Abstract
Color appearance models can be used as an experimental design and analysis tool to better study high-level color perception involving brightness and chromatic adaptation. We investigate the experimental basis for the Helmholtz-Kohlrausch effect, the contribution of chromatic intensity to our perception of brightness. A new experimental method for measuring the brightness of chromatic colors leads to a model of the Helmholtz-Kohlrausch effect, which we use to extend CIECAM16, the color appearance model recommended by the Commission Internationale de l'Eclairage. The model is tested on high-dynamic-range images. The process of building this model also leads to several improvements in CIECAM16 itself. We then investigate how color appearance models can similarly be used to design experiments and model cognitive mechanisms of discounting the color of illumination. Two different experimental modalities are used to separately measure sensory and cognitive mechanisms of chromatic adaptation to heterochromatic lighting conditions. The results provide insight into this cognitive phenomenon while also setting new benchmark processes for studies that use asymmetric color matching.
Library of Congress Subject Headings
Brightness perception; Color vision; Colors--Analysis--Mathematical models
Publication Date
12-2023
Document Type
Dissertation
Student Type
Graduate
Degree Name
Color Science (Ph.D.)
Department, Program, or Center
Color Science
College
College of Science
Advisor
Mark D. Fairchild
Advisor/Committee Member
Jeff Pelz
Advisor/Committee Member
Michael Murdoch
Recommended Citation
Hellwig, Luke, "Novel Psychophysics of Cognitive Color Appearance Phenomena" (2023). Thesis. Rochester Institute of Technology. Accessed from
https://repository.rit.edu/theses/11634
Campus
RIT – Main Campus
Plan Codes
CLRS-PHD
