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![]() ![]() Specifically, pounds is assigned to the lightness difference L, vividness difference M, and color difference L by making use of weighting coefficients SL, SC, and Sh respectively. These weighting coéfficients SL, SC, ánd Sh consist of the effects of lightness D, saturation C, and hue position h. Consequently, the calculation incorporates the features of the color discrimination tolerance of the individual eyes on the colour room of CIE Laboratory (Lab color system): 1) Saturation addiction, 2) Color dependency, and 3) Lightness addiction. For the specific calculation formulation, pertain to COLOR TERMS. With CIE 2000, color difference E00 is definitely displayed with an ellipse having the major axis in the direction of vividness, which is usually related to the shape of the colour discrimination tolerance of the individual eye. ![]() In the region with increased vividness, the considering coefficient SC turns into greater compared with other coefficients SL and Sh, so that the ellipse becomes more in the direction of saturation (lower sensitivity to vividness variations). With the CIE 2000 color difference formula, the impact on the hue angle is furthermore considered. As a result, the method can manage with another characteristic of the color discrimination tolerance of the individual eyes on the color space of CIE Lab (Lab color space): 4) Modification in the path of the colour discrimination tolerance around the hue angle of 270 degrees (glowing blue) (deviation from the direction of saturation). The calculation formula also includes cónstants kL, kC, ánd kh, called parametric coefficients. Users can designate their values as desired to obtain flexibility for conducting color management based to numerous objects.
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