Measuring Instruments

Giving Shape to Ideas

Precise Color Communication

CIE Lab (L*a*b* color space) represents colors by using the coordinates in a uniform color space consisting of lightness variable L* and chromaticity indices a* and b*. Although the calculation formula was defined based on the color vision of the human eye, some color differences are evaluated differently between the color difference ΔE*ab and the human eye. This is because the color discrimination threshold of the human eye greatly differs from the range of color differences ΔE*ab and Δa*b* defined by CIE Lab.

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