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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 28, Iss. 10 — Oct. 1, 2011
  • pp: 1962–1969

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  »View Author Affiliations

JOSA A, Vol. 28, Issue 10, pp. 1962-1969 (2011)

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The aim of this study was to determine how accurately color-normal subjects that have received basic information about, but do not have practical experience with, the Natural Color System (NCS) can estimate the Heringian components of a representative selection of samples. Twenty-five color-normal subjects, taking part in two trials with at least a 24 h gap between assessments, selected four samples representing individual unique hues (uHs) from a set of 40 highly chromatic NCS samples on a rotatable tray. The samples selected for assessment of components were displayed to the subjects who estimated the hue components of 16 high-chroma samples, hue and white/black components of 16 tonal color samples, and three achromatic samples with different blackness values. Variability in selection of samples representing uHs as well as the relationship between the subjects’ estimates of unique hue components and the defined values of the system was obtained. It was found that hues alone are easier to correctly estimate than hues together with white and black and that the components of colors of higher chroma are easier to estimate accurately than those of lower chroma. It was also found that, for R and G, the mean uH choices of subjects differed very little from the NCS’s R and G, whereas selections for yellow and blue deviated, the former by 1.22 hue steps (slightly greener than G90Y), and the latter by 1.36 hue steps (represented approximately by R85B). This may impact the accuracy of color models that employ NCS unique hues.

© 2011 Optical Society of America

OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.5020) Vision, color, and visual optics : Perception psychology

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: May 23, 2011
Revised Manuscript: July 22, 2011
Manuscript Accepted: July 29, 2011
Published: September 1, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

Renzo Shamey, Sarah Shepherd, Mira Abed, Michael Chargualaf, Nicholas Garner, Nicholas Dippel, Nathan Weisner, and Rolf G. Kuehni, "How well are color components of samples of the Natural Color System estimated?," J. Opt. Soc. Am. A 28, 1962-1969 (2011)

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  1. A. Hård and L. Sivik, “NCS—Natural Colour System: Swedish standard for colour notation,” Color Res. Appl. 6, 129–138(1981). [CrossRef]
  2. Swedish Standard SS 01 91 00 colour notation system (SIS), 2nd ed. (Swedish Standards Institution, 1990).
  3. B. D. Judd and D. Nickerson, “One set of Munsell Re-renotations,” Rep. 192693 (U. S. Department of Commerce, National Bureau of Standards, 1967).
  4. E. Hering, Outlines of a Theory of the Light Sense, L.M.Hurvich and D.Jameson, transl. (Harvard University Press, 1964), p. 42.
  5. J. Neitz, Neitz Test of Color Vision (Western Psychological Services, 2001).
  6. R. G. Kuehni, D. Hinks, and R. Shamey, “Experimental object color unique hue data for the mean observer for color appearance modeling,” Color Res. Appl. 33, 505–506(2008). [CrossRef]
  7. G. R. W. Hunt, and M. R. Pointer, “A colour-appearance transform for the CIE 1931 standard colorimetric observer,” Color Res. Appl. 10, 165–179 (1985). [CrossRef]
  8. K. Xiao, S. Wuerger, C. Fu, and D. Karatzas, “Unique hue data for colour appearance models. Part I: loci of unique hues and hue uniformity,” Color Res. Appl. 36, 201–209, doi:10.1002/col.20637 (2011). [CrossRef]
  9. R. Shamey, M. Sedito, and R. G. Kuehni, “Comparison of unique hue stimuli determined by two different methods using Munsell color chips,” Color Res. Appl. 35, 419–424 (2010). [CrossRef]
  10. D. Hinks, L. M. Cardenas, R. G. Kuehni, and R. Shamey,  “Unique-hue stimulus selection using Munsell color chips,” J. Opt. Soc. Am. A 24, 3371–3378 (2007). [CrossRef]
  11. M. Melgosa, J. M. Rivas, E. Hita, and F. Viénot, “Are we able to distinguish color attributes?” Color Res. Appl. 25, 356–366(2000). [CrossRef]
  12. H. Zhang and D. E. Montag, “How well can people use different color attributes?” Color Res. Appl. 31, 445–457 (2006). [CrossRef]
  13. L. D. Philipona and J. K. O’Regan, “Color naming, unique hues, and hue cancellation predicted from singularities in reflection properties,” Visual Neurosci. 23, 331–339 (2006). [CrossRef]
  14. J. D. Mollon and G. Jordan, “On the nature of unique hues,” in John Dalton’s Colour Vision Legacy, C.Dickinson, I.Murray, and D.Carden, eds. (Taylor & Francis, 1997), pp. 381–392.
  15. C. M. Stoughton and B. R. Conway, “Neural basis for unique hues,” Curr. Biol. 18, R698 –R699 (2008). [CrossRef] [PubMed]
  16. I. Abramov and J. Gordon, “Seeing unique hues,” J. Opt. Soc. Am. A 22, 2143–2153 (2005). [CrossRef]
  17. M. A. Webster, E. Miyahara, G. Malkoc, and V. E. Raker, “Variations in normal color vision. II. Unique hues,” J. Opt. Soc. Am. A 17, 1545–1555 (2000). [CrossRef]
  18. G. Malkoc, P. Kay, and M. A. Webster, “Variations in normal color vision. IV. Binary hues and hue scaling,” J. Opt. Soc. Am. A 22, 2154–2168 (2005). [CrossRef]
  19. R. G. Kuehni, “Variability in unique hue selection: a surprising phenomenon,” Color Res. Appl. 29, 158–162 (2004). [CrossRef]
  20. R. De Valois, K. De Valois, E. Switkes, and L. Mahon, “Hue scaling of isoluminant and cone-specific lights,” Vision Res. 37, 885–897 (1997). [CrossRef] [PubMed]
  21. S. M. Wuerger, P. Atkinson, and S. Cropper, “The cone inputs to the unique-hue mechanism,” Vision Res. 45, 3210–3223(2005). [CrossRef] [PubMed]

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