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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 30, Iss. 8 — Aug. 1, 2013
  • pp: 1508–1515

Comparison of the performance of inverse transformation methods from OSA-UCS to CIEXYZ

Renbo Cao, H. Joel Trussell, and Renzo Shamey  »View Author Affiliations

JOSA A, Vol. 30, Issue 8, pp. 1508-1515 (2013)

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The Optical Society of America’s Uniform Color Scales (OSA-UCS) is one of the color spaces that most closely approximate a “true” uniform color space. Different techniques have been used to convert OSA-UCS-based color specification parameters, L, j, and g, to the CIE tristimulus values, X, Y, and Z. However, none of these methods provides a direct method of inverting OSA-UCS to CIEXYZ values. Thus, numerical algorithms, such as the Newton–Raphson method, have been employed to obtain the transformations. The relative low accuracy and long computation time of this method makes it undesirable for practical applications. An artificial neural network (ANN) was employed to convert OSA-UCS to CIEXYZ. Its performance was compared with that of numerical methods. After optimization, ANN gave a better performance with a mean error (ΔEXYZ) of 1.0×104 and a conversion time of less than 1 s for 1891 samples.

© 2013 Optical Society of America

OCIS Codes
(110.6980) Imaging systems : Transforms
(200.4260) Optics in computing : Neural networks
(330.1730) Vision, color, and visual optics : Colorimetry
(350.6980) Other areas of optics : Transforms

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: April 19, 2013
Revised Manuscript: June 11, 2013
Manuscript Accepted: June 12, 2013
Published: July 15, 2013

Virtual Issues
Vol. 8, Iss. 9 Virtual Journal for Biomedical Optics

Renbo Cao, H. Joel Trussell, and Renzo Shamey, "Comparison of the performance of inverse transformation methods from OSA-UCS to CIEXYZ," J. Opt. Soc. Am. A 30, 1508-1515 (2013)

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