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Chromatic-Discrimination Ellipses with a Pair-Comparison Method for Different Neutral Backgrounds and Anchor Pair Colour-Difference Sizes

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As stated by the CIE Technical Committee 1-28 (Parameters Affecting Colour-Difference Evaluation), the effect of background may be one of the most important parametric effects. Although there are several studies on this subject, neither a full range of light-to-dark neutral backgrounds nor a possible connection with the colourdifference size of the anchor pair employed have been reported. We have calculated CIELAB chromaticdiscrimination ellipses at the five CIE centres using a CRT device, 5 neutral backgrounds regularly spaced between L*0 and 100, and 3 neutral anchor pairs having colour differences of 2, 5 and 10 CIELAB units. The calculated ellipses were compared using the VAB coefficient proposed by Strocka (Colour Research & Appl. 8, 169-175, 1983). Preliminary results show that increasing the colour-difference size of the anchor pair, the effect of a background change on colour-discrimination ellipses becomes lower (30% for ΔE = 2 and 17% for ΔE = 10). In addition, on increasing the background lightness, the effect of the changes in the anchor-pair colour-difference on chromatic-discrimination ellipses is slightly less (19% and 14% for black and white backgrounds, respectively).
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Document Type: Research Article

Publication date: January 1, 2002

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  • Started in 2002 and merged with the Color and Imaging Conference (CIC) in 2014, CGIV covered a wide range of topics related to colour and visual information, including color science, computational color, color in computer graphics, color reproduction, volor vision/psychophysics, color image quality, color image processing, and multispectral color science. Drawing papers from researchers, scientists, and engineers worldwide, DGIV offered attendees a unique experience to share with colleagues in industry and academic, and on national and international standards committees. Held every year in Europe, DGIV papers were more academic in their focus and had high student participation rates.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual papers for details.

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