Abstract

To determine the role of chroma and illumination conditions on assessments of unique hue stimuli (UHs: Y, B, R, and G) 25 color normal observers selected Munsell color chips under controlled but different light sources that included simulated D65 daylight, incandescent (A), CWF and TL84, from two rotatable trays—one containing low and the other high chroma samples. Three independent evaluations were obtained from each observer with a gap of at least 24 h between assessments. A total of 2400 UH assessments were thus obtained. The mean, as well as the range and variability, in UH selections was calculated according to gender, illumination condition, and chroma. Results show statistically significant differences for uB and uR stimuli selections from the low to the high chroma sets under all lighting conditions, and for uY under light source A and CWF while differences in uG selections in different lighting conditions were statistically insignificant. No significant difference was found between male and female UH selections. Hue shift predictions based on CAT02 transform were found to agree well with observer responses under different illumination conditions. It was also found that observers’ UH choices varied more for low chroma samples under different lighting conditions compared to high chroma samples. The highest variability was obtained under light source CWF, while the simulated D65 source resulted in the lowest variability in selections.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Unique-hue stimulus selection using Munsell color chips

David Hinks, Lina M. Cárdenas, Rolf G. Kuehni, and Renzo Shamey
J. Opt. Soc. Am. A 24(10) 3371-3378 (2007)

How well are color components of samples of the Natural Color System estimated?

Renzo Shamey, Sarah Shepherd, Mira Abed, Michael Chargualaf, Nicholas Garner, Nicholas Dippel, Nathan Weisner, and Rolf G. Kuehni
J. Opt. Soc. Am. A 28(10) 1962-1969 (2011)

Chips in the sunshine: color constancy with real versus simulated Munsell chips under illuminants adjacent to the daylight locus

Jeremiah M. F. Kelly, Ausra Daugirdiene, Janus J. Kulikowski, and Ian J. Murray
J. Opt. Soc. Am. A 35(4) B100-B105 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (9)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription