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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 3458–3467

Measuring color differences in automotive samples with lightness flop: A test of the AUDI2000 color-difference formula

Manuel Melgosa, Juan Martínez-García, Luis Gómez-Robledo, Esther Perales, Francisco M. Martínez-Verdú, and Thomas Dauser  »View Author Affiliations


Optics Express, Vol. 22, Issue 3, pp. 3458-3467 (2014)
http://dx.doi.org/10.1364/OE.22.003458


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Abstract

From a set of gonioapparent automotive samples from different manufacturers we selected 28 low-chroma color pairs with relatively small color differences predominantly in lightness. These color pairs were visually assessed with a gray scale at six different viewing angles by a panel of 10 observers. Using the Standardized Residual Sum of Squares (STRESS) index, the results of our visual experiment were tested against predictions made by 12 modern color-difference formulas. From a weighted STRESS index accounting for the uncertainty in visual assessments, the best prediction of our whole experiment was achieved using AUDI2000, CAM02-SCD, CAM02-UCS and OSA-GP-Euclidean color-difference formulas, which were no statistically significant different among them. A two-step optimization of the original AUDI2000 color-difference formula resulted in a modified AUDI2000 formula which performed both, significantly better than the original formula and below the experimental inter-observer variability. Nevertheless the proposal of a new revised AUDI2000 color-difference formula requires additional experimental data.

© 2014 Optical Society of America

OCIS Codes
(330.1690) Vision, color, and visual optics : Color
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1730) Vision, color, and visual optics : Colorimetry

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: October 10, 2013
Revised Manuscript: December 23, 2013
Manuscript Accepted: January 3, 2014
Published: February 6, 2014

Virtual Issues
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Manuel Melgosa, Juan Martínez-García, Luis Gómez-Robledo, Esther Perales, Francisco M. Martínez-Verdú, and Thomas Dauser, "Measuring color differences in automotive samples with lightness flop: A test of the AUDI2000 color-difference formula," Opt. Express 22, 3458-3467 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-3-3458


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