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Influence of Tristimulus Values Correlation and Reference White in Error Propagation to CIELUV and CIELAB Color Parameters
M. Melgosa
R. Huertas
M.J. Rivas
E. Hita
  DOI :  10.2352/CGIV.2002.1.1.art00026  Published Online :  January 2002
Abstract

Random errors propagation from tristimulus values to CIELUV and CIELAB color parameters has been studied considering two factors usually neglected in the literature: the correlation among tristimulus values measurements, and the associated error to the measurement of the reference white. Our study is based on experimental measurements performed by a modern spectroradiometer (SpectraScan PR-704 Photo Research), using 28 Munsell samples illuminated by 3 different luminous sources (D65, F and TL84) provided by a VeriVide color assessment cabinet. Sets of 10 measurements were made by 3 different procedures (short temporal period, large temporal period, and spatial variation), for each one of the color samples and luminous sources mentioned above. Correlation among tristimulus values reduces the error propagated to CIELUV and CIELAB color parameters in a factor up to 2.6, this effect being minimum for L* and b*. The errors in the tristimulus values of the reference white increase the error propagated to CIELUV and CIELAB color parameters in a factor up to 1.8. Anyway, under our experimental conditions, the instrumental errors of the a* and b* coordinates are lower than the visual sub-thresholds predicted by the CIE94 model in a factor about 20.

Journal Title : Conference on Colour in Graphics, Imaging, and Vision
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/CGIV.2002.1.1.art00026
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M. Melgosa, R. Huertas, M.J. Rivas, E. Hita, "Influence of Tristimulus Values Correlation and Reference White in Error Propagation to CIELUV and CIELAB Color Parameters"  in Proc. IS&T CGIV 2002 First European Conf. on Colour in Graphics, Imaging, and Vision,  2002,  pp 112 - 115,  https://doi.org/10.2352/CGIV.2002.1.1.art00026

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Copyright © Society for Imaging Science and Technology 2002
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Conference on Colour in Graphics, Imaging, and Vision
conf colour graph imag vis
2158-6330
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2158-6330(20020101)2002:1L.112;1-
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Articles
Influence of Tristimulus Values Correlation and Reference White in Error Propagation to CIELUV and CIELAB Color Parameters
MelgosaM.
HuertasR.
RivasM.J.
HitaE.
01012002
2002
1
112
115
2002
Random errors propagation from tristimulus values to CIELUV and CIELAB color parameters has been studied considering two factors usually neglected in the literature: the correlation among tristimulus values measurements, and the associated error to the measurement of the reference white. Our study is based on experimental measurements performed by a modern spectroradiometer (SpectraScan PR-704 Photo Research), using 28 Munsell samples illuminated by 3 different luminous sources (D65, F and TL84) provided by a VeriVide color assessment cabinet. Sets of 10 measurements were made by 3 different procedures (short temporal period, large temporal period, and spatial variation), for each one of the color samples and luminous sources mentioned above. Correlation among tristimulus values reduces the error propagated to CIELUV and CIELAB color parameters in a factor up to 2.6, this effect being minimum for L* and b*. The errors in the tristimulus values of the reference white increase the error propagated to CIELUV and CIELAB color parameters in a factor up to 1.8. Anyway, under our experimental conditions, the instrumental errors of the a* and b* coordinates are lower than the visual sub-thresholds predicted by the CIE94 model in a factor about 20.