Glossary / Lexicon

Color constancy refers to the ability to recognize the color of an object despite changes in lighting. It is the effect in which the perception of an object’s hue remains constant even when the wavelength distribution of the illumination is changed. Approximate color constancy means that our perception of hue usually changes a little when the illumination changes, though not as much as we might expect from the change in the wavelengths of light reaching the eye.