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Related Experiment Video

Updated: Jun 5, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Categorical color constancy for real surfaces.

Maria Olkkonen¹, Christoph Witzel, Thorsten Hansen

¹Department of Psychology, University of Giessen, Giessen, Germany. mariaol@sas.upenn.edu

Journal of Vision

|December 29, 2010

Summary

This summary is machine-generated.

Object color perception remains stable despite changing light, aiding identification. This study confirms robust color constancy using real surfaces and illuminants, crucial for object recognition and communication.

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Area of Science:

Vision Science
Perceptual Psychology
Color Science

Background:

Object color constancy is vital for stable visual perception across varying illumination conditions.
Traditional studies often use monitor simulations, potentially missing real-world contextual factors.
Real scenes offer richer visual cues that may influence color constancy.

Purpose of the Study:

To investigate categorical color constancy using real surfaces and illuminants in a complex visual environment.
To determine if color categorization remains robust under different lighting conditions and with manipulated illuminant cues.
To assess the consistency of color categorization across different observers and illuminants.

Main Methods:

Participants sorted 450 Munsell color samples into 11 basic color categories.
Experiments were conducted under a standard daylight illuminant and four filtered daylight illuminants.
Illuminant cues from the local surround were manipulated to assess their influence.

Main Results:

Color constancy was high, as measured by classification consistency and standard color constancy indices.
Color classification precision remained consistent across different illuminants and observer repetitions.
Patterns of color categorization consistency were similar across observers and illuminants.

Conclusions:

Categorical color constancy is robust under changes in illumination and across different observers.
Stable color categorization supports reliable object identification and interpersonal communication.
Real-world viewing conditions enhance the understanding of color constancy mechanisms.