VISION EXPERIMENT ON CHROMA SATURATION FOR COLOR QUALITY PREFERENCE
Yoshihiro Ohno, Carl C. Miller, Mira Fein
Color Rendering Index (CRI) often does not correlate well with visual evaluation of color rendering of light sources at real illuminated scenes. The main reason is that CRI measures color fidelity, while general users judge color rendering based on their preference of object color appearance, thus there is a need for a color-preference based metric. Color preference is mainly affected by saturation of object chroma. To obtain data for such color preference evaluation, a series of vision experiments have been conducted using the NIST Spectrally Tunable Lighting Facility simulating an interior room, where 20 subjects viewed various fruits, vegetables, and their skin tones, under illumination of varied saturation levels at correlated color temperatures (CCT) of 2700 K, 3500 K, and 5000 K. The results of the experiment show that subjects preference is consistently peaked at saturation level of ΔC*ab ≈ 5 at all CCT conditions and for all target objects. The results may be useful to develop a color preference metric.
Proc., the 28th Session of the CIE
June 29-July 3, 2015
The 28the Session of International Commission on Illumination
color rendering, color preference, chroma saturation, perception, vision experiment
, Miller, C.
and Fein, M.
VISION EXPERIMENT ON CHROMA SATURATION FOR COLOR QUALITY PREFERENCE, Proc., the 28th Session of the CIE, Manchester, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918717
(Accessed August 10, 2022)