Adaptation under dichromatic illumination.

Area of Science:

• Color science
• Visual perception
• Computational imaging

Background:

• Chromatic adaptation transforms (CATs) like CMCCAT97, CAT02, and CAT16 predict color changes under different illuminants.
• Existing CATs typically use uniform stimuli and backgrounds, limiting their accuracy in complex real-world scenes.
• Previous mixed adaptation models often exclude spatial complexity's impact.

Purpose of the Study:

• To investigate chromatic adaptation under spatially complex, dichromatic illumination.
• To quantify the effect of spatial configuration on adaptation and equivalent illuminant chromaticity.
• To propose a preliminary CAT model accounting for spatial and colorimetric complexity.

Main Methods:

• Conducted an achromatic matching experiment using simultaneous spatially dichromatic illumination.
• Tested three illumination color pairs with various spatial configurations.
• Analyzed the impact of spatial configuration on the degree of adaptation and equivalent illuminant chromaticity.

Main Results:

• Spatial configuration significantly influences chromatic adaptation.
• The degree of adaptation varies with different spatial arrangements of dichromatic lighting.
• Equivalent illuminant chromaticity is affected by spatial complexity.

Conclusions:

• Chromatic adaptation is influenced by the spatial complexity of illumination.
• A preliminary CAT model incorporating spatial and colorimetric factors is proposed.
• This research advances the understanding of color perception in complex visual environments.