The system CIE Lab scale in early CIE set scale color measurement is used X-Y-Z recitative
.Describe the red (Red), green (Green) and blue (Blue), but because the system cannot describe the darkness - bright colors. CIE has developed a system X-Y-L which describe the red, green, and light (lightness), respectively.CIE developed later into acceptable color system, and is widely used at present is the system L * - a *- b *, which is the lecture system color 3 dimensions. The core L * will describe the brightness (lightness) from the L * refers to the white to - L * represents the black.A * to describe axial color from green (- A *) to red (a *) core B * to describe axial color from blue to yellow b * (-) (*) B narrative feature, its color. CIE show has shown 2.And 18 2.In addition, the company Hunter 19 lab in America is an organization for which the system research and color measurement. Finally, system of Hunter. Lab itself, which is called the measurement system colors Hunter lab scale which describe axis in 3 dimension as well as CIE system without Hunter.To use the scale L-a-b describe colors as well as L * - A * - B * of CIE differences between the color of CIE Hunter formula calculation and lab is color. The L-a-b L * * - and - a b * has a basic calculation from the system X-Y-Z all
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