantly to color perception shifts caused by surrounds.