Color constancy

Definition

Color constancy is the feature of the human visual system that ensures perceived colors of objects remain relatively constant under varying illumination conditions. It allows us to recognize colors regardless of the lighting environment.

5 Must Know Facts For Your Next Test

1. Color constancy is essential for recognizing objects in different lighting conditions, such as daylight or artificial light.
2. The brain uses contextual information and prior knowledge about objects to maintain color constancy.
3. Chromatic adaptation, where the eye adjusts to changes in lighting over time, contributes to color constancy.
4. Surrounding colors and light sources influence our perception of an object's color due to simultaneous contrast effects.
5. Color constancy can sometimes fail under extreme lighting conditions, leading to optical illusions or color shifts.

Review Questions

• What is color constancy and why is it important?
• How does chromatic adaptation contribute to maintaining color constancy?
• Explain how surrounding colors can affect our perception of an object's true color.

Related terms

Chromatic Adaptation: The process by which the human eye adjusts its sensitivity to different wavelengths (colors) of light, helping maintain consistent perception under various lighting conditions.

Simultaneous Contrast: A phenomenon where the perception of a color is affected by surrounding colors, often making a color appear differently based on its context.

Illumination: The amount and quality of light that falls on an object, influencing how its colors are perceived by the human eye.